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pythonnet/src/embed_tests/TestPythonException.cs at master · harshitsinha6/pythonnet · GitHub
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TestPythonException.cs
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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
(
"list index out of range"
,
ex
.
Message
)
;
Assert
.
IsNull
(
foo
)
;
}
[
Test
]
public
void
TestType
(
)
{
var
list
=
new
PyList
(
)
;
PyObject
foo
=
null
;
var
ex
=
Assert
.
Throws
<
PythonException
>
(
(
)
=>
foo
=
list
[
0
]
)
;
Assert
.
AreEqual
(
"IndexError"
,
ex
.
Type
.
Name
)
;
Assert
.
IsNull
(
foo
)
;
}
[
Test
]
public
void
TestNoError
(
)
{
// There is no PyErr to fetch
Assert
.
Throws
<
InvalidOperationException
>
(
(
)
=>
PythonException
.
FetchCurrentRaw
(
)
)
;
var
currentError
=
PythonException
.
FetchCurrentOrNullRaw
(
)
;
Assert
.
IsNull
(
currentError
)
;
}
[
Test
]
public
void
TestNestedExceptions
(
)
{
try
{
PythonEngine
.
Exec
(
@"
try:
raise Exception('inner')
except Exception as ex:
raise Exception('outer') from ex
"
)
;
}
catch
(
PythonException
ex
)
{
Assert
.
That
(
ex
.
InnerException
,
Is
.
InstanceOf
<
PythonException
>
(
)
)
;
Assert
.
That
(
ex
.
InnerException
.
Message
,
Is
.
EqualTo
(
"inner"
)
)
;
}
}
[
Test
]
public
void
InnerIsEmptyWithNoCause
(
)
{
var
list
=
new
PyList
(
)
;
PyObject
foo
=
null
;
var
ex
=
Assert
.
Throws
<
PythonException
>
(
(
)
=>
foo
=
list
[
0
]
)
;
Assert
.
IsNull
(
ex
.
InnerException
)
;
}
[
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
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
(
)
;
var
typePtr
=
new
NewReference
(
type
.
Reference
)
;
var
strPtr
=
new
NewReference
(
str
.
Reference
)
;
var
tbPtr
=
new
NewReference
(
Runtime
.
Runtime
.
None
.
Reference
)
;
Runtime
.
Runtime
.
PyErr_NormalizeException
(
ref
typePtr
,
ref
strPtr
,
ref
tbPtr
)
;
using
var
typeObj
=
typePtr
.
MoveToPyObject
(
)
;
using
var
strObj
=
strPtr
.
MoveToPyObject
(
)
;
using
var
tbObj
=
tbPtr
.
MoveToPyObject
(
)
;
// 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
,
typeObj
.
Handle
)
;
// 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
=
PythonException
.
FetchCurrentRaw
(
)
;
Exceptions
.
SetError
(
Exceptions
.
TypeError
,
"Another error"
)
;
Assert
.
Throws
<
InvalidOperationException
>
(
(
)
=>
pythonException
.
Normalize
(
)
)
;
Exceptions
.
Clear
(
)
;
}
}
}
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