assertEquals(true, builder.initialSettings.get("key3"));

        // Test overwriting existing setting
        builder.addInitialSettings("key1", "newValue1");
        assertEquals(3, builder.initialSettings.size());
        assertEquals("newValue1", builder.initialSettings.get("key1"));
    }

    @Test
    public void testAddInitialSettingsWithNullValue() {
        // Test adding null value

        }
    }

    /**
     * Merges a frequency value from existing source with new value.
     */
    private static long mergeFrequency(final Map<String, Object> existingSource, final String fieldName, final long newValue) {
        final Object freqObj = existingSource.get(fieldName);
        if (freqObj == null) {
            return newValue;
        }

        assertEquals("value1", dataMap.get("key1"));

        // Add an array - should merge with existing value
        String[] newValues = new String[] { "value2", "value3" };
        transformer.putResultDataBody(dataMap, "key1", newValues);

        Object result = dataMap.get("key1");
        assertTrue(result instanceof Object[]);
        Object[] resultArray = (Object[]) result;

    String key = "key";
    long newValue = random.nextInt(MAX_ADDEND);
    for (int i = 0; i < ITERATIONS; i++) {
      long before = map.get(key);
      long result = map.put(key, newValue);
      long after = map.get(key);
      assertEquals(newValue, after);
      assertEquals(before, result);
      newValue += newValue;
    }
    assertEquals(1, map.size());

			t.Errorf("no error should happen when assign value to field %v, but got %v", k, err)
		}
	}
	newValues["updated_at"] = time.Time{}
	newValues["active"] = false
	checkField(t, userSchema, reflectValue, newValues)

	// test valuer and other type
	age := myint(10)
	var nilTime *time.Time
	newValues2 := map[string]interface{}{
		"name":       sql.NullString{String: "valuer_and_setter_3", Valid: true},

            return delta;
          }
          // atomic replaced
          continue outer;
        }

        long newValue = oldValue + delta;
        if (atomic.compareAndSet(oldValue, newValue)) {
          return newValue;
        }
        // value changed
      }
    }
  }

  /**

    String key = "key";
    long newValue = random.nextInt(MAX_ADDEND);
    for (int i = 0; i < ITERATIONS; i++) {
      long before = map.get(key);
      long result = map.put(key, newValue);
      long after = map.get(key);
      assertEquals(newValue, after);
      assertEquals(before, result);
      newValue += newValue;
    }
    assertEquals(1, map.size());

    // different value
    assertFalse(segment.replace(key, hash, oldValue, newValue));
    assertEquals(1, segment.count);
    assertThat(segment.get(key, hash)).isEqualTo(newValue);

    // cleared
    segment.setWeakValueReferenceForTesting(entry, oldValueRef);
    oldValueRef.clear();
    assertFalse(segment.replace(key, hash, oldValue, newValue));
    assertEquals(0, segment.count);

    // different value
    assertFalse(segment.replace(key, hash, oldValue, newValue));
    assertEquals(1, segment.count);
    assertThat(segment.get(key, hash)).isEqualTo(newValue);

    // cleared
    segment.setWeakValueReferenceForTesting(entry, oldValueRef);
    oldValueRef.clear();
    assertFalse(segment.replace(key, hash, oldValue, newValue));
    assertEquals(0, segment.count);

     *
     * @param oldValue the value that has to match and will be replaced
     * @param newValue the value used in the replacement
     */
    public void replaceIsTrue(String oldValue, Object newValue) {
        transformations.add(new ReplaceIsTrue(oldValue, MAPPER.convertValue(newValue, TextNode.class)));
    }

    /**
     * Replaces all the values of a is_false assertion for all project REST tests.