assertEquals(Integer.valueOf(1), map.replace("foo", 2));
    assertNull(map.replace("bar", 3));
    assertEquals(Integer.valueOf(2), map.get("foo"));
    assertFalse(map.containsKey("bar"));
  }

  public void testReplaceConditional() {
    TestMap map = new TestMap();
    map.put("foo", 1);
    assertFalse(map.replace("foo", 2, 3));
    assertFalse(map.replace("bar", 1, 2));

  // TF eager runtime.
  // TODO(b/172877902): These helper functions are currently used to support
  // PyFuncOp on TFRT, and might be useful for ops that directly use low
  // level TF APIs. Remove/replace the following functions when TFRT native
  // ops are implemented.
  //===--------------------------------------------------------------------===//
  // Create an abstract tensor handle from tensorflow::Tensor.

	}

	if DB.Model(&hamster2).Association("OtherToy").Count() != 1 {
		t.Errorf("Hamster's toys count should be 1 after Append")
	}

	// Replace
	DB.Model(&hamster).Association("PreferredToy").Replace(&Toy{
		Name: "bike 3",
	})

	DB.Model(&hamster).Association("OtherToy").Replace(&Toy{
		Name: "treadmill 3",
	})

	hamsterToy = Toy{}
	DB.Model(&hamster).Association("PreferredToy").Find(&hamsterToy)

	AssertAssociationCount(t, user2, "Manager", 1, "AfterAppend")

	// Replace
	company2 := Company{Name: "company-belongs-to-replace"}
	manager2 := GetUser("manager-belongs-to-replace", Config{})

	if err := DB.Model(&user2).Association("Company").Replace(&company2); err != nil {
		t.Fatalf("Error happened when replace Company, got %v", err)
	}

	if company2.ID == 0 {
		t.Fatalf("Company's ID should be created")

                childrenTracking.replace(delegate, newDelegate);
            }
            delegate = newDelegate;
        }
    }

    protected boolean replace(Object oldDelegate, Object newDelegate) {
        return false;
    }

    @FunctionalInterface
    protected interface ChildrenTracking {
        boolean replace(Object oldDelegate, Object newDelegate);
    }

        return stripInvalidXMLCharacters(//
                value//
                        .replace("&", "&") //
                        .replace("<", "&lt;")//
                        .replace(">", "&gt;")//
                        .replace("\"", "&quot;")//
                        .replace("\'", "&apos;")//
        );
    }

    public static String stripInvalidXMLCharacters(final String in) {

    val mainFiles = mainFiles()
    return mainFiles.map {
      val suffix = it.path.replace("${prefix}samples/guide/src/main/java/", "")
      suffix.replace("(.*)\\.java".toRegex()) { mr ->
        mr.groupValues[1].replace('/', '.')
      }.replace("(.*)\\.kt".toRegex()) { mr ->
        mr.groupValues[1].replace('/', '.') + "Kt"
      }
    }.sorted()
  }
}

@Disabled("Don't run by default")
@Tag("Slow")

	}

	user.Account = account
	CheckUser(t, user2, user)

	AssertAssociationCount(t, user, "Account", 1, "AfterAppend")

	// Replace
	account2 := Account{Number: "account-has-one-replace"}

	if err := DB.Model(&user2).Association("Account").Replace(&account2); err != nil {
		t.Fatalf("Error happened when append Account, got %v", err)
	}

	if account2.ID == 0 {
		t.Fatalf("account2's ID should be created")

    }
  }

  @Test
  fun singlePart() {
    val expected =
      """
      |--123
      |
      |Hello, World!
      |--123--
      |
      """.trimMargin().replace("\n", "\r\n")
    val body =
      MultipartBody.Builder("123")
        .addPart("Hello, World!".toRequestBody(null))
        .build()
    assertThat(body.boundary).isEqualTo("123")

                childrenTracking.replace(delegate, newDelegate);
            }
            delegate = newDelegate;
        }
    }

    protected boolean replace(Object oldDelegate, Object newDelegate) {
        return false;
    }

    @FunctionalInterface
    protected interface ChildrenTracking {
        boolean replace(Object oldDelegate, Object newDelegate);
    }