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path: root/contrib/tools/cython/Cython/Tests/TestCodeWriter.py
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from Cython.TestUtils import CythonTest 
 
class TestCodeWriter(CythonTest): 
    # CythonTest uses the CodeWriter heavily, so do some checking by 
    # roundtripping Cython code through the test framework. 
 
    # Note that this test is dependent upon the normal Cython parser
    # to generate the input trees to the CodeWriter. This save *a lot* 
    # of time; better to spend that time writing other tests than perfecting 
    # this one... 
 
    # Whitespace is very significant in this process: 
    #  - always newline on new block (!) 
    #  - indent 4 spaces 
    #  - 1 space around every operator 
 
    def t(self, codestr): 
        self.assertCode(codestr, self.fragment(codestr).root) 
 
    def test_print(self): 
        self.t(u""" 
                    print x, y 
                    print x + y ** 2 
                    print x, y, z, 
               """) 
 
    def test_if(self): 
        self.t(u"if x:\n    pass") 
 
    def test_ifelifelse(self): 
        self.t(u""" 
                    if x: 
                        pass 
                    elif y: 
                        pass 
                    elif z + 34 ** 34 - 2: 
                        pass 
                    else: 
                        pass 
                """) 
 
    def test_def(self): 
        self.t(u""" 
                    def f(x, y, z): 
                        pass 
                    def f(x = 34, y = 54, z): 
                        pass 
               """) 
 
    def test_longness_and_signedness(self): 
        self.t(u"def f(unsigned long long long long long int y):\n    pass") 
 
    def test_signed_short(self): 
        self.t(u"def f(signed short int y):\n    pass") 
 
    def test_typed_args(self): 
        self.t(u"def f(int x, unsigned long int y):\n    pass") 
 
    def test_cdef_var(self): 
        self.t(u""" 
                    cdef int hello 
                    cdef int hello = 4, x = 3, y, z 
                """) 
 
    def test_for_loop(self): 
        self.t(u""" 
                    for x, y, z in f(g(h(34) * 2) + 23): 
                        print x, y, z 
                    else: 
                        print 43 
                """) 
 
    def test_inplace_assignment(self): 
        self.t(u"x += 43") 
 
    def test_attribute(self): 
        self.t(u"a.x") 
 
if __name__ == "__main__": 
    import unittest 
    unittest.main()