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pythonnet/src/embed_tests/TestPythonException.cs at master · MarceloMML/pythonnet · GitHub
MarceloMML
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TestPythonException.cs
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embed_tests
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TestPythonException.cs
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using
System
;
using
NUnit
.
Framework
;
using
Python
.
Runtime
;
namespace
Python
.
EmbeddingTest
{
public
class
TestPythonException
{
private
IntPtr
_gs
;
[
SetUp
]
public
void
SetUp
(
)
{
PythonEngine
.
Initialize
(
)
;
_gs
=
PythonEngine
.
AcquireLock
(
)
;
}
[
TearDown
]
public
void
Dispose
(
)
{
PythonEngine
.
ReleaseLock
(
_gs
)
;
PythonEngine
.
Shutdown
(
)
;
}
[
Test
]
public
void
TestMessage
(
)
{
var
list
=
new
PyList
(
)
;
PyObject
foo
=
null
;
var
ex
=
Assert
.
Throws
<
PythonException
>
(
(
)
=>
foo
=
list
[
0
]
)
;
Assert
.
AreEqual
(
"IndexError : list index out of range"
,
ex
.
Message
)
;
Assert
.
IsNull
(
foo
)
;
}
[
Test
]
public
void
TestNoError
(
)
{
var
e
=
new
PythonException
(
)
;
// There is no PyErr to fetch
Assert
.
AreEqual
(
""
,
e
.
Message
)
;
}
[
Test
]
public
void
TestPythonErrorTypeName
(
)
{
try
{
var
module
=
PyModule
.
Import
(
"really____unknown___module"
)
;
Assert
.
Fail
(
"Unknown module should not be loaded"
)
;
}
catch
(
PythonException
ex
)
{
Assert
.
That
(
ex
.
PythonTypeName
,
Is
.
EqualTo
(
"ModuleNotFoundError"
)
.
Or
.
EqualTo
(
"ImportError"
)
)
;
}
}
[
Test
]
public
void
TestPythonExceptionFormat
(
)
{
try
{
PythonEngine
.
Exec
(
"raise ValueError('Error!')"
)
;
Assert
.
Fail
(
"Exception should have been raised"
)
;
}
catch
(
PythonException
ex
)
{
// Console.WriteLine($"Format: {ex.Format()}");
// Console.WriteLine($"Stacktrace: {ex.StackTrace}");
Assert
.
That
(
ex
.
Format
(
)
,
Does
.
Contain
(
"Traceback"
)
.
And
.
Contains
(
"(most recent call last):"
)
.
And
.
Contains
(
"ValueError: Error!"
)
)
;
// Check that the stacktrace is properly formatted
Assert
.
That
(
ex
.
StackTrace
,
Does
.
Not
.
StartWith
(
"["
)
.
And
.
Not
.
Contain
(
"
\\
n"
)
)
;
}
}
[
Test
]
public
void
TestPythonExceptionFormatNoError
(
)
{
var
ex
=
new
PythonException
(
)
;
Assert
.
AreEqual
(
ex
.
StackTrace
,
ex
.
Format
(
)
)
;
}
[
Test
]
public
void
TestPythonExceptionFormatNoTraceback
(
)
{
try
{
var
module
=
PyModule
.
Import
(
"really____unknown___module"
)
;
Assert
.
Fail
(
"Unknown module should not be loaded"
)
;
}
catch
(
PythonException
ex
)
{
// ImportError/ModuleNotFoundError do not have a traceback when not running in a script
Assert
.
AreEqual
(
ex
.
StackTrace
,
ex
.
Format
(
)
)
;
}
}
[
Test
]
public
void
TestPythonExceptionFormatNormalized
(
)
{
try
{
PythonEngine
.
Exec
(
"a=b
\n
"
)
;
Assert
.
Fail
(
"Exception should have been raised"
)
;
}
catch
(
PythonException
ex
)
{
Assert
.
AreEqual
(
"Traceback (most recent call last):
\n
File
\"
<string>
\"
, line 1, in <module>
\n
NameError: name 'b' is not defined
\n
"
,
ex
.
Format
(
)
)
;
}
}
[
Test
]
public
void
TestPythonException_PyErr_NormalizeException
(
)
{
using
(
var
scope
=
Py
.
CreateScope
(
)
)
{
scope
.
Exec
(
@"
class TestException(NameError):
def __init__(self, val):
super().__init__(val)
x = int(val)"
)
;
Assert
.
IsTrue
(
scope
.
TryGet
(
"TestException"
,
out
PyObject
type
)
)
;
PyObject
str
=
"dummy string"
.
ToPython
(
)
;
IntPtr
typePtr
=
type
.
Handle
;
IntPtr
strPtr
=
str
.
Handle
;
IntPtr
tbPtr
=
Runtime
.
Runtime
.
None
.
Handle
;
Runtime
.
Runtime
.
XIncref
(
typePtr
)
;
Runtime
.
Runtime
.
XIncref
(
strPtr
)
;
Runtime
.
Runtime
.
XIncref
(
tbPtr
)
;
Runtime
.
Runtime
.
PyErr_NormalizeException
(
ref
typePtr
,
ref
strPtr
,
ref
tbPtr
)
;
using
(
PyObject
typeObj
=
new
PyObject
(
typePtr
)
,
strObj
=
new
PyObject
(
strPtr
)
,
tbObj
=
new
PyObject
(
tbPtr
)
)
{
// the type returned from PyErr_NormalizeException should not be the same type since a new
// exception was raised by initializing the exception
Assert
.
AreNotEqual
(
type
.
Handle
,
typePtr
)
;
// the message should now be the string from the throw exception during normalization
Assert
.
AreEqual
(
"invalid literal for int() with base 10: 'dummy string'"
,
strObj
.
ToString
(
)
)
;
}
}
}
[
Test
]
public
void
TestPythonException_Normalize_ThrowsWhenErrorSet
(
)
{
Exceptions
.
SetError
(
Exceptions
.
TypeError
,
"Error!"
)
;
var
pythonException
=
new
PythonException
(
)
;
Exceptions
.
SetError
(
Exceptions
.
TypeError
,
"Another error"
)
;
Assert
.
Throws
<
InvalidOperationException
>
(
(
)
=>
pythonException
.
Normalize
(
)
)
;
}
}
}
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