Invalid data provider return type

Reports methods marked with @DataProvider annotation that doesn't return Object[][] or Iterator<Object>. If another type is returned, TestNG throws an exception.

Example:

public class TestNgTest {
  @DataProvider(name = "Languages")
  List<String> getData() {
    return List.of("Java", "Kotlin");
  }

  @Test(dataProvider = "Languages")
  public void testData(String language) {
    System.out.println(language);
  }
}

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.

DataProviderReturnType

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 | Java | TestNG

Inspection Details
By default bundled with:	IntelliJ IDEA 2024.2, Qodana for JVM 2024.2,
Can be installed with plugin:	TestNG, 242.22892

Last modified: 11 September 2024