Add coverage

tools/telemetry/third_party/coverage/tests/test_execfile.py

+# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
+# For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt
+
+"""Tests for coverage.execfile"""
+
+import compileall
+import json
+import os
+import os.path
+import re
+import sys
+
+from coverage.backward import binary_bytes
+from coverage.execfile import run_python_file, run_python_module
+from coverage.misc import NoCode, NoSource
+
+from tests.coveragetest import CoverageTest
+
+HERE = os.path.dirname(__file__)
+
+
+class RunFileTest(CoverageTest):
+    """Test cases for `run_python_file`."""
+
+    def test_run_python_file(self):
+        tryfile = os.path.join(HERE, "try_execfile.py")
+        run_python_file(tryfile, [tryfile, "arg1", "arg2"])
+        mod_globs = json.loads(self.stdout())
+
+        # The file should think it is __main__
+        self.assertEqual(mod_globs['__name__'], "__main__")
+
+        # It should seem to come from a file named try_execfile.py
+        dunder_file = os.path.basename(mod_globs['__file__'])
+        self.assertEqual(dunder_file, "try_execfile.py")
+
+        # It should have its correct module data.
+        self.assertEqual(mod_globs['__doc__'].splitlines()[0],
+                            "Test file for run_python_file.")
+        self.assertEqual(mod_globs['DATA'], "xyzzy")
+        self.assertEqual(mod_globs['FN_VAL'], "my_fn('fooey')")
+
+        # It must be self-importable as __main__.
+        self.assertEqual(mod_globs['__main__.DATA'], "xyzzy")
+
+        # Argv should have the proper values.
+        self.assertEqual(mod_globs['argv'], [tryfile, "arg1", "arg2"])
+
+        # __builtins__ should have the right values, like open().
+        self.assertEqual(mod_globs['__builtins__.has_open'], True)
+
+    def test_no_extra_file(self):
+        # Make sure that running a file doesn't create an extra compiled file.
+        self.make_file("xxx", """\
+            desc = "a non-.py file!"
+            """)
+
+        self.assertEqual(os.listdir("."), ["xxx"])
+        run_python_file("xxx", ["xxx"])
+        self.assertEqual(os.listdir("."), ["xxx"])
+
+    def test_universal_newlines(self):
+        # Make sure we can read any sort of line ending.
+        pylines = """# try newlines|print('Hello, world!')|""".split('|')
+        for nl in ('\n', '\r\n', '\r'):
+            with open('nl.py', 'wb') as fpy:
+                fpy.write(nl.join(pylines).encode('utf-8'))
+            run_python_file('nl.py', ['nl.py'])
+        self.assertEqual(self.stdout(), "Hello, world!\n"*3)
+
+    def test_missing_final_newline(self):
+        # Make sure we can deal with a Python file with no final newline.
+        self.make_file("abrupt.py", """\
+            if 1:
+                a = 1
+                print("a is %r" % a)
+                #""")
+        with open("abrupt.py") as f:
+            abrupt = f.read()
+        self.assertEqual(abrupt[-1], '#')
+        run_python_file("abrupt.py", ["abrupt.py"])
+        self.assertEqual(self.stdout(), "a is 1\n")
+
+    def test_no_such_file(self):
+        with self.assertRaises(NoSource):
+            run_python_file("xyzzy.py", [])
+
+    def test_directory_with_main(self):
+        self.make_file("with_main/__main__.py", """\
+            print("I am __main__")
+            """)
+        run_python_file("with_main", ["with_main"])
+        self.assertEqual(self.stdout(), "I am __main__\n")
+
+    def test_directory_without_main(self):
+        self.make_file("without_main/__init__.py", "")
+        with self.assertRaisesRegex(NoSource, "Can't find '__main__' module in 'without_main'"):
+            run_python_file("without_main", ["without_main"])
+
+
+class RunPycFileTest(CoverageTest):
+    """Test cases for `run_python_file`."""
+
+    def make_pyc(self):
+        """Create a .pyc file, and return the relative path to it."""
+        self.make_file("compiled.py", """\
+            def doit():
+                print("I am here!")
+
+            doit()
+            """)
+        compileall.compile_dir(".", quiet=True)
+        os.remove("compiled.py")
+
+        # Find the .pyc file!
+        for there, _, files in os.walk("."):            # pragma: part covered
+            for f in files:
+                if f.endswith(".pyc"):                  # pragma: part covered
+                    return os.path.join(there, f)
+
+    def test_running_pyc(self):
+        pycfile = self.make_pyc()
+        run_python_file(pycfile, [pycfile])
+        self.assertEqual(self.stdout(), "I am here!\n")
+
+    def test_running_pyo(self):
+        pycfile = self.make_pyc()
+        pyofile = re.sub(r"[.]pyc$", ".pyo", pycfile)
+        self.assertNotEqual(pycfile, pyofile)
+        os.rename(pycfile, pyofile)
+        run_python_file(pyofile, [pyofile])
+        self.assertEqual(self.stdout(), "I am here!\n")
+
+    def test_running_pyc_from_wrong_python(self):
+        pycfile = self.make_pyc()
+
+        # Jam Python 2.1 magic number into the .pyc file.
+        with open(pycfile, "r+b") as fpyc:
+            fpyc.seek(0)
+            fpyc.write(binary_bytes([0x2a, 0xeb, 0x0d, 0x0a]))
+
+        with self.assertRaisesRegex(NoCode, "Bad magic number in .pyc file"):
+            run_python_file(pycfile, [pycfile])
+
+    def test_no_such_pyc_file(self):
+        with self.assertRaisesRegex(NoCode, "No file to run: 'xyzzy.pyc'"):
+            run_python_file("xyzzy.pyc", [])
+
+
+class RunModuleTest(CoverageTest):
+    """Test run_python_module."""
+
+    run_in_temp_dir = False
+
+    def setUp(self):
+        super(RunModuleTest, self).setUp()
+        # Parent class saves and restores sys.path, we can just modify it.
+        sys.path.append(self.nice_file(os.path.dirname(__file__), 'modules'))
+
+    def test_runmod1(self):
+        run_python_module("runmod1", ["runmod1", "hello"])
+        self.assertEqual(self.stderr(), "")
+        self.assertEqual(self.stdout(), "runmod1: passed hello\n")
+
+    def test_runmod2(self):
+        run_python_module("pkg1.runmod2", ["runmod2", "hello"])
+        self.assertEqual(self.stderr(), "")
+        self.assertEqual(self.stdout(), "runmod2: passed hello\n")
+
+    def test_runmod3(self):
+        run_python_module("pkg1.sub.runmod3", ["runmod3", "hello"])
+        self.assertEqual(self.stderr(), "")
+        self.assertEqual(self.stdout(), "runmod3: passed hello\n")
+
+    def test_pkg1_main(self):
+        run_python_module("pkg1", ["pkg1", "hello"])
+        self.assertEqual(self.stderr(), "")
+        self.assertEqual(self.stdout(), "pkg1.__main__: passed hello\n")
+
+    def test_pkg1_sub_main(self):
+        run_python_module("pkg1.sub", ["pkg1.sub", "hello"])
+        self.assertEqual(self.stderr(), "")
+        self.assertEqual(self.stdout(), "pkg1.sub.__main__: passed hello\n")
+
+    def test_no_such_module(self):
+        with self.assertRaises(NoSource):
+            run_python_module("i_dont_exist", [])
+        with self.assertRaises(NoSource):
+            run_python_module("i.dont_exist", [])
+        with self.assertRaises(NoSource):
+            run_python_module("i.dont.exist", [])
+
+    def test_no_main(self):
+        with self.assertRaises(NoSource):
+            run_python_module("pkg2", ["pkg2", "hi"])