AssertJでリストの包除関係をテスト

一覧

リスト同士

結果が期待値…	assertThat(actual).xxx(expected)
と同じ（順不同）	containsOnlyElementsOf containsExactlyInAnyOrderElementsOf
を全て含む	containsAll
に全て含まれる	isSubsetOf
をひとつでも含む	containsAnyElementsOf
をひとつも含まない	doesNotContainAnyElementsOf

リストと要素

結果が期待値…	assertThat(actual).xxx(expected)
に含まれる	isIn
に含まれない	isNotIn
を（全て）含む	contains
を（ひとつも）含まない	doesNotContain

サンプルコード

全て最後のassertが失敗する。

src/test/java/ListTest.java

import org.junit.jupiter.api.Test;
import java.util.Arrays;
import static org.assertj.core.api.Assertions.assertThat;

public class ListTest {

	@Test
	void equalityTest() {
		assertThat(Arrays.asList(2, 3, 5)).containsOnlyElementsOf(Arrays.asList(3, 5, 2));
		assertThat(Arrays.asList(2, 3, 5)).containsOnlyElementsOf(Arrays.asList(2, 4, 6));
	}

	@Test
	void equalityTest2() {
		assertThat(Arrays.asList(2, 3, 5)).containsExactlyInAnyOrderElementsOf(Arrays.asList(3, 5, 2));
		assertThat(Arrays.asList(2, 3, 5)).containsExactlyInAnyOrderElementsOf(Arrays.asList(2, 4, 6));
	}

	@Test
	void supersetTest() {
		assertThat(Arrays.asList(2, 3, 5)).containsAll(Arrays.asList(3, 5));
		assertThat(Arrays.asList(2, 3, 5)).containsAll(Arrays.asList(3, 5, 2));
		assertThat(Arrays.asList(2, 3, 5)).containsAll(Arrays.asList(1, 2, 3, 4, 5, 6));
	}

	@Test
	void subsetTest() {
		assertThat(Arrays.asList(2, 3, 5)).isSubsetOf(Arrays.asList(1, 2, 3, 4, 5, 6));
		assertThat(Arrays.asList(2, 3, 5)).isSubsetOf(Arrays.asList(3, 5, 2));
		assertThat(Arrays.asList(2, 3, 5)).isSubsetOf(Arrays.asList(3, 5));
	}

	@Test
	void intersectionTest() {
		assertThat(Arrays.asList(2, 3, 5)).containsAnyElementsOf(Arrays.asList(2, 4, 6));
		assertThat(Arrays.asList(2, 3, 5)).containsAnyElementsOf(Arrays.asList(3, 5, 2));
		assertThat(Arrays.asList(2, 3, 5)).containsAnyElementsOf(Arrays.asList(1, 4, 6));
	}

	@Test
	void disjointTest() {
		assertThat(Arrays.asList(2, 3, 5)).doesNotContainAnyElementsOf(Arrays.asList(1, 4, 6));
		assertThat(Arrays.asList(2, 3, 5)).doesNotContainAnyElementsOf(Arrays.asList(2, 4, 6));
	}


	@Test
	void includedTest() {
		assertThat(3).isIn(Arrays.asList(2, 3, 5));
		assertThat(3).isIn(Arrays.asList(2, 4, 6));
	}

	@Test
	void excludedTest() {
		assertThat(3).isNotIn(Arrays.asList(2, 4, 6));
		assertThat(3).isNotIn(Arrays.asList(2, 3, 5));
	}


	@Test
	void includingTest() {
		assertThat(Arrays.asList(2, 3, 5)).contains(3);
		assertThat(Arrays.asList(2, 3, 5)).contains(1, 2, 4, 5, 6);
	}

	@Test
	void excludingTest() {
		assertThat(Arrays.asList(2, 3, 5)).doesNotContain(4);
		assertThat(Arrays.asList(2, 3, 5)).doesNotContain(2, 4, 6);
	}
}

バージョン

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.example</groupId>
	<artifactId>test</artifactId>
	<version>1.0-SNAPSHOT</version>

	<dependencies>
		<dependency>
			<groupId>org.junit.jupiter</groupId>
			<artifactId>junit-jupiter-api</artifactId>
			<version>5.3.1</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.junit.jupiter</groupId>
			<artifactId>junit-jupiter-engine</artifactId>
			<version>5.3.1</version>
			<scope>test</scope>
		</dependency>
		<dependency>
			<groupId>org.assertj</groupId>
			<artifactId>assertj-core</artifactId>
			<version>3.11.1</version>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<artifactId>maven-surefire-plugin</artifactId>
				<version>2.22.1</version>
			</plugin>
		</plugins>
	</build>
</project>