[fusl] Add llvm's lit tool to third_party

third_party/lit/lit/formats/googletest.py

Index: third_party/lit/lit/formats/googletest.py
diff --git a/third_party/lit/lit/formats/googletest.py b/third_party/lit/lit/formats/googletest.py
new file mode 100644
index 0000000000000000000000000000000000000000..3ce57917113aa9bd9dd03d229f5bf320dbf4e3fd
--- /dev/null
+++ b/third_party/lit/lit/formats/googletest.py
@@ -0,0 +1,125 @@
+from __future__ import absolute_import
+import os
+import sys
+
+import lit.Test
+import lit.TestRunner
+import lit.util
+from .base import TestFormat
+
+kIsWindows = sys.platform in ['win32', 'cygwin']
+
+class GoogleTest(TestFormat):
+    def __init__(self, test_sub_dir, test_suffix):
+        self.test_sub_dir = os.path.normcase(str(test_sub_dir)).split(';')
+        self.test_suffix = str(test_suffix)
+
+        # On Windows, assume tests will also end in '.exe'.
+        if kIsWindows:
+            self.test_suffix += '.exe'
+
+    def getGTestTests(self, path, litConfig, localConfig):
+        """getGTestTests(path) - [name]
+
+        Return the tests available in gtest executable.
+
+        Args:
+          path: String path to a gtest executable
+          litConfig: LitConfig instance
+          localConfig: TestingConfig instance"""
+
+        try:
+            lines = lit.util.capture([path, '--gtest_list_tests'],
+                                     env=localConfig.environment)
+            if kIsWindows:
+              lines = lines.replace('\r', '')
+            lines = lines.split('\n')
+        except:
+            litConfig.error("unable to discover google-tests in %r" % path)
+            raise StopIteration
+
+        nested_tests = []
+        for ln in lines:
+            if not ln.strip():
+                continue
+
+            prefix = ''
+            index = 0
+            while ln[index*2:index*2+2] == '  ':
+                index += 1
+            while len(nested_tests) > index:
+                nested_tests.pop()
+
+            ln = ln[index*2:]
+            if ln.endswith('.'):
+                nested_tests.append(ln)
+            elif any([name.startswith('DISABLED_')
+                      for name in nested_tests + [ln]]):
+                # Gtest will internally skip these tests. No need to launch a
+                # child process for it.
+                continue
+            else:
+                yield ''.join(nested_tests) + ln
+
+    # Note: path_in_suite should not include the executable name.
+    def getTestsInExecutable(self, testSuite, path_in_suite, execpath,
+                             litConfig, localConfig):
+        if not execpath.endswith(self.test_suffix):
+            return
+        (dirname, basename) = os.path.split(execpath)
+        # Discover the tests in this executable.
+        for testname in self.getGTestTests(execpath, litConfig, localConfig):
+            testPath = path_in_suite + (basename, testname)
+            yield lit.Test.Test(testSuite, testPath, localConfig, file_path=execpath)
+
+    def getTestsInDirectory(self, testSuite, path_in_suite,
+                            litConfig, localConfig):
+        source_path = testSuite.getSourcePath(path_in_suite)
+        for filename in os.listdir(source_path):
+            filepath = os.path.join(source_path, filename)
+            if os.path.isdir(filepath):
+                # Iterate over executables in a directory.
+                if not os.path.normcase(filename) in self.test_sub_dir:
+                    continue
+                dirpath_in_suite = path_in_suite + (filename, )
+                for subfilename in os.listdir(filepath):
+                    execpath = os.path.join(filepath, subfilename)
+                    for test in self.getTestsInExecutable(
+                            testSuite, dirpath_in_suite, execpath,
+                            litConfig, localConfig):
+                      yield test
+            elif ('.' in self.test_sub_dir):
+                for test in self.getTestsInExecutable(
+                        testSuite, path_in_suite, filepath,
+                        litConfig, localConfig):
+                    yield test
+
+    def execute(self, test, litConfig):
+        testPath,testName = os.path.split(test.getSourcePath())
+        while not os.path.exists(testPath):
+            # Handle GTest parametrized and typed tests, whose name includes
+            # some '/'s.
+            testPath, namePrefix = os.path.split(testPath)
+            testName = namePrefix + '/' + testName
+
+        cmd = [testPath, '--gtest_filter=' + testName]
+        if litConfig.useValgrind:
+            cmd = litConfig.valgrindArgs + cmd
+
+        if litConfig.noExecute:
+            return lit.Test.PASS, ''
+
+        out, err, exitCode = lit.util.executeCommand(
+            cmd, env=test.config.environment)
+
+        if exitCode:
+            return lit.Test.FAIL, out + err
+
+        passing_test_line = '[  PASSED  ] 1 test.'
+        if passing_test_line not in out:
+            msg = ('Unable to find %r in gtest output:\n\n%s%s' %
+                   (passing_test_line, out, err))
+            return lit.Test.UNRESOLVED, msg
+
+        return lit.Test.PASS,''
+