diff --git a/src/test/java/com/blankj/easy/_028/SolutionTest.java b/src/test/java/com/blankj/easy/_028/SolutionTest.java
new file mode 100644
index 00000000..40e73b2f
--- /dev/null
+++ b/src/test/java/com/blankj/easy/_028/SolutionTest.java
@@ -0,0 +1,43 @@
+package com.blankj.easy._028;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class SolutionTest {
+    Solution solution = new Solution();
+    @Test
+    public void TestImplementStrWithNeedleIsPartOfHayStack(){
+        Integer actual = solution.strStr("1,2,3,4", "1,2");
+        Integer expected = 0;
+        assertEquals(actual, expected);
+    }
+
+    @Test
+    public void TestImplementStrWithNeedleIsNotPartOfHayStack(){
+        Integer actual = solution.strStr("1,2,3,4", "2,1");
+        Integer expected = -1;
+        assertEquals(actual, expected);
+    }
+
+    @Test
+    public void TestImplementStrWithNeedleIsNone(){
+        Integer actual = solution.strStr("1,2,3,4", "");
+        Integer expected = 0;
+        assertEquals(actual, expected);
+    }
+
+    @Test
+    public void TestImplementStrWithLenNeedleGreaterThanLenHayStack(){
+        Integer actual = solution.strStr("1,2,3,4", "1,2,3,4,5");
+        Integer expected = -1;
+        assertEquals(actual, expected);
+    }
+
+    @Test
+    public void TestImplementStrWithLenNeedleEqualToLenHayStack(){
+        Integer actual = solution.strStr("1,2,3,4", "1,2,3,4");
+        Integer expected = 0;
+        assertEquals(actual, expected);
+    }
+
+}
\ No newline at end of file