testing examples for hamcrest

guava/src/test/java/org/baeldung/guava/GuavaCollectionsExamplesTest.java

@@ -1,4 +1,4 @@
-package org.baeldung.guava.collections;
+package org.baeldung.guava;
 
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;

guava/src/test/java/org/baeldung/guava/GuavaOrderingExamplesTest.java

@@ -1,4 +1,4 @@
-package org.baeldung.guava.collections;
+package org.baeldung.guava;
 
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.nullValue;

guava/src/test/java/org/baeldung/hamcrest/HamcrestExamplesTest.java

@@ -0,0 +1,68 @@
+package org.baeldung.hamcrest;
+
+import static org.hamcrest.Matchers.contains;
+import static org.hamcrest.Matchers.empty;
+import static org.hamcrest.Matchers.emptyArray;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.hasItem;
+import static org.hamcrest.Matchers.hasItems;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertThat;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import org.junit.Test;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+
+public class HamcrestExamplesTest {
+
+    // tests
+
+    @Test
+    public final void whenVerifyingSingleElementIsPartOfCollection_thenCorrect() {
+        final List<String> collection = Lists.newArrayList("ab", "cd", "ef");
+        assertThat(collection, hasItem("cd"));
+        assertThat(collection, not(hasItem("zz")));
+    }
+
+    @Test
+    public final void whenVerifyingMultipleElementsArePartOfCollection_thenCorrect1() {
+        final List<String> collection = Lists.newArrayList("ab", "cd", "ef");
+        assertThat(collection, hasItems("cd", "ef"));
+    }
+
+    @Test
+    public final void whenVerifyingMultipleElementsArePartOfCollection_thenCorrect2() {
+        final List<String> collection = Lists.newArrayList("ab", "cd", "ef");
+        assertThat(collection, contains("ab", "cd", "ef"));
+    }
+
+    @Test
+    public final void givenCollectionIsEmpty_whenChecking_thenEmpty() {
+        final List<String> collection = Lists.newArrayList();
+        assertThat(collection, empty());
+    }
+
+    @Test
+    public final void givenCollectionIsNotEmpty_whenChecking_thenNotEmpty() {
+        final List<String> collection = Lists.newArrayList("a");
+        assertThat(collection, not(empty()));
+    }
+
+    @Test
+    public final void givenMapIsEmpty_whenChecking_thenEmpty() {
+        final Map<String, String> collection = Maps.newHashMap();
+        assertThat(collection, equalTo(Collections.EMPTY_MAP));
+    }
+
+    @Test
+    public final void givenArrayIsEmpty_whenChecking_thenEmpty() {
+        final String[] array = new String[] { "ab" };
+        assertThat(array, not(emptyArray()));
+    }
+
+}