Disable gRPC death tests (#2643)

* Remove default app that writes to Firestore.

This ends up running during unit test execution and that doesn't work on
Travis.

* Remove gRPC death tests

These are expensive because they actually are catching abort().

Author: wilhuff

Firestore/Example/App/macOS/AppDelegate.m

@@ -26,29 +26,6 @@ @interface AppDelegate ()
 @implementation AppDelegate
 
 - (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
-  // create a firestore db
-  NSString *filePath = [[NSBundle mainBundle] pathForResource:@"GoogleService-Info"
-                                                       ofType:@"plist"];
-  FIROptions *options = [[FIROptions alloc] initWithContentsOfFile:filePath];
-  [FIRApp configureWithOptions:options];
-  FIRFirestore *db = [FIRFirestore firestore];
-
-  // do the timestamp fix
-  FIRFirestoreSettings *settings = db.settings;
-  db.settings = settings;
-
-  // create a doc
-  FIRDocumentReference *docRef = [[db collectionWithPath:@"junk"] documentWithPath:@"test_doc"];
-  NSDictionary *data = @{@"msg" : @"hello"};
-
-  [docRef setData:data
-       completion:^(NSError *_Nullable error) {
-         if (error != nil) {
-           NSLog(@"created error: %@", error);
-         } else {
-           NSLog(@"Yay!");
-         }
-       }];
 }
 
 - (void)applicationWillTerminate:(NSNotification *)aNotification {

Firestore/core/test/firebase/firestore/remote/grpc_stream_test.cc

@@ -196,18 +196,6 @@ TEST_F(GrpcStreamTest, CanGetResponseHeadersAfterFinishing) {
   });
 }
 
-// Death tests should contain the word "DeathTest" in their name -- see
-// https://github.com/google/googletest/blob/master/googletest/docs/advanced.md#death-test-naming
-using GrpcStreamDeathTest = GrpcStreamTest;
-
-TEST_F(GrpcStreamDeathTest, CannotRestart) {
-  worker_queue.EnqueueBlocking([&] { stream->Start(); });
-  KeepPollingGrpcQueue();
-  worker_queue.EnqueueBlocking([&] { stream->FinishImmediately(); });
-  worker_queue.EnqueueBlocking(
-      [&] { EXPECT_DEATH_IF_SUPPORTED(stream->Start(), ""); });
-}
-
 // Read and write
 
 TEST_F(GrpcStreamTest, ReadIsAutomaticallyReadded) {

Firestore/core/test/firebase/firestore/remote/grpc_streaming_reader_test.cc

@@ -136,10 +136,6 @@ TEST_F(GrpcStreamingReaderTest, CanGetResponseHeadersAfterFinishing) {
 
 // Method prerequisites -- incorrect usage
 
-// Death tests should contain the word "DeathTest" in their name -- see
-// https://github.com/google/googletest/blob/master/googletest/docs/advanced.md#death-test-naming
-using GrpcStreamingReaderDeathTest = GrpcStreamingReaderTest;
-
 TEST_F(GrpcStreamingReaderTest, CannotFinishAndNotifyBeforeStarting) {
   // No callback has been assigned.
   worker_queue.EnqueueBlocking(

Firestore/core/test/firebase/firestore/remote/grpc_unary_call_test.cc

@@ -119,23 +119,6 @@ TEST_F(GrpcUnaryCallTest, CanGetResponseHeadersAfterFinishing) {
   });
 }
 
-// Method prerequisites -- incorrect usage
-
-// Death tests should contain the word "DeathTest" in their name -- see
-// https://github.com/google/googletest/blob/master/googletest/docs/advanced.md#death-test-naming
-using GrpcUnaryCallDeathTest = GrpcUnaryCallTest;
-
-TEST_F(GrpcUnaryCallDeathTest, CannotStartTwice) {
-  StartCall();
-  EXPECT_DEATH_IF_SUPPORTED(StartCall(), "");
-}
-
-TEST_F(GrpcUnaryCallDeathTest, CannotRestart) {
-  StartCall();
-  ForceFinish({{Type::Finish, CompletionResult::Ok}});
-  EXPECT_DEATH_IF_SUPPORTED(StartCall(), "");
-}
-
 TEST_F(GrpcUnaryCallTest, CannotFinishAndNotifyBeforeStarting) {
   // No callback has been assigned.
   worker_queue.EnqueueBlocking(