Add oving 2

src/test/java/oving2/LineEditorTest.java

@@ -0,0 +1,196 @@
+package oving2;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+public class LineEditorTest {
+
+	private LineEditor lineEditor;
+
+	@BeforeEach
+	public void setUp() {
+		lineEditor = new LineEditor();
+	}
+
+	@Test
+	@DisplayName("Private fields")
+	public void testPrivateFields() {
+		TestHelper.checkIfFieldsPrivate(LineEditor.class);
+	}
+
+	@Test
+	public void testConstructor() {
+		assertEquals("", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+	}
+
+	@Test
+	public void testGetSetText() {
+		lineEditor.setText("ABC");
+		assertEquals("ABC", lineEditor.getText());
+		assertEquals(3, lineEditor.getInsertionIndex());
+
+		lineEditor.setText("");
+		assertEquals("", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			lineEditor.setText(null);
+		}, "Cannot set text to null");
+	}
+
+	@Test
+	public void testGetSetInsertionIndex() {
+		lineEditor.setText("ABC");
+		assertEquals("ABC", lineEditor.getText());
+		assertEquals(3, lineEditor.getInsertionIndex());
+
+		lineEditor.setInsertionIndex(0);
+		assertEquals("ABC", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		lineEditor.setInsertionIndex(3);
+		assertEquals("ABC", lineEditor.getText());
+		assertEquals(3, lineEditor.getInsertionIndex());
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			lineEditor.setInsertionIndex(-1);
+		});
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			lineEditor.setInsertionIndex(4);
+		});
+	}
+
+	@Test
+	public void testLeft() {
+		lineEditor.setText("Ja");
+		lineEditor.setInsertionIndex(2);
+		lineEditor.left();
+		assertEquals("Ja", lineEditor.getText());
+		assertEquals(1, lineEditor.getInsertionIndex());
+
+		lineEditor.left();
+		assertEquals("Ja", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		lineEditor.left();
+		assertEquals("Ja", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+	}
+
+	@Test
+	public void testRight() {
+		lineEditor.setText("Ja");
+		lineEditor.setInsertionIndex(0);
+		lineEditor.right();
+		assertEquals("Ja", lineEditor.getText());
+		assertEquals(1, lineEditor.getInsertionIndex());
+
+		lineEditor.right();
+		lineEditor.setText("Ja");
+		assertEquals(2, lineEditor.getInsertionIndex());
+
+		lineEditor.right();
+		lineEditor.setText("Ja");
+		assertEquals(2, lineEditor.getInsertionIndex());
+	}
+
+	@Test
+	public void testDeleteLeft() {
+		lineEditor.setText("Ja");
+		lineEditor.setInsertionIndex(0);
+		lineEditor.deleteLeft();
+		assertEquals("Ja", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		lineEditor.setInsertionIndex(1);
+		lineEditor.deleteLeft();
+		assertEquals("a", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		lineEditor.deleteLeft();
+		assertEquals("a", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		lineEditor.setText("Ja");
+		lineEditor.setInsertionIndex(2);
+		lineEditor.deleteLeft();
+		assertEquals("J", lineEditor.getText());
+		assertEquals(1, lineEditor.getInsertionIndex());
+
+		lineEditor.deleteLeft();
+		assertEquals("", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		lineEditor.deleteLeft();
+		assertEquals("", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+	}
+
+	@Test
+	public void testDeleteRight() {
+		lineEditor.setText("Ja");
+		lineEditor.setInsertionIndex(2);
+		lineEditor.deleteRight();
+		assertEquals("Ja", lineEditor.getText());
+		assertEquals(2, lineEditor.getInsertionIndex());
+
+		lineEditor.setInsertionIndex(1);
+		lineEditor.deleteRight();
+		assertEquals("J", lineEditor.getText());
+		assertEquals(1, lineEditor.getInsertionIndex());
+
+		lineEditor.deleteRight();
+		assertEquals("J", lineEditor.getText());
+		assertEquals(1, lineEditor.getInsertionIndex());
+
+		lineEditor.setText("Ja");
+		lineEditor.setInsertionIndex(0);
+		lineEditor.deleteRight();
+		assertEquals("a", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		lineEditor.deleteRight();
+		assertEquals("", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		lineEditor.deleteRight();
+		assertEquals("", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+	}
+
+	@Test
+	public void testInsertString() {
+		lineEditor.insertString("");
+		assertEquals("", lineEditor.getText());
+		assertEquals(0, lineEditor.getInsertionIndex());
+
+		lineEditor.insertString("Java");
+		assertEquals("Java", lineEditor.getText());
+		assertEquals(4, lineEditor.getInsertionIndex());
+
+		lineEditor.insertString(" er gøy!");
+		assertEquals("Java er gøy!", lineEditor.getText());
+		assertEquals(12, lineEditor.getInsertionIndex());
+
+		lineEditor.setText("Javagøy!");
+		lineEditor.setInsertionIndex(4);
+		lineEditor.insertString(" er ");
+		assertEquals("Java er gøy!", lineEditor.getText());
+		assertEquals(8, lineEditor.getInsertionIndex());
+
+		lineEditor.setText("er gøy!");
+		lineEditor.setInsertionIndex(0);
+		lineEditor.insertString("Java ");
+		assertEquals("Java er gøy!", lineEditor.getText());
+		assertEquals(5, lineEditor.getInsertionIndex());
+
+		assertThrows(IllegalArgumentException.class, () -> {
+			lineEditor.insertString(null);
+		}, "Cannot insert null");
+	}
+}