diff --git a/app/src/test/java/com/example/harmonyhub/components/FriendCardTest.kt b/app/src/test/java/com/example/harmonyhub/components/FriendCardTest.kt
new file mode 100644
index 0000000..6312b69
--- /dev/null
+++ b/app/src/test/java/com/example/harmonyhub/components/FriendCardTest.kt
@@ -0,0 +1,26 @@
+package com.example.harmonyhub.components
+
+import com.example.harmonyhub.ui.components.Friend
+import com.example.harmonyhub.ui.components.contains
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class FriendCardTest {
+    @Test
+    fun testContains() {
+        val friend =  Friend("nalgnaohel", "lanlehoang8124@gmail.com", 2)
+        assertEquals(friend.contains("nalgnaohel"), true)
+    }
+
+    @Test
+    fun testNoContains() {
+        val friend = Friend("nalgnaohel", "lanlehoang8124@gmail.com", 2)
+        assertEquals(friend.contains("Penta"), false)
+    }
+
+    @Test
+    fun testIgnoreCaseFalse() {
+        val friend = Friend("nalgnaohel", "lanlehoang8124@gmail.com", 2)
+        assertEquals(friend.contains("nALgnaohel", ignoreCase = false), false)
+    }
+}
\ No newline at end of file
diff --git a/app/src/test/java/com/example/harmonyhub/components/PlaylistCardTest.kt b/app/src/test/java/com/example/harmonyhub/components/PlaylistCardTest.kt
new file mode 100644
index 0000000..c961343
--- /dev/null
+++ b/app/src/test/java/com/example/harmonyhub/components/PlaylistCardTest.kt
@@ -0,0 +1,29 @@
+package com.example.harmonyhub.components
+
+import com.example.harmonyhub.ui.components.Playlist
+import com.example.harmonyhub.ui.components.contains
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class PlaylistCardTest {
+    @Test
+    fun testContains() {
+        // Test the PlaylistCard
+        var playlist = Playlist("Mood In Mind", 1);
+        assertEquals(playlist.contains("Mood"), true);
+    }
+
+    @Test
+    fun testNoContains() {
+        // Test the PlaylistCard
+        var playlist = Playlist("Mood In Mind", 1);
+        assertEquals(playlist.contains("Penta"), false);
+    }
+
+    @Test
+    fun testIgnoreCaseFalse() {
+        // Test the PlaylistCard
+        var playlist = Playlist("Mood In Mind", 1);
+        assertEquals(false, playlist.contains("mood", ignoreCase = false));
+    }
+}
\ No newline at end of file
diff --git a/app/src/test/java/com/example/harmonyhub/components/SongCardTest.kt b/app/src/test/java/com/example/harmonyhub/components/SongCardTest.kt
index acc1c4f..0e7cb7d 100644
--- a/app/src/test/java/com/example/harmonyhub/components/SongCardTest.kt
+++ b/app/src/test/java/com/example/harmonyhub/components/SongCardTest.kt
@@ -26,4 +26,11 @@ class SongCardTest {
         var song = Song("1", "Conditionally", "Katy Perry", "imageResId", "url");
         assertEquals(song.contains("Taylor"), false);
     }
+
+    @Test
+    fun testIgnoreCaseFalse() {
+        // Test the SongCard
+        var song = Song("1", "Conditionally", "Katy Perry", "imageResId", "url");
+        assertEquals(false, song.contains("perry", ignoreCase = false));
+    }
 }
\ No newline at end of file