init

.venv/lib/python3.8/site-packages/mypy/test/testcmdline.py

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+"""Test cases for the command line.
+
+To begin we test that "mypy <directory>[/]" always recurses down the
+whole tree.
+"""
+
+import os
+import re
+import subprocess
+import sys
+
+from typing import List
+from typing import Optional
+
+from mypy.test.config import test_temp_dir, PREFIX
+from mypy.test.data import DataDrivenTestCase, DataSuite
+from mypy.test.helpers import (
+    assert_string_arrays_equal, normalize_error_messages, check_test_output_files
+)
+
+# Path to Python 3 interpreter
+python3_path = sys.executable
+
+# Files containing test case descriptions.
+cmdline_files = [
+    'cmdline.test',
+    'cmdline.pyproject.test',
+    'reports.test',
+    'envvars.test',
+]
+
+
+class PythonCmdlineSuite(DataSuite):
+    files = cmdline_files
+    native_sep = True
+
+    def run_case(self, testcase: DataDrivenTestCase) -> None:
+        for step in [1] + sorted(testcase.output2):
+            test_python_cmdline(testcase, step)
+
+
+def test_python_cmdline(testcase: DataDrivenTestCase, step: int) -> None:
+    assert testcase.old_cwd is not None, "test was not properly set up"
+    # Write the program to a file.
+    program = '_program.py'
+    program_path = os.path.join(test_temp_dir, program)
+    with open(program_path, 'w', encoding='utf8') as file:
+        for s in testcase.input:
+            file.write('{}\n'.format(s))
+    args = parse_args(testcase.input[0])
+    custom_cwd = parse_cwd(testcase.input[1]) if len(testcase.input) > 1 else None
+    args.append('--show-traceback')
+    if '--error-summary' not in args:
+        args.append('--no-error-summary')
+    # Type check the program.
+    fixed = [python3_path, '-m', 'mypy']
+    env = os.environ.copy()
+    env.pop('COLUMNS', None)
+    env['PYTHONPATH'] = PREFIX
+    process = subprocess.Popen(fixed + args,
+                               stdout=subprocess.PIPE,
+                               stderr=subprocess.PIPE,
+                               cwd=os.path.join(
+                                   test_temp_dir,
+                                   custom_cwd or ""
+                                   ),
+                               env=env)
+    outb, errb = process.communicate()
+    result = process.returncode
+    # Split output into lines.
+    out = [s.rstrip('\n\r') for s in str(outb, 'utf8').splitlines()]
+    err = [s.rstrip('\n\r') for s in str(errb, 'utf8').splitlines()]
+
+    if "PYCHARM_HOSTED" in os.environ:
+        for pos, line in enumerate(err):
+            if line.startswith('pydev debugger: '):
+                # Delete the attaching debugger message itself, plus the extra newline added.
+                del err[pos:pos + 2]
+                break
+
+    # Remove temp file.
+    os.remove(program_path)
+    # Compare actual output to expected.
+    if testcase.output_files:
+        # Ignore stdout, but we insist on empty stderr and zero status.
+        if err or result:
+            raise AssertionError(
+                'Expected zero status and empty stderr%s, got %d and\n%s' %
+                (' on step %d' % step if testcase.output2 else '',
+                 result, '\n'.join(err + out)))
+        check_test_output_files(testcase, step)
+    else:
+        if testcase.normalize_output:
+            out = normalize_error_messages(err + out)
+        obvious_result = 1 if out else 0
+        if obvious_result != result:
+            out.append('== Return code: {}'.format(result))
+        expected_out = testcase.output if step == 1 else testcase.output2[step]
+        # Strip "tmp/" out of the test so that # E: works...
+        expected_out = [s.replace("tmp" + os.sep, "") for s in expected_out]
+        assert_string_arrays_equal(expected_out, out,
+                                   'Invalid output ({}, line {}){}'.format(
+                                       testcase.file, testcase.line,
+                                       ' on step %d' % step if testcase.output2 else ''))
+
+
+def parse_args(line: str) -> List[str]:
+    """Parse the first line of the program for the command line.
+
+    This should have the form
+
+      # cmd: mypy <options>
+
+    For example:
+
+      # cmd: mypy pkg/
+    """
+    m = re.match('# cmd: mypy (.*)$', line)
+    if not m:
+        return []  # No args; mypy will spit out an error.
+    return m.group(1).split()
+
+
+def parse_cwd(line: str) -> Optional[str]:
+    """Parse the second line of the program for the command line.
+
+    This should have the form
+
+      # cwd: <directory>
+
+    For example:
+
+      # cwd: main/subdir
+    """
+    m = re.match('# cwd: (.*)$', line)
+    return m.group(1) if m else None