1import pytest 2
| 1import pytest 2
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| 3from pybind11_tests import exceptions as m 4import pybind11_cross_module_tests as cm
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3
| 5
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4def test_error_already_set(msg): 5 from pybind11_tests import throw_already_set
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6
| 6
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| 7def test_std_exception(msg):
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7 with pytest.raises(RuntimeError) as excinfo:
| 8 with pytest.raises(RuntimeError) as excinfo:
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8 throw_already_set(False)
| 9 m.throw_std_exception() 10 assert msg(excinfo.value) == "This exception was intentionally thrown." 11 12 13def test_error_already_set(msg): 14 with pytest.raises(RuntimeError) as excinfo: 15 m.throw_already_set(False)
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9 assert msg(excinfo.value) == "Unknown internal error occurred" 10 11 with pytest.raises(ValueError) as excinfo:
| 16 assert msg(excinfo.value) == "Unknown internal error occurred" 17 18 with pytest.raises(ValueError) as excinfo:
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12 throw_already_set(True)
| 19 m.throw_already_set(True)
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13 assert msg(excinfo.value) == "foo" 14 15
| 20 assert msg(excinfo.value) == "foo" 21 22
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16def test_python_call_in_catch(): 17 from pybind11_tests import python_call_in_destructor
| 23def test_cross_module_exceptions(): 24 with pytest.raises(RuntimeError) as excinfo: 25 cm.raise_runtime_error() 26 assert str(excinfo.value) == "My runtime error"
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18
| 27
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| 28 with pytest.raises(ValueError) as excinfo: 29 cm.raise_value_error() 30 assert str(excinfo.value) == "My value error" 31 32 with pytest.raises(ValueError) as excinfo: 33 cm.throw_pybind_value_error() 34 assert str(excinfo.value) == "pybind11 value error" 35 36 with pytest.raises(TypeError) as excinfo: 37 cm.throw_pybind_type_error() 38 assert str(excinfo.value) == "pybind11 type error" 39 40 with pytest.raises(StopIteration) as excinfo: 41 cm.throw_stop_iteration() 42 43 44def test_python_call_in_catch():
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19 d = {}
| 45 d = {}
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20 assert python_call_in_destructor(d) is True
| 46 assert m.python_call_in_destructor(d) is True
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21 assert d["good"] is True 22 23
| 47 assert d["good"] is True 48 49
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24def test_custom(msg): 25 from pybind11_tests import (MyException, MyException5, MyException5_1, 26 throws1, throws2, throws3, throws4, throws5, throws5_1, 27 throws_logic_error)
| 50def test_exception_matches(): 51 m.exception_matches()
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28
| 52
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29 # Can we catch a MyException?" 30 with pytest.raises(MyException) as excinfo: 31 throws1()
| 53 54def test_custom(msg): 55 # Can we catch a MyException? 56 with pytest.raises(m.MyException) as excinfo: 57 m.throws1()
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32 assert msg(excinfo.value) == "this error should go to a custom type" 33 34 # Can we translate to standard Python exceptions? 35 with pytest.raises(RuntimeError) as excinfo:
| 58 assert msg(excinfo.value) == "this error should go to a custom type" 59 60 # Can we translate to standard Python exceptions? 61 with pytest.raises(RuntimeError) as excinfo:
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36 throws2()
| 62 m.throws2()
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37 assert msg(excinfo.value) == "this error should go to a standard Python exception" 38 39 # Can we handle unknown exceptions? 40 with pytest.raises(RuntimeError) as excinfo:
| 63 assert msg(excinfo.value) == "this error should go to a standard Python exception" 64 65 # Can we handle unknown exceptions? 66 with pytest.raises(RuntimeError) as excinfo:
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41 throws3()
| 67 m.throws3()
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42 assert msg(excinfo.value) == "Caught an unknown exception!" 43 44 # Can we delegate to another handler by rethrowing?
| 68 assert msg(excinfo.value) == "Caught an unknown exception!" 69 70 # Can we delegate to another handler by rethrowing?
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45 with pytest.raises(MyException) as excinfo: 46 throws4()
| 71 with pytest.raises(m.MyException) as excinfo: 72 m.throws4()
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47 assert msg(excinfo.value) == "this error is rethrown" 48
| 73 assert msg(excinfo.value) == "this error is rethrown" 74
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49 # "Can we fall-through to the default handler?"
| 75 # Can we fall-through to the default handler?
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50 with pytest.raises(RuntimeError) as excinfo:
| 76 with pytest.raises(RuntimeError) as excinfo:
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51 throws_logic_error()
| 77 m.throws_logic_error()
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52 assert msg(excinfo.value) == "this error should fall through to the standard handler" 53 54 # Can we handle a helper-declared exception?
| 78 assert msg(excinfo.value) == "this error should fall through to the standard handler" 79 80 # Can we handle a helper-declared exception?
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55 with pytest.raises(MyException5) as excinfo: 56 throws5()
| 81 with pytest.raises(m.MyException5) as excinfo: 82 m.throws5()
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57 assert msg(excinfo.value) == "this is a helper-defined translated exception" 58 59 # Exception subclassing:
| 83 assert msg(excinfo.value) == "this is a helper-defined translated exception" 84 85 # Exception subclassing:
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60 with pytest.raises(MyException5) as excinfo: 61 throws5_1()
| 86 with pytest.raises(m.MyException5) as excinfo: 87 m.throws5_1()
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62 assert msg(excinfo.value) == "MyException5 subclass"
| 88 assert msg(excinfo.value) == "MyException5 subclass"
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63 assert isinstance(excinfo.value, MyException5_1)
| 89 assert isinstance(excinfo.value, m.MyException5_1)
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64
| 90
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65 with pytest.raises(MyException5_1) as excinfo: 66 throws5_1()
| 91 with pytest.raises(m.MyException5_1) as excinfo: 92 m.throws5_1()
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67 assert msg(excinfo.value) == "MyException5 subclass" 68
| 93 assert msg(excinfo.value) == "MyException5 subclass" 94
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69 with pytest.raises(MyException5) as excinfo:
| 95 with pytest.raises(m.MyException5) as excinfo:
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70 try:
| 96 try:
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71 throws5() 72 except MyException5_1:
| 97 m.throws5() 98 except m.MyException5_1:
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73 raise RuntimeError("Exception error: caught child from parent") 74 assert msg(excinfo.value) == "this is a helper-defined translated exception"
| 99 raise RuntimeError("Exception error: caught child from parent") 100 assert msg(excinfo.value) == "this is a helper-defined translated exception"
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| 101 102 103def test_nested_throws(capture): 104 """Tests nested (e.g. C++ -> Python -> C++) exception handling""" 105 106 def throw_myex(): 107 raise m.MyException("nested error") 108 109 def throw_myex5(): 110 raise m.MyException5("nested error 5") 111 112 # In the comments below, the exception is caught in the first step, thrown in the last step 113 114 # C++ -> Python 115 with capture: 116 m.try_catch(m.MyException5, throw_myex5) 117 assert str(capture).startswith("MyException5: nested error 5") 118 119 # Python -> C++ -> Python 120 with pytest.raises(m.MyException) as excinfo: 121 m.try_catch(m.MyException5, throw_myex) 122 assert str(excinfo.value) == "nested error" 123 124 def pycatch(exctype, f, *args): 125 try: 126 f(*args) 127 except m.MyException as e: 128 print(e) 129 130 # C++ -> Python -> C++ -> Python 131 with capture: 132 m.try_catch( 133 m.MyException5, pycatch, m.MyException, m.try_catch, m.MyException, throw_myex5) 134 assert str(capture).startswith("MyException5: nested error 5") 135 136 # C++ -> Python -> C++ 137 with capture: 138 m.try_catch(m.MyException, pycatch, m.MyException5, m.throws4) 139 assert capture == "this error is rethrown" 140 141 # Python -> C++ -> Python -> C++ 142 with pytest.raises(m.MyException5) as excinfo: 143 m.try_catch(m.MyException, pycatch, m.MyException, m.throws5) 144 assert str(excinfo.value) == "this is a helper-defined translated exception"
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