tests now compile

src/test/java/no/uib/inf101/gridview/TestCellPositionToPixelConverter.java

@@ -10,6 +10,7 @@ import java.awt.*;
 import java.awt.geom.Rectangle2D;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
 import java.util.ArrayList;
 import java.util.List;
@@ -29,13 +30,33 @@ public class TestCellPositionToPixelConverter {
         grid, new Rectangle2D.Double(30, 30, 340, 240), 30);
 
     Rectangle2D expected = new Rectangle2D.Double(215, 130, 47.5, 40);
-    assertEquals(expected, converter.getBoundsForCell(new CellPosition(1, 2)));
+    assertEquals(expected, getBoundsForCell(converter, new CellPosition(1, 2)));
   }
 
   /////////////////////////////
   // Helper methods
   /////////////////////////////
 
+  static Rectangle2D getBoundsForCell(CellPositionToPixelConverter converter, CellPosition cp) {
+    try {
+      Method method = CellPositionToPixelConverter.class.getMethod("getBoundsForCell", CellPosition.class);
+      // Check that the method is public
+      assertFalse(Modifier.isPrivate(method.getModifiers()),
+          "The method getBoundsForCell(CellPosition) in the CellPositionToPixelConverter class should not be private");
+
+      Object result = method.invoke(converter, cp);
+      assertInstanceOf(Rectangle2D.class, result,
+          "The method getBoundsForCell(CellPosition) in the CellPositionToPixelConverter class should return a Rectangle2D");
+      return (Rectangle2D) result;
+    } catch (NoSuchMethodException e) {
+      fail("Could not find the method getBoundsForCell(CellPosition) in the CellPositionToPixelConverter class");
+    } catch (IllegalAccessException | InvocationTargetException e) {
+      throw new RuntimeException(e);
+    }
+    throw new IllegalStateException("Should not be possible to reach this point");
+  }
+
+
   static CellPositionToPixelConverter getConverter(GridDimension grid, Rectangle2D rect, double margin) {
     try {
       Constructor<?> constructor = CellPositionToPixelConverter.class.getConstructor(

src/test/java/no/uib/inf101/gridview/TestGridView.java

@@ -14,6 +14,7 @@ package no.uib.inf101.gridview;
 import no.uib.inf101.colorgrid.*;
 import org.junit.jupiter.api.Test;
 
+import javax.swing.JPanel;
 import java.awt.*;
 import java.awt.geom.Rectangle2D;
 import java.lang.reflect.Constructor;
@@ -28,10 +29,14 @@ public class TestGridView {
   @Test
   public void preferredSize() {
     GridView view = newGridView(null);
-    assertNotNull(view, "Unable to create a new GridView object");
-    assertNotNull(view.getPreferredSize(), "PreferredSize should not be null");
-    assertEquals(400, view.getPreferredSize().width);
-    assertEquals(300, view.getPreferredSize().height);
+    if ((Object) view instanceof JPanel panel) {
+      assertNotNull(panel, "Unable to create a new GridView object");
+      assertNotNull(panel.getPreferredSize(), "PreferredSize should not be null");
+      assertEquals(400, panel.getPreferredSize().width);
+      assertEquals(300, panel.getPreferredSize().height);
+    } else {
+      fail("The GridView class should extend JPanel");
+    }
   }
 
   @Test