create test classe for the CSV classe

NGCC/tests/genCSV/TestCSV.java

@@ -0,0 +1,47 @@
+package genCSV;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+
+public class TestCSV {
+
+	@Test
+	public void createNullCSV() {
+		//We check if a CSV object cannot be created !
+		CSV c = new CSV();
+		assertEquals(null, c.getStudentNumber());
+		assertEquals(.0, c.getGrade());
+	}
+	
+	@Test
+	public void checkFalseStudentnumber() {
+		//We check if the student number is full composed of numeric digits !
+		String s = "056498a198";
+		assertEquals(false, CSV.checkStudentNumber(s));
+	}
+	
+	@Test
+	public void checkStudentNumberTooShort() {
+		//We check if the student number is enought long !
+		String s = "";
+		assertEquals(false, CSV.checkStudentNumber(s));
+	}
+	
+	
+	@Test
+	public void checkStudentNumberTooLong() {
+		//We check if the student number is enought short !
+		String s = "012345678910111213141516";
+		assertEquals(false, CSV.checkStudentNumber(s));
+	}
+	
+	@Test
+	public void checkCorrectStudentNumber() {
+		//We check if the student number is correct !
+		String s = "123456789";
+		assertEquals(true, CSV.checkStudentNumber(s));
+	}
+
+}