'assertEquals()' may be 'assertSame()'

Reports JUnit assertEquals() calls that can be replaced with an equivalent assertSame() call. This is possible when the arguments are instances of a final class that does not override the Object.equals() method and makes it explicit that the object identity is compared.

Suggests replacing assertEquals() with assertSame().

Example:

  @Test
  public void testObjectType() {
    Object o = getObject();
    Assert.assertEquals(String.class, o.getClass());
  }

After the quick fix is applied:

  @Test
  public void testSort() {
    Object o = getObject();
    Assert.assertSame(String.class, o.getClass());
  }

Locating this inspection

By ID

Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.

AssertEqualsMayBeAssertSame

Via Settings dialog

Path to the inspection settings via IntelliJ Platform IDE Settings dialog, when you need to adjust inspection settings directly from your IDE.

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, 243.26483

01 April 2025