@Test
public void createApplicationJsonContentTypeShouldReturnSameInstanceWhenDefaultBuiltInInstanceAlreadyExists() {

	// Given
	String applicationJsonContentTypeString = "application/json";
	// When
	ContentType applicationJsonContentType = ContentType.createContentType(applicationJsonContentTypeString);
	ContentType otherApplicationJsonContentType = ContentType.createContentType(applicationJsonContentTypeString);
	// Then
	assertTrue(applicationJsonContentType == otherApplicationJsonContentType);
}