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  3. 'assertEquals()' called on array

'assertEquals()' called on array

Last modified: 03 December 2024

Reports JUnit assertEquals() calls with arguments of an array type. Such methods compare the arrays' identities instead of the arrays' contents. Array contents should be checked with the assertArrayEquals() method.

Example:

@Test
public void testSort() {
  int[] actual = {248, 496, 0, 56};
  Arrays.sort(actual);
  Assert.assertEquals(new int[] {0, 56, 248, 496}, actual);
}

After the quick-fix is applied:

@Test
public void testSort() {
  int[] actual = {248, 496, 0, 56};
  Arrays.sort(actual);
  Assert.assertArrayEquals(new int[] {0, 56, 248, 496}, actual);
}

Locating this inspection

By ID

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AssertEqualsCalledOnArray
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Settings or Preferences | Editor | Inspections | JUnit

Inspection Details

By default bundled with:

IntelliJ IDEA 2024.3, Qodana for JVM 2024.3,

Can be installed with plugin:

JUnit, 243.23126