Changing enivronment to Python2.7 cannot find test.

[ttSpace]

Environment data

Version: 1.60.0-insider (user setup)
Commit: 699084fdb48460c68086b85b5c08f3d39055e772
Date: 2021-08-12T19:13:28.730Z
Electron: 13.1.8
Chrome: 91.0.4472.164
Node.js: 14.16.0
V8: 9.1.269.39-electron.0
OS: Windows_NT x64 10.0.17134

Build of python-insider: 2021.9.1125171759-dev
Build of jupyter-insider: 2021.8.2025984474

Expected behaviour

Tests are discovered.

Actual behaviour

Change enivronment to Python2.7. Test Discovery Failed with no error message. I try to Click "Enable and configure a test framework" -> Select "Unittest" and next ". Root directory" -> Select first test file name format *test.py. Nothing happened.
By the way, changing enivronment to Anaconda can find tests successfully.

Steps to reproduce:

1. Input below code:

import unittest
class PassingTests(unittest.TestCase):
    def test_passing(self):
        self.assertEqual(42, 42)
    def test_passing_still(self):
        self.assertEqual("silly walk", "silly walk")
class FailingTests(unittest.TestCase):
    def test_failure(self):
        self.assertEqual(42, -13)
    def test_failure_still(self):
        self.assertEqual("I'm right!", "no, I am!")

2. Run tests with unittest framework.

 "python.testing.unittestEnabled": true

3. Run command: "Run All Tests".
4. Change enivronment to Python2.7.

Logs

Output for Python in the Output panel (View→Output, change the drop-down the upper-right of the Output panel to Python)

User belongs to experiment group 'pythonaa'
User belongs to experiment group 'pythonJediLSP'
User belongs to experiment group 'pythonDiscoveryModuleWithoutWatcher'
User belongs to experiment group 'pythonTensorboardExperiment'
User belongs to experiment group 'PythonPyTorchProfiler'
User belongs to experiment group 'pythonDeprecatePythonPath'
User belongs to experiment group 'pythonSortEnvs'
Python interpreter path: C:\Python39-64\python.exe
Starting Pylance language server.
Error 2021-08-13 06:45:27: Failed to check if file needs to be fixed [EntryNotFound (FileSystemError): Unable to read file 'c:\Users\vting\AppData\Roaming\Code - Insiders\User\settings.json' (Error: Unable to resolve non-existing file 'c:\Users\vting\AppData\Roaming\Code - Insiders\User\settings.json')
	at _handleError (c:\Users\vting\AppData\Local\Programs\Microsoft VS Code Insiders\resources\app\out\vs\workbench\services\extensions\node\extensionHostProcess.js:85:159261)
	at processTicksAndRejections (internal/process/task_queues.js:93:5)
	at async y.readText (c:\Users\vting\.vscode-insiders\extensions\ms-python.python-2021.9.1125171759-dev\out\client\extension.js:9:338733)
	at async p.doesFileNeedToBeFixed (c:\Users\vting\.vscode-insiders\extensions\ms-python.python-2021.9.1125171759-dev\out\client\extension.js:59:559685)
	at async c:\Users\vting\.vscode-insiders\extensions\ms-python.python-2021.9.1125171759-dev\out\client\extension.js:59:558812
	at async Promise.all (index 0)
	at async p.getFilesToBeFixed (c:\Users\vting\.vscode-insiders\extensions\ms-python.python-2021.9.1125171759-dev\out\client\extension.js:59:558758)
	at async p.updateTestSettings (c:\Users\vting\.vscode-insiders\extensions\ms-python.python-2021.9.1125171759-dev\out\client\extension.js:59:558385)] {
  code: 'FileNotFound'
}
> C:\Python39-64\python.exe -c "
import unittest
import inspect

def get_sourceline(obj):
    s, n = inspect.getsourcelines(obj)
    for i, v in enumerate(s):
        if v.strip().startswith('def'):
            return str(n+i)
    return '*'

def generate_test_cases(suite):
    for test in suite:
        if isinstance(test, unittest.TestCase):
            yield test
        else:
            yield from generate_test_cases(test)

loader = unittest.TestLoader()
suite = loader.discover(".", pattern="*test.py")

print("start")  # Don't remove this line
loader_errors = []
for s in generate_test_cases(suite):
    tm = getattr(s, s._testMethodName)
    testId = s.id()
    if testId.startswith("unittest.loader._FailedTest"):
        loader_errors.append(s._exception)
    else:
        print(testId.replace(".", ":") + ":" + get_sourceline(tm))

for error in loader_errors:
    try:
        print("=== exception start ===")
        print(error.msg)
        print("=== exception end ===")
    except:
        pass
"
cwd: c:\Users\vting\Downloads\Test2
> C:\Python39-64\python.exe -c "
import unittest
import inspect

def get_sourceline(obj):
    s, n = inspect.getsourcelines(obj)
    for i, v in enumerate(s):
        if v.strip().startswith('def'):
            return str(n+i)
    return '*'

def generate_test_cases(suite):
    for test in suite:
        if isinstance(test, unittest.TestCase):
            yield test
        else:
            yield from generate_test_cases(test)

loader = unittest.TestLoader()
suite = loader.discover(".", pattern="*test.py")

print("start")  # Don't remove this line
loader_errors = []
for s in generate_test_cases(suite):
    tm = getattr(s, s._testMethodName)
    testId = s.id()
    if testId.startswith("unittest.loader._FailedTest"):
        loader_errors.append(s._exception)
    else:
        print(testId.replace(".", ":") + ":" + get_sourceline(tm))

for error in loader_errors:
    try:
        print("=== exception start ===")
        print(error.msg)
        print("=== exception end ===")
    except:
        pass
"
cwd: c:\Users\vting\Downloads\Test2
Python interpreter path: C:\ProgramData\Anaconda3\python.exe
> C:\ProgramData\Anaconda3\python.exe -c "
import unittest
import inspect

def get_sourceline(obj):
    s, n = inspect.getsourcelines(obj)
    for i, v in enumerate(s):
        if v.strip().startswith('def'):
            return str(n+i)
    return '*'

def generate_test_cases(suite):
    for test in suite:
        if isinstance(test, unittest.TestCase):
            yield test
        else:
            yield from generate_test_cases(test)

loader = unittest.TestLoader()
suite = loader.discover(".", pattern="*test.py")

print("start")  # Don't remove this line
loader_errors = []
for s in generate_test_cases(suite):
    tm = getattr(s, s._testMethodName)
    testId = s.id()
    if testId.startswith("unittest.loader._FailedTest"):
        loader_errors.append(s._exception)
    else:
        print(testId.replace(".", ":") + ":" + get_sourceline(tm))

for error in loader_errors:
    try:
        print("=== exception start ===")
        print(error.msg)
        print("=== exception end ===")
    except:
        pass
"
cwd: c:\Users\vting\Downloads\Test2
Python interpreter path: C:\Python27-64\python.exe
> C:\Python27-64\python.exe -c "
import unittest
import inspect

def get_sourceline(obj):
    s, n = inspect.getsourcelines(obj)
    for i, v in enumerate(s):
        if v.strip().startswith('def'):
            return str(n+i)
    return '*'

def generate_test_cases(suite):
    for test in suite:
        if isinstance(test, unittest.TestCase):
            yield test
        else:
            yield from generate_test_cases(test)

loader = unittest.TestLoader()
suite = loader.discover(".", pattern="*test.py")

print("start")  # Don't remove this line
loader_errors = []
for s in generate_test_cases(suite):
    tm = getattr(s, s._testMethodName)
    testId = s.id()
    if testId.startswith("unittest.loader._FailedTest"):
        loader_errors.append(s._exception)
    else:
        print(testId.replace(".", ":") + ":" + get_sourceline(tm))

for error in loader_errors:
    try:
        print("=== exception start ===")
        print(error.msg)
        print("=== exception end ===")
    except:
        pass
"
cwd: c:\Users\vting\Downloads\Test2
> C:\Python27-64\python.exe -c "
import unittest
import inspect

def get_sourceline(obj):
    s, n = inspect.getsourcelines(obj)
    for i, v in enumerate(s):
        if v.strip().startswith('def'):
            return str(n+i)
    return '*'

def generate_test_cases(suite):
    for test in suite:
        if isinstance(test, unittest.TestCase):
            yield test
        else:
            yield from generate_test_cases(test)

loader = unittest.TestLoader()
suite = loader.discover(".", pattern="*test.py")

print("start")  # Don't remove this line
loader_errors = []
for s in generate_test_cases(suite):
    tm = getattr(s, s._testMethodName)
    testId = s.id()
    if testId.startswith("unittest.loader._FailedTest"):
        loader_errors.append(s._exception)
    else:
        print(testId.replace(".", ":") + ":" + get_sourceline(tm))

for error in loader_errors:
    try:
        print("=== exception start ===")
        print(error.msg)
        print("=== exception end ===")
    except:
        pass
"
cwd: c:\Users\vting\Downloads\Test2
> C:\Python27-64\python.exe -c "
import unittest
import inspect

def get_sourceline(obj):
    s, n = inspect.getsourcelines(obj)
    for i, v in enumerate(s):
        if v.strip().startswith('def'):
            return str(n+i)
    return '*'

def generate_test_cases(suite):
    for test in suite:
        if isinstance(test, unittest.TestCase):
            yield test
        else:
            yield from generate_test_cases(test)

loader = unittest.TestLoader()
suite = loader.discover(".", pattern="*test.py")

print("start")  # Don't remove this line
loader_errors = []
for s in generate_test_cases(suite):
    tm = getattr(s, s._testMethodName)
    testId = s.id()
    if testId.startswith("unittest.loader._FailedTest"):
        loader_errors.append(s._exception)
    else:
        print(testId.replace(".", ":") + ":" + get_sourceline(tm))

for error in loader_errors:
    try:
        print("=== exception start ===")
        print(error.msg)
        print("=== exception end ===")
    except:
        pass
"
cwd: c:\Users\vting\Downloads\Test2
> C:\Python27-64\python.exe -c "
import unittest
import inspect

def get_sourceline(obj):
    s, n = inspect.getsourcelines(obj)
    for i, v in enumerate(s):
        if v.strip().startswith('def'):
            return str(n+i)
    return '*'

def generate_test_cases(suite):
    for test in suite:
        if isinstance(test, unittest.TestCase):
            yield test
        else:
            yield from generate_test_cases(test)

loader = unittest.TestLoader()
suite = loader.discover(".", pattern="*test.py")

print("start")  # Don't remove this line
loader_errors = []
for s in generate_test_cases(suite):
    tm = getattr(s, s._testMethodName)
    testId = s.id()
    if testId.startswith("unittest.loader._FailedTest"):
        loader_errors.append(s._exception)
    else:
        print(testId.replace(".", ":") + ":" + get_sourceline(tm))

for error in loader_errors:
    try:
        print("=== exception start ===")
        print(error.msg)
        print("=== exception end ===")
    except:
        pass
"
cwd: c:\Users\vting\Downloads\Test2

[karthiknadig]

Thanks for the report. I was able to repro this.