Move all Firestore Objective-C to Objective-C++ (#734)

* Move all Firestore files to Objective-C++
* Update project file references
* Don't use module imports from Objective-C++
* Use extern "C" for C-accessible globals
* Work around more stringent type checking in Objective-C++
  * NSMutableDictionary ivars aren't implicitly casted to NSDictionary
  * FSTMaybeDocument callback can't be passed a function that accepts
    FSTDocument
  * NSComparisonResult can't be multiplied by -1 without casting
* Add a #include <inttypes.h> where needed
* Avoid using C++ keywords as variables
* Remove #if __cplusplus guards

1 files changed, 59 insertions, 0 deletions

diff --git a/Firestore/Example/Tests/Core/FSTDatabaseInfoTests.mm b/Firestore/Example/Tests/Core/FSTDatabaseInfoTests.mm
new file mode 100644
index 0000000..c7cf22a
--- /dev/null
+++ b/Firestore/Example/Tests/Core/FSTDatabaseInfoTests.mm
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2017 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.
+ */
+
+#import "Firestore/Source/Core/FSTDatabaseInfo.h"
+
+#import <XCTest/XCTest.h>
+
+#import "Firestore/Source/Model/FSTDatabaseID.h"
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface FSTDatabaseInfoTests : XCTestCase
+@end
+
+@implementation FSTDatabaseInfoTests
+
+- (void)testConstructor {
+  FSTDatabaseID *databaseID = [FSTDatabaseID databaseIDWithProject:@"p" database:@"d"];
+  FSTDatabaseInfo *databaseInfo = [FSTDatabaseInfo databaseInfoWithDatabaseID:databaseID
+                                                               persistenceKey:@"pk"
+                                                                         host:@"h"
+                                                                   sslEnabled:YES];
+  XCTAssertEqualObjects(databaseInfo.databaseID.projectID, @"p");
+  XCTAssertEqualObjects(databaseInfo.databaseID.databaseID, @"d");
+  XCTAssertEqualObjects(databaseInfo.persistenceKey, @"pk");
+  XCTAssertEqualObjects(databaseInfo.host, @"h");
+  XCTAssertEqual(databaseInfo.sslEnabled, YES);
+}
+
+- (void)testDefaultDatabase {
+  FSTDatabaseID *databaseID =
+      [FSTDatabaseID databaseIDWithProject:@"p" database:kDefaultDatabaseID];
+  FSTDatabaseInfo *databaseInfo = [FSTDatabaseInfo databaseInfoWithDatabaseID:databaseID
+                                                               persistenceKey:@"pk"
+                                                                         host:@"h"
+                                                                   sslEnabled:YES];
+  XCTAssertEqualObjects(databaseInfo.databaseID.projectID, @"p");
+  XCTAssertEqualObjects(databaseInfo.databaseID.databaseID, @"(default)");
+  XCTAssertEqualObjects(databaseInfo.persistenceKey, @"pk");
+  XCTAssertEqualObjects(databaseInfo.host, @"h");
+  XCTAssertEqual(databaseInfo.sslEnabled, YES);
+}
+
+@end
+
+NS_ASSUME_NONNULL_END