cpython.git - https://github.com/python/cpython.git

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author	Terry Jan Reedy <tjreedy@udel.edu>	2012-08-17 19:42:12 (GMT)
committer	Terry Jan Reedy <tjreedy@udel.edu>	2012-08-17 19:42:12 (GMT)
commit	bbfe573d9d5fbae478199ccff07c39f5b2de499d (patch)
tree	61d51dc2768995e9230d65ddbd090ca4a79d854f /Python/compile.c
parent	1b79918641e1db92a30367a7bef7be77fe6a2de2 (diff)
parent	f6190c146347c088d1927e95fa5cb3cfbea6f423 (diff)
download	cpython-bbfe573d9d5fbae478199ccff07c39f5b2de499d.zip cpython-bbfe573d9d5fbae478199ccff07c39f5b2de499d.tar.gz cpython-bbfe573d9d5fbae478199ccff07c39f5b2de499d.tar.bz2

Merge with 3.2 #15660

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#
# __COPYRIGHT__
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#

__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

# Define a null function for use as a builder action.
# Where this is defined in the file seems to affect its
# byte-code contents, so try to minimize changes by
# defining it here, before we even import anything.
def Func():
    pass

import os.path
import sys
import types
import unittest

import TestCmd

import SCons.Action
import SCons.Builder
import SCons.Environment
import SCons.Errors

# Initial setup of the common environment for all tests,
# a temporary working directory containing a
# script for writing arguments to an output file.
#
# We don't do this as a setUp() method because it's
# unnecessary to create a separate directory and script
# for each test, they can just use the one.
test = TestCmd.TestCmd(workdir = '')

outfile = test.workpath('outfile')
outfile2 = test.workpath('outfile2')

show_string = None

scons_env = SCons.Environment.Environment()

env_arg2nodes_called = None

class Environment:
    def __init__(self, **kw):
        self.d = {}
        self.d['SHELL'] = scons_env['SHELL']
        self.d['SPAWN'] = scons_env['SPAWN']
        self.d['ESCAPE'] = scons_env['ESCAPE']
        for k, v in kw.items():
            self.d[k] = v
        global env_arg2nodes_called
        env_arg2nodes_called = None
        self.scanner = None
    def subst(self, s):
        if not SCons.Util.is_String(s):
            return s
        try:
            if s[0] == '$':
                return self.d.get(s[1:], '')
            if s[1] == '$':
                return s[0] + self.d.get(s[2:], '')
        except IndexError:
            pass
        return self.d.get(s, s)
    def arg2nodes(self, args, factory):
        global env_arg2nodes_called
        env_arg2nodes_called = 1
        if not SCons.Util.is_List(args):
            args = [args]
        list = []
        for a in args:
            if SCons.Util.is_String(a):
                a = factory(a)
            list.append(a)
        return list
    def get_scanner(self, ext):
        return self.scanner
    def Dictionary(self):
        return {}
    def autogenerate(self, dir=''):
        return {}
    def __setitem__(self, item, var):
        self.d[item] = var
    def __getitem__(self, item):
        return self.d[item]
    def has_key(self, item):
        return self.d.has_key(item)
    def keys(self):
        return self.d.keys()
    def get(self, key, value=None):
        return self.d.get(key, value)
    def Override(self, overrides):
        env = apply(Environment, (), self.d)
        env.d.update(overrides)
        return env
    def _update(self, dict):
        self.d.update(dict)
    def items(self):
        return self.d.items()
    def sig_dict(self):
        d = {}
        for k,v in self.items(): d[k] = v
        d['TARGETS'] = ['__t1__', '__t2__', '__t3__', '__t4__', '__t5__', '__t6__']
        d['TARGET'] = d['TARGETS'][0]
        d['SOURCES'] = ['__s1__', '__s2__', '__s3__', '__s4__', '__s5__', '__s6__']
        d['SOURCE'] = d['SOURCES'][0]
        return d

class MyNode_without_target_from_source:
    def __init__(self, name):
        self.name = name
        self.sources = []
        self.builder = None
        self.side_effect = 0
        self.source_scanner = None
        self.backup_source_scanner = None
    def __str__(self):
        return self.name
    def builder_set(self, builder):
        self.builder = builder
    def has_builder(self):
        return not self.builder is None
    def has_explicit_builder(self):
        return not self.builder is None and self.builder.is_explicit
    def env_set(self, env, safe=0):
        self.env = env
    def add_source(self, source):
        self.sources.extend(source)
    def scanner_key(self):
        return self.name
    def is_derived(self):
        return self.has_builder()
    def generate_build_env(self, env):
        return env
    def get_build_env(self):
        return self.executor.get_build_env()
    def set_executor(self, executor):
        self.executor = executor
    def get_executor(self, create=1):
        return self.executor

class MyNode(MyNode_without_target_from_source):
    def target_from_source(self, prefix, suffix, stripext):
        return MyNode(prefix + stripext(str(self))[0] + suffix)

class BuilderTestCase(unittest.TestCase):

    def test__init__(self):
        """Test simple Builder creation
        """
        builder = SCons.Builder.Builder(action="foo")
        assert not builder is None, builder
        builder = SCons.Builder.Builder(action="foo", OVERRIDE='x')
        x = builder.overrides['OVERRIDE']
        assert x == 'x', x

    def test__nonzero__(self):
        """Test a builder raising an exception when __nonzero__ is called
        """
        builder = SCons.Builder.Builder(action="foo")
        exc_caught = None
        try:
            builder.__nonzero__()
        except SCons.Errors.InternalError:
            exc_caught = 1
        assert exc_caught, "did not catch expected InternalError exception"

        class Node:
             pass

        n = Node()
        n.builder = builder
        exc_caught = None
        try:
            if n.builder:
                pass
        except SCons.Errors.InternalError:
            exc_caught = 1
        assert exc_caught, "did not catch expected InternalError exception"

    def test__call__(self):
        """Test calling a builder to establish source dependencies
        """
        env = Environment()
        builder = SCons.Builder.Builder(action="foo",
                                        target_factory=MyNode,
                                        source_factory=MyNode)

        n1 = MyNode("n1");
        n2 = MyNode("n2");
        builder(env, target = n1, source = n2)
        assert env_arg2nodes_called
        assert n1.env == env, n1.env
        assert n1.builder == builder, n1.builder
        assert n1.sources == [n2], n1.sources
        assert n1.executor, "no executor found"
        assert not hasattr(n2, 'env')

        target = builder(env, target = 'n3', source = 'n4')[0]
        assert target.name == 'n3'
        assert target.sources[0].name == 'n4'

        target = builder(env, target = 'n4 n5', source = ['n6 n7'])[0]
        assert target.name == 'n4 n5'
        assert target.sources[0].name == 'n6 n7'

        target = builder(env, target = ['n8 n9'], source = 'n10 n11')[0]
        assert target.name == 'n8 n9'
        assert target.sources[0].name == 'n10 n11'

        # A test to be uncommented when we freeze the environment
        # as part of calling the builder.
        #env1 = Environment(VAR='foo')
        #target = builder(env1, target = 'n12', source = 'n13')
        #env1['VAR'] = 'bar'
        #be = target.get_build_env()
        #assert be['VAR'] == 'foo', be['VAR']

        if not hasattr(types, 'UnicodeType'):
            uni = str
        else:
            uni = unicode

        target = builder(env, target = uni('n12 n13'),
                          source = [uni('n14 n15')])[0]
        assert target.name == uni('n12 n13')
        assert target.sources[0].name == uni('n14 n15')

        target = builder(env, target = [uni('n16 n17')],
                         source = uni('n18 n19'))[0]
        assert target.name == uni('n16 n17')
        assert target.sources[0].name == uni('n18 n19')

        n20 = MyNode_without_target_from_source('n20')
        flag = 0
        try:
            target = builder(env, source=n20)
        except SCons.Errors.UserError, e:
            flag = 1
        assert flag, "UserError should be thrown if a source node can't create a target."

        builder = SCons.Builder.Builder(action="foo",
                                        target_factory=MyNode,
                                        source_factory=MyNode,
                                        prefix='p-',
                                        suffix='.s')
        target = builder(env, source='n21')[0]
        assert target.name == 'p-n21.s', target

        builder = SCons.Builder.Builder(misspelled_action="foo",
                                        suffix = '.s')
        try:
            builder(env, target = 'n22', source = 'n22')
        except SCons.Errors.UserError, e:
            pass
        else:
            raise "Did not catch expected UserError."

    def test_mistaken_variables(self):
        """Test keyword arguments that are often mistakes
        """
        import SCons.Warnings
        env = Environment()
        builder = SCons.Builder.Builder(action="foo")

        save_warn = SCons.Warnings.warn
        warned = []
        def my_warn(exception, warning, warned=warned):
            warned.append(warning)
        SCons.Warnings.warn = my_warn

        try:
            target = builder(env, 'mistaken1', sources='mistaken1.c')
            assert warned == ["Did you mean to use `source' instead of `sources'?"], warned
            del warned[:]

            target = builder(env, 'mistaken2', targets='mistaken2.c')
            assert warned == ["Did you mean to use `target' instead of `targets'?"], warned
            del warned[:]

            target = builder(env, 'mistaken3', targets='mistaken3', sources='mistaken3.c')
            assert "Did you mean to use `source' instead of `sources'?" in warned, warned
            assert "Did you mean to use `target' instead of `targets'?" in warned, warned
            del warned[:]
        finally:
            SCons.Warnings.warn = save_warn

    def test_action(self):
        """Test Builder creation

        Verify that we can retrieve the supplied action attribute.
        """
        builder = SCons.Builder.Builder(action="foo")
        assert builder.action.cmd_list == "foo"

        def func():
            pass
        builder = SCons.Builder.Builder(action=func)
        assert isinstance(builder.action, SCons.Action.FunctionAction)
        # Preserve the following so that the baseline test will fail.
        # Remove it in favor of the previous test at some convenient
        # point in the future.
        assert builder.action.execfunction == func

    def test_generator(self):
        """Test Builder creation given a generator function."""

        def generator():
            pass

        builder = SCons.Builder.Builder(generator=generator)
        assert builder.action.generator == generator

    def test_cmp(self):
        """Test simple comparisons of Builder objects
        """
        b1 = SCons.Builder.Builder(src_suffix = '.o')
        b2 = SCons.Builder.Builder(src_suffix = '.o')
        assert b1 == b2
        b3 = SCons.Builder.Builder(src_suffix = '.x')
        assert b1 != b3
        assert b2 != b3

    def test_target_factory(self):
        """Test a Builder that creates target nodes of a specified class
        """
        class Foo:
            pass
        def FooFactory(target):
            global Foo
            return Foo(target)
        builder = SCons.Builder.Builder(target_factory = FooFactory)
        assert builder.target_factory is FooFactory
        assert not builder.source_factory is FooFactory

    def test_source_factory(self):
        """Test a Builder that creates source nodes of a specified class
        """
        class Foo:
            pass
        def FooFactory(source):
            global Foo
            return Foo(source)
        builder = SCons.Builder.Builder(source_factory = FooFactory)
        assert not builder.target_factory is FooFactory
        assert builder.source_factory is FooFactory

    def test_splitext(self):
        """Test the splitext() method attached to a Builder."""
        b = SCons.Builder.Builder()
        assert b.splitext('foo') == ('foo','')
        assert b.splitext('foo.bar') == ('foo','.bar')
        assert b.splitext(os.path.join('foo.bar', 'blat')) == (os.path.join('foo.bar', 'blat'),'')

        class MyBuilder(SCons.Builder.BuilderBase):
            def splitext(self, path):
                return "called splitext()"

        b = MyBuilder()
        ret = b.splitext('xyz.c')
        assert ret == "called splitext()", ret

    def test_adjust_suffix(self):
        """Test how a Builder adjusts file suffixes
        """
        b = SCons.Builder.Builder()
        assert b.adjust_suffix('.foo') == '.foo'
        assert b.adjust_suffix('foo') == '.foo'
        assert b.adjust_suffix('$foo') == '$foo'

        class MyBuilder(SCons.Builder.BuilderBase):
            def adjust_suffix(self, suff):
                return "called adjust_suffix()"

        b = MyBuilder()
        ret = b.adjust_suffix('.foo')
        assert ret == "called adjust_suffix()", ret

    def test_prefix(self):
        """Test Builder creation with a specified target prefix

        Make sure that there is no '.' separator appended.
        """
        env = Environment()
        builder = SCons.Builder.Builder(prefix = 'lib.')
        assert builder.get_prefix(env) == 'lib.'
        builder = SCons.Builder.Builder(prefix = 'lib', action='')
        assert builder.get_prefix(env) == 'lib'
        tgt = builder(env, target = 'tgt1', source = 'src1')[0]
        assert tgt.path == 'libtgt1', \
                "Target has unexpected name: %s" % tgt.path
        tgt = builder(env, target = 'tgt2a tgt2b', source = 'src2')[0]
        assert tgt.path == 'libtgt2a tgt2b', \
                "Target has unexpected name: %s" % tgt.path
        tgt = builder(env, source = 'src3')[0]
        assert tgt.path == 'libsrc3', \
                "Target has unexpected name: %s" % tgt.path
        tgt = builder(env, source = 'lib/src4')[0]
        assert tgt.path == os.path.join('lib', 'libsrc4'), \
                "Target has unexpected name: %s" % tgt.path
        tgt = builder(env, target = 'lib/tgt5', source = 'lib/src5')[0]
        assert tgt.path == os.path.join('lib', 'libtgt5'), \
                "Target has unexpected name: %s" % tgt.path

        def gen_prefix(env, sources):
            return "gen_prefix() says " + env['FOO']
        my_env = Environment(FOO = 'xyzzy')
        builder = SCons.Builder.Builder(prefix = gen_prefix)
        assert builder.get_prefix(my_env) == "gen_prefix() says xyzzy"
        my_env['FOO'] = 'abracadabra'
        assert builder.get_prefix(my_env) == "gen_prefix() says abracadabra"

        def my_emit(env, sources):
            return env.subst('$EMIT')
        my_env = Environment(FOO = '.foo', EMIT = 'emit-')
        builder = SCons.Builder.Builder(prefix = {None   : 'default-',
                                                  '.in'  : 'out-',
                                                  '.x'   : 'y-',
                                                  '$FOO' : 'foo-',
                                                  '.zzz' : my_emit},
                                        action = '')
        tgt = builder(my_env, source = 'f1')[0]
        assert tgt.path == 'default-f1', tgt.path
        tgt = builder(my_env, source = 'f2.c')[0]
        assert tgt.path == 'default-f2', tgt.path
        tgt = builder(my_env, source = 'f3.in')[0]
        assert tgt.path == 'out-f3', tgt.path
        tgt = builder(my_env, source = 'f4.x')[0]
        assert tgt.path == 'y-f4', tgt.path
        tgt = builder(my_env, source = 'f5.foo')[0]
        assert tgt.path == 'foo-f5', tgt.path
        tgt = builder(my_env, source = 'f6.zzz')[0]
        assert tgt.path == 'emit-f6', tgt.path

    def test_src_suffix(self):
        """Test Builder creation with a specified source file suffix
        
        Make sure that the '.' separator is appended to the
        beginning if it isn't already present.
        """
        env = Environment(XSUFFIX = '.x', YSUFFIX = '.y')

        b1 = SCons.Builder.Builder(src_suffix = '.c', action='')
        assert b1.src_suffixes(env) == ['.c'], b1.src_suffixes(env)

        tgt = b1(env, target = 'tgt2', source = 'src2')[0]
        assert tgt.sources[0].path == 'src2.c', \
                "Source has unexpected name: %s" % tgt.sources[0].path

        tgt = b1(env, target = 'tgt3', source = 'src3a src3b')[0]
        assert len(tgt.sources) == 1
        assert tgt.sources[0].path == 'src3a src3b.c', \
                "Unexpected tgt.sources[0] name: %s" % tgt.sources[0].path

        b2 = SCons.Builder.Builder(src_suffix = '.2', src_builder = b1)
        assert b2.src_suffixes(env) == ['.2', '.c'], b2.src_suffixes(env)

        b3 = SCons.Builder.Builder(action = {'.3a' : '', '.3b' : ''})
        s = b3.src_suffixes(env)
        s.sort()
        assert s == ['.3a', '.3b'], s

        b4 = SCons.Builder.Builder(src_suffix = '$XSUFFIX')
        assert b4.src_suffixes(env) == ['.x'], b4.src_suffixes(env)

        b5 = SCons.Builder.Builder(action = { '.y' : ''})
        assert b5.src_suffixes(env) == ['.y'], b5.src_suffixes(env)

    def test_srcsuffix_nonext(self):
        "Test target generation from non-extension source suffixes"
        env = Environment()
        b6 = SCons.Builder.Builder(action = '',
                                   src_suffix='_src.a',
                                   suffix='.b')
        tgt = b6(env, source='foo_src.a')
        assert str(tgt[0]) == 'foo.b', str(tgt[0])

        b7 = SCons.Builder.Builder(action = '',
                                   src_suffix='_source.a',
                                   suffix='_obj.b')
        b8 = SCons.Builder.Builder(action = '',
                                   src_builder=b7,
                                   suffix='.c')
        tgt = b8(env, source='foo_source.a')
        assert str(tgt[0]) == 'foo_obj.c', str(tgt[0])
        src = SCons.Node.FS.default_fs.File('foo_source.a')
        tgt = b8(env, source=src)
        assert str(tgt[0]) == 'foo_obj.c', str(tgt[0])

        b9 = SCons.Builder.Builder(action={'_src.a' : 'srcaction'},
                                   suffix='.c')
        b9.add_action('_altsrc.b', 'altaction')
        tgt = b9(env, source='foo_altsrc.b')
        assert str(tgt[0]) == 'foo.c', str(tgt[0])

    def test_suffix(self):
        """Test Builder creation with a specified target suffix

        Make sure that the '.' separator is appended to the
        beginning if it isn't already present.
        """
        env = Environment()
        builder = SCons.Builder.Builder(suffix = '.o')
        assert builder.get_suffix(env) == '.o', builder.get_suffix(env)
        builder = SCons.Builder.Builder(suffix = 'o', action='')
        assert builder.get_suffix(env) == '.o', builder.get_suffix(env)
        tgt = builder(env, target = 'tgt3', source = 'src3')[0]
        assert tgt.path == 'tgt3.o', \
                "Target has unexpected name: %s" % tgt.path
        tgt = builder(env, target = 'tgt4a tgt4b', source = 'src4')[0]
        assert tgt.path == 'tgt4a tgt4b.o', \
                "Target has unexpected name: %s" % tgt.path
        tgt = builder(env, source = 'src5')[0]
        assert tgt.path == 'src5.o', \
                "Target has unexpected name: %s" % tgt.path

        def gen_suffix(env, sources):
            return "gen_suffix() says " + env['BAR']
        my_env = Environment(BAR = 'hocus pocus')
        builder = SCons.Builder.Builder(suffix = gen_suffix)
        assert builder.get_suffix(my_env) == "gen_suffix() says hocus pocus", builder.get_suffix(my_env)
        my_env['BAR'] = 'presto chango'
        assert builder.get_suffix(my_env) == "gen_suffix() says presto chango"

        def my_emit(env, sources):
            return env.subst('$EMIT')
        my_env = Environment(BAR = '.bar', EMIT = '.emit')
        builder = SCons.Builder.Builder(suffix = {None   : '.default',
                                                  '.in'  : '.out',
                                                  '.x'   : '.y',
                                                  '$BAR' : '.new',
                                                  '.zzz' : my_emit},
                                        action='')
        tgt = builder(my_env, source = 'f1')[0]
        assert tgt.path == 'f1.default', tgt.path
        tgt = builder(my_env, source = 'f2.c')[0]
        assert tgt.path == 'f2.default', tgt.path
        tgt = builder(my_env, source = 'f3.in')[0]
        assert tgt.path == 'f3.out', tgt.path
        tgt = builder(my_env, source = 'f4.x')[0]
        assert tgt.path == 'f4.y', tgt.path
        tgt = builder(my_env, source = 'f5.bar')[0]
        assert tgt.path == 'f5.new', tgt.path
        tgt = builder(my_env, source = 'f6.zzz')[0]
        assert tgt.path == 'f6.emit', tgt.path

    def test_single_source(self):
        """Test Builder with single_source flag set"""
        def func(target, source, env):
            open(str(target[0]), "w")
            if (len(source) == 1 and len(target) == 1):
                env['CNT'][0] = env['CNT'][0] + 1
                
        env = Environment()
        infiles = []
        outfiles = []
        for i in range(10):
            infiles.append(test.workpath('%d.in' % i))
            outfiles.append(test.workpath('%d.out' % i))
            test.write(infiles[-1], "\n")
        builder = SCons.Builder.Builder(action=SCons.Action.Action(func,None),
                                        single_source = 1, suffix='.out')
        env['CNT'] = [0]
        tgt = builder(env, target=outfiles[0], source=infiles[0])[0]
        tgt.prepare()
        tgt.build()
        assert env['CNT'][0] == 1, env['CNT'][0]
        tgt = builder(env, outfiles[1], infiles[1])[0]
        tgt.prepare()
        tgt.build()
        assert env['CNT'][0] == 2
        tgts = builder(env, infiles[2:4])
        for t in tgts: t.prepare()
        tgts[0].build()
        tgts[1].build()
        assert env['CNT'][0] == 4
        try:
            tgt = builder(env, outfiles[4], infiles[4:6])
        except SCons.Errors.UserError:
            pass
        else:
            assert 0
        try:
            # The builder may output more than one target per input file.
            tgt = builder(env, outfiles[4:6], infiles[4:6])
        except SCons.Errors.UserError:
            pass
        else:
            assert 0
        
        
    def test_ListBuilder(self):
        """Testing ListBuilder class."""
        def function2(target, source, env, tlist = [outfile, outfile2], **kw):
            for t in target:
                open(str(t), 'w').write("function2\n")
            for t in tlist:
                if not t in map(str, target):
                    open(t, 'w').write("function2\n")
            return 1

        env = Environment()
        builder = SCons.Builder.Builder(action = function2)
        tgts = builder(env, target = [outfile, outfile2], source = 'foo')
        for t in tgts:
            t.prepare()
        try:
            tgts[0].build()
        except SCons.Errors.BuildError:
            pass
        c = test.read(outfile, 'r')
        assert c == "function2\n", c
        c = test.read(outfile2, 'r')
        assert c == "function2\n", c

        sub1_out = test.workpath('sub1', 'out')
        sub2_out = test.workpath('sub2', 'out')

        def function3(target, source, env, tlist = [sub1_out, sub2_out]):
            for t in target:
                open(str(t), 'w').write("function3\n")
            for t in tlist:
                if not t in map(str, target):
                    open(t, 'w').write("function3\n")
            return 1

        builder = SCons.Builder.Builder(action = function3)
        tgts = builder(env, target = [sub1_out, sub2_out], source = 'foo')
        for t in tgts:
            t.prepare()
        try:
            tgts[0].build()
        except SCons.Errors.BuildError:
            pass
        c = test.read(sub1_out, 'r')
        assert c == "function3\n", c
        c = test.read(sub2_out, 'r')
        assert c == "function3\n", c
        assert os.path.exists(test.workpath('sub1'))
        assert os.path.exists(test.workpath('sub2'))

    def test_MultiStepBuilder(self):
        """Testing MultiStepBuilder class."""
        env = Environment()
        builder1 = SCons.Builder.Builder(action='foo',
                                         src_suffix='.bar',
                                         suffix='.foo')
        builder2 = SCons.Builder.MultiStepBuilder(action='bar',
                                                  src_builder = builder1,
                                                  src_suffix = '.foo')

        tgt = builder2(env, target='baz',
                       source=['test.bar', 'test2.foo', 'test3.txt'])[0]
        assert str(tgt.sources[0]) == 'test.foo', str(tgt.sources[0])
        assert str(tgt.sources[0].sources[0]) == 'test.bar', \
               str(tgt.sources[0].sources[0])
        assert str(tgt.sources[1]) == 'test2.foo', str(tgt.sources[1])
        assert str(tgt.sources[2]) == 'test3.txt', str(tgt.sources[2])

        tgt = builder2(env, 'aaa.bar')[0]
        assert str(tgt) == 'aaa', str(tgt)
        assert str(tgt.sources[0]) == 'aaa.foo', str(tgt.sources[0])
        assert str(tgt.sources[0].sources[0]) == 'aaa.bar', \
               str(tgt.sources[0].sources[0])

        builder3 = SCons.Builder.MultiStepBuilder(action = 'foo',
                                                  src_builder = 'xyzzy',
                                                  src_suffix = '.xyzzy')
        assert builder3.get_src_builders(Environment()) == []

        builder4 = SCons.Builder.Builder(action='bld4',
                                         src_suffix='.i',
                                         suffix='_wrap.c')
        builder5 = SCons.Builder.MultiStepBuilder(action='bld5',
                                                  src_builder=builder4,
                                                  suffix='.obj',
                                                  src_suffix='.c')
        builder6 = SCons.Builder.MultiStepBuilder(action='bld6',
                                                  src_builder=builder5,
                                                  suffix='.exe',
                                                  src_suffix='.obj')
        tgt = builder6(env, 'test', 'test.i')[0]
        assert str(tgt) == 'test.exe', str(tgt)
        assert str(tgt.sources[0]) == 'test_wrap.obj', str(tgt.sources[0])
        assert str(tgt.sources[0].sources[0]) == 'test_wrap.c', \
               str(tgt.sources[0].sources[0])
        assert str(tgt.sources[0].sources[0].sources[0]) == 'test.i', \
               str(tgt.sources[0].sources[0].sources[0])
        
    def test_CompositeBuilder(self):
        """Testing CompositeBuilder class."""
        def func_action(target, source, env):
            return 0
        
        env = Environment(BAR_SUFFIX = '.BAR2', FOO_SUFFIX = '.FOO2')
        builder = SCons.Builder.Builder(action={ '.foo' : func_action,
                                                 '.bar' : func_action,
                                                 '$BAR_SUFFIX' : func_action,
                                                 '$FOO_SUFFIX' : func_action })
        
        assert isinstance(builder, SCons.Builder.CompositeBuilder)
        assert isinstance(builder.action, SCons.Action.CommandGeneratorAction)
        tgt = builder(env, target='test1', source='test1.foo')[0]
        assert isinstance(tgt.builder, SCons.Builder.BuilderBase)
        assert tgt.builder.action is builder.action
        tgt = builder(env, target='test2', source='test1.bar')[0]
        assert isinstance(tgt.builder, SCons.Builder.BuilderBase)
        assert tgt.builder.action is builder.action
        flag = 0
        tgt = builder(env, target='test3', source=['test2.bar', 'test1.foo'])[0]
        try:
            tgt.build()
        except SCons.Errors.UserError, e:
            flag = 1
        assert flag, "UserError should be thrown when we build targets with files of different suffixes."
        match = str(e) == "While building `['test3']' from `test1.foo': Cannot build multiple sources with different extensions: .bar, .foo"
        assert match, e

        tgt = builder(env, target='test4', source=['test4.BAR2'])[0]
        assert isinstance(tgt.builder, SCons.Builder.BuilderBase)
        try:
            tgt.build()
            flag = 1
        except SCons.Errors.UserError, e:
            print e
            flag = 0
        assert flag, "It should be possible to define actions in composite builders using variables."
        env['FOO_SUFFIX'] = '.BAR2'
        builder.add_action('$NEW_SUFFIX', func_action)
        flag = 0
        tgt = builder(env, target='test5', source=['test5.BAR2'])[0]
        try:
            tgt.build()
        except SCons.Errors.UserError:
            flag = 1
        assert flag, "UserError should be thrown when we build targets with ambigous suffixes."
        del env.d['FOO_SUFFIX']
        del env.d['BAR_SUFFIX']

        foo_bld = SCons.Builder.Builder(action = 'a-foo',
                                        src_suffix = '.ina',
                                        suffix = '.foo')
        assert isinstance(foo_bld, SCons.Builder.BuilderBase)
        builder = SCons.Builder.Builder(action = { '.foo' : 'foo',
                                                   '.bar' : 'bar' },
                                        src_builder = foo_bld)
        assert isinstance(builder, SCons.Builder.CompositeBuilder)
        assert isinstance(builder.action, SCons.Action.CommandGeneratorAction)

        tgt = builder(env, target='t1', source='t1a.ina t1b.ina')[0]
        assert isinstance(tgt.builder, SCons.Builder.BuilderBase)

        tgt = builder(env, target='t2', source='t2a.foo t2b.ina')[0]
        assert isinstance(tgt.builder, SCons.Builder.MultiStepBuilder), tgt.builder.__dict__

        bar_bld = SCons.Builder.Builder(action = 'a-bar',
                                        src_suffix = '.inb',
                                        suffix = '.bar')
        assert isinstance(bar_bld, SCons.Builder.BuilderBase)
        builder = SCons.Builder.Builder(action = { '.foo' : 'foo'},
                                        src_builder = [foo_bld, bar_bld])
        assert isinstance(builder, SCons.Builder.CompositeBuilder)
        assert isinstance(builder.action, SCons.Action.CommandGeneratorAction)

        builder.add_action('.bar', 'bar')

        tgt = builder(env, target='t3-foo', source='t3a.foo t3b.ina')[0]
        assert isinstance(tgt.builder, SCons.Builder.MultiStepBuilder)

        tgt = builder(env, target='t3-bar', source='t3a.bar t3b.inb')[0]
        assert isinstance(tgt.builder, SCons.Builder.MultiStepBuilder)

        flag = 0
        tgt = builder(env, target='t5', source=['test5a.foo', 'test5b.inb'])[0]
        try:
            tgt.build()
        except SCons.Errors.UserError, e:
            flag = 1
        assert flag, "UserError should be thrown when we build targets with files of different suffixes."
        match = str(e) == "While building `['t5']' from `test5b.bar': Cannot build multiple sources with different extensions: .foo, .bar"
        assert match, e

        flag = 0
        tgt = builder(env, target='t6', source=['test6a.bar', 'test6b.ina'])[0]
        try:
            tgt.build()
        except SCons.Errors.UserError, e:
            flag = 1
        assert flag, "UserError should be thrown when we build targets with files of different suffixes."
        match = str(e) == "While building `['t6']' from `test6b.foo': Cannot build multiple sources with different extensions: .bar, .foo"
        assert match, e

        flag = 0
        tgt = builder(env, target='t4', source=['test4a.ina', 'test4b.inb'])[0]
        try:
            tgt.build()
        except SCons.Errors.UserError, e:
            flag = 1
        assert flag, "UserError should be thrown when we build targets with files of different suffixes."
        match = str(e) == "While building `['t4']' from `test4b.bar': Cannot build multiple sources with different extensions: .foo, .bar"
        assert match, e

        flag = 0
        tgt = builder(env, target='t7', source=['test7'])[0]
        try:
            tgt.build()
        except SCons.Errors.UserError, e:
            flag = 1
        assert flag, "UserError should be thrown when we build targets with files of different suffixes."
        match = str(e) == "While building `['t7']': Cannot deduce file extension from source files: ['test7']"
        assert match, e

        flag = 0
        tgt = builder(env, target='t8', source=['test8.unknown'])[0]
        try:
            tgt.build()
        except SCons.Errors.UserError, e:
            flag = 1
        assert flag, "UserError should be thrown when we build targets with files of different suffixes."
        match = str(e) == "While building `['t8']': Don't know how to build a file with suffix `.unknown'."
        assert match, e

    def test_target_scanner(self):
        """Testing ability to set target and source scanners through a builder."""
        global instanced
        class TestScanner:
            pass
        tscan = TestScanner()
        sscan = TestScanner()
        env = Environment()
        builder = SCons.Builder.Builder(target_scanner=tscan,
                                        source_scanner=sscan,
                                        action='')
        tgt = builder(env, target='foo2', source='bar')[0]
        assert tgt.target_scanner == tscan, tgt.target_scanner
        assert tgt.source_scanner == sscan, tgt.source_scanner

        builder1 = SCons.Builder.Builder(action='foo',
                                         src_suffix='.bar',
                                         suffix='.foo')
        builder2 = SCons.Builder.Builder(action='foo',
                                         src_builder = builder1,
                                         target_scanner = tscan,
                                         source_scanner = tscan)
        tgt = builder2(env, target='baz2', source='test.bar test2.foo test3.txt')[0]
        assert tgt.target_scanner == tscan, tgt.target_scanner
        assert tgt.source_scanner == tscan, tgt.source_scanner

    def test_actual_scanner(self):
        """Test usage of actual Scanner objects."""

        import SCons.Scanner

        def func(self):
            pass
        
        scanner = SCons.Scanner.Scanner(func, name='fooscan')

        b1 = SCons.Builder.Builder(action='bld', target_scanner=scanner)
        b2 = SCons.Builder.Builder(action='bld', target_scanner=scanner)
        b3 = SCons.Builder.Builder(action='bld')

        assert b1 == b2
        assert b1 != b3
        
    def test_src_scanner(slf):
        """Testing ability to set a source file scanner through a builder."""
        class TestScanner:
            def key(self, env):
                 return 'TestScannerkey'
            def instance(self, env):
                 return self

        scanner = TestScanner()
        builder = SCons.Builder.Builder(action='action')

        # With no scanner specified, source_scanner and
        # backup_source_scanner are None.
        env1 = Environment()
        tgt = builder(env1, target='foo1.x', source='bar.y')[0]
        src = tgt.sources[0]
        assert tgt.target_scanner != scanner, tgt.target_scanner
        assert src.source_scanner is None, src.source_scanner
        assert src.backup_source_scanner is None, src.backup_source_scanner

        # Later use of the same source file with an environment that
        # has a scanner must still set the scanner.
        env2 = Environment()
        env2.scanner = scanner
        tgt = builder(env2, target='foo2.x', source='bar.y')[0]
        src = tgt.sources[0]
        assert tgt.target_scanner != scanner, tgt.target_scanner
        assert src.source_scanner is None, src.source_scanner
        assert src.backup_source_scanner == scanner, src.backup_source_scanner

    def test_Builder_API(self):
        """Test Builder interface.

        Some of this is tested elsewhere in this file, but this is a
        quick collection of common operations on builders with various
        forms of component specifications."""

        builder = SCons.Builder.Builder()

        env = Environment(BUILDERS={'Bld':builder})
        r = builder.get_name(env)
        assert r == 'Bld', r
        r = builder.get_prefix(env)
        assert r == '', r
        r = builder.get_suffix(env)
        assert r == '', r
        r = builder.get_src_suffix(env)
        assert r == '', r
        r = builder.src_suffixes(env)
        assert r == [], r
        r = builder.targets('foo')
        assert r == ['foo'], r

        # src_suffix can be a single string or a list of strings

        builder.set_src_suffix('.foo')
        r = builder.get_src_suffix(env)
        assert r == '.foo', r
        r = builder.src_suffixes(env)
        assert r == ['.foo'], r

        builder.set_src_suffix(['.foo', '.bar'])
        r = builder.get_src_suffix(env)
        assert r == '.foo', r
        r = builder.src_suffixes(env)
        assert r == ['.foo', '.bar'], r

        builder.set_src_suffix(['.bar', '.foo'])
        r = builder.get_src_suffix(env)
        assert r == '.bar', r
        r = builder.src_suffixes(env)
        assert r == ['.bar', '.foo'], r

        # adjust_suffix normalizes the suffix, adding a `.' if needed

        r = builder.adjust_suffix('.foo')
        assert r == '.foo', r
        r = builder.adjust_suffix('_foo')
        assert r == '_foo', r
        r = builder.adjust_suffix('$foo')
        assert r == '$foo', r
        r = builder.adjust_suffix('foo')
        assert r == '.foo', r
        r = builder.adjust_suffix('f._$oo')
        assert r == '.f._$oo', r

        # prefix and suffix can be one of:
        #   1. a string (adjusted and env variables substituted),
        #   2. a function (passed (env,sources), returns suffix string)
        #   3. a dict of src_suffix:suffix settings, key==None is
        #      default suffix (special case of #2, so adjust_suffix
        #      not applied)

        builder = SCons.Builder.Builder(prefix='lib', suffix='foo')

        env = Environment(BUILDERS={'Bld':builder})
        r = builder.get_name(env)
        assert r == 'Bld', r
        r = builder.get_prefix(env)
        assert r == 'lib', r
        r = builder.get_suffix(env)
        assert r == '.foo', r

        mkpref = lambda env,sources: 'Lib'
        mksuff = lambda env,sources: '.Foo'
        builder = SCons.Builder.Builder(prefix=mkpref, suffix=mksuff)

        env = Environment(BUILDERS={'Bld':builder})
        r = builder.get_name(env)
        assert r == 'Bld', r
        r = builder.get_prefix(env)
        assert r == 'Lib', r
        r = builder.get_suffix(env)
        assert r == '.Foo', r

        builder = SCons.Builder.Builder(prefix='$PREF', suffix='$SUFF')

        env = Environment(BUILDERS={'Bld':builder},PREF="LIB",SUFF=".FOO")
        r = builder.get_name(env)
        assert r == 'Bld', r
        r = builder.get_prefix(env)
        assert r == 'LIB', r
        r = builder.get_suffix(env)
        assert r == '.FOO', r

        builder = SCons.Builder.Builder(prefix={None:'A_',
                                                '.C':'E_'},
                                        suffix={None:'.B',
                                                '.C':'.D'})

        env = Environment(BUILDERS={'Bld':builder})
        r = builder.get_name(env)
        assert r == 'Bld', r
        r = builder.get_prefix(env)
        assert r == 'A_', r
        r = builder.get_suffix(env)
        assert r == '.B', r
        r = builder.get_prefix(env, ['X.C'])
        assert r == 'E_', r
        r = builder.get_suffix(env, ['X.C'])
        assert r == '.D', r

        builder = SCons.Builder.Builder(prefix='A_', suffix={}, action={})

        env = Environment(BUILDERS={'Bld':builder})
        r = builder.get_name(env)
        assert r == 'Bld', r
        r = builder.get_prefix(env)
        assert r == 'A_', r
        r = builder.get_suffix(env)
        assert r == None, r
        r = builder.get_src_suffix(env)
        assert r == '', r
        r = builder.src_suffixes(env)
        assert r == [], r

        # Builder actions can be a string, a list, or a dictionary
        # whose keys are the source suffix.  The add_action()
        # specifies a new source suffix/action binding.

        builder.add_action('.src_sfx1', 'FOO')
        r = builder.get_name(env)
        assert r == 'Bld', r
        r = builder.get_prefix(env)
        assert r == 'A_', r
        r = builder.get_suffix(env)
        assert r == None, r
        r = builder.get_suffix(env, ['X.src_sfx1'])
        assert r == None, r
        r = builder.get_src_suffix(env)
        assert r == '.src_sfx1', r
        r = builder.src_suffixes(env)
        assert r == ['.src_sfx1'], r

        builder.add_action('.src_sfx2', 'BAR')

        r = builder.get_name(env)
        assert r == 'Bld', r
        r = builder.get_prefix(env)
        assert r == 'A_', r
        r = builder.get_suffix(env)
        assert r ==  None, r
        r = builder.get_src_suffix(env)
        assert r == '.src_sfx1', r
        r = builder.src_suffixes(env)
        assert r == ['.src_sfx1', '.src_sfx2'], r


    def test_Builder_Args(self):
        """Testing passing extra args to a builder."""
        def buildFunc(target, source, env, s=self):
            s.foo=env['foo']
            s.bar=env['bar']
            assert env['CC'] == 'mycc'

        env=Environment(CC='cc')

        builder = SCons.Builder.Builder(action=buildFunc)
        tgt = builder(env, target='foo', source='bar', foo=1, bar=2, CC='mycc')[0]
        tgt.build()
        assert self.foo == 1, self.foo
        assert self.bar == 2, self.bar

    def test_emitter(self):
        """Test emitter functions."""
        def emit(target, source, env):
            foo = env.get('foo', 0)
            bar = env.get('bar', 0)
            for t in target:
                assert isinstance(t, MyNode)
                assert t.has_builder()
            for s in source:
                assert isinstance(s, MyNode)
            if foo:
                target.append("bar%d"%foo)
            if bar:
                source.append("baz")
            return ( target, source )

        env = Environment()
        builder = SCons.Builder.Builder(action='foo',
                                        emitter=emit,
                                        target_factory=MyNode,
                                        source_factory=MyNode)
        tgt = builder(env, target='foo2', source='bar')[0]
        assert str(tgt) == 'foo2', str(tgt)
        assert str(tgt.sources[0]) == 'bar', str(tgt.sources[0])

        tgt = builder(env, target='foo3', source='bar', foo=1)
        assert len(tgt) == 2, len(tgt)
        assert 'foo3' in map(str, tgt), map(str, tgt)
        assert 'bar1' in map(str, tgt), map(str, tgt)

        tgt = builder(env, target='foo4', source='bar', bar=1)[0]
        assert str(tgt) == 'foo4', str(tgt)
        assert len(tgt.sources) == 2, len(tgt.sources)
        assert 'baz' in map(str, tgt.sources), map(str, tgt.sources)
        assert 'bar' in map(str, tgt.sources), map(str, tgt.sources)

        env2=Environment(FOO=emit)
        builder2=SCons.Builder.Builder(action='foo',
                                       emitter="$FOO",
                                       target_factory=MyNode,
                                       source_factory=MyNode)

        tgt = builder2(env2, target='foo5', source='bar')[0]
        assert str(tgt) == 'foo5', str(tgt)
        assert str(tgt.sources[0]) == 'bar', str(tgt.sources[0])

        tgt = builder2(env2, target='foo6', source='bar', foo=2)
        assert len(tgt) == 2, len(tgt)
        assert 'foo6' in map(str, tgt), map(str, tgt)
        assert 'bar2' in map(str, tgt), map(str, tgt)

        tgt = builder2(env2, target='foo7', source='bar', bar=1)[0]
        assert str(tgt) == 'foo7', str(tgt)
        assert len(tgt.sources) == 2, len(tgt.sources)
        assert 'baz' in map(str, tgt.sources), map(str, tgt.sources)
        assert 'bar' in map(str, tgt.sources), map(str, tgt.sources)

        builder2a=SCons.Builder.Builder(action='foo',
                                        emitter="$FOO",
                                        target_factory=MyNode,
                                        source_factory=MyNode)
        assert builder2 == builder2a, repr(builder2.__dict__) + "\n" + repr(builder2a.__dict__)

        # Test that, if an emitter sets a builder on the passed-in
        # targets and passes back new targets, the new builder doesn't
        # get overwritten.
        new_builder = SCons.Builder.Builder(action='new')
        node = MyNode('foo8')
        new_node = MyNode('foo8.new')
        def emit3(target, source, env, nb=new_builder, nn=new_node):
            for t in target:
                t.builder = nb
            return [nn], source
            
        builder3=SCons.Builder.Builder(action='foo',
                                       emitter=emit3,
                                       target_factory=MyNode,
                                       source_factory=MyNode)
        tgt = builder3(env, target=node, source='bar')[0]
        assert tgt is new_node, tgt
        assert tgt.builder is builder3, tgt.builder
        assert node.builder is new_builder, node.builder

        # Test use of a dictionary mapping file suffixes to
        # emitter functions
        def emit4a(target, source, env):
            source = map(str, source)
            target = map(lambda x: 'emit4a-' + x[:-3], source)
            return (target, source)
        def emit4b(target, source, env):
            source = map(str, source)
            target = map(lambda x: 'emit4b-' + x[:-3], source)
            return (target, source)
        builder4 = SCons.Builder.Builder(action='foo',
                                         emitter={'.4a':emit4a,
                                                  '.4b':emit4b},
                                         target_factory=MyNode,
                                         source_factory=MyNode)
        tgt = builder4(env, source='aaa.4a')[0]
        assert str(tgt) == 'emit4a-aaa', str(tgt)
        tgt = builder4(env, source='bbb.4b')[0]
        assert str(tgt) == 'emit4b-bbb', str(tgt)
        tgt = builder4(env, source='ccc.4c')[0]
        assert str(tgt) == 'ccc', str(tgt)

        def emit4c(target, source, env):
            source = map(str, source)
            target = map(lambda x: 'emit4c-' + x[:-3], source)
            return (target, source)
        builder4.add_emitter('.4c', emit4c)
        tgt = builder4(env, source='ccc.4c')[0]
        assert str(tgt) == 'emit4c-ccc', str(tgt)

        # Test a list of emitter functions.
        def emit5a(target, source, env):
            source = map(str, source)
            target = target + map(lambda x: 'emit5a-' + x[:-2], source)
            return (target, source)
        def emit5b(target, source, env):
            source = map(str, source)
            target = target + map(lambda x: 'emit5b-' + x[:-2], source)
            return (target, source)
        builder5 = SCons.Builder.Builder(action='foo',
                                         emitter=[emit5a, emit5b],
                                         node_factory=MyNode)

        tgts = builder5(env, target='target-5', source='aaa.5')
        tgts = map(str, tgts)
        assert tgts == ['target-5', 'emit5a-aaa', 'emit5b-aaa'], tgts

        # Test a list of emitter functions through the environment.
        def emit6a(target, source, env):
            source = map(str, source)
            target = target + map(lambda x: 'emit6a-' + x[:-2], source)
            return (target, source)
        def emit6b(target, source, env):
            source = map(str, source)
            target = target + map(lambda x: 'emit6b-' + x[:-2], source)
            return (target, source)
        builder6 = SCons.Builder.Builder(action='foo',
                                         emitter='$EMITTERLIST',
                                         node_factory=MyNode)
                                         
        env = Environment(EMITTERLIST = [emit6a, emit6b])

        tgts = builder6(env, target='target-6', source='aaa.6')
        tgts = map(str, tgts)
        assert tgts == ['target-6', 'emit6a-aaa', 'emit6b-aaa'], tgts

    def test_no_target(self):
        """Test deducing the target from the source."""

        env = Environment()
        b = SCons.Builder.Builder(action='foo', suffix='.o')

        tgt = b(env, 'aaa')[0]
        assert str(tgt) == 'aaa.o', str(tgt)
        assert len(tgt.sources) == 1, map(str, tgt.sources)
        assert str(tgt.sources[0]) == 'aaa', map(str, tgt.sources)

        tgt = b(env, 'bbb.c')[0]
        assert str(tgt) == 'bbb.o', str(tgt)
        assert len(tgt.sources) == 1, map(str, tgt.sources)
        assert str(tgt.sources[0]) == 'bbb.c', map(str, tgt.sources)

        tgt = b(env, 'ccc.x.c')[0]
        assert str(tgt) == 'ccc.x.o', str(tgt)
        assert len(tgt.sources) == 1, map(str, tgt.sources)
        assert str(tgt.sources[0]) == 'ccc.x.c', map(str, tgt.sources)

        tgt = b(env, ['d0.c', 'd1.c'])[0]
        assert str(tgt) == 'd0.o', str(tgt)
        assert len(tgt.sources) == 2,  map(str, tgt.sources)
        assert str(tgt.sources[0]) == 'd0.c', map(str, tgt.sources)
        assert str(tgt.sources[1]) == 'd1.c', map(str, tgt.sources)

        tgt = b(env, source='eee')[0]
        assert str(tgt) == 'eee.o', str(tgt)
        assert len(tgt.sources) == 1, map(str, tgt.sources)
        assert str(tgt.sources[0]) == 'eee', map(str, tgt.sources)

        tgt = b(env, source='fff.c')[0]
        assert str(tgt) == 'fff.o', str(tgt)
        assert len(tgt.sources) == 1, map(str, tgt.sources)
        assert str(tgt.sources[0]) == 'fff.c', map(str, tgt.sources)

        tgt = b(env, source='ggg.x.c')[0]
        assert str(tgt) == 'ggg.x.o', str(tgt)
        assert len(tgt.sources) == 1, map(str, tgt.sources)
        assert str(tgt.sources[0]) == 'ggg.x.c', map(str, tgt.sources)

        tgt = b(env, source=['h0.c', 'h1.c'])[0]
        assert str(tgt) == 'h0.o', str(tgt)
        assert len(tgt.sources) == 2,  map(str, tgt.sources)
        assert str(tgt.sources[0]) == 'h0.c', map(str, tgt.sources)
        assert str(tgt.sources[1]) == 'h1.c', map(str, tgt.sources)

        w = b(env, target='i0.w', source=['i0.x'])[0]
        y = b(env, target='i1.y', source=['i1.z'])[0]
        tgt = b(env, source=[w, y])[0]
        assert str(tgt) == 'i0.o', str(tgt)
        assert len(tgt.sources) == 2, map(str, tgt.sources)
        assert str(tgt.sources[0]) == 'i0.w', map(str, tgt.sources)
        assert str(tgt.sources[1]) == 'i1.y', map(str, tgt.sources)

    def test_get_name(self):
        """Test getting name of builder.

        Each type of builder should return its environment-specific
        name when queried appropriately.  """

        b1 = SCons.Builder.Builder(action='foo', suffix='.o')
        b2 = SCons.Builder.Builder(action='foo', suffix='.c')
        b3 = SCons.Builder.MultiStepBuilder(action='bar',
                                            src_suffix = '.foo',
                                            src_builder = b1)
        b4 = SCons.Builder.Builder(action={})
        b5 = SCons.Builder.Builder(action='foo', name='builder5')
        b6 = SCons.Builder.Builder(action='foo')
        assert isinstance(b4, SCons.Builder.CompositeBuilder)
        assert isinstance(b4.action, SCons.Action.CommandGeneratorAction)
        
        env = Environment(BUILDERS={'bldr1': b1,
                                    'bldr2': b2,
                                    'bldr3': b3,
                                    'bldr4': b4})
        env2 = Environment(BUILDERS={'B1': b1,
                                     'B2': b2,
                                     'B3': b3,
                                     'B4': b4})
        assert b1.get_name(env) == 'bldr1', b1.get_name(env)
        assert b2.get_name(env) == 'bldr2', b2.get_name(env)
        assert b3.get_name(env) == 'bldr3', b3.get_name(env)
        assert b4.get_name(env) == 'bldr4', b4.get_name(env)
        assert b5.get_name(env) == 'builder5', b5.get_name(env)
        assert b6.get_name(env) == 'SCons.Builder.BuilderBase', b6.get_name(env)
        assert b1.get_name(env2) == 'B1', b1.get_name(env2)
        assert b2.get_name(env2) == 'B2', b2.get_name(env2)
        assert b3.get_name(env2) == 'B3', b3.get_name(env2)
        assert b4.get_name(env2) == 'B4', b4.get_name(env2)
        assert b5.get_name(env2) == 'builder5', b5.get_name(env2)
        assert b6.get_name(env2) == 'SCons.Builder.BuilderBase', b6.get_name(env2)

        for B in b3.get_src_builders(env):
            assert B.get_name(env) == 'bldr1'
        for B in b3.get_src_builders(env2):
            assert B.get_name(env2) == 'B1'

        tgts = b1(env, target = [outfile, outfile2], source='moo')
        for t in tgts:
            assert t.builder.get_name(env) == 'ListBuilder(bldr1)'
            # The following are not symbolically correct, because the
            # ListBuilder was only created on behalf of env, so it
            # would probably be OK if better correctness
            # env-to-builder mappings caused this to fail in the
            # future.
            assert t.builder.get_name(env2) == 'ListBuilder(B1)'

        tgt = b4(env, target = 'moo', source='cow')
        assert tgt[0].builder.get_name(env) == 'bldr4'

if __name__ == "__main__":
    suite = unittest.makeSuite(BuilderTestCase, 'test_')
    if not unittest.TextTestRunner().run(suite).wasSuccessful():
        sys.exit(1)


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