validTestCaseAssertField = function (field, testCase) {
    assertColourHsvSlidersField(
      field,
      testCase.expectedValue,
      testCase.expectedText,
    );
  }
Asserts that the field properties are correct based on the test case.
@param {FieldColourHsvSliders} field The field to check.
@param {FieldValueTestCase} testCase The test case.