add test

hutool-cron/src/test/java/cn/hutool/cron/pattern/CronPatternBuilderTest.java

@@ -0,0 +1,44 @@
+package cn.hutool.cron.pattern;
+
+import cn.hutool.cron.CronException;
+import org.junit.Assert;
+import org.junit.Test;
+
+public class CronPatternBuilderTest {
+
+	@Test
+	public void buildMatchAllTest(){
+		String build = CronPatternBuilder.of().build();
+		Assert.assertEquals("* * * * *", build);
+
+		build = CronPatternBuilder.of()
+				.set(Part.SECOND, "*")
+				.build();
+		Assert.assertEquals("* * * * * *", build);
+
+		build = CronPatternBuilder.of()
+				.set(Part.SECOND, "*")
+				.set(Part.YEAR, "*")
+				.build();
+		Assert.assertEquals("* * * * * * *", build);
+	}
+
+	@Test
+	public void buildRangeTest(){
+		String build = CronPatternBuilder.of()
+				.set(Part.SECOND, "*")
+				.setRange(Part.HOUR, 2, 9)
+				.build();
+		Assert.assertEquals("* * 2-9 * * *", build);
+	}
+
+	@Test(expected = CronException.class)
+	public void buildRangeErrorTest(){
+		String build = CronPatternBuilder.of()
+				.set(Part.SECOND, "*")
+				// 55无效值
+				.setRange(Part.HOUR, 2, 55)
+				.build();
+		Assert.assertEquals("* * 2-9 * * *", build);
+	}
+}