list - AssertJ:containsOnly和containsExactlyInAnyOrder有什么区别

Question

AbstractIterableAssert#containsOnly说:

Verifies that the actual group contains only the given values and nothing else, in any order.

AbstractIterableAssert#containsExactlyInAnyOrder说:

Verifies that the actual group contains exactly the given values and nothing else, in any order.

该描述看起来几乎相同，所以仅和之间的实际区别是什么？

Answer 1

仅当预期和实际的集合/列表包含重复的时，实际的差异才有意义:

containsOnly始终与敏感区重复:如果期望/实际值集与

相匹配，它永远不会失败

containsExactlyInAnyOrder始终重复敏感:如果期望/实际元素的数量不同

则失败

虽然，如果发生以下情况，它们都会失败:

实际集合

中至少缺少一个预期的唯一值

并非断言实际集合中的每个唯一值

参见示例:

private List<String> withDuplicates;
private List<String> noDuplicates;

@Before
public void setUp() throws Exception {
    withDuplicates = asList("Entryway", "Underhalls", "The Gauntlet", "Underhalls", "Entryway");
    noDuplicates = asList("Entryway", "Underhalls", "The Gauntlet");
}

@Test
public void exactMatches_SUCCESS() throws Exception {
    // successes because these 4 cases are exact matches (bored cases)
    assertThat(withDuplicates).containsOnly("Entryway", "The Gauntlet", "Underhalls", "Entryway", "Underhalls"); // 1
    assertThat(withDuplicates).containsExactlyInAnyOrder("Entryway", "The Gauntlet", "Underhalls", "Entryway", "Underhalls"); // 2

    assertThat(noDuplicates).containsOnly("Entryway", "The Gauntlet", "Underhalls"); // 3
    assertThat(noDuplicates).containsExactlyInAnyOrder("Entryway", "The Gauntlet", "Underhalls"); // 4
}

@Test
public void duplicatesAreIgnored_SUCCESS() throws Exception {
    // successes because actual withDuplicates contains only 3 UNIQUE values
    assertThat(withDuplicates).containsOnly("Entryway", "The Gauntlet", "Underhalls"); // 5

    // successes because actual noDuplicates contains ANY of 5 expected values
    assertThat(noDuplicates).containsOnly("Entryway", "The Gauntlet", "Underhalls", "Entryway", "Underhalls"); // 6
}

@Test
public void duplicatesCauseFailure_FAIL() throws Exception {
    SoftAssertions.assertSoftly(softly -> {
        // fails because ["Underhalls", "Entryway"] are UNEXPECTED in actual withDuplicates collection
        softly.assertThat(withDuplicates).containsExactlyInAnyOrder("Entryway", "The Gauntlet", "Underhalls"); // 7

        // fails because ["Entryway", "Underhalls"] are MISSING in actual noDuplicates collection
        softly.assertThat(noDuplicates).containsExactlyInAnyOrder("Entryway", "The Gauntlet", "Underhalls", "Entryway", "Underhalls"); // 8
    });
}