JUnit – マップをテストする方法
Map`をテストするためにJUnit
assertEquals（）
を忘れ、
hamcrest-library.jar`のより表現力豊かな `IsMapContaining`クラスを使用します
pom.xml
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- This will get hamcrest-core automatically -->
<dependency>
<groupId>org.hamcrest</groupId>
<artifactId>hamcrest-library</artifactId>
<version>1.3</version>
<scope>test</scope>
</dependency>
</dependencies>
1. IsMapContainingの例
以下のすべての `assertThat`チェックがパスされます。
MapTest.java
package com.mkyong;
import org.hamcrest.collection.IsMapContaining;
import org.junit.Test;
import java.util.HashMap;
import java.util.Map;
import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.CoreMatchers.not;
import static org.hamcrest.MatcherAssert.assertThat;
public class MapTest {
@Test
public void testAssertMap() {
Map<String, String> map = new HashMap<>();
map.put("j", "java");
map.put("c", "c++");
map.put("p", "python");
map.put("n", "node");
Map<String, String> expected = new HashMap<>();
expected.put("n", "node");
expected.put("c", "c++");
expected.put("j", "java");
expected.put("p", "python");
//All passed/true
//1. Test equal, ignore order
assertThat(map, is(expected));
//2. Test size
assertThat(map.size(), is(4));
//3. Test map entry, best!
assertThat(map, IsMapContaining.hasEntry("n", "node"));
assertThat(map, not(IsMapContaining.hasEntry("r", "ruby")));
//4. Test map key
assertThat(map, IsMapContaining.hasKey("j"));
//5. Test map value
assertThat(map, IsMapContaining.hasValue("node"));
}
}
