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A set of AssertJ assertion helpers geared toward testing Android.
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package org.assertj.android.api.util;

import android.annotation.TargetApi;
import android.util.LruCache;
import org.assertj.core.api.AbstractAssert;

import static android.os.Build.VERSION_CODES.HONEYCOMB_MR1;
import static org.assertj.core.api.Assertions.assertThat;

/** Assertions for {@link LruCache} instances. */
@TargetApi(HONEYCOMB_MR1)
public class LruCacheAssert extends AbstractAssert, LruCache> {
  public LruCacheAssert(LruCache actual) {
    super(actual, LruCacheAssert.class);
  }

  public LruCacheAssert hasEntry(K key) {
    isNotNull();
    assertThat(actual.snapshot()) //
        .overridingErrorMessage("Expected to contain entry with key <%s> but did not.") //
        .containsKey(key);
    return this;
  }

  public LruCacheAssert hasCreateCount(int count) {
    isNotNull();
    int actualCount = actual.createCount();
    assertThat(actualCount) //
        .overridingErrorMessage("Expected create count <%s> but was <%s>.", count, actualCount) //
        .isEqualTo(count);
    return this;
  }

  public LruCacheAssert hasEvictionCount(int count) {
    isNotNull();
    int actualCount = actual.evictionCount();
    assertThat(actualCount) //
        .overridingErrorMessage("Expected eviction count <%s> but was <%s>.", count, actualCount) //
        .isEqualTo(count);
    return this;
  }

  public LruCacheAssert hasHitCount(int count) {
    isNotNull();
    int actualCount = actual.hitCount();
    assertThat(actualCount) //
        .overridingErrorMessage("Expected hit count <%s> but was <%s>.", count, actualCount) //
        .isEqualTo(count);
    return this;
  }

  public LruCacheAssert hasMaxSize(int size) {
    isNotNull();
    int actualSize = actual.maxSize();
    assertThat(actualSize) //
        .overridingErrorMessage("Expected max size <%s> but was <%s>.", size, actualSize) //
        .isEqualTo(size);
    return this;
  }

  public LruCacheAssert hasMissCount(int count) {
    isNotNull();
    int actualCount = actual.missCount();
    assertThat(actualCount) //
        .overridingErrorMessage("Expected miss count <%s> but was <%s>.", count, actualCount) //
        .isEqualTo(count);
    return this;
  }

  public LruCacheAssert hasPutCount(int count) {
    isNotNull();
    int actualCount = actual.putCount();
    assertThat(actualCount) //
        .overridingErrorMessage("Expected put count <%s> but was <%s>.", count, actualCount) //
        .isEqualTo(count);
    return this;
  }

  public LruCacheAssert hasSize(int size) {
    isNotNull();
    int actualSize = actual.size();
    assertThat(actualSize) //
        .overridingErrorMessage("Expected size <%s> but was <%s>.", size, actualSize) //
        .isEqualTo(size);
    return this;
  }
}