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   1 /**
   2  * Copyright (c) 2010-2023 Contributors to the openHAB project
   3  *
   4  * See the NOTICE file(s) distributed with this work for additional
   5  * information.
   6  *
   7  * This program and the accompanying materials are made available under the
   8  * terms of the Eclipse Public License 2.0 which is available at
   9  * http://www.eclipse.org/legal/epl-2.0
  10  *
  11  * SPDX-License-Identifier: EPL-2.0
  12  */
  13 package org.openhab.binding.mielecloud.internal.webservice.retry;
  14
  15 import static org.junit.jupiter.api.Assertions.*;
  16 import static org.mockito.ArgumentMatchers.*;
  17 import static org.mockito.Mockito.*;
  18
  19 import java.util.Objects;
  20 import java.util.function.Consumer;
  21 import java.util.function.Supplier;
  22
  23 import org.eclipse.jdt.annotation.NonNullByDefault;
  24 import org.eclipse.jdt.annotation.Nullable;
  25 import org.junit.jupiter.api.Test;
  26 import org.junit.jupiter.api.extension.ExtendWith;
  27 import org.mockito.Mock;
  28 import org.mockito.invocation.InvocationOnMock;
  29 import org.mockito.junit.jupiter.MockitoExtension;
  30 import org.mockito.stubbing.Answer;
  31 import org.openhab.binding.mielecloud.internal.util.MockUtil;
  32
  33 /**
  34  * @author Björn Lange - Initial contribution
  35  */
  36 @ExtendWith(MockitoExtension.class)
  37 @NonNullByDefault
  38 public class RetryStrategyCombinerTest {
  39     private static final String STRING_CONSTANT = "Some String";
  40
  41     private final RetryStrategy first = mock(RetryStrategy.class);
  42     private final RetryStrategy second = mock(RetryStrategy.class);
  43
  44     @Mock
  45     @Nullable
  46     private Supplier<@Nullable String> supplier;
  47     @Mock
  48     @Nullable
  49     private Consumer<Exception> consumer;
  50
  51     private Supplier<@Nullable String> getSupplier() {
  52         assertNotNull(supplier);
  53         return Objects.requireNonNull(supplier);
  54     }
  55
  56     private Consumer<Exception> getConsumer() {
  57         assertNotNull(consumer);
  58         return Objects.requireNonNull(consumer);
  59     }
  60
  61     @SuppressWarnings("unchecked")
  62     @Test
  63     public void testPerformRetryableOperationInvokesRetryStrategiesInCorrectOrder() {
  64         // given:
  65         when(first.<@Nullable String> performRetryableOperation(any(Supplier.class), any()))
  66                 .thenAnswer(new Answer<@Nullable String>() {
  67                     @Override
  68                     @Nullable
  69                     public String answer(@Nullable InvocationOnMock invocation) throws Throwable {
  70                         Supplier<String> inner = MockUtil.requireNonNull(invocation).getArgument(0);
  71                         return inner.get();
  72                     }
  73                 });
  74         when(second.<@Nullable String> performRetryableOperation(any(Supplier.class), any()))
  75                 .thenAnswer(new Answer<@Nullable String>() {
  76                     @Override
  77                     @Nullable
  78                     public String answer(@Nullable InvocationOnMock invocation) throws Throwable {
  79                         Supplier<String> inner = MockUtil.requireNonNull(invocation).getArgument(0);
  80                         return inner.get();
  81                     }
  82                 });
  83         when(getSupplier().get()).thenReturn(STRING_CONSTANT);
  84
  85         RetryStrategyCombiner combiner = new RetryStrategyCombiner(first, second);
  86
  87         // when:
  88         String result = combiner.performRetryableOperation(getSupplier(), getConsumer());
  89
  90         // then:
  91         assertEquals(STRING_CONSTANT, result);
  92         verify(first).performRetryableOperation(any(Supplier.class), eq(getConsumer()));
  93         verify(second).performRetryableOperation(any(Supplier.class), eq(getConsumer()));
  94         verify(getSupplier()).get();
  95         verifyNoMoreInteractions(first, second, getSupplier());
  96         verifyNoInteractions(getConsumer());
  97     }
  98 }