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TestPythonEngineProperties.cs
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285 lines (236 loc) · 8.78 KB
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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using NUnit.Framework;
using Python.Runtime;
namespace Python.EmbeddingTest
{
public class TestPythonEngineProperties
{
[Test]
public static void GetBuildinfoDoesntCrash()
{
using (Py.GIL())
{
string s = PythonEngine.BuildInfo;
Assert.True(s.Length > 5);
Assert.True(s.Contains(","));
}
}
[Test]
public static void GetCompilerDoesntCrash()
{
using (Py.GIL())
{
string s = PythonEngine.Compiler;
Assert.True(s.Length > 0);
Assert.True(s.Contains("["));
Assert.True(s.Contains("]"));
}
}
[Test]
public static void GetCopyrightDoesntCrash()
{
using (Py.GIL())
{
string s = PythonEngine.Copyright;
Assert.True(s.Length > 0);
Assert.True(s.Contains("Python Software Foundation"));
}
}
[Test]
public static void GetPlatformDoesntCrash()
{
using (Py.GIL())
{
string s = PythonEngine.Platform;
Assert.True(s.Length > 0);
Assert.True(s.Contains("x") || s.Contains("win"));
}
}
[Test]
public static void GetVersionDoesntCrash()
{
using (Py.GIL())
{
string s = PythonEngine.Version;
Assert.True(s.Length > 0);
Assert.True(s.Contains(","));
}
}
[Test]
public static void GetPythonPathDefault()
{
PythonEngine.Initialize();
string s = PythonEngine.PythonPath;
StringAssert.Contains("python", s.ToLower());
PythonEngine.Shutdown();
}
[Test]
public static void GetProgramNameDefault()
{
PythonEngine.Initialize();
string s = PythonEngine.PythonHome;
Assert.NotNull(s);
PythonEngine.Shutdown();
}
/// <summary>
/// Test default behavior of PYTHONHOME. If ENVVAR is set it will
/// return the same value. If not, returns EmptyString.
/// </summary>
/// <remarks>
/// AppVeyor.yml has been update to tests with ENVVAR set.
/// </remarks>
[Test]
public static void GetPythonHomeDefault()
{
string envPythonHome = Environment.GetEnvironmentVariable("PYTHONHOME") ?? "";
PythonEngine.Initialize();
string enginePythonHome = PythonEngine.PythonHome;
Assert.AreEqual(envPythonHome, enginePythonHome);
PythonEngine.Shutdown();
}
[Test]
public void SetPythonHome()
{
// We needs to ensure that engine was started and shutdown at least once before setting dummy home.
// Otherwise engine will not run with dummy path with random problem.
if (!PythonEngine.IsInitialized)
{
PythonEngine.Initialize();
}
PythonEngine.Shutdown();
var pythonHomeBackup = PythonEngine.PythonHome;
var pythonHome = "/dummypath/";
PythonEngine.PythonHome = pythonHome;
PythonEngine.Initialize();
PythonEngine.Shutdown();
// Restoring valid pythonhome.
PythonEngine.PythonHome = pythonHomeBackup;
}
[Test]
public void SetPythonHomeTwice()
{
// We needs to ensure that engine was started and shutdown at least once before setting dummy home.
// Otherwise engine will not run with dummy path with random problem.
if (!PythonEngine.IsInitialized)
{
PythonEngine.Initialize();
}
PythonEngine.Shutdown();
var pythonHomeBackup = PythonEngine.PythonHome;
var pythonHome = "/dummypath/";
PythonEngine.PythonHome = "/dummypath2/";
PythonEngine.PythonHome = pythonHome;
PythonEngine.Initialize();
Assert.AreEqual(pythonHome, PythonEngine.PythonHome);
PythonEngine.Shutdown();
PythonEngine.PythonHome = pythonHomeBackup;
}
[Test]
public void SetProgramName()
{
if (PythonEngine.IsInitialized)
{
PythonEngine.Shutdown();
}
var programNameBackup = PythonEngine.ProgramName;
var programName = "FooBar";
PythonEngine.ProgramName = programName;
PythonEngine.Initialize();
Assert.AreEqual(programName, PythonEngine.ProgramName);
PythonEngine.Shutdown();
PythonEngine.ProgramName = programNameBackup;
}
[Test]
public void SetPythonPath()
{
string[] moduleNames = new string[] {
"subprocess",
};
string path;
using (Py.GIL())
{
// path should not be set to PythonEngine.PythonPath here.
// PythonEngine.PythonPath gets the default module search path, not the full search path.
// The list sys.path is initialized with this value on interpreter startup;
// it can be (and usually is) modified later to change the search path for loading modules.
// See https://docs.python.org/3/c-api/init.html#c.Py_GetPath
// After PythonPath is set, then PythonEngine.PythonPath will correctly return the full search path.
string[] paths = Py.Import("sys").GetAttr("path").As<string[]>();
path = string.Join(Path.PathSeparator.ToString(), paths);
TryToImport(moduleNames, "before setting PythonPath");
}
PythonEngine.PythonPath = path;
using (Py.GIL())
{
Assert.AreEqual(path, PythonEngine.PythonPath);
// Check that the modules remain loadable
TryToImport(moduleNames, "after setting PythonEngine.PythonPath");
}
}
string ListModules()
{
try
{
var pkg_resources = Py.Import("pkg_resources");
var locals = new PyDict();
locals.SetItem("pkg_resources", pkg_resources);
return PythonEngine.Eval(@"sorted(['%s==%s' % (i.key, i.version) for i in pkg_resources.working_set])", null, locals.Handle).ToString();
}
catch (PythonException ex)
{
return ex.ToString();
}
}
void CheckImport(string moduleName)
{
PythonEngine.Exec($@"
module_name = r'{moduleName}'
import sys
import importlib.util
if module_name not in sys.modules:
spec = importlib.util.find_spec(module_name)
if spec is None:
raise ImportError('find_spec returned None')
module = importlib.util.module_from_spec(spec)
sys.modules[module_name] = module
spec.loader.exec_module(module)
");
}
void TryToImport(IEnumerable<string> moduleNames, string message)
{
List<Exception> exceptions = new List<Exception>();
foreach (var moduleName in moduleNames)
{
var exception = TryToImport(moduleName, message);
if (exception != null) exceptions.Add(exception);
}
if (exceptions.Count > 0)
{
throw new AggregateException(exceptions);
}
}
Exception TryToImport(string moduleName, string message)
{
try
{
CheckImport(moduleName);
Py.Import(moduleName);
return null;
}
catch (PythonException ex)
{
string[] paths = Py.Import("sys").GetAttr("path").As<string[]>();
string path = string.Join(Path.PathSeparator.ToString(), paths);
string[] messages = paths.Where(p => p.Contains("site-packages")).Select(folder =>
(folder != null && Directory.Exists(folder)) ?
$" {folder} contains {string.Join(Path.PathSeparator.ToString(), Directory.EnumerateFileSystemEntries(folder).Select(fullName => Path.GetFileName(fullName)).ToArray())}" :
"").ToArray();
string folderContents = string.Join(" ", messages);
return new Exception($"Py.Import(\"{moduleName}\") failed {message}, sys.path={path}{folderContents} pkg_resources.working_set={ListModules()}", ex);
}
}
}
}