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

"""
Verify use of an up-to-date Decider method on a Node.
"""

import TestSCons

test = TestSCons.TestSCons()

test.write('SConstruct', """
import os.path
file_in = File('file.in')
file_out = File('file.out')
Command(file_out, file_in, Copy('$TARGET', '$SOURCE'))
def my_decider(dependency, target, prev_ni):
    return os.path.exists('has-changed')
file_in.Decider(my_decider)
""")

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

test.run(arguments = '.')

test.up_to_date(arguments = '.')

test.write('has-changed', "\n")

test.not_up_to_date(arguments = '.')

test.not_up_to_date(arguments = '.')

test.unlink('has-changed')

test.up_to_date(arguments = '.')

test.pass_test()