[feature] 添加长安十二时辰与现代时间的互转

hutool-core/src/test/java/org/dromara/hutool/core/date/chinese/ChangAnTimeConverterTest.java

@@ -0,0 +1,38 @@
+package org.dromara.hutool.core.date.chinese;
+
+import org.dromara.hutool.core.date.DateBetween;
+import org.dromara.hutool.core.date.DateUnit;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+/**
+ * ChangAnTimeConverterTest
+ *
+ * @author achao@apache.org
+ */
+public class ChangAnTimeConverterTest {
+
+	@Test
+	void testToModernTimeForAllTimes() {
+		// 测试每个时辰的转换
+		String[] times = {"子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申", "酉", "戌", "亥"};
+		int[] expectedHours = {2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2};
+		for (int i = 0; i < times.length; i++) {
+			DateBetween dateBetween = ChangAnTimeConverter.toModernTime(times[i] + "时");
+			long hoursBetween = dateBetween.between(DateUnit.HOUR);
+			Assertions.assertEquals(expectedHours[i], hoursBetween, times[i] + "时 should last for 2 hours.");
+		}
+	}
+
+	@Test
+	void testToChangAnTimeForAllHours() {
+		// 从23时开始测试，因为子时开始于23时
+		String[] expectedTimes = {"子时", "丑时", "丑时", "寅时", "寅时", "卯时", "卯时", "辰时", "辰时", "巳时", "巳时", "午时", "午时", "未时", "未时", "申时", "申时", "酉时", "酉时", "戌时", "戌时", "亥时", "亥时", "子时"};
+		for (int hour = 0; hour < 24; hour++) {
+			String expectedTime = expectedTimes[hour];
+			String actualTime = ChangAnTimeConverter.toChangAnTime(hour);
+			Assertions.assertEquals(expectedTime, actualTime, "Hour " + hour + " should be in " + expectedTime);
+		}
+	}
+
+}