DB.Model(&users).Association("Manager").Append(
		GetUser("manager-slice-belongs-to-1", Config{}),
		GetUser("manager-slice-belongs-to-2", Config{}),
		GetUser("manager-slice-belongs-to-3", Config{}),
	)
	AssertAssociationCount(t, users, "Manager", 3, "After Append")

	if err := DB.Model(&users).Association("Manager").Append(
		GetUser("manager-slice-belongs-to-test-1", Config{}),
	).Error; err == nil {

        assertThat(FieldUtil.getString(field), is(STRING_DATA));
    }

    /**
     * @throws Exception
     */
    @Test(expected = ClIllegalArgumentException.class)
    public void testSet() throws Exception {
        final Field field = getClass().getField("intField");
        FieldUtil.set(field, this, "abc");
    }

    /**
     * @throws Exception
     */
    @Test

import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.ArrayList;
import java.util.List;
import org.jspecify.annotations.NullMarked;
import org.jspecify.annotations.Nullable;

/**
 * Tester for equals() and hashCode() methods of a class.
 *
 * <p>The simplest use case is:
 *
 * <pre>
 * new EqualsTester().addEqualityGroup(foo).testEquals();
 * </pre>
 *

# Tester les WebSockets { #testing-websockets }

Vous pouvez utiliser le même `TestClient` pour tester les WebSockets.

Pour cela, vous utilisez `TestClient` dans une instruction `with`, en vous connectant au WebSocket :

{* ../../docs_src/app_testing/tutorial002_py310.py hl[27:31] *}

/// note | Remarque

  @J2ktIncompatible
  public void testStringConverter_nullPointerTester() throws Exception {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicInstanceMethods(converter);
  }

  public void testStringConverter_nullConversions() {
    Converter<String, TestEnum> converter = Enums.stringConverter(TestEnum.class);

  public void testNullEqualityGroup() {
    EqualsTester tester = new EqualsTester();
    assertThrows(NullPointerException.class, () -> tester.addEqualityGroup((Object[]) null));
  }

  public void testNullObjectInEqualityGroup() {
    EqualsTester tester = new EqualsTester();
    NullPointerException e =
        assertThrows(NullPointerException.class, () -> tester.addEqualityGroup(1, null, 3));

    private final EqualsTester tester = new EqualsTester();

    @CanIgnoreReturnValue
    TypeVariableEqualsTester addEqualityGroup(Type jvmType, Type... types) {
      if (Types.NativeTypeVariableEquals.NATIVE_TYPE_VARIABLE_ONLY) {
        tester.addEqualityGroup(jvmType);
        tester.addEqualityGroup((Object[]) types);
      } else {
        tester.addEqualityGroup(Lists.asList(jvmType, types).toArray());

@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class ListSetTester<E> extends AbstractListTester<E> {
  @ListFeature.Require(SUPPORTS_SET)
  @CollectionSize.Require(absent = ZERO)
  public void testSet() {
    doTestSet(e3());
  }

  @CollectionSize.Require(absent = ZERO)
  @CollectionFeature.Require(ALLOWS_NULL_VALUES)
  @ListFeature.Require(SUPPORTS_SET)
  public void testSet_null() {
    doTestSet(null);

                if (ntResponse == null) {
                    ntResponse = new byte[0];
                }
                return new NtlmPasswordAuthentication(type3.getDomain(), type3.getUser(), challenge, lmResponse, ntResponse);
            }
        } else {
            resp.setHeader("WWW-Authenticate", "NTLM");
        }
        resp.setStatus(HttpServletResponse.SC_UNAUTHORIZED);

			t.Fatalf("invalid %v count %v, expects: %v got %v", name, reason, result, count)
		}
	}
}

func TestInvalidAssociation(t *testing.T) {
	user := *GetUser("invalid", Config{Company: true, Manager: true})
	if err := DB.Model(&user).Association("Invalid").Find(&user.Company).Error; err == nil {
		t.Fatalf("should return errors for invalid association, but got nil")
	}
}