Class BaseBuilderTest

core/src/test/java/feign/BaseBuilderTest.java:27–65

import org.mockito.Mockito;

class BaseBuilderTest {

  @Test
  void checkEnrichTouchesAllAsyncBuilderFields()
      throws IllegalArgumentException, IllegalAccessException {
    test(
        AsyncFeign.builder().requestInterceptor(_ -> {}).responseInterceptor((ic, c) -> c.next(ic)),
        12);
  }

  private void test(BaseBuilder<?, ?> builder, int expectedFieldsCount)
      throws IllegalArgumentException, IllegalAccessException {
    Capability mockingCapability = Mockito.mock(Capability.class, RETURNS_MOCKS);
    BaseBuilder<?, ?> enriched = builder.addCapability(mockingCapability).enrich();

    List<Field> fields = enriched.getFieldsToEnrich();
    assertThat(fields).hasSize(expectedFieldsCount);

    for (Field field : fields) {
      field.setAccessible(true);
      Object mockedValue = field.get(enriched);
      if (mockedValue instanceof List<?> list) {
        assertThat(list).withFailMessage("Enriched list missing contents %s", field).isNotEmpty();
        mockedValue = list.getFirst();
      }
      assertThat(Mockito.mockingDetails(mockedValue).isMock())
          .as("Field was not enriched " + field)
          .isTrue();
      assertNotSame(builder, enriched);
    }
  }

  @Test
  void checkEnrichTouchesAllBuilderFields()
      throws IllegalArgumentException, IllegalAccessException {
    test(
        Feign.builder().requestInterceptor(_ -> {}).responseInterceptor((ic, c) -> c.next(ic)), 10);
  }
}