[jsinterp] Mozilla-central test first try
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@ -547,6 +547,31 @@ class TestJSInterpreterParser(unittest.TestCase):
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]
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self.assertEqual(list(jsi.statements()), ast)
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def test_unshift(self):
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# https://hg.mozilla.org/mozilla-central/file/tip/js/src/tests/ecma_5/Array/unshift-01.js
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jsi = JSInterpreter(
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'''var MAX_LENGTH = 0xffffffff;
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var a = {};
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a.length = MAX_LENGTH + 1;
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assertEq([].unshift.call(a), MAX_LENGTH);
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assertEq(a.length, MAX_LENGTH);
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function testGetSet(len, expected) {
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var newlen;
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var a = { get length() { return len; }, set length(v) { newlen = v; } };
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var res = [].unshift.call(a);
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assertEq(res, expected);
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assertEq(newlen, expected);
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}
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testGetSet(0, 0);
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testGetSet(10, 10);
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testGetSet("1", 1);
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testGetSet(null, 0);
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testGetSet(MAX_LENGTH + 2, MAX_LENGTH);
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testGetSet(-5, 0);''')
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jsi.statements()
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if __name__ == '__main__':
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unittest.main()
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