implement C++ assert (stdio, apple) (#612)

* implement C++ assert (stdio, apple)

* Update tests for firebase_firestore_util renames

* renaming `assert.h` to `firebase_assert.h`

* refactoring to a common `WrapNSStringNoCopy()`

2 files changed, 66 insertions, 0 deletions

diff --git a/Firestore/core/test/firebase/firestore/util/CMakeLists.txt b/Firestore/core/test/firebase/firestore/util/CMakeLists.txt
index 5e10715..e51bb51 100644
--- a/Firestore/core/test/firebase/firestore/util/CMakeLists.txt
+++ b/Firestore/core/test/firebase/firestore/util/CMakeLists.txt
@@ -26,6 +26,7 @@ target_link_libraries(
 if(APPLE)
   cc_test(
     firebase_firestore_util_apple_test
+    assert_test.cc
     log_test.cc
   )
   target_link_libraries(
@@ -36,6 +37,7 @@ endif(APPLE)
 
 cc_test(
   firebase_firestore_util_stdio_test
+  assert_test.cc
   log_test.cc
 )
 target_link_libraries(
diff --git a/Firestore/core/test/firebase/firestore/util/assert_test.cc b/Firestore/core/test/firebase/firestore/util/assert_test.cc
new file mode 100644
index 0000000..7c49462
--- /dev/null
+++ b/Firestore/core/test/firebase/firestore/util/assert_test.cc
@@ -0,0 +1,64 @@
+/*
+ * 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.
+ */
+
+#include "Firestore/core/src/firebase/firestore/util/firebase_assert.h"
+
+#include <exception>
+
+#include "gtest/gtest.h"
+
+namespace firebase {
+namespace firestore {
+namespace util {
+
+namespace {
+
+void AssertWithExpression(bool condition) {
+  FIREBASE_ASSERT_WITH_EXPRESSION(condition, 1 + 2 + 3);
+}
+
+void Assert(bool condition) {
+  FIREBASE_ASSERT(condition == true);
+}
+
+void AssertMessageWithExpression(bool condition) {
+  FIREBASE_ASSERT_MESSAGE_WITH_EXPRESSION(condition, 1 + 2 + 3, "connection %s",
+                                          condition ? "succeeded" : "failed");
+}
+
+}  // namespace
+
+TEST(Assert, WithExpression) {
+  AssertWithExpression(true);
+
+  EXPECT_ANY_THROW(AssertWithExpression(false));
+}
+
+TEST(Assert, Vanilla) {
+  Assert(true);
+
+  EXPECT_ANY_THROW(Assert(false));
+}
+
+TEST(Assert, WithMessageAndExpression) {
+  AssertMessageWithExpression(true);
+
+  EXPECT_ANY_THROW(AssertMessageWithExpression(false));
+}
+
+}  //  namespace util
+}  //  namespace firestore
+}  //  namespace firebase