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import os
import unittest

import SCons.Tool.javac

class pathoptTestCase(unittest.TestCase):
    def assert_pathopt(self, expect, path):
        popt = SCons.Tool.javac.pathopt('-foopath', 'FOOPATH')
        env = {'FOOPATH': path}
        actual = popt(None, None, env, None)
        self.assertEquals(expect, actual)

    def test_unset(self):
        self.assert_pathopt([], None)
        self.assert_pathopt([], '')

    def test_str(self):
        self.assert_pathopt(['-foopath', '/foo/bar'],
                            '/foo/bar')

    def test_list_str(self):
        self.assert_pathopt(['-foopath', '/foo%s/bar' % os.pathsep],
                            ['/foo', '/bar'])

    def test_uses_pathsep(self):
        save = os.pathsep
        try:
            os.pathsep = '!'
            self.assert_pathopt(['-foopath', 'foo!bar'],
                                ['foo', 'bar'])
        finally:
            os.pathsep = save

    def test_default(self):
        popt = SCons.Tool.javac.pathopt('-foopath', 'FOOPATH', default='DPATH')
        env = {'FOOPATH': ['/foo', '/bar'],
               'DPATH': '/baz'}

        expect = ['-foopath', os.pathsep.join(['/foo', '/bar', '/baz'])]
        actual = popt(None, None, env, None)
        self.assertEquals(expect, actual)

if __name__ == "__main__":
    unittest.main()

Add unit tests for SCons.Tool.javac (pathopt class only). This carefully avoids known bugs in order to have passing tests.
Add unit tests for SCons.Tool.javac (pathopt class only).
This carefully avoids known bugs in order to have passing tests.
