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, 75 insertions, 0 deletions

diff --git a/Firestore/Example/Tests/Integration/API/FIRTypeTests.mm b/Firestore/Example/Tests/Integration/API/FIRTypeTests.mm
new file mode 100644
index 0000000..5140b90
--- /dev/null
+++ b/Firestore/Example/Tests/Integration/API/FIRTypeTests.mm
@@ -0,0 +1,75 @@
+/*
+ * 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 <FirebaseFirestore/FirebaseFirestore.h>
+
+#import <XCTest/XCTest.h>
+
+#import "Firestore/Example/Tests/Util/FSTIntegrationTestCase.h"
+
+@interface FIRTypeTests : FSTIntegrationTestCase
+@end
+
+@implementation FIRTypeTests
+
+- (void)assertSuccessfulRoundtrip:(NSDictionary *)data {
+  FIRDocumentReference *doc = [self.db documentWithPath:@"rooms/eros"];
+
+  [self writeDocumentRef:doc data:data];
+  FIRDocumentSnapshot *document = [self readDocumentForRef:doc];
+  XCTAssertTrue(document.exists);
+  XCTAssertEqualObjects(document.data, data);
+}
+
+- (void)testCanReadAndWriteNullFields {
+  [self assertSuccessfulRoundtrip:@{ @"a" : @1, @"b" : [NSNull null] }];
+}
+
+- (void)testCanReadAndWriteArrayFields {
+  [self assertSuccessfulRoundtrip:@{
+    @"array" : @[ @1, @"foo",
+                  @{ @"deep" : @YES }, [NSNull null] ]
+  }];
+}
+
+- (void)testCanReadAndWriteBlobFields {
+  NSData *data = [NSData dataWithBytes:"\0\1\2" length:3];
+  [self assertSuccessfulRoundtrip:@{@"blob" : data}];
+}
+
+- (void)testCanReadAndWriteGeoPointFields {
+  [self assertSuccessfulRoundtrip:@{
+    @"geoPoint" : [[FIRGeoPoint alloc] initWithLatitude:1.23 longitude:4.56]
+  }];
+}
+
+- (void)testCanReadAndWriteTimestampFields {
+  // Choose a value that can be converted losslessly between fixed point and double
+  NSDate *timestamp = [NSDate dateWithTimeIntervalSince1970:1491847082.125];
+  [self assertSuccessfulRoundtrip:@{@"timestamp" : timestamp}];
+}
+
+- (void)testCanReadAndWriteDocumentReferences {
+  FIRDocumentReference *docRef = [self documentRef];
+  [self assertSuccessfulRoundtrip:@{ @"a" : @42, @"ref" : docRef }];
+}
+
+- (void)testCanReadAndWriteDocumentReferencesInArrays {
+  FIRDocumentReference *docRef = [self documentRef];
+  [self assertSuccessfulRoundtrip:@{ @"a" : @42, @"refs" : @[ docRef ] }];
+}
+
+@end