@Test
public void testCalcFeatureDistanceWithDiff() throws Exception {

	Color[][] feature1 = new Color[5][5];
	Color[][] feature2 = new Color[5][5];
	for (int i = 0; i < 5; i++) {
		for (int j = 0; j < 5; j++) {
			feature1[i][j] = new Color(0xff, 0xff, 0xff);
			feature2[i][j] = new Color(0x00, 0x00, 0x00);
		}
	}
	double actual = SimilarityUtils.calcFeatureDistance(feature1, feature2);
	// expectedの値は事前に計算したSimilarityUtils.calcFeatureDistanceの結果を使用
	assertThat(actual, is(1.0));
}