#!/usr/bin/env python
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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

"""
Test that switching SourceSignature() types no longer causes rebuilds.
"""

import TestSCons

test = TestSCons.TestSCons()


base_sconstruct_contents = """\
SourceSignatures('%s')

def build(env, target, source):
    open(str(target[0]), 'wt').write(open(str(source[0]), 'rt').read())
B = Builder(action = build)
env = Environment(BUILDERS = { 'B' : B })
env.B(target = 'switch.out', source = 'switch.in')
"""

def write_SConstruct(test, sig_type):
    contents = base_sconstruct_contents % sig_type
    test.write('SConstruct', contents)


write_SConstruct(test, 'MD5')

test.write('switch.in', "switch.in\n")

switch_out_switch_in = test.wrap_stdout('build(["switch.out"], ["switch.in"])\n')

test.run(arguments = 'switch.out', stdout = switch_out_switch_in)

test.up_to_date(arguments = 'switch.out')



write_SConstruct(test, 'timestamp')

test.up_to_date(arguments = 'switch.out')



write_SConstruct(test, 'MD5')

test.not_up_to_date(arguments = 'switch.out')



test.write('switch.in', "switch.in 2\n")

test.run(arguments = 'switch.out', stdout = switch_out_switch_in)



test.pass_test()