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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

import sys
import unittest

import TestUnit

import SCons.Warnings

class TestOutput(object):
    def __call__(self, x):
        args = x.args[0]
        if len(args) == 1:
            args = args[0]
        self.out = str(args)

class WarningsTestCase(unittest.TestCase):
    def test_Warning(self):
        """Test warn function."""

        # Reset global state
        SCons.Warnings._enabled = []
        SCons.Warnings._warningAsException = 0
        
        to = TestOutput()
        SCons.Warnings._warningOut=to
        SCons.Warnings.enableWarningClass(SCons.Warnings.Warning)
        SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
                            "Foo")
        assert to.out == "Foo", to.out
        SCons.Warnings.warn(SCons.Warnings.DependencyWarning,
                            "Foo", 1)
        assert to.out == "('Foo', 1)", to.out

    def test_WarningAsExc(self):
        """Test warnings as exceptions."""
        
        # Reset global state
        SCons.Warnings._enabled = []
        SCons.Warnings._warningAsException = 0

        SCons.Warnings.enableWarningClass(SCons.Warnings.Warning)
        old = SCons.Warnings.warningAsException()
        assert old == 0, old
        exc_caught = 0
        try:
            SCons.Warnings.warn(SCons.Warnings.Warning, "Foo")
        except:
            exc_caught = 1
        assert exc_caught == 1

        old = SCons.Warnings.warningAsException(old)
        assert old == 1, old
        exc_caught = 0
        try:
            SCons.Warnings.warn(SCons.Warnings.Warning, "Foo")
        except:
            exc_caught = 1
        assert exc_caught == 0

    def test_Disable(self):
        """Test disabling/enabling warnings."""

        # Reset global state
        SCons.Warnings._enabled = []
        SCons.Warnings._warningAsException = 0

        to = TestOutput()
        SCons.Warnings._warningOut=to
        to.out = None

        # No warnings by default
        SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
                            "Foo")
        assert to.out is None, to.out

        SCons.Warnings.enableWarningClass(SCons.Warnings.Warning)
        SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
                            "Foo")
        assert to.out == "Foo", to.out

        to.out = None
        SCons.Warnings.suppressWarningClass(SCons.Warnings.DeprecatedWarning)
        SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
                            "Foo")
        assert to.out is None, to.out

        SCons.Warnings.warn(SCons.Warnings.MandatoryDeprecatedWarning,
                            "Foo")
        assert to.out is None, to.out

        # Dependency warnings should still be enabled though
        SCons.Warnings.enableWarningClass(SCons.Warnings.Warning)
        SCons.Warnings.warn(SCons.Warnings.DependencyWarning,
                            "Foo")
        assert to.out == "Foo", to.out

        # Try reenabling all warnings...
        SCons.Warnings.enableWarningClass(SCons.Warnings.Warning)

        SCons.Warnings.enableWarningClass(SCons.Warnings.Warning)
        SCons.Warnings.warn(SCons.Warnings.DeprecatedWarning,
                            "Foo")
        assert to.out == "Foo", to.out

if __name__ == "__main__":
    suite = unittest.makeSuite(WarningsTestCase, 'test_')
    TestUnit.run(suite)

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