Added main test file

Author: komalvenugopal

src/test/java/com/cmpe202/individualproject/main/AppTest.java

@@ -0,0 +1,26 @@
+package com.cmpe202.individualproject.main;
+
+import org.junit.Assert;
+import org.junit.jupiter.api.Test;
+
+class AppTest {
+
+    @Test
+    void checkforValidFileType() {
+        // Test case for checking a valid file type
+        String inputFile = "src/test/java/sampleFiles/inputxmlcopy.xml";
+        App appObj = new App();
+        String result = appObj.getFileType(inputFile);
+        Assert.assertEquals(result, "xml");
+    }
+
+    @Test
+    void checkforInvalidFileType() {
+        // Test case for checking an invalid file type
+        String inputFile = "src/test/java/sampleFiles/inputxmlcopy.xml";
+        App appObj = new App();
+        String result = appObj.getFileType(inputFile);
+        Assert.assertNotEquals(result, "json");
+    }
+
+}