# Python test set -- part 6, built-in types # from test.support import run_with_locale # import collections.abc # import inspect # import pickle # import locale import sys import types # import unittest.mock # import weakref import unittest class TypesTests(unittest.TestCase): def test_truth_values(self): if None: self.fail('None is true instead of false') if 0: self.fail('0 is true instead of false') if 0.0: self.fail('0.0 is true instead of false') if '': self.fail('\'\' is true instead of false') if not 1: self.fail('1 is false instead of true') if not 1.0: self.fail('1.0 is false instead of true') if not 'x': self.fail('\'x\' is false instead of true') if not {'x': 1}: self.fail('{\'x\': 1} is false instead of true') def f(): pass class C: pass x = C() if not f: self.fail('f is false instead of true') if not C: self.fail('C is false instead of true') if not sys: self.fail('sys is false instead of true') if not x: self.fail('x is false instead of true') def test_boolean_ops(self): if 0 or 0: self.fail('0 or 0 is true instead of false') if 1 and 1: pass else: self.fail('1 and 1 is false instead of true') if not 1: self.fail('not 1 is true instead of false') def test_comparisons(self): if 0 < 1 <= 1 == 1 >= 1 > 0 != 1: pass else: self.fail('int comparisons failed') if 0.0 < 1.0 <= 1.0 == 1.0 >= 1.0 > 0.0 != 1.0: pass else: self.fail('float comparisons failed') if '' < 'a' <= 'a' == 'a' < 'abc' < 'abd' < 'b': pass else: self.fail('string comparisons failed') if None is None: pass else: self.fail('identity test failed') def test_float_constructor(self): self.assertRaises(ValueError, float, '') self.assertRaises(ValueError, float, '5\0') self.assertRaises(ValueError, float, '5_5\0') def test_zero_division(self): try: 5.0 / 0.0 except ZeroDivisionError: pass else: self.fail("5.0 / 0.0 didn't raise ZeroDivisionError") try: 5.0 // 0.0 except ZeroDivisionError: pass else: self.fail("5.0 // 0.0 didn't raise ZeroDivisionError") try: 5.0 % 0.0 except ZeroDivisionError: pass else: self.fail("5.0 % 0.0 didn't raise ZeroDivisionError") try: 5 / 0 except ZeroDivisionError: pass else: self.fail("5 / 0 didn't raise ZeroDivisionError") try: 5 // 0 except ZeroDivisionError: pass else: self.fail("5 // 0 didn't raise ZeroDivisionError") try: 5 % 0 except ZeroDivisionError: pass else: self.fail("5 % 0 didn't raise ZeroDivisionError") def test_numeric_types(self): if 0 != 0.0 or 1 != 1.0 or -1 != -1.0: self.fail('int/float value not equal') # calling built-in types without argument must return 0 if int() != 0: self.fail('int() does not return 0') if float() != 0.0: self.fail('float() does not return 0.0') if int(1.9) == 1 == int(1.1) and int(-1.1) == -1 == int(-1.9): pass else: self.fail('int() does not round properly') if float(1) == 1.0 and float(-1) == -1.0 and float(0) == 0.0: pass else: self.fail('float() does not work properly') # def test_float_to_string(self): # def test(f, result): # self.assertEqual(f.__format__('e'), result) # self.assertEqual('%e' % f, result) # # test all 2 digit exponents, both with __format__ and with # # '%' formatting # for i in range(-99, 100): # test(float('1.5e'+str(i)), '1.500000e{0:+03d}'.format(i)) # # test some 3 digit exponents # self.assertEqual(1.5e100.__format__('e'), '1.500000e+100') # self.assertEqual('%e' % 1.5e100, '1.500000e+100') # self.assertEqual(1.5e101.__format__('e'), '1.500000e+101') # self.assertEqual('%e' % 1.5e101, '1.500000e+101') # self.assertEqual(1.5e-100.__format__('e'), '1.500000e-100') # self.assertEqual('%e' % 1.5e-100, '1.500000e-100') # self.assertEqual(1.5e-101.__format__('e'), '1.500000e-101') # self.assertEqual('%e' % 1.5e-101, '1.500000e-101') # self.assertEqual('%g' % 1.0, '1') # self.assertEqual('%#g' % 1.0, '1.00000') def test_normal_integers(self): # Ensure the first 256 integers are shared a = 256 b = 128*2 if a is not b: self.fail('256 is not shared') if 12 + 24 != 36: self.fail('int op') if 12 + (-24) != -12: self.fail('int op') if (-12) + 24 != 12: self.fail('int op') if (-12) + (-24) != -36: self.fail('int op') if not 12 < 24: self.fail('int op') if not -24 < -12: self.fail('int op') # Test for a particular bug in integer multiply xsize, ysize, zsize = 238, 356, 4 if not (xsize*ysize*zsize == zsize*xsize*ysize == 338912): self.fail('int mul commutativity') # And another. m = -sys.maxsize - 1 for divisor in 1, 2, 4, 8, 16, 32: j = m // divisor prod = divisor * j if prod != m: self.fail("%r * %r == %r != %r" % (divisor, j, prod, m)) if type(prod) is not int: self.fail("expected type(prod) to be int, not %r" % type(prod)) # Check for unified integral type for divisor in 1, 2, 4, 8, 16, 32: j = m // divisor - 1 prod = divisor * j if type(prod) is not int: self.fail("expected type(%r) to be int, not %r" % (prod, type(prod))) # Check for unified integral type m = sys.maxsize for divisor in 1, 2, 4, 8, 16, 32: j = m // divisor + 1 prod = divisor * j if type(prod) is not int: self.fail("expected type(%r) to be int, not %r" % (prod, type(prod))) x = sys.maxsize self.assertIsInstance(x + 1, int, "(sys.maxsize + 1) should have returned int") self.assertIsInstance(-x - 1, int, "(-sys.maxsize - 1) should have returned int") self.assertIsInstance(-x - 2, int, "(-sys.maxsize - 2) should have returned int") try: 5 << -5 except ValueError: pass else: self.fail('int negative shift <<') try: 5 >> -5 except ValueError: pass else: self.fail('int negative shift >>') def test_floats(self): if 12.0 + 24.0 != 36.0: self.fail('float op') if 12.0 + (-24.0) != -12.0: self.fail('float op') if (-12.0) + 24.0 != 12.0: self.fail('float op') if (-12.0) + (-24.0) != -36.0: self.fail('float op') if not 12.0 < 24.0: self.fail('float op') if not -24.0 < -12.0: self.fail('float op') def test_strings(self): if len('') != 0: self.fail('len(\'\')') if len('a') != 1: self.fail('len(\'a\')') if len('abcdef') != 6: self.fail('len(\'abcdef\')') if 'xyz' + 'abcde' != 'xyzabcde': self.fail('string concatenation') if 'xyz'*3 != 'xyzxyzxyz': self.fail('string repetition *3') if 0*'abcde' != '': self.fail('string repetition 0*') if min('abc') != 'a' or max('abc') != 'c': self.fail('min/max string') if 'a' in 'abc' and 'b' in 'abc' and 'c' in 'abc' and 'd' not in 'abc': pass else: self.fail('in/not in string') x = 'x'*103 if '%s!'%x != x+'!': self.fail('nasty string formatting bug') #extended slices for strings a = '0123456789' self.assertEqual(a[::], a) self.assertEqual(a[::2], '02468') self.assertEqual(a[1::2], '13579') self.assertEqual(a[::-1],'9876543210') self.assertEqual(a[::-2], '97531') self.assertEqual(a[3::-2], '31') self.assertEqual(a[-100:100:], a) self.assertEqual(a[100:-100:-1], a[::-1]) self.assertEqual(a[-100:100:2], '02468') def test_type_function(self): self.assertRaises(TypeError, type, 1, 2) self.assertRaises(TypeError, type, 1, 2, 3, 4) # def test_int__format__(self): # def test(i, format_spec, result): # # just make sure we have the unified type for integers # assert type(i) == int # assert type(format_spec) == str # self.assertEqual(i.__format__(format_spec), result) # test(123456789, 'd', '123456789') # test(123456789, 'd', '123456789') # test(1, 'c', '\01') # # sign and aligning are interdependent # test(1, "-", '1') # test(-1, "-", '-1') # test(1, "-3", ' 1') # test(-1, "-3", ' -1') # test(1, "+3", ' +1') # test(-1, "+3", ' -1') # test(1, " 3", ' 1') # test(-1, " 3", ' -1') # test(1, " ", ' 1') # test(-1, " ", '-1') # # hex # test(3, "x", "3") # test(3, "X", "3") # test(1234, "x", "4d2") # test(-1234, "x", "-4d2") # test(1234, "8x", " 4d2") # test(-1234, "8x", " -4d2") # test(1234, "x", "4d2") # test(-1234, "x", "-4d2") # test(-3, "x", "-3") # test(-3, "X", "-3") # test(int('be', 16), "x", "be") # test(int('be', 16), "X", "BE") # test(-int('be', 16), "x", "-be") # test(-int('be', 16), "X", "-BE") # # octal # test(3, "o", "3") # test(-3, "o", "-3") # test(65, "o", "101") # test(-65, "o", "-101") # test(1234, "o", "2322") # test(-1234, "o", "-2322") # test(1234, "-o", "2322") # test(-1234, "-o", "-2322") # test(1234, " o", " 2322") # test(-1234, " o", "-2322") # test(1234, "+o", "+2322") # test(-1234, "+o", "-2322") # # binary # test(3, "b", "11") # test(-3, "b", "-11") # test(1234, "b", "10011010010") # test(-1234, "b", "-10011010010") # test(1234, "-b", "10011010010") # test(-1234, "-b", "-10011010010") # test(1234, " b", " 10011010010") # test(-1234, " b", "-10011010010") # test(1234, "+b", "+10011010010") # test(-1234, "+b", "-10011010010") # # alternate (#) formatting # test(0, "#b", '0b0') # test(0, "-#b", '0b0') # test(1, "-#b", '0b1') # test(-1, "-#b", '-0b1') # test(-1, "-#5b", ' -0b1') # test(1, "+#5b", ' +0b1') # test(100, "+#b", '+0b1100100') # test(100, "#012b", '0b0001100100') # test(-100, "#012b", '-0b001100100') # test(0, "#o", '0o0') # test(0, "-#o", '0o0') # test(1, "-#o", '0o1') # test(-1, "-#o", '-0o1') # test(-1, "-#5o", ' -0o1') # test(1, "+#5o", ' +0o1') # test(100, "+#o", '+0o144') # test(100, "#012o", '0o0000000144') # test(-100, "#012o", '-0o000000144') # test(0, "#x", '0x0') # test(0, "-#x", '0x0') # test(1, "-#x", '0x1') # test(-1, "-#x", '-0x1') # test(-1, "-#5x", ' -0x1') # test(1, "+#5x", ' +0x1') # test(100, "+#x", '+0x64') # test(100, "#012x", '0x0000000064') # test(-100, "#012x", '-0x000000064') # test(123456, "#012x", '0x000001e240') # test(-123456, "#012x", '-0x00001e240') # test(0, "#X", '0X0') # test(0, "-#X", '0X0') # test(1, "-#X", '0X1') # test(-1, "-#X", '-0X1') # test(-1, "-#5X", ' -0X1') # test(1, "+#5X", ' +0X1') # test(100, "+#X", '+0X64') # test(100, "#012X", '0X0000000064') # test(-100, "#012X", '-0X000000064') # test(123456, "#012X", '0X000001E240') # test(-123456, "#012X", '-0X00001E240') # test(123, ',', '123') # test(-123, ',', '-123') # test(1234, ',', '1,234') # test(-1234, ',', '-1,234') # test(123456, ',', '123,456') # test(-123456, ',', '-123,456') # test(1234567, ',', '1,234,567') # test(-1234567, ',', '-1,234,567') # # issue 5782, commas with no specifier type # test(1234, '010,', '00,001,234') # # Unified type for integers # test(10**100, 'd', '1' + '0' * 100) # test(10**100+100, 'd', '1' + '0' * 97 + '100') # # make sure these are errors # # precision disallowed # self.assertRaises(ValueError, 3 .__format__, "1.3") # # sign not allowed with 'c' # self.assertRaises(ValueError, 3 .__format__, "+c") # # format spec must be string # self.assertRaises(TypeError, 3 .__format__, None) # self.assertRaises(TypeError, 3 .__format__, 0) # # can't have ',' with 'n' # self.assertRaises(ValueError, 3 .__format__, ",n") # # can't have ',' with 'c' # self.assertRaises(ValueError, 3 .__format__, ",c") # # can't have '#' with 'c' # self.assertRaises(ValueError, 3 .__format__, "#c") # # ensure that only int and float type specifiers work # for format_spec in ([chr(x) for x in range(ord('a'), ord('z')+1)] + # [chr(x) for x in range(ord('A'), ord('Z')+1)]): # if not format_spec in 'bcdoxXeEfFgGn%': # self.assertRaises(ValueError, 0 .__format__, format_spec) # self.assertRaises(ValueError, 1 .__format__, format_spec) # self.assertRaises(ValueError, (-1) .__format__, format_spec) # # ensure that float type specifiers work; format converts # # the int to a float # for format_spec in 'eEfFgG%': # for value in [0, 1, -1, 100, -100, 1234567890, -1234567890]: # self.assertEqual(value.__format__(format_spec), # float(value).__format__(format_spec)) # # Issue 6902 # test(123456, "0<20", '12345600000000000000') # test(123456, "1<20", '12345611111111111111') # test(123456, "*<20", '123456**************') # test(123456, "0>20", '00000000000000123456') # test(123456, "1>20", '11111111111111123456') # test(123456, "*>20", '**************123456') # test(123456, "0=20", '00000000000000123456') # test(123456, "1=20", '11111111111111123456') # test(123456, "*=20", '**************123456') # @run_with_locale('LC_NUMERIC', 'en_US.UTF8') # def test_float__format__locale(self): # # test locale support for __format__ code 'n' # for i in range(-10, 10): # x = 1234567890.0 * (10.0 ** i) # self.assertEqual(locale.format_string('%g', x, grouping=True), format(x, 'n')) # self.assertEqual(locale.format_string('%.10g', x, grouping=True), format(x, '.10n')) # @run_with_locale('LC_NUMERIC', 'en_US.UTF8') # def test_int__format__locale(self): # # test locale support for __format__ code 'n' for integers # x = 123456789012345678901234567890 # for i in range(0, 30): # self.assertEqual(locale.format_string('%d', x, grouping=True), format(x, 'n')) # # move to the next integer to test # x = x // 10 # rfmt = ">20n" # lfmt = "<20n" # cfmt = "^20n" # for x in (1234, 12345, 123456, 1234567, 12345678, 123456789, 1234567890, 12345678900): # self.assertEqual(len(format(0, rfmt)), len(format(x, rfmt))) # self.assertEqual(len(format(0, lfmt)), len(format(x, lfmt))) # self.assertEqual(len(format(0, cfmt)), len(format(x, cfmt))) # def test_float__format__(self): # def test(f, format_spec, result): # self.assertEqual(f.__format__(format_spec), result) # self.assertEqual(format(f, format_spec), result) # test(0.0, 'f', '0.000000') # # the default is 'g', except for empty format spec # test(0.0, '', '0.0') # test(0.01, '', '0.01') # test(0.01, 'g', '0.01') # # test for issue 3411 # test(1.23, '1', '1.23') # test(-1.23, '1', '-1.23') # test(1.23, '1g', '1.23') # test(-1.23, '1g', '-1.23') # test( 1.0, ' g', ' 1') # test(-1.0, ' g', '-1') # test( 1.0, '+g', '+1') # test(-1.0, '+g', '-1') # test(1.1234e200, 'g', '1.1234e+200') # test(1.1234e200, 'G', '1.1234E+200') # test(1.0, 'f', '1.000000') # test(-1.0, 'f', '-1.000000') # test( 1.0, ' f', ' 1.000000') # test(-1.0, ' f', '-1.000000') # test( 1.0, '+f', '+1.000000') # test(-1.0, '+f', '-1.000000') # # Python versions <= 3.0 switched from 'f' to 'g' formatting for # # values larger than 1e50. No longer. # f = 1.1234e90 # for fmt in 'f', 'F': # # don't do a direct equality check, since on some # # platforms only the first few digits of dtoa # # will be reliable # result = f.__format__(fmt) # self.assertEqual(len(result), 98) # self.assertEqual(result[-7], '.') # self.assertIn(result[:12], ('112340000000', '112339999999')) # f = 1.1234e200 # for fmt in 'f', 'F': # result = f.__format__(fmt) # self.assertEqual(len(result), 208) # self.assertEqual(result[-7], '.') # self.assertIn(result[:12], ('112340000000', '112339999999')) # test( 1.0, 'e', '1.000000e+00') # test(-1.0, 'e', '-1.000000e+00') # test( 1.0, 'E', '1.000000E+00') # test(-1.0, 'E', '-1.000000E+00') # test(1.1234e20, 'e', '1.123400e+20') # test(1.1234e20, 'E', '1.123400E+20') # # No format code means use g, but must have a decimal # # and a number after the decimal. This is tricky, because # # a totally empty format specifier means something else. # # So, just use a sign flag # test(1e200, '+g', '+1e+200') # test(1e200, '+', '+1e+200') # test(1.1e200, '+g', '+1.1e+200') # test(1.1e200, '+', '+1.1e+200') # # 0 padding # test(1234., '010f', '1234.000000') # test(1234., '011f', '1234.000000') # test(1234., '012f', '01234.000000') # test(-1234., '011f', '-1234.000000') # test(-1234., '012f', '-1234.000000') # test(-1234., '013f', '-01234.000000') # test(-1234.12341234, '013f', '-01234.123412') # test(-123456.12341234, '011.2f', '-0123456.12') # # issue 5782, commas with no specifier type # test(1.2, '010,.2', '0,000,001.2') # # 0 padding with commas # test(1234., '011,f', '1,234.000000') # test(1234., '012,f', '1,234.000000') # test(1234., '013,f', '01,234.000000') # test(-1234., '012,f', '-1,234.000000') # test(-1234., '013,f', '-1,234.000000') # test(-1234., '014,f', '-01,234.000000') # test(-12345., '015,f', '-012,345.000000') # test(-123456., '016,f', '-0,123,456.000000') # test(-123456., '017,f', '-0,123,456.000000') # test(-123456.12341234, '017,f', '-0,123,456.123412') # test(-123456.12341234, '013,.2f', '-0,123,456.12') # # % formatting # test(-1.0, '%', '-100.000000%') # # format spec must be string # self.assertRaises(TypeError, 3.0.__format__, None) # self.assertRaises(TypeError, 3.0.__format__, 0) # # other format specifiers shouldn't work on floats, # # in particular int specifiers # for format_spec in ([chr(x) for x in range(ord('a'), ord('z')+1)] + # [chr(x) for x in range(ord('A'), ord('Z')+1)]): # if not format_spec in 'eEfFgGn%': # self.assertRaises(ValueError, format, 0.0, format_spec) # self.assertRaises(ValueError, format, 1.0, format_spec) # self.assertRaises(ValueError, format, -1.0, format_spec) # self.assertRaises(ValueError, format, 1e100, format_spec) # self.assertRaises(ValueError, format, -1e100, format_spec) # self.assertRaises(ValueError, format, 1e-100, format_spec) # self.assertRaises(ValueError, format, -1e-100, format_spec) # # Alternate float formatting # test(1.0, '.0e', '1e+00') # test(1.0, '#.0e', '1.e+00') # test(1.0, '.0f', '1') # test(1.0, '#.0f', '1.') # test(1.1, 'g', '1.1') # test(1.1, '#g', '1.10000') # test(1.0, '.0%', '100%') # test(1.0, '#.0%', '100.%') # # Issue 7094: Alternate formatting (specified by #) # test(1.0, '0e', '1.000000e+00') # test(1.0, '#0e', '1.000000e+00') # test(1.0, '0f', '1.000000' ) # test(1.0, '#0f', '1.000000') # test(1.0, '.1e', '1.0e+00') # test(1.0, '#.1e', '1.0e+00') # test(1.0, '.1f', '1.0') # test(1.0, '#.1f', '1.0') # test(1.0, '.1%', '100.0%') # test(1.0, '#.1%', '100.0%') # # Issue 6902 # test(12345.6, "0<20", '12345.60000000000000') # test(12345.6, "1<20", '12345.61111111111111') # test(12345.6, "*<20", '12345.6*************') # test(12345.6, "0>20", '000000000000012345.6') # test(12345.6, "1>20", '111111111111112345.6') # test(12345.6, "*>20", '*************12345.6') # test(12345.6, "0=20", '000000000000012345.6') # test(12345.6, "1=20", '111111111111112345.6') # test(12345.6, "*=20", '*************12345.6') # def test_format_spec_errors(self): # # int, float, and string all share the same format spec # # mini-language parser. # # Check that we can't ask for too many digits. This is # # probably a CPython specific test. It tries to put the width # # into a C long. # self.assertRaises(ValueError, format, 0, '1'*10000 + 'd') # # Similar with the precision. # self.assertRaises(ValueError, format, 0, '.' + '1'*10000 + 'd') # # And may as well test both. # self.assertRaises(ValueError, format, 0, '1'*1000 + '.' + '1'*10000 + 'd') # # Make sure commas aren't allowed with various type codes # for code in 'xXobns': # self.assertRaises(ValueError, format, 0, ',' + code) # def test_internal_sizes(self): # self.assertGreater(object.__basicsize__, 0) # self.assertGreater(tuple.__itemsize__, 0) def test_slot_wrapper_types(self): self.assertIsInstance(object.__init__, types.WrapperDescriptorType) self.assertIsInstance(object.__str__, types.WrapperDescriptorType) self.assertIsInstance(object.__lt__, types.WrapperDescriptorType) self.assertIsInstance(int.__lt__, types.WrapperDescriptorType) def test_method_wrapper_types(self): self.assertIsInstance(object().__init__, types.MethodWrapperType) self.assertIsInstance(object().__str__, types.MethodWrapperType) self.assertIsInstance(object().__lt__, types.MethodWrapperType) self.assertIsInstance((42).__lt__, types.MethodWrapperType) def test_method_descriptor_types(self): self.assertIsInstance(str.join, types.MethodDescriptorType) self.assertIsInstance(list.append, types.MethodDescriptorType) self.assertIsInstance(''.join, types.BuiltinMethodType) self.assertIsInstance([].append, types.BuiltinMethodType) # self.assertIsInstance(int.__dict__['from_bytes'], types.ClassMethodDescriptorType) # self.assertIsInstance(int.from_bytes, types.BuiltinMethodType) # self.assertIsInstance(int.__new__, types.BuiltinMethodType) class MappingProxyTests(unittest.TestCase): mappingproxy = types.MappingProxyType def test_constructor(self): class userdict(dict): pass mapping = {'x': 1, 'y': 2} self.assertEqual(self.mappingproxy(mapping), mapping) mapping = userdict(x=1, y=2) self.assertEqual(self.mappingproxy(mapping), mapping) # mapping = collections.ChainMap({'x': 1}, {'y': 2}) # self.assertEqual(self.mappingproxy(mapping), mapping) self.assertRaises(TypeError, self.mappingproxy, 10) self.assertRaises(TypeError, self.mappingproxy, ("a", "tuple")) self.assertRaises(TypeError, self.mappingproxy, ["a", "list"]) def test_methods(self): attrs = set(dir(self.mappingproxy({}))) - set(dir(object())) self.assertEqual(attrs, { '__contains__', '__getitem__', # '__class_getitem__', '__ior__', '__iter__', '__len__', '__or__', '__ror__', 'copy', 'get', 'items', 'keys', 'values', }) def test_get(self): view = self.mappingproxy({'a': 'A', 'b': 'B'}) self.assertEqual(view['a'], 'A') self.assertEqual(view['b'], 'B') self.assertRaises(KeyError, view.__getitem__, 'xxx') self.assertEqual(view.get('a'), 'A') self.assertIsNone(view.get('xxx')) self.assertEqual(view.get('xxx', 42), 42) def test_missing(self): class dictmissing(dict): def __missing__(self, key): return "missing=%s" % key view = self.mappingproxy(dictmissing(x=1)) self.assertEqual(view['x'], 1) self.assertEqual(view['y'], 'missing=y') self.assertEqual(view.get('x'), 1) self.assertEqual(view.get('y'), None) self.assertEqual(view.get('y', 42), 42) self.assertTrue('x' in view) self.assertFalse('y' in view) def test_customdict(self): class customdict(dict): def __contains__(self, key): if key == 'magic': return True else: return dict.__contains__(self, key) def __iter__(self): return iter(('iter',)) def __len__(self): return 500 def copy(self): return 'copy' def keys(self): return 'keys' def items(self): return 'items' def values(self): return 'values' def __getitem__(self, key): return "getitem=%s" % dict.__getitem__(self, key) def get(self, key, default=None): return "get=%s" % dict.get(self, key, 'default=%r' % default) custom = customdict({'key': 'value'}) view = self.mappingproxy(custom) self.assertTrue('key' in view) self.assertTrue('magic' in view) self.assertFalse('xxx' in view) self.assertEqual(view['key'], 'getitem=value') self.assertRaises(KeyError, view.__getitem__, 'xxx') self.assertEqual(tuple(view), ('iter',)) self.assertEqual(len(view), 500) self.assertEqual(view.copy(), 'copy') self.assertEqual(view.get('key'), 'get=value') self.assertEqual(view.get('xxx'), 'get=default=None') self.assertEqual(view.items(), 'items') self.assertEqual(view.keys(), 'keys') self.assertEqual(view.values(), 'values') # def test_chainmap(self): # d1 = {'x': 1} # d2 = {'y': 2} # mapping = collections.ChainMap(d1, d2) # view = self.mappingproxy(mapping) # self.assertTrue('x' in view) # self.assertTrue('y' in view) # self.assertFalse('z' in view) # self.assertEqual(view['x'], 1) # self.assertEqual(view['y'], 2) # self.assertRaises(KeyError, view.__getitem__, 'z') # self.assertEqual(tuple(sorted(view)), ('x', 'y')) # self.assertEqual(len(view), 2) # copy = view.copy() # self.assertIsNot(copy, mapping) # self.assertIsInstance(copy, collections.ChainMap) # self.assertEqual(copy, mapping) # self.assertEqual(view.get('x'), 1) # self.assertEqual(view.get('y'), 2) # self.assertIsNone(view.get('z')) # self.assertEqual(tuple(sorted(view.items())), (('x', 1), ('y', 2))) # self.assertEqual(tuple(sorted(view.keys())), ('x', 'y')) # self.assertEqual(tuple(sorted(view.values())), (1, 2)) def test_contains(self): view = self.mappingproxy(dict.fromkeys('abc')) self.assertTrue('a' in view) self.assertTrue('b' in view) self.assertTrue('c' in view) self.assertFalse('xxx' in view) def test_views(self): mapping = {} view = self.mappingproxy(mapping) keys = view.keys() values = view.values() items = view.items() self.assertEqual(list(keys), []) self.assertEqual(list(values), []) self.assertEqual(list(items), []) mapping['key'] = 'value' self.assertEqual(list(keys), ['key']) self.assertEqual(list(values), ['value']) self.assertEqual(list(items), [('key', 'value')]) def test_len(self): for expected in range(6): data = dict.fromkeys('abcde'[:expected]) self.assertEqual(len(data), expected) view = self.mappingproxy(data) self.assertEqual(len(view), expected) def test_iterators(self): keys = ('x', 'y') values = (1, 2) items = tuple(zip(keys, values)) view = self.mappingproxy(dict(items)) self.assertEqual(set(view), set(keys)) self.assertEqual(set(view.keys()), set(keys)) self.assertEqual(set(view.values()), set(values)) self.assertEqual(set(view.items()), set(items)) def test_copy(self): original = {'key1': 27, 'key2': 51, 'key3': 93} view = self.mappingproxy(original) copy = view.copy() self.assertEqual(type(copy), dict) self.assertEqual(copy, original) original['key1'] = 70 self.assertEqual(view['key1'], 70) self.assertEqual(copy['key1'], 27) def test_union(self): mapping = {'a': 0, 'b': 1, 'c': 2} view = self.mappingproxy(mapping) with self.assertRaises(TypeError): view | [('r', 2), ('d', 2)] with self.assertRaises(TypeError): [('r', 2), ('d', 2)] | view with self.assertRaises(TypeError): view |= [('r', 2), ('d', 2)] other = {'c': 3, 'p': 0} self.assertEqual(view | other, {'a': 0, 'b': 1, 'c': 3, 'p': 0}) self.assertEqual(other | view, {'c': 2, 'p': 0, 'a': 0, 'b': 1}) self.assertEqual(view, {'a': 0, 'b': 1, 'c': 2}) self.assertEqual(mapping, {'a': 0, 'b': 1, 'c': 2}) self.assertEqual(other, {'c': 3, 'p': 0}) # class ClassCreationTests(unittest.TestCase): # class Meta(type): # def __init__(cls, name, bases, ns, **kw): # super().__init__(name, bases, ns) # @staticmethod # def __new__(mcls, name, bases, ns, **kw): # return super().__new__(mcls, name, bases, ns) # @classmethod # def __prepare__(mcls, name, bases, **kw): # ns = super().__prepare__(name, bases) # ns["y"] = 1 # ns.update(kw) # return ns # def test_new_class_basics(self): # C = types.new_class("C") # self.assertEqual(C.__name__, "C") # self.assertEqual(C.__bases__, (object,)) # def test_new_class_subclass(self): # C = types.new_class("C", (int,)) # self.assertTrue(issubclass(C, int)) # def test_new_class_meta(self): # Meta = self.Meta # settings = {"metaclass": Meta, "z": 2} # # We do this twice to make sure the passed in dict isn't mutated # for i in range(2): # C = types.new_class("C" + str(i), (), settings) # self.assertIsInstance(C, Meta) # self.assertEqual(C.y, 1) # self.assertEqual(C.z, 2) # def test_new_class_exec_body(self): # Meta = self.Meta # def func(ns): # ns["x"] = 0 # C = types.new_class("C", (), {"metaclass": Meta, "z": 2}, func) # self.assertIsInstance(C, Meta) # self.assertEqual(C.x, 0) # self.assertEqual(C.y, 1) # self.assertEqual(C.z, 2) # def test_new_class_metaclass_keywords(self): # #Test that keywords are passed to the metaclass: # def meta_func(name, bases, ns, **kw): # return name, bases, ns, kw # res = types.new_class("X", # (int, object), # dict(metaclass=meta_func, x=0)) # self.assertEqual(res, ("X", (int, object), {}, {"x": 0})) # def test_new_class_defaults(self): # # Test defaults/keywords: # C = types.new_class("C", (), {}, None) # self.assertEqual(C.__name__, "C") # self.assertEqual(C.__bases__, (object,)) # def test_new_class_meta_with_base(self): # Meta = self.Meta # def func(ns): # ns["x"] = 0 # C = types.new_class(name="C", # bases=(int,), # kwds=dict(metaclass=Meta, z=2), # exec_body=func) # self.assertTrue(issubclass(C, int)) # self.assertIsInstance(C, Meta) # self.assertEqual(C.x, 0) # self.assertEqual(C.y, 1) # self.assertEqual(C.z, 2) # def test_new_class_with_mro_entry(self): # class A: pass # class C: # def __mro_entries__(self, bases): # return (A,) # c = C() # D = types.new_class('D', (c,), {}) # self.assertEqual(D.__bases__, (A,)) # self.assertEqual(D.__orig_bases__, (c,)) # self.assertEqual(D.__mro__, (D, A, object)) # def test_new_class_with_mro_entry_none(self): # class A: pass # class B: pass # class C: # def __mro_entries__(self, bases): # return () # c = C() # D = types.new_class('D', (A, c, B), {}) # self.assertEqual(D.__bases__, (A, B)) # self.assertEqual(D.__orig_bases__, (A, c, B)) # self.assertEqual(D.__mro__, (D, A, B, object)) # def test_new_class_with_mro_entry_error(self): # class A: pass # class C: # def __mro_entries__(self, bases): # return A # c = C() # with self.assertRaises(TypeError): # types.new_class('D', (c,), {}) # def test_new_class_with_mro_entry_multiple(self): # class A1: pass # class A2: pass # class B1: pass # class B2: pass # class A: # def __mro_entries__(self, bases): # return (A1, A2) # class B: # def __mro_entries__(self, bases): # return (B1, B2) # D = types.new_class('D', (A(), B()), {}) # self.assertEqual(D.__bases__, (A1, A2, B1, B2)) # def test_new_class_with_mro_entry_multiple_2(self): # class A1: pass # class A2: pass # class A3: pass # class B1: pass # class B2: pass # class A: # def __mro_entries__(self, bases): # return (A1, A2, A3) # class B: # def __mro_entries__(self, bases): # return (B1, B2) # class C: pass # D = types.new_class('D', (A(), C, B()), {}) # self.assertEqual(D.__bases__, (A1, A2, A3, C, B1, B2)) # # Many of the following tests are derived from test_descr.py # def test_prepare_class(self): # # Basic test of metaclass derivation # expected_ns = {} # class A(type): # def __new__(*args, **kwargs): # return type.__new__(*args, **kwargs) # def __prepare__(*args): # return expected_ns # B = types.new_class("B", (object,)) # C = types.new_class("C", (object,), {"metaclass": A}) # # The most derived metaclass of D is A rather than type. # meta, ns, kwds = types.prepare_class("D", (B, C), {"metaclass": type}) # self.assertIs(meta, A) # self.assertIs(ns, expected_ns) # self.assertEqual(len(kwds), 0) # def test_bad___prepare__(self): # # __prepare__() must return a mapping. # class BadMeta(type): # @classmethod # def __prepare__(*args): # return None # with self.assertRaisesRegex(TypeError, # r'^BadMeta\.__prepare__\(\) must ' # r'return a mapping, not NoneType$'): # class Foo(metaclass=BadMeta): # pass # # Also test the case in which the metaclass is not a type. # class BadMeta: # @classmethod # def __prepare__(*args): # return None # with self.assertRaisesRegex(TypeError, # r'^\.__prepare__\(\) must ' # r'return a mapping, not NoneType$'): # class Bar(metaclass=BadMeta()): # pass # def test_resolve_bases(self): # class A: pass # class B: pass # class C: # def __mro_entries__(self, bases): # if A in bases: # return () # return (A,) # c = C() # self.assertEqual(types.resolve_bases(()), ()) # self.assertEqual(types.resolve_bases((c,)), (A,)) # self.assertEqual(types.resolve_bases((C,)), (C,)) # self.assertEqual(types.resolve_bases((A, C)), (A, C)) # self.assertEqual(types.resolve_bases((c, A)), (A,)) # self.assertEqual(types.resolve_bases((A, c)), (A,)) # x = (A,) # y = (C,) # z = (A, C) # t = (A, C, B) # for bases in [x, y, z, t]: # self.assertIs(types.resolve_bases(bases), bases) # def test_metaclass_derivation(self): # # issue1294232: correct metaclass calculation # new_calls = [] # to check the order of __new__ calls # class AMeta(type): # def __new__(mcls, name, bases, ns): # new_calls.append('AMeta') # return super().__new__(mcls, name, bases, ns) # @classmethod # def __prepare__(mcls, name, bases): # return {} # class BMeta(AMeta): # def __new__(mcls, name, bases, ns): # new_calls.append('BMeta') # return super().__new__(mcls, name, bases, ns) # @classmethod # def __prepare__(mcls, name, bases): # ns = super().__prepare__(name, bases) # ns['BMeta_was_here'] = True # return ns # A = types.new_class("A", (), {"metaclass": AMeta}) # self.assertEqual(new_calls, ['AMeta']) # new_calls.clear() # B = types.new_class("B", (), {"metaclass": BMeta}) # # BMeta.__new__ calls AMeta.__new__ with super: # self.assertEqual(new_calls, ['BMeta', 'AMeta']) # new_calls.clear() # C = types.new_class("C", (A, B)) # # The most derived metaclass is BMeta: # self.assertEqual(new_calls, ['BMeta', 'AMeta']) # new_calls.clear() # # BMeta.__prepare__ should've been called: # self.assertIn('BMeta_was_here', C.__dict__) # # The order of the bases shouldn't matter: # C2 = types.new_class("C2", (B, A)) # self.assertEqual(new_calls, ['BMeta', 'AMeta']) # new_calls.clear() # self.assertIn('BMeta_was_here', C2.__dict__) # # Check correct metaclass calculation when a metaclass is declared: # D = types.new_class("D", (C,), {"metaclass": type}) # self.assertEqual(new_calls, ['BMeta', 'AMeta']) # new_calls.clear() # self.assertIn('BMeta_was_here', D.__dict__) # E = types.new_class("E", (C,), {"metaclass": AMeta}) # self.assertEqual(new_calls, ['BMeta', 'AMeta']) # new_calls.clear() # self.assertIn('BMeta_was_here', E.__dict__) # def test_metaclass_override_function(self): # # Special case: the given metaclass isn't a class, # # so there is no metaclass calculation. # class A(metaclass=self.Meta): # pass # marker = object() # def func(*args, **kwargs): # return marker # X = types.new_class("X", (), {"metaclass": func}) # Y = types.new_class("Y", (object,), {"metaclass": func}) # Z = types.new_class("Z", (A,), {"metaclass": func}) # self.assertIs(marker, X) # self.assertIs(marker, Y) # self.assertIs(marker, Z) # def test_metaclass_override_callable(self): # # The given metaclass is a class, # # but not a descendant of type. # new_calls = [] # to check the order of __new__ calls # prepare_calls = [] # to track __prepare__ calls # class ANotMeta: # def __new__(mcls, *args, **kwargs): # new_calls.append('ANotMeta') # return super().__new__(mcls) # @classmethod # def __prepare__(mcls, name, bases): # prepare_calls.append('ANotMeta') # return {} # class BNotMeta(ANotMeta): # def __new__(mcls, *args, **kwargs): # new_calls.append('BNotMeta') # return super().__new__(mcls) # @classmethod # def __prepare__(mcls, name, bases): # prepare_calls.append('BNotMeta') # return super().__prepare__(name, bases) # A = types.new_class("A", (), {"metaclass": ANotMeta}) # self.assertIs(ANotMeta, type(A)) # self.assertEqual(prepare_calls, ['ANotMeta']) # prepare_calls.clear() # self.assertEqual(new_calls, ['ANotMeta']) # new_calls.clear() # B = types.new_class("B", (), {"metaclass": BNotMeta}) # self.assertIs(BNotMeta, type(B)) # self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta']) # prepare_calls.clear() # self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta']) # new_calls.clear() # C = types.new_class("C", (A, B)) # self.assertIs(BNotMeta, type(C)) # self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta']) # prepare_calls.clear() # self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta']) # new_calls.clear() # C2 = types.new_class("C2", (B, A)) # self.assertIs(BNotMeta, type(C2)) # self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta']) # prepare_calls.clear() # self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta']) # new_calls.clear() # # This is a TypeError, because of a metaclass conflict: # # BNotMeta is neither a subclass, nor a superclass of type # with self.assertRaises(TypeError): # D = types.new_class("D", (C,), {"metaclass": type}) # E = types.new_class("E", (C,), {"metaclass": ANotMeta}) # self.assertIs(BNotMeta, type(E)) # self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta']) # prepare_calls.clear() # self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta']) # new_calls.clear() # F = types.new_class("F", (object(), C)) # self.assertIs(BNotMeta, type(F)) # self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta']) # prepare_calls.clear() # self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta']) # new_calls.clear() # F2 = types.new_class("F2", (C, object())) # self.assertIs(BNotMeta, type(F2)) # self.assertEqual(prepare_calls, ['BNotMeta', 'ANotMeta']) # prepare_calls.clear() # self.assertEqual(new_calls, ['BNotMeta', 'ANotMeta']) # new_calls.clear() # # TypeError: BNotMeta is neither a # # subclass, nor a superclass of int # with self.assertRaises(TypeError): # X = types.new_class("X", (C, int())) # with self.assertRaises(TypeError): # X = types.new_class("X", (int(), C)) # def test_one_argument_type(self): # expected_message = 'type.__new__() takes exactly 3 arguments (1 given)' # # Only type itself can use the one-argument form (#27157) # self.assertIs(type(5), int) # class M(type): # pass # with self.assertRaises(TypeError) as cm: # M(5) # self.assertEqual(str(cm.exception), expected_message) # class N(type, metaclass=M): # pass # with self.assertRaises(TypeError) as cm: # N(5) # self.assertEqual(str(cm.exception), expected_message) # class SimpleNamespaceTests(unittest.TestCase): # def test_constructor(self): # ns1 = types.SimpleNamespace() # ns2 = types.SimpleNamespace(x=1, y=2) # ns3 = types.SimpleNamespace(**dict(x=1, y=2)) # with self.assertRaises(TypeError): # types.SimpleNamespace(1, 2, 3) # with self.assertRaises(TypeError): # types.SimpleNamespace(**{1: 2}) # self.assertEqual(len(ns1.__dict__), 0) # self.assertEqual(vars(ns1), {}) # self.assertEqual(len(ns2.__dict__), 2) # self.assertEqual(vars(ns2), {'y': 2, 'x': 1}) # self.assertEqual(len(ns3.__dict__), 2) # self.assertEqual(vars(ns3), {'y': 2, 'x': 1}) # def test_unbound(self): # ns1 = vars(types.SimpleNamespace()) # ns2 = vars(types.SimpleNamespace(x=1, y=2)) # self.assertEqual(ns1, {}) # self.assertEqual(ns2, {'y': 2, 'x': 1}) # def test_underlying_dict(self): # ns1 = types.SimpleNamespace() # ns2 = types.SimpleNamespace(x=1, y=2) # ns3 = types.SimpleNamespace(a=True, b=False) # mapping = ns3.__dict__ # del ns3 # self.assertEqual(ns1.__dict__, {}) # self.assertEqual(ns2.__dict__, {'y': 2, 'x': 1}) # self.assertEqual(mapping, dict(a=True, b=False)) # def test_attrget(self): # ns = types.SimpleNamespace(x=1, y=2, w=3) # self.assertEqual(ns.x, 1) # self.assertEqual(ns.y, 2) # self.assertEqual(ns.w, 3) # with self.assertRaises(AttributeError): # ns.z # def test_attrset(self): # ns1 = types.SimpleNamespace() # ns2 = types.SimpleNamespace(x=1, y=2, w=3) # ns1.a = 'spam' # ns1.b = 'ham' # ns2.z = 4 # ns2.theta = None # self.assertEqual(ns1.__dict__, dict(a='spam', b='ham')) # self.assertEqual(ns2.__dict__, dict(x=1, y=2, w=3, z=4, theta=None)) # def test_attrdel(self): # ns1 = types.SimpleNamespace() # ns2 = types.SimpleNamespace(x=1, y=2, w=3) # with self.assertRaises(AttributeError): # del ns1.spam # with self.assertRaises(AttributeError): # del ns2.spam # del ns2.y # self.assertEqual(vars(ns2), dict(w=3, x=1)) # ns2.y = 'spam' # self.assertEqual(vars(ns2), dict(w=3, x=1, y='spam')) # del ns2.y # self.assertEqual(vars(ns2), dict(w=3, x=1)) # ns1.spam = 5 # self.assertEqual(vars(ns1), dict(spam=5)) # del ns1.spam # self.assertEqual(vars(ns1), {}) # def test_repr(self): # ns1 = types.SimpleNamespace(x=1, y=2, w=3) # ns2 = types.SimpleNamespace() # ns2.x = "spam" # ns2._y = 5 # name = "namespace" # self.assertEqual(repr(ns1), "{name}(w=3, x=1, y=2)".format(name=name)) # self.assertEqual(repr(ns2), "{name}(_y=5, x='spam')".format(name=name)) # def test_equal(self): # ns1 = types.SimpleNamespace(x=1) # ns2 = types.SimpleNamespace() # ns2.x = 1 # self.assertEqual(types.SimpleNamespace(), types.SimpleNamespace()) # self.assertEqual(ns1, ns2) # self.assertNotEqual(ns2, types.SimpleNamespace()) # def test_nested(self): # ns1 = types.SimpleNamespace(a=1, b=2) # ns2 = types.SimpleNamespace() # ns3 = types.SimpleNamespace(x=ns1) # ns2.spam = ns1 # ns2.ham = '?' # ns2.spam = ns3 # self.assertEqual(vars(ns1), dict(a=1, b=2)) # self.assertEqual(vars(ns2), dict(spam=ns3, ham='?')) # self.assertEqual(ns2.spam, ns3) # self.assertEqual(vars(ns3), dict(x=ns1)) # self.assertEqual(ns3.x.a, 1) # def test_recursive(self): # ns1 = types.SimpleNamespace(c='cookie') # ns2 = types.SimpleNamespace() # ns3 = types.SimpleNamespace(x=1) # ns1.spam = ns1 # ns2.spam = ns3 # ns3.spam = ns2 # self.assertEqual(ns1.spam, ns1) # self.assertEqual(ns1.spam.spam, ns1) # self.assertEqual(ns1.spam.spam, ns1.spam) # self.assertEqual(ns2.spam, ns3) # self.assertEqual(ns3.spam, ns2) # self.assertEqual(ns2.spam.spam, ns2) # def test_recursive_repr(self): # ns1 = types.SimpleNamespace(c='cookie') # ns2 = types.SimpleNamespace() # ns3 = types.SimpleNamespace(x=1) # ns1.spam = ns1 # ns2.spam = ns3 # ns3.spam = ns2 # name = "namespace" # repr1 = "{name}(c='cookie', spam={name}(...))".format(name=name) # repr2 = "{name}(spam={name}(spam={name}(...), x=1))".format(name=name) # self.assertEqual(repr(ns1), repr1) # self.assertEqual(repr(ns2), repr2) # def test_as_dict(self): # ns = types.SimpleNamespace(spam='spamspamspam') # with self.assertRaises(TypeError): # len(ns) # with self.assertRaises(TypeError): # iter(ns) # with self.assertRaises(TypeError): # 'spam' in ns # with self.assertRaises(TypeError): # ns['spam'] # def test_subclass(self): # class Spam(types.SimpleNamespace): # pass # spam = Spam(ham=8, eggs=9) # self.assertIs(type(spam), Spam) # self.assertEqual(vars(spam), {'ham': 8, 'eggs': 9}) # def test_pickle(self): # ns = types.SimpleNamespace(breakfast="spam", lunch="spam") # for protocol in range(pickle.HIGHEST_PROTOCOL + 1): # pname = "protocol {}".format(protocol) # try: # ns_pickled = pickle.dumps(ns, protocol) # except TypeError as e: # raise TypeError(pname) from e # ns_roundtrip = pickle.loads(ns_pickled) # self.assertEqual(ns, ns_roundtrip, pname) # def test_fake_namespace_compare(self): # # Issue #24257: Incorrect use of PyObject_IsInstance() caused # # SystemError. # class FakeSimpleNamespace(str): # __class__ = types.SimpleNamespace # self.assertFalse(types.SimpleNamespace() == FakeSimpleNamespace()) # self.assertTrue(types.SimpleNamespace() != FakeSimpleNamespace()) # with self.assertRaises(TypeError): # types.SimpleNamespace() < FakeSimpleNamespace() # with self.assertRaises(TypeError): # types.SimpleNamespace() <= FakeSimpleNamespace() # with self.assertRaises(TypeError): # types.SimpleNamespace() > FakeSimpleNamespace() # with self.assertRaises(TypeError): # types.SimpleNamespace() >= FakeSimpleNamespace() # class CoroutineTests(unittest.TestCase): # def test_wrong_args(self): # samples = [None, 1, object()] # for sample in samples: # with self.assertRaisesRegex(TypeError, # 'types.coroutine.*expects a callable'): # types.coroutine(sample) # def test_non_gen_values(self): # @types.coroutine # def foo(): # return 'spam' # self.assertEqual(foo(), 'spam') # class Awaitable: # def __await__(self): # return () # aw = Awaitable() # @types.coroutine # def foo(): # return aw # self.assertIs(aw, foo()) # # decorate foo second time # foo = types.coroutine(foo) # self.assertIs(aw, foo()) # def test_async_def(self): # # Test that types.coroutine passes 'async def' coroutines # # without modification # async def foo(): pass # foo_code = foo.__code__ # foo_flags = foo.__code__.co_flags # decorated_foo = types.coroutine(foo) # self.assertIs(foo, decorated_foo) # self.assertEqual(foo.__code__.co_flags, foo_flags) # self.assertIs(decorated_foo.__code__, foo_code) # foo_coro = foo() # def bar(): return foo_coro # for _ in range(2): # bar = types.coroutine(bar) # coro = bar() # self.assertIs(foo_coro, coro) # self.assertEqual(coro.cr_code.co_flags, foo_flags) # coro.close() # def test_duck_coro(self): # class CoroLike: # def send(self): pass # def throw(self): pass # def close(self): pass # def __await__(self): return self # coro = CoroLike() # @types.coroutine # def foo(): # return coro # self.assertIs(foo(), coro) # self.assertIs(foo().__await__(), coro) # def test_duck_corogen(self): # class CoroGenLike: # def send(self): pass # def throw(self): pass # def close(self): pass # def __await__(self): return self # def __iter__(self): return self # def __next__(self): pass # coro = CoroGenLike() # @types.coroutine # def foo(): # return coro # self.assertIs(foo(), coro) # self.assertIs(foo().__await__(), coro) # def test_duck_gen(self): # class GenLike: # def send(self): pass # def throw(self): pass # def close(self): pass # def __iter__(self): pass # def __next__(self): pass # # Setup generator mock object # gen = unittest.mock.MagicMock(GenLike) # gen.__iter__ = lambda gen: gen # gen.__name__ = 'gen' # gen.__qualname__ = 'test.gen' # self.assertIsInstance(gen, collections.abc.Generator) # self.assertIs(gen, iter(gen)) # @types.coroutine # def foo(): return gen # wrapper = foo() # self.assertIsInstance(wrapper, types._GeneratorWrapper) # self.assertIs(wrapper.__await__(), wrapper) # # Wrapper proxies duck generators completely: # self.assertIs(iter(wrapper), wrapper) # self.assertIsInstance(wrapper, collections.abc.Coroutine) # self.assertIsInstance(wrapper, collections.abc.Awaitable) # self.assertIs(wrapper.__qualname__, gen.__qualname__) # self.assertIs(wrapper.__name__, gen.__name__) # # Test AttributeErrors # for name in {'gi_running', 'gi_frame', 'gi_code', 'gi_yieldfrom', # 'cr_running', 'cr_frame', 'cr_code', 'cr_await'}: # with self.assertRaises(AttributeError): # getattr(wrapper, name) # # Test attributes pass-through # gen.gi_running = object() # gen.gi_frame = object() # gen.gi_code = object() # gen.gi_yieldfrom = object() # self.assertIs(wrapper.gi_running, gen.gi_running) # self.assertIs(wrapper.gi_frame, gen.gi_frame) # self.assertIs(wrapper.gi_code, gen.gi_code) # self.assertIs(wrapper.gi_yieldfrom, gen.gi_yieldfrom) # self.assertIs(wrapper.cr_running, gen.gi_running) # self.assertIs(wrapper.cr_frame, gen.gi_frame) # self.assertIs(wrapper.cr_code, gen.gi_code) # self.assertIs(wrapper.cr_await, gen.gi_yieldfrom) # wrapper.close() # gen.close.assert_called_once_with() # wrapper.send(1) # gen.send.assert_called_once_with(1) # gen.reset_mock() # next(wrapper) # gen.__next__.assert_called_once_with() # gen.reset_mock() # wrapper.throw(1, 2, 3) # gen.throw.assert_called_once_with(1, 2, 3) # gen.reset_mock() # wrapper.throw(1, 2) # gen.throw.assert_called_once_with(1, 2) # gen.reset_mock() # wrapper.throw(1) # gen.throw.assert_called_once_with(1) # gen.reset_mock() # # Test exceptions propagation # error = Exception() # gen.throw.side_effect = error # try: # wrapper.throw(1) # except Exception as ex: # self.assertIs(ex, error) # else: # self.fail('wrapper did not propagate an exception') # # Test invalid args # gen.reset_mock() # with self.assertRaises(TypeError): # wrapper.throw() # self.assertFalse(gen.throw.called) # with self.assertRaises(TypeError): # wrapper.close(1) # self.assertFalse(gen.close.called) # with self.assertRaises(TypeError): # wrapper.send() # self.assertFalse(gen.send.called) # # Test that we do not double wrap # @types.coroutine # def bar(): return wrapper # self.assertIs(wrapper, bar()) # # Test weakrefs support # ref = weakref.ref(wrapper) # self.assertIs(ref(), wrapper) # def test_duck_functional_gen(self): # class Generator: # """Emulates the following generator (very clumsy): # def gen(fut): # result = yield fut # return result * 2 # """ # def __init__(self, fut): # self._i = 0 # self._fut = fut # def __iter__(self): # return self # def __next__(self): # return self.send(None) # def send(self, v): # try: # if self._i == 0: # assert v is None # return self._fut # if self._i == 1: # raise StopIteration(v * 2) # if self._i > 1: # raise StopIteration # finally: # self._i += 1 # def throw(self, tp, *exc): # self._i = 100 # if tp is not GeneratorExit: # raise tp # def close(self): # self.throw(GeneratorExit) # @types.coroutine # def foo(): return Generator('spam') # wrapper = foo() # self.assertIsInstance(wrapper, types._GeneratorWrapper) # async def corofunc(): # return await foo() + 100 # coro = corofunc() # self.assertEqual(coro.send(None), 'spam') # try: # coro.send(20) # except StopIteration as ex: # self.assertEqual(ex.args[0], 140) # else: # self.fail('StopIteration was expected') # def test_gen(self): # def gen_func(): # yield 1 # return (yield 2) # gen = gen_func() # @types.coroutine # def foo(): return gen # wrapper = foo() # self.assertIsInstance(wrapper, types._GeneratorWrapper) # self.assertIs(wrapper.__await__(), gen) # for name in ('__name__', '__qualname__', 'gi_code', # 'gi_running', 'gi_frame'): # self.assertIs(getattr(foo(), name), # getattr(gen, name)) # self.assertIs(foo().cr_code, gen.gi_code) # self.assertEqual(next(wrapper), 1) # self.assertEqual(wrapper.send(None), 2) # with self.assertRaisesRegex(StopIteration, 'spam'): # wrapper.send('spam') # gen = gen_func() # wrapper = foo() # wrapper.send(None) # with self.assertRaisesRegex(Exception, 'ham'): # wrapper.throw(Exception, Exception('ham')) # # decorate foo second time # foo = types.coroutine(foo) # self.assertIs(foo().__await__(), gen) # def test_returning_itercoro(self): # @types.coroutine # def gen(): # yield # gencoro = gen() # @types.coroutine # def foo(): # return gencoro # self.assertIs(foo(), gencoro) # # decorate foo second time # foo = types.coroutine(foo) # self.assertIs(foo(), gencoro) # def test_genfunc(self): # def gen(): yield # self.assertIs(types.coroutine(gen), gen) # self.assertIs(types.coroutine(types.coroutine(gen)), gen) # self.assertTrue(gen.__code__.co_flags & inspect.CO_ITERABLE_COROUTINE) # self.assertFalse(gen.__code__.co_flags & inspect.CO_COROUTINE) # g = gen() # self.assertTrue(g.gi_code.co_flags & inspect.CO_ITERABLE_COROUTINE) # self.assertFalse(g.gi_code.co_flags & inspect.CO_COROUTINE) # self.assertIs(types.coroutine(gen), gen) # def test_wrapper_object(self): # def gen(): # yield # @types.coroutine # def coro(): # return gen() # wrapper = coro() # self.assertIn('GeneratorWrapper', repr(wrapper)) # self.assertEqual(repr(wrapper), str(wrapper)) # self.assertTrue(set(dir(wrapper)).issuperset({ # '__await__', '__iter__', '__next__', 'cr_code', 'cr_running', # 'cr_frame', 'gi_code', 'gi_frame', 'gi_running', 'send', # 'close', 'throw'})) if __name__ == '__main__': unittest.main()