fix test names

packages/local_auth/local_auth_ios/example/ios/RunnerTests/FLTLocalAuthPluginTests.m

@@ -146,7 +146,7 @@ - (void)testFailedAuthWithBiometrics {
   [self waitForExpectationsWithTimeout:kTimeout handler:nil];
 }
 
-- (void)testFailedWithErrorCode {
+- (void)testFailedWithKnownErrorCode {
   FLTLocalAuthPlugin *plugin = [[FLTLocalAuthPlugin alloc] init];
   id mockAuthContext = OCMClassMock([LAContext class]);
   plugin.authContextOverrides = @[ mockAuthContext ];
@@ -212,6 +212,7 @@ - (void)testHandleAuthReplyFailedWithSystemCancel {
   [plugin handleMethodCall:call
                     result:^(id _Nullable result) {
                         XCTAssertTrue([NSThread isMainThread]);
+                        XCTAssertTrue([result isKindOfClass:[NSNumber class]]);
                         XCTAssertFalse([result boolValue]);
                         [expectation fulfill];
                     }];