Convert FIRCoreDiagnostics to canonical nanopb, and move to OSS.

Example/Core/Tests/FIRAppTest.m

@@ -16,6 +16,7 @@
 #import "FIRTestComponents.h"
 
 #import <FirebaseCoreDiagnosticsInterop/FIRCoreDiagnosticsData.h>
+#import <FirebaseCoreDiagnosticsInterop/FIRCoreDiagnosticsInterop.h>
 
 #import <FirebaseCore/FIRAnalyticsConfiguration.h>
 #import <FirebaseCore/FIRAppInternal.h>

Example/CoreDiagnostics/AppHost/FIRCoreExternSymbols.m

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2019 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 <Foundation/Foundation.h>
+
+// This file is only used to help compile FirebaseCoreDiagnostics for testing. */
+
+/** For testing use only. This symbol should be provided by */
+Class FIRCoreDiagnosticsImplementation;

Example/CoreDiagnostics/AppHost/main.m

@@ -0,0 +1,3 @@
+@import Foundation;
+int main() {
+}

Example/CoreDiagnostics/Tests/FIRCoreDiagnosticsDateFileStorageTests.m

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2019 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 <XCTest/XCTest.h>
+#import "FIRCDLibrary/FIRCoreDiagnosticsDateFileStorage.h"
+
+@interface FIRCoreDiagnosticsDateFileStorageTests : XCTestCase
+@property(nonatomic) NSURL *fileURL;
+@property(nonatomic) FIRCoreDiagnosticsDateFileStorage *storage;
+@end
+
+@implementation FIRCoreDiagnosticsDateFileStorageTests
+
+- (void)setUp {
+  NSString *documentsPath = [NSSearchPathForDirectoriesInDomains(
+      NSApplicationSupportDirectory, NSUserDomainMask, YES) firstObject];
+  XCTAssertNotNil(documentsPath);
+  NSURL *documentsURL = [NSURL fileURLWithPath:documentsPath];
+  self.fileURL = [documentsURL URLByAppendingPathComponent:@"FIRDiagnosticsDateFileStorageTests"
+                                               isDirectory:NO];
+
+  NSError *error;
+  if (![documentsURL checkResourceIsReachableAndReturnError:&error]) {
+    XCTAssert([[NSFileManager defaultManager] createDirectoryAtURL:documentsURL
+                                       withIntermediateDirectories:YES
+                                                        attributes:nil
+                                                             error:&error],
+              @"Error: %@", error);
+  }
+
+  self.storage = [[FIRCoreDiagnosticsDateFileStorage alloc] initWithFileURL:self.fileURL];
+}
+
+- (void)tearDown {
+  [[NSFileManager defaultManager] removeItemAtURL:self.fileURL error:nil];
+  self.fileURL = nil;
+  self.storage = nil;
+}
+
+- (void)testDateStorage {
+  NSDate *dateToSave = [NSDate date];
+
+  XCTAssertNil([self.storage date]);
+
+  NSError *error;
+  XCTAssertTrue([self.storage setDate:dateToSave error:&error]);
+
+  XCTAssertEqualObjects([self.storage date], dateToSave);
+
+  XCTAssertTrue([self.storage setDate:nil error:&error]);
+  XCTAssertNil([self.storage date]);
+}
+
+- (void)testDateIsStoredToFileSystem {
+  NSDate *date = [NSDate date];
+
+  NSError *error;
+  XCTAssert([self.storage setDate:date error:&error], @"Error: %@", error);
+
+  FIRCoreDiagnosticsDateFileStorage *anotherStorage =
+      [[FIRCoreDiagnosticsDateFileStorage alloc] initWithFileURL:self.fileURL];
+
+  XCTAssertEqualObjects([anotherStorage date], date);
+}
+
+@end