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>