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pythonnet/src/embed_tests/NeedsReinit/TestPyInitialize.cs at v3.2.1 · pythonnet/pythonnet · GitHub
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embed_tests
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TestPyInitialize.cs
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pythonnet
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embed_tests
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TestPyInitialize.cs
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using
System
;
using
NUnit
.
Framework
;
using
Python
.
Runtime
;
namespace
Python
.
EmbeddingTest
.
NeedsReinit
{
[
Category
(
"NeedsReinit"
)
]
public
class
TestPyInitialize
:
StopAndRestartEngine
{
/// <summary>
/// Tests issue with multiple simple Initialize/Shutdowns.
/// Fixed by #343
/// </summary>
[
Test
]
public
static
void
StartAndStopTwice
(
)
{
PythonEngine
.
Initialize
(
)
;
PythonEngine
.
Shutdown
(
)
;
PythonEngine
.
Initialize
(
)
;
PythonEngine
.
Shutdown
(
)
;
}
[
Test
]
public
static
void
LoadDefaultArgs
(
)
{
using
(
new
PythonEngine
(
)
)
{
using
(
var
argv
=
new
PyList
(
Runtime
.
Runtime
.
PySys_GetObject
(
"argv"
)
)
)
{
Assert
.
That
(
argv
.
Length
(
)
,
Is
.
Not
.
EqualTo
(
0
)
)
;
}
}
}
[
Test
]
public
static
void
LoadSpecificArgs
(
)
{
var
args
=
new
[
]
{
"test1"
,
"test2"
}
;
using
(
new
PythonEngine
(
args
)
)
{
using
(
var
argv
=
new
PyList
(
Runtime
.
Runtime
.
PySys_GetObject
(
"argv"
)
)
)
{
using
var
v0
=
argv
[
0
]
;
using
var
v1
=
argv
[
1
]
;
Assert
.
That
(
v0
.
ToString
(
)
,
Is
.
EqualTo
(
args
[
0
]
)
)
;
Assert
.
That
(
v1
.
ToString
(
)
,
Is
.
EqualTo
(
args
[
1
]
)
)
;
}
}
}
// regression test for https://github.com/pythonnet/pythonnet/issues/1561
[
Test
]
public
void
ImportClassShutdownRefcount
(
)
{
PythonEngine
.
Initialize
(
)
;
PyObject
ns
=
Py
.
Import
(
typeof
(
ImportClassShutdownRefcountClass
)
.
Namespace
)
;
PyObject
cls
=
ns
.
GetAttr
(
nameof
(
ImportClassShutdownRefcountClass
)
)
;
BorrowedReference
clsRef
=
cls
.
Reference
;
#pragma warning disable
CS0618
// Type or member is obsolete
cls
.
Leak
(
)
;
#pragma warning restore
CS0618
// Type or member is obsolete
ns
.
Dispose
(
)
;
Assert
.
Less
(
Runtime
.
Runtime
.
Refcount32
(
clsRef
)
,
256
)
;
PythonEngine
.
Shutdown
(
)
;
Assert
.
Greater
(
Runtime
.
Runtime
.
Refcount32
(
clsRef
)
,
0
)
;
}
/// <summary>
/// Failing test demonstrating current issue with OverflowException (#376)
/// and ArgumentException issue after that one is fixed.
/// More complex version of StartAndStopTwice test
/// </summary>
[
Test
]
[
Ignore
(
"GH#376: System.OverflowException : Arithmetic operation resulted in an overflow"
)
]
//[Ignore("System.ArgumentException : Cannot pass a GCHandle across AppDomains")]
public
void
ReInitialize
(
)
{
var
code
=
"from System import Int32
\n
"
;
PythonEngine
.
Initialize
(
)
;
using
(
Py
.
GIL
(
)
)
{
// Import any class or struct from .NET
PythonEngine
.
RunSimpleString
(
code
)
;
}
PythonEngine
.
Shutdown
(
)
;
PythonEngine
.
Initialize
(
)
;
using
(
Py
.
GIL
(
)
)
{
// Import a class/struct from .NET
// This class/struct must be imported during the first initialization.
PythonEngine
.
RunSimpleString
(
code
)
;
// Create an instance of the class/struct
// System.OverflowException Exception will be raised here.
// If replacing int with Int64, OverflowException will be replaced with AppDomain exception.
PythonEngine
.
RunSimpleString
(
"Int32(1)"
)
;
}
PythonEngine
.
Shutdown
(
)
;
}
/// <summary>
/// Helper for testing the shutdown handlers.
/// </summary>
int
shutdown_count
=
0
;
void
OnShutdownIncrement
(
)
{
shutdown_count
++
;
}
void
OnShutdownDouble
(
)
{
shutdown_count
*=
2
;
}
/// <summary>
/// Test the shutdown handlers.
/// </summary>
[
Test
]
public
void
ShutdownHandlers
(
)
{
// Test we can run one shutdown handler.
shutdown_count
=
0
;
PythonEngine
.
Initialize
(
)
;
PythonEngine
.
AddShutdownHandler
(
OnShutdownIncrement
)
;
PythonEngine
.
Shutdown
(
)
;
Assert
.
That
(
shutdown_count
,
Is
.
EqualTo
(
1
)
)
;
// Test we can run multiple shutdown handlers in the right order.
shutdown_count
=
4
;
PythonEngine
.
Initialize
(
)
;
PythonEngine
.
AddShutdownHandler
(
OnShutdownIncrement
)
;
PythonEngine
.
AddShutdownHandler
(
OnShutdownDouble
)
;
PythonEngine
.
Shutdown
(
)
;
// Correct: 4 * 2 + 1 = 9
// Wrong: (4 + 1) * 2 = 10
Assert
.
That
(
shutdown_count
,
Is
.
EqualTo
(
9
)
)
;
// Test we can remove shutdown handlers, handling duplicates.
shutdown_count
=
4
;
PythonEngine
.
Initialize
(
)
;
PythonEngine
.
AddShutdownHandler
(
OnShutdownIncrement
)
;
PythonEngine
.
AddShutdownHandler
(
OnShutdownIncrement
)
;
PythonEngine
.
AddShutdownHandler
(
OnShutdownDouble
)
;
PythonEngine
.
AddShutdownHandler
(
OnShutdownIncrement
)
;
PythonEngine
.
AddShutdownHandler
(
OnShutdownDouble
)
;
PythonEngine
.
RemoveShutdownHandler
(
OnShutdownDouble
)
;
PythonEngine
.
Shutdown
(
)
;
// Correct: (4 + 1) * 2 + 1 + 1 = 12
// Wrong: (4 * 2) + 1 + 1 + 1 = 11
Assert
.
That
(
shutdown_count
,
Is
.
EqualTo
(
12
)
)
;
}
}
public
class
ImportClassShutdownRefcountClass
{
}
}
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