Add remaining tests to Xcode (#1256)

* Add classes in testutil and util to the project

  * Exclude util/iterator_adaptors_test which requires gmock
  * Exclude remote/serializer_test which is missing some paths

* Add iterator_adaptors_test and add gmock support

  * Add gmock support to the GoogleTest podspec we vendor
  * Add iterator_adaptors_test.cc to the Xcode project

* Add a script that verifies all tests are referenced in the project

* Add a travis check that all tests are referenced in the project

* Review feedback

* Moar feedback

1 files changed, 106 insertions, 0 deletions

diff --git a/scripts/check_test_inclusion.py b/scripts/check_test_inclusion.py
new file mode 100755
index 0000000..7f5f354
--- /dev/null
+++ b/scripts/check_test_inclusion.py
@@ -0,0 +1,106 @@
+#!/usr/bin/env python
+
+# Copyright 2018 Google
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Verifies that all tests are a part of the project file.
+"""
+
+from __future__ import print_function
+import os
+import os.path
+import re
+import sys
+
+
+# Tests that are known not to compile in Xcode and can't be added there.
+EXCLUDED = frozenset([
+    # b/79496027
+    "Firestore/core/test/firebase/firestore/remote/serializer_test.cc",
+])
+
+
+def Main():
+  """Runs the style check."""
+
+  tests = FindTestFiles("Firestore/Example/Tests", "Firestore/core/test")
+  problems = CheckProject(
+      "Firestore/Example/Firestore.xcodeproj/project.pbxproj", tests)
+
+  if problems:
+    Error("Test files exist that are unreferenced in Xcode project files:")
+    for problem in problems:
+      Error(problem)
+    sys.exit(1)
+
+  sys.exit(0)
+
+
+def FindTestFiles(*test_dirs):
+  """Searches the given source roots for test files.
+
+  Args:
+    *test_dirs: A list of directories containing test sources.
+
+  Returns:
+    A list of test source filenames.
+  """
+
+  test_file_pattern = re.compile(r"(?:Tests?\.mm?|_test\.(?:cc|mm))$")
+
+  result = []
+  for test_dir in test_dirs:
+    for root, dirs, files in os.walk(test_dir):
+      del dirs  # unused
+      for basename in files:
+        filename = os.path.join(root, basename)
+        if filename not in EXCLUDED and test_file_pattern.search(basename):
+          result.append(filename)
+  return result
+
+
+def CheckProject(project_file, test_files):
+  """Checks the given project file for tests in the given test_dirs.
+
+  Args:
+    project_file: The path to an Xcode pbxproj file.
+    test_files: A list of all tests source files in the project.
+
+  Returns:
+    A sorted list of filenames that aren't referenced in the project_file.
+  """
+
+  # An dict of basename to filename
+  basenames = {os.path.basename(f) : f for f in test_files}
+
+  file_list_pattern = re.compile(r"/\* (\S+) in Sources \*/")
+  with open(project_file, "r") as fd:
+    for line in fd:
+      line = line.rstrip()
+      m = file_list_pattern.search(line)
+      if m:
+        basename = m.group(1)
+        if basename in basenames:
+          del basenames[basename]
+
+  return sorted(basenames.values())
+
+
+def Error(message, *args):
+  message %= args
+  print(message, file=sys.stderr)
+
+
+if __name__ == "__main__":
+  Main()