"immediateFuture to test classes" Code Answer's
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immediateFuture to test classes
@Test
public void completeExceptionallyOnCallbackFailure() {
ListenableFuture<UserRecordResult> failureResponse = Futures.immediateFailedFuture(new RuntimeException());
CompletableFuture future = new CompletableFuture();
handleResponse(failureResponse, future);
assertThat(future.isCompletedExceptionally(), equalTo(true));
}
@Test
public void completeExceptionallyIfUserRecordResultIsNotSuccessful() {
UserRecordResult mockResult = Mockito.mock(UserRecordResult.class);
Mockito.when(mockResult.isSuccessful()).thenReturn(false);
ListenableFuture<UserRecordResult> failureResponse = Futures.immediateFuture(mockResult);
CompletableFuture future = new CompletableFuture();
handleResponse(failureResponse, future);
assertThat(future.isCompletedExceptionally(), equalTo(true));
}
@Test
public void completeSuccessfully() throws ExecutionException, InterruptedException {
UserRecordResult mockResult = Mockito.mock(UserRecordResult.class);
Mockito.when(mockResult.isSuccessful()).thenReturn(true);
ListenableFuture<UserRecordResult> successResponse = Futures.immediateFuture(mockResult);
CompletableFuture future = new CompletableFuture();
handleResponse(successResponse, future);
assertThat(future.get(), equalTo(true));
}
Source: stackoverflow.com
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