add test

hutool-core/src/test/java/cn/hutool/core/util/IssueICA9S5Test.java

@@ -0,0 +1,15 @@
+package cn.hutool.core.util;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+public class IssueICA9S5Test {
+	@Test
+	public void test() {
+		String a = "ENUM{\\ndisable ~ 0\\nenable ~ 1\\n}";
+		final List<String> split = StrUtil.split(a, "\\n");
+		Assertions.assertEquals(4, split.size());
+	}
+}