test: writeToFile method in Course class

src/test/java/org/example/CourseTest.java

@@ -6,6 +6,9 @@ import static org.junit.jupiter.api.Assertions.*;
 import java.io.ByteArrayOutputStream;
 import java.io.PrintStream;
 import static org.junit.Assert.assertEquals;
+import java.io.*;
+import java.util.List;
+
 
 class CourseTest {
 
@@ -41,4 +44,32 @@ class CourseTest {
         assertEquals(expectedCourseCode, outputLines[1].trim());
         assertEquals(expectedCourseCredits, outputLines[2].trim());
     }
+
+    @Test
+    void writeToFile() {
+        // Create a temporary file for testing
+        String filename = "test_course_data.txt";
+
+        // Create a new course
+        Course course = new Course("Math", "C101", 3);
+
+        // Write course data to the temporary file
+        course.writeToFile(filename);
+
+        // Read course data from the temporary file
+        List<Course> courses = Course.readFromFile(filename);
+
+        // Assert that the read data matches the original course
+        assertEquals(1, courses.size());
+        Course readCourse = courses.get(0);
+        assertEquals("Math", readCourse.getCourseName());
+        assertEquals(3, readCourse.getCourseCredit());
+
+        // Delete the temporary file
+        File file = new File(filename);
+        if (file.exists()) {
+            file.delete();
+        }
+
+    }
 }