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Interpolate environment variables

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Signed-off-by: Aanand Prasad <aanand.prasad@gmail.com>
This commit is contained in:
Aanand Prasad 2015-07-24 15:58:18 +01:00
commit 8b5bd945d0
9 changed files with 235 additions and 35 deletions
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tests/unit/interpolation_test.py Normal file
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import unittest
from compose.config.interpolation import interpolate, InvalidInterpolation
class InterpolationTest(unittest.TestCase):
def test_valid_interpolations(self):
self.assertEqual(interpolate('$foo', dict(foo='hi')), 'hi')
self.assertEqual(interpolate('${foo}', dict(foo='hi')), 'hi')
self.assertEqual(interpolate('${subject} love you', dict(subject='i')), 'i love you')
self.assertEqual(interpolate('i ${verb} you', dict(verb='love')), 'i love you')
self.assertEqual(interpolate('i love ${object}', dict(object='you')), 'i love you')
def test_empty_value(self):
self.assertEqual(interpolate('${foo}', dict(foo='')), '')
def test_unset_value(self):
self.assertEqual(interpolate('${foo}', dict()), '')
def test_escaped_interpolation(self):
self.assertEqual(interpolate('$${foo}', dict(foo='hi')), '${foo}')
def test_invalid_strings(self):
self.assertRaises(InvalidInterpolation, lambda: interpolate('${', dict()))
self.assertRaises(InvalidInterpolation, lambda: interpolate('$}', dict()))
self.assertRaises(InvalidInterpolation, lambda: interpolate('${}', dict()))
self.assertRaises(InvalidInterpolation, lambda: interpolate('${ }', dict()))
self.assertRaises(InvalidInterpolation, lambda: interpolate('${ foo}', dict()))
self.assertRaises(InvalidInterpolation, lambda: interpolate('${foo }', dict()))
self.assertRaises(InvalidInterpolation, lambda: interpolate('${foo!}', dict()))