Polishing

spring-core/src/test/java/org/springframework/util/LinkedMultiValueMapTests.java

@@ -40,11 +40,8 @@ public class LinkedMultiValueMapTests {
 	public void add() {
 		map.add("key", "value1");
 		map.add("key", "value2");
-		assertThat(map.size()).isEqualTo(1);
-		List<String> expected = new ArrayList<>(2);
-		expected.add("value1");
-		expected.add("value2");
-		assertThat(map.get("key")).isEqualTo(expected);
+		assertThat(map).hasSize(1);
+		assertThat(map.get("key")).containsExactly("value1", "value2");
 	}
 
 	@Test
@@ -64,27 +61,22 @@ public class LinkedMultiValueMapTests {
 	public void set() {
 		map.set("key", "value1");
 		map.set("key", "value2");
-		assertThat(map.size()).isEqualTo(1);
-		assertThat(map.get("key")).isEqualTo(Collections.singletonList("value2"));
+		assertThat(map.get("key")).containsExactly("value2");
 	}
 
 	@Test
 	public void addAll() {
 		map.add("key", "value1");
 		map.addAll("key", Arrays.asList("value2", "value3"));
-		assertThat(map.size()).isEqualTo(1);
-		List<String> expected = new ArrayList<>(2);
-		expected.add("value1");
-		expected.add("value2");
-		expected.add("value3");
-		assertThat(map.get("key")).isEqualTo(expected);
+		assertThat(map).hasSize(1);
+		assertThat(map.get("key")).containsExactly("value1","value2","value3");
 	}
 
 	@Test
 	public void addAllWithEmptyList() {
 		map.addAll("key", Collections.emptyList());
-		assertThat(map.size()).isEqualTo(1);
-		assertThat(map.get("key")).isEqualTo(Collections.emptyList());
+		assertThat(map).hasSize(1);
+		assertThat(map.get("key")).isEmpty();
 		assertThat(map.getFirst("key")).isNull();
 	}
 
@@ -111,17 +103,17 @@ public class LinkedMultiValueMapTests {
 		values.add("value1");
 		values.add("value2");
 		map.put("key", values);
-		Map<String, String> svm = map.toSingleValueMap();
-		assertThat(svm.size()).isEqualTo(1);
-		assertThat(svm.get("key")).isEqualTo("value1");
+		Map<String, String> singleValueMap = map.toSingleValueMap();
+		assertThat(singleValueMap).hasSize(1);
+		assertThat(singleValueMap.get("key")).isEqualTo("value1");
 	}
 
 	@Test
 	public void toSingleValueMapWithEmptyList() {
 		map.put("key", Collections.emptyList());
-		Map<String, String> svm = map.toSingleValueMap();
-		assertThat(svm.size()).isEqualTo(0);
-		assertThat(svm.get("key")).isNull();
+		Map<String, String> singleValueMap = map.toSingleValueMap();
+		assertThat(singleValueMap).isEmpty();
+		assertThat(singleValueMap.get("key")).isNull();
 	}
 
 	@Test