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diff --git a/Example/Core/Tests/FIRTestComponents.m b/Example/Core/Tests/FIRTestComponents.m
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+// Copyright 2018 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 "FIRTestComponents.h"
+
+#import <FirebaseCore/FIRComponent.h>
+
+#pragma mark - Standard Component
+
+@implementation FIRTestClass
+
+/// FIRTestProtocol conformance.
+- (void)doSomething {
+}
+
+/// FIRComponentRegistrant conformance.
++ (nonnull NSArray<FIRComponent *> *)componentsToRegister {
+  FIRComponent *testComponent =
+      [FIRComponent componentWithProtocol:@protocol(FIRTestProtocol)
+                            creationBlock:^id _Nullable(FIRComponentContainer *_Nonnull container,
+                                                        BOOL *_Nonnull isCacheable) {
+                              return [[FIRTestClass alloc] init];
+                            }];
+  return @[ testComponent ];
+}
+
+/// FIRComponentLifecycleMaintainer conformance.
+- (void)appWillBeDeleted:(FIRApp *)app {
+}
+
+@end
+
+/// A test class that is a component registrant, a duplicate of FIRTestClass.
+@implementation FIRTestClassDuplicate
+
+- (void)doSomething {
+}
+
+/// FIRComponentRegistrant conformance.
++ (nonnull NSArray<FIRComponent *> *)componentsToRegister {
+  FIRComponent *testComponent =
+      [FIRComponent componentWithProtocol:@protocol(FIRTestProtocol)
+                            creationBlock:^id _Nullable(FIRComponentContainer *_Nonnull container,
+                                                        BOOL *_Nonnull isCacheable) {
+                              return [[FIRTestClassDuplicate alloc] init];
+                            }];
+  return @[ testComponent ];
+}
+
+/// FIRComponentLifecycleMaintainer conformance.
+- (void)appWillBeDeleted:(FIRApp *)app {
+}
+
+@end
+
+#pragma mark - Eager Component
+
+@implementation FIRTestClassEagerCached
+
+/// FIRTestProtocolEager conformance.
+- (void)doSomethingFaster {
+}
+
+/// FIRComponentRegistrant conformance.
++ (nonnull NSArray<FIRComponent *> *)componentsToRegister {
+  FIRComponent *testComponent = [FIRComponent
+      componentWithProtocol:@protocol(FIRTestProtocolEagerCached)
+        instantiationTiming:FIRInstantiationTimingAlwaysEager
+               dependencies:@[]
+              creationBlock:^id _Nullable(FIRComponentContainer *_Nonnull container,
+                                          BOOL *_Nonnull isCacheable) {
+                FIRTestClassEagerCached *instance = [[FIRTestClassEagerCached alloc] init];
+                *isCacheable = YES;
+                [instance doSomethingFaster];
+                return instance;
+              }];
+  return @[ testComponent ];
+}
+
+/// FIRComponentLifecycleMaintainer conformance.
+- (void)appWillBeDeleted:(FIRApp *)app {
+}
+
+@end
+
+#pragma mark - Cached Component
+
+@implementation FIRTestClassCached
+
+/// FIRComponentRegistrant conformance.
++ (nonnull NSArray<FIRComponent *> *)componentsToRegister {
+  FIRComponent *testComponent = [FIRComponent
+      componentWithProtocol:@protocol(FIRTestProtocolCached)
+              creationBlock:^id _Nullable(FIRComponentContainer *_Nonnull container,
+                                          BOOL *_Nonnull isCacheable) {
+                FIRTestClassCached *instanceToCache = [[FIRTestClassCached alloc] init];
+                *isCacheable = YES;
+                return instanceToCache;
+              }];
+  return @[ testComponent ];
+}
+
+/// FIRComponentLifecycleMaintainer conformance.
+- (void)appWillBeDeleted:(FIRApp *)app {
+}
+
+@end