Source

cpython_sandbox / Lib / test / test_runpy.py

Full commit
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
# Test the runpy module
import unittest
import os
import os.path
import sys
import re
import tempfile
import importlib
import py_compile
from test.support import (
    forget, make_legacy_pyc, run_unittest, unload, verbose, no_tracing,
    create_empty_file)
from test.script_helper import (
    make_pkg, make_script, make_zip_pkg, make_zip_script, temp_dir)


import runpy
from runpy import _run_code, _run_module_code, run_module, run_path
# Note: This module can't safely test _run_module_as_main as it
# runs its tests in the current process, which would mess with the
# real __main__ module (usually test.regrtest)
# See test_cmd_line_script for a test that executes that code path


# Set up the test code and expected results
example_source = """\
# Check basic code execution
result = ['Top level assignment']
def f():
    result.append('Lower level reference')
f()
del f
# Check the sys module
import sys
run_argv0 = sys.argv[0]
run_name_in_sys_modules = __name__ in sys.modules
module_in_sys_modules = (run_name_in_sys_modules and
                         globals() is sys.modules[__name__].__dict__)
# Check nested operation
import runpy
nested = runpy._run_module_code('x=1\\n', mod_name='<run>')
"""

implicit_namespace = {
    "__name__": None,
    "__file__": None,
    "__cached__": None,
    "__package__": None,
    "__doc__": None,
}
example_namespace =  {
    "sys": sys,
    "runpy": runpy,
    "result": ["Top level assignment", "Lower level reference"],
    "run_argv0": sys.argv[0],
    "run_name_in_sys_modules": False,
    "module_in_sys_modules": False,
    "nested": dict(implicit_namespace,
                   x=1, __name__="<run>", __loader__=None),
}
example_namespace.update(implicit_namespace)

class CodeExecutionMixin:
    # Issue #15230 (run_path not handling run_name correctly) highlighted a
    # problem with the way arguments were being passed from higher level APIs
    # down to lower level code. This mixin makes it easier to ensure full
    # testing occurs at those upper layers as well, not just at the utility
    # layer

    def assertNamespaceMatches(self, result_ns, expected_ns):
        """Check two namespaces match.

           Ignores any unspecified interpreter created names
        """
        # Impls are permitted to add extra names, so filter them out
        for k in list(result_ns):
            if k.startswith("__") and k.endswith("__"):
                if k not in expected_ns:
                    result_ns.pop(k)
                if k not in expected_ns["nested"]:
                    result_ns["nested"].pop(k)
        # Don't use direct dict comparison - the diffs are too hard to debug
        self.assertEqual(set(result_ns), set(expected_ns))
        for k in result_ns:
            actual = (k, result_ns[k])
            expected = (k, expected_ns[k])
            self.assertEqual(actual, expected)

    def check_code_execution(self, create_namespace, expected_namespace):
        """Check that an interface runs the example code correctly

           First argument is a callable accepting the initial globals and
           using them to create the actual namespace
           Second argument is the expected result
        """
        sentinel = object()
        expected_ns = expected_namespace.copy()
        run_name = expected_ns["__name__"]
        saved_argv0 = sys.argv[0]
        saved_mod = sys.modules.get(run_name, sentinel)
        # Check without initial globals
        result_ns = create_namespace(None)
        self.assertNamespaceMatches(result_ns, expected_ns)
        self.assertIs(sys.argv[0], saved_argv0)
        self.assertIs(sys.modules.get(run_name, sentinel), saved_mod)
        # And then with initial globals
        initial_ns = {"sentinel": sentinel}
        expected_ns["sentinel"] = sentinel
        result_ns = create_namespace(initial_ns)
        self.assertIsNot(result_ns, initial_ns)
        self.assertNamespaceMatches(result_ns, expected_ns)
        self.assertIs(sys.argv[0], saved_argv0)
        self.assertIs(sys.modules.get(run_name, sentinel), saved_mod)


class ExecutionLayerTestCase(unittest.TestCase, CodeExecutionMixin):
    """Unit tests for runpy._run_code and runpy._run_module_code"""

    def test_run_code(self):
        expected_ns = example_namespace.copy()
        expected_ns.update({
            "__loader__": None,
        })
        def create_ns(init_globals):
            return _run_code(example_source, {}, init_globals)
        self.check_code_execution(create_ns, expected_ns)

    def test_run_module_code(self):
        mod_name = "<Nonsense>"
        mod_fname = "Some other nonsense"
        mod_loader = "Now you're just being silly"
        mod_package = '' # Treat as a top level module
        expected_ns = example_namespace.copy()
        expected_ns.update({
            "__name__": mod_name,
            "__file__": mod_fname,
            "__loader__": mod_loader,
            "__package__": mod_package,
            "run_argv0": mod_fname,
            "run_name_in_sys_modules": True,
            "module_in_sys_modules": True,
        })
        def create_ns(init_globals):
            return _run_module_code(example_source,
                                    init_globals,
                                    mod_name,
                                    mod_fname,
                                    mod_loader,
                                    mod_package)
        self.check_code_execution(create_ns, expected_ns)

# TODO: Use self.addCleanup to get rid of a lot of try-finally blocks
class RunModuleTestCase(unittest.TestCase, CodeExecutionMixin):
    """Unit tests for runpy.run_module"""

    def expect_import_error(self, mod_name):
        try:
            run_module(mod_name)
        except ImportError:
            pass
        else:
            self.fail("Expected import error for " + mod_name)

    def test_invalid_names(self):
        # Builtin module
        self.expect_import_error("sys")
        # Non-existent modules
        self.expect_import_error("sys.imp.eric")
        self.expect_import_error("os.path.half")
        self.expect_import_error("a.bee")
        self.expect_import_error(".howard")
        self.expect_import_error("..eaten")
        # Package without __main__.py
        self.expect_import_error("multiprocessing")

    def test_library_module(self):
        self.assertEqual(run_module("runpy")["__name__"], "runpy")

    def _add_pkg_dir(self, pkg_dir):
        os.mkdir(pkg_dir)
        pkg_fname = os.path.join(pkg_dir, "__init__.py")
        create_empty_file(pkg_fname)
        return pkg_fname

    def _make_pkg(self, source, depth, mod_base="runpy_test"):
        pkg_name = "__runpy_pkg__"
        test_fname = mod_base+os.extsep+"py"
        pkg_dir = sub_dir = os.path.realpath(tempfile.mkdtemp())
        if verbose > 1: print("  Package tree in:", sub_dir)
        sys.path.insert(0, pkg_dir)
        if verbose > 1: print("  Updated sys.path:", sys.path[0])
        for i in range(depth):
            sub_dir = os.path.join(sub_dir, pkg_name)
            pkg_fname = self._add_pkg_dir(sub_dir)
            if verbose > 1: print("  Next level in:", sub_dir)
            if verbose > 1: print("  Created:", pkg_fname)
        mod_fname = os.path.join(sub_dir, test_fname)
        mod_file = open(mod_fname, "w")
        mod_file.write(source)
        mod_file.close()
        if verbose > 1: print("  Created:", mod_fname)
        mod_name = (pkg_name+".")*depth + mod_base
        return pkg_dir, mod_fname, mod_name

    def _del_pkg(self, top, depth, mod_name):
        for entry in list(sys.modules):
            if entry.startswith("__runpy_pkg__"):
                del sys.modules[entry]
        if verbose > 1: print("  Removed sys.modules entries")
        del sys.path[0]
        if verbose > 1: print("  Removed sys.path entry")
        for root, dirs, files in os.walk(top, topdown=False):
            for name in files:
                try:
                    os.remove(os.path.join(root, name))
                except OSError as ex:
                    if verbose > 1: print(ex) # Persist with cleaning up
            for name in dirs:
                fullname = os.path.join(root, name)
                try:
                    os.rmdir(fullname)
                except OSError as ex:
                    if verbose > 1: print(ex) # Persist with cleaning up
        try:
            os.rmdir(top)
            if verbose > 1: print("  Removed package tree")
        except OSError as ex:
            if verbose > 1: print(ex) # Persist with cleaning up

    def _fix_ns_for_legacy_pyc(self, ns, alter_sys):
        char_to_add = "c" if __debug__ else "o"
        ns["__file__"] += char_to_add
        if alter_sys:
            ns["run_argv0"] += char_to_add


    def _check_module(self, depth, alter_sys=False):
        pkg_dir, mod_fname, mod_name = (
               self._make_pkg(example_source, depth))
        forget(mod_name)
        expected_ns = example_namespace.copy()
        expected_ns.update({
            "__name__": mod_name,
            "__file__": mod_fname,
            "__package__": mod_name.rpartition(".")[0],
        })
        if alter_sys:
            expected_ns.update({
                "run_argv0": mod_fname,
                "run_name_in_sys_modules": True,
                "module_in_sys_modules": True,
            })
        def create_ns(init_globals):
            return run_module(mod_name, init_globals, alter_sys=alter_sys)
        try:
            if verbose > 1: print("Running from source:", mod_name)
            self.check_code_execution(create_ns, expected_ns)
            importlib.invalidate_caches()
            __import__(mod_name)
            os.remove(mod_fname)
            if not sys.dont_write_bytecode:
                make_legacy_pyc(mod_fname)
                unload(mod_name)  # In case loader caches paths
                importlib.invalidate_caches()
                if verbose > 1: print("Running from compiled:", mod_name)
                self._fix_ns_for_legacy_pyc(expected_ns, alter_sys)
                self.check_code_execution(create_ns, expected_ns)
        finally:
            self._del_pkg(pkg_dir, depth, mod_name)
        if verbose > 1: print("Module executed successfully")

    def _check_package(self, depth, alter_sys=False):
        pkg_dir, mod_fname, mod_name = (
               self._make_pkg(example_source, depth, "__main__"))
        pkg_name = mod_name.rpartition(".")[0]
        forget(mod_name)
        expected_ns = example_namespace.copy()
        expected_ns.update({
            "__name__": mod_name,
            "__file__": mod_fname,
            "__package__": pkg_name,
        })
        if alter_sys:
            expected_ns.update({
                "run_argv0": mod_fname,
                "run_name_in_sys_modules": True,
                "module_in_sys_modules": True,
            })
        def create_ns(init_globals):
            return run_module(pkg_name, init_globals, alter_sys=alter_sys)
        try:
            if verbose > 1: print("Running from source:", pkg_name)
            self.check_code_execution(create_ns, expected_ns)
            importlib.invalidate_caches()
            __import__(mod_name)
            os.remove(mod_fname)
            if not sys.dont_write_bytecode:
                make_legacy_pyc(mod_fname)
                unload(mod_name)  # In case loader caches paths
                if verbose > 1: print("Running from compiled:", pkg_name)
                importlib.invalidate_caches()
                self._fix_ns_for_legacy_pyc(expected_ns, alter_sys)
                self.check_code_execution(create_ns, expected_ns)
        finally:
            self._del_pkg(pkg_dir, depth, pkg_name)
        if verbose > 1: print("Package executed successfully")

    def _add_relative_modules(self, base_dir, source, depth):
        if depth <= 1:
            raise ValueError("Relative module test needs depth > 1")
        pkg_name = "__runpy_pkg__"
        module_dir = base_dir
        for i in range(depth):
            parent_dir = module_dir
            module_dir = os.path.join(module_dir, pkg_name)
        # Add sibling module
        sibling_fname = os.path.join(module_dir, "sibling.py")
        create_empty_file(sibling_fname)
        if verbose > 1: print("  Added sibling module:", sibling_fname)
        # Add nephew module
        uncle_dir = os.path.join(parent_dir, "uncle")
        self._add_pkg_dir(uncle_dir)
        if verbose > 1: print("  Added uncle package:", uncle_dir)
        cousin_dir = os.path.join(uncle_dir, "cousin")
        self._add_pkg_dir(cousin_dir)
        if verbose > 1: print("  Added cousin package:", cousin_dir)
        nephew_fname = os.path.join(cousin_dir, "nephew.py")
        create_empty_file(nephew_fname)
        if verbose > 1: print("  Added nephew module:", nephew_fname)

    def _check_relative_imports(self, depth, run_name=None):
        contents = r"""\
from __future__ import absolute_import
from . import sibling
from ..uncle.cousin import nephew
"""
        pkg_dir, mod_fname, mod_name = (
               self._make_pkg(contents, depth))
        if run_name is None:
            expected_name = mod_name
        else:
            expected_name = run_name
        try:
            self._add_relative_modules(pkg_dir, contents, depth)
            pkg_name = mod_name.rpartition('.')[0]
            if verbose > 1: print("Running from source:", mod_name)
            d1 = run_module(mod_name, run_name=run_name) # Read from source
            self.assertEqual(d1["__name__"], expected_name)
            self.assertEqual(d1["__package__"], pkg_name)
            self.assertIn("sibling", d1)
            self.assertIn("nephew", d1)
            del d1 # Ensure __loader__ entry doesn't keep file open
            importlib.invalidate_caches()
            __import__(mod_name)
            os.remove(mod_fname)
            if not sys.dont_write_bytecode:
                make_legacy_pyc(mod_fname)
                unload(mod_name)  # In case the loader caches paths
                if verbose > 1: print("Running from compiled:", mod_name)
                importlib.invalidate_caches()
                d2 = run_module(mod_name, run_name=run_name) # Read from bytecode
                self.assertEqual(d2["__name__"], expected_name)
                self.assertEqual(d2["__package__"], pkg_name)
                self.assertIn("sibling", d2)
                self.assertIn("nephew", d2)
                del d2 # Ensure __loader__ entry doesn't keep file open
        finally:
            self._del_pkg(pkg_dir, depth, mod_name)
        if verbose > 1: print("Module executed successfully")

    def test_run_module(self):
        for depth in range(4):
            if verbose > 1: print("Testing package depth:", depth)
            self._check_module(depth)

    def test_run_package(self):
        for depth in range(1, 4):
            if verbose > 1: print("Testing package depth:", depth)
            self._check_package(depth)

    def test_run_module_alter_sys(self):
        for depth in range(4):
            if verbose > 1: print("Testing package depth:", depth)
            self._check_module(depth, alter_sys=True)

    def test_run_package_alter_sys(self):
        for depth in range(1, 4):
            if verbose > 1: print("Testing package depth:", depth)
            self._check_package(depth, alter_sys=True)

    def test_explicit_relative_import(self):
        for depth in range(2, 5):
            if verbose > 1: print("Testing relative imports at depth:", depth)
            self._check_relative_imports(depth)

    def test_main_relative_import(self):
        for depth in range(2, 5):
            if verbose > 1: print("Testing main relative imports at depth:", depth)
            self._check_relative_imports(depth, "__main__")

    def test_run_name(self):
        depth = 1
        run_name = "And now for something completely different"
        pkg_dir, mod_fname, mod_name = (
               self._make_pkg(example_source, depth))
        forget(mod_name)
        expected_ns = example_namespace.copy()
        expected_ns.update({
            "__name__": run_name,
            "__file__": mod_fname,
            "__package__": mod_name.rpartition(".")[0],
        })
        def create_ns(init_globals):
            return run_module(mod_name, init_globals, run_name)
        try:
            self.check_code_execution(create_ns, expected_ns)
        finally:
            self._del_pkg(pkg_dir, depth, mod_name)

    def test_pkgutil_walk_packages(self):
        # This is a dodgy hack to use the test_runpy infrastructure to test
        # issue #15343. Issue #15348 declares this is indeed a dodgy hack ;)
        import pkgutil
        max_depth = 4
        base_name = "__runpy_pkg__"
        package_suffixes = ["uncle", "uncle.cousin"]
        module_suffixes = ["uncle.cousin.nephew", base_name + ".sibling"]
        expected_packages = set()
        expected_modules = set()
        for depth in range(1, max_depth):
            pkg_name = ".".join([base_name] * depth)
            expected_packages.add(pkg_name)
            for name in package_suffixes:
                expected_packages.add(pkg_name + "." + name)
            for name in module_suffixes:
                expected_modules.add(pkg_name + "." + name)
        pkg_name = ".".join([base_name] * max_depth)
        expected_packages.add(pkg_name)
        expected_modules.add(pkg_name + ".runpy_test")
        pkg_dir, mod_fname, mod_name = (
               self._make_pkg("", max_depth))
        self.addCleanup(self._del_pkg, pkg_dir, max_depth, mod_name)
        for depth in range(2, max_depth+1):
            self._add_relative_modules(pkg_dir, "", depth)
        for finder, mod_name, ispkg in pkgutil.walk_packages([pkg_dir]):
            self.assertIsInstance(finder,
                                  importlib.machinery.FileFinder)
            if ispkg:
                expected_packages.remove(mod_name)
            else:
                expected_modules.remove(mod_name)
        self.assertEqual(len(expected_packages), 0, expected_packages)
        self.assertEqual(len(expected_modules), 0, expected_modules)

class RunPathTestCase(unittest.TestCase, CodeExecutionMixin):
    """Unit tests for runpy.run_path"""

    def _make_test_script(self, script_dir, script_basename, source=None):
        if source is None:
            source = example_source
        return make_script(script_dir, script_basename, source)

    def _check_script(self, script_name, expected_name, expected_file,
                            expected_argv0):
        # First check is without run_name
        def create_ns(init_globals):
            return run_path(script_name, init_globals)
        expected_ns = example_namespace.copy()
        expected_ns.update({
            "__name__": expected_name,
            "__file__": expected_file,
            "__package__": "",
            "run_argv0": expected_argv0,
            "run_name_in_sys_modules": True,
            "module_in_sys_modules": True,
        })
        self.check_code_execution(create_ns, expected_ns)
        # Second check makes sure run_name works in all cases
        run_name = "prove.issue15230.is.fixed"
        def create_ns(init_globals):
            return run_path(script_name, init_globals, run_name)
        expected_ns["__name__"] = run_name
        expected_ns["__package__"] = run_name.rpartition(".")[0]
        self.check_code_execution(create_ns, expected_ns)

    def _check_import_error(self, script_name, msg):
        msg = re.escape(msg)
        self.assertRaisesRegex(ImportError, msg, run_path, script_name)

    def test_basic_script(self):
        with temp_dir() as script_dir:
            mod_name = 'script'
            script_name = self._make_test_script(script_dir, mod_name)
            self._check_script(script_name, "<run_path>", script_name,
                               script_name)

    def test_script_compiled(self):
        with temp_dir() as script_dir:
            mod_name = 'script'
            script_name = self._make_test_script(script_dir, mod_name)
            compiled_name = py_compile.compile(script_name, doraise=True)
            os.remove(script_name)
            self._check_script(compiled_name, "<run_path>", compiled_name,
                               compiled_name)

    def test_directory(self):
        with temp_dir() as script_dir:
            mod_name = '__main__'
            script_name = self._make_test_script(script_dir, mod_name)
            self._check_script(script_dir, "<run_path>", script_name,
                               script_dir)

    def test_directory_compiled(self):
        with temp_dir() as script_dir:
            mod_name = '__main__'
            script_name = self._make_test_script(script_dir, mod_name)
            compiled_name = py_compile.compile(script_name, doraise=True)
            os.remove(script_name)
            if not sys.dont_write_bytecode:
                legacy_pyc = make_legacy_pyc(script_name)
                self._check_script(script_dir, "<run_path>", legacy_pyc,
                                   script_dir)

    def test_directory_error(self):
        with temp_dir() as script_dir:
            mod_name = 'not_main'
            script_name = self._make_test_script(script_dir, mod_name)
            msg = "can't find '__main__' module in %r" % script_dir
            self._check_import_error(script_dir, msg)

    def test_zipfile(self):
        with temp_dir() as script_dir:
            mod_name = '__main__'
            script_name = self._make_test_script(script_dir, mod_name)
            zip_name, fname = make_zip_script(script_dir, 'test_zip', script_name)
            self._check_script(zip_name, "<run_path>", fname, zip_name)

    def test_zipfile_compiled(self):
        with temp_dir() as script_dir:
            mod_name = '__main__'
            script_name = self._make_test_script(script_dir, mod_name)
            compiled_name = py_compile.compile(script_name, doraise=True)
            zip_name, fname = make_zip_script(script_dir, 'test_zip',
                                              compiled_name)
            self._check_script(zip_name, "<run_path>", fname, zip_name)

    def test_zipfile_error(self):
        with temp_dir() as script_dir:
            mod_name = 'not_main'
            script_name = self._make_test_script(script_dir, mod_name)
            zip_name, fname = make_zip_script(script_dir, 'test_zip', script_name)
            msg = "can't find '__main__' module in %r" % zip_name
            self._check_import_error(zip_name, msg)

    @no_tracing
    def test_main_recursion_error(self):
        with temp_dir() as script_dir, temp_dir() as dummy_dir:
            mod_name = '__main__'
            source = ("import runpy\n"
                      "runpy.run_path(%r)\n") % dummy_dir
            script_name = self._make_test_script(script_dir, mod_name, source)
            zip_name, fname = make_zip_script(script_dir, 'test_zip', script_name)
            msg = "recursion depth exceeded"
            self.assertRaisesRegex(RuntimeError, msg, run_path, zip_name)

    def test_encoding(self):
        with temp_dir() as script_dir:
            filename = os.path.join(script_dir, 'script.py')
            with open(filename, 'w', encoding='latin1') as f:
                f.write("""
#coding:latin1
s = "non-ASCII: h\xe9"
""")
            result = run_path(filename)
            self.assertEqual(result['s'], "non-ASCII: h\xe9")


def test_main():
    run_unittest(
                 ExecutionLayerTestCase,
                 RunModuleTestCase,
                 RunPathTestCase
                 )

if __name__ == "__main__":
    test_main()