if err := DB.Create(&users).Error; err != nil {
		t.Fatalf("errors happened when create users: %v", err)
	}

	t.Run("First", func(t *testing.T) {
		var first User
		if err := DB.Where("name = ?", "find").First(&first).Error; err != nil {
			t.Errorf("errors happened when query first: %v", err)
		} else {
			CheckUser(t, first, users[0])
		}
	})

	t.Run("Last", func(t *testing.T) {
		var last User

        assertTrue(it.hasNext());
        FileEntry e2 = it.next();

        // Assert
        assertNotNull(e1);
        assertNotNull(e2);
        assertEquals("first", e1.getName());
        assertEquals(acceptedName, e2.getName(), "Should return the first name accepted by filter");

        // Verify filter interactions: not called for '.' and '..', called for others
        verify(nameFilter, never()).accept(parent, ".");

		t.Error("There should be one record be affected when create record")
	}

	var cc1 CustomizeColumn
	DB.First(&cc1, "mapped_name = ?", "foo")

	if cc1.Name != expected {
		t.Errorf("Failed to query CustomizeColumn")
	}

	cc.Name = "bar"
	DB.Save(&cc)

	var cc2 CustomizeColumn
	DB.First(&cc2, "mapped_id = ?", 666)
	if cc2.Name != "bar" {
		t.Errorf("Failed to query CustomizeColumn")
	}
}

   * as equal, the first is returned.
   *
   * <p>The recommended solution for finding the {@code maximum} of some values depends on the type
   * of your data and the number of elements you have. Read more in the Guava User Guide article on
   * <a href="https://github.com/google/guava/wiki/CollectionUtilitiesExplained#comparators">{@code
   * Comparators}</a>.
   *

        // Verify little-endian encoding
        assertEquals((byte) 0xA1, encoded[0], "First byte of first character");
        assertEquals((byte) 0x00, encoded[1], "Second byte of first character");
        assertEquals((byte) 0xA2, encoded[2], "First byte of second character");
        assertEquals((byte) 0x00, encoded[3], "Second byte of second character");
    }

    @Test

  @ParametricNullness
  protected abstract E get(int index);

  /**
   * Constructs an iterator across a sequence of the given size whose initial position is 0. That
   * is, the first call to {@link #next()} will return the first element (or throw {@link
   * NoSuchElementException} if {@code size} is zero).
   *
   * @throws IllegalArgumentException if {@code size} is negative
   */

        // List with first element NOT being Entity
        List<Object> mixedList = new ArrayList<>();
        mixedList.add("string first");
        mixedList.add(entity);

        RenderDataUtil.register(data, "mixed", mixedList);

        Object result = data.getDataMap().get("mixed");
        assertEquals(mixedList, result); // Should be registered as-is since first element is not Entity
    }

     1. Build a Gradle distribution with a fixed timestamp and hash it, but never use this distribution.
     2. Build a Gradle distribution with this hash as a version + fixed timestamp -> dogfood-first
     3. Build a Gradle distribution using dogfood-first with this hash as a version + fixed timestamp different from the one above -> dogfood-second
     4. Use dogfood-second to run a Gradle build which runs tests.

     */

	}

	if yasuo.ID == "" {
		t.Fatal("should be able to has ID, but got zero value")
	}

	var result Yasuo
	if err := DB.First(&result, "id = ?", yasuo.ID).Error; err != nil || yasuo.Name != "jinzhu" {
		t.Errorf("No error should happen, but got %v", err)
	}

	if err := DB.Where("id = $1", yasuo.ID).First(&Yasuo{}).Error; err != nil || yasuo.Name != "jinzhu" {
		t.Errorf("No error should happen, but got %v", err)
	}

	if err := DB.Where("roles2 IS NULL AND roles3 = ?", "").First(&result, data.ID).Error; err != nil {
		t.Fatalf("failed to query data, got error %v", err)
	}

	AssertEqual(t, result, data)

	if err := DB.Model(&result).Update("roles", "").Error; err != nil {
		t.Fatalf("failed to update data's roles, got error %v", err)
	}

	if err := DB.First(&result, data.ID).Error; err != nil {