Added Unit Tests

src/test/java/dotsandboxes/DotsAndBoxesGridTest.java

@@ -2,7 +2,6 @@ package dotsandboxes;
 
 import org.junit.jupiter.api.*;
 import static org.junit.jupiter.api.Assertions.*;
-import static org.junit.jupiter.api.Assumptions.*;
 
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
@@ -28,4 +27,71 @@ public class DotsAndBoxesGridTest {
     }
 
     // FIXME: You need to write tests for the two known bugs in the code.
+
+
+    @Test
+    public void testDrawHorizontalLineTwiceThrowsException() {
+        DotsAndBoxesGrid grid = new DotsAndBoxesGrid(3, 3, 2);
+
+        grid.drawHorizontal(0, 0, 1);
+
+        Exception exception = assertThrows(IllegalStateException.class, () -> {
+            grid.drawHorizontal(0, 0, 1);
+        });
+
+        String expectedMessage = "Line has already been drawn";
+        String actualMessage = exception.getMessage();
+
+        assertTrue(actualMessage.contains(expectedMessage), "Expected an IllegalStateException for drawing a line that was already drawn");
+    }
+
+    @Test
+    public void testDrawVerticalLineTwiceThrowsException() {
+        DotsAndBoxesGrid grid = new DotsAndBoxesGrid(3, 3, 2);
+
+        grid.drawVertical(0, 0, 1);
+
+        Exception exception = assertThrows(IllegalStateException.class, () -> {
+            grid.drawVertical(0, 0, 1);
+        });
+
+        String expectedMessage = "Line has already been drawn";
+        String actualMessage = exception.getMessage();
+
+        assertTrue(actualMessage.contains(expectedMessage), "Expected an IllegalStateException for drawing a line that was already drawn");
+    }
+
+    @Test
+    public void testBoxIncompleteAtLeftEdge() {
+        DotsAndBoxesGrid grid = new DotsAndBoxesGrid(3, 3, 2);
+
+        // Draw three lines around the box at (0,1)
+        grid.drawHorizontal(0, 1, 1);
+        grid.drawHorizontal(0, 2, 1);
+        grid.drawVertical(0, 1, 1);
+
+        assertFalse(grid.boxComplete(0, 1), "The box at (0,1) should not be complete with only three lines drawn");
+    }
+
+    @Test
+    public void testBoxIncomplete() {
+        DotsAndBoxesGrid grid = new DotsAndBoxesGrid(3, 3, 2);
+
+        // Draw only one horizontal line
+        grid.drawHorizontal(0, 0, 1);
+
+        assertFalse(grid.boxComplete(0, 0), "The box at (0,0) should not be complete with only one line drawn");
+
+        // Draw two lines (horizontal and vertical)
+        grid.drawVertical(0, 0, 1);
+
+        assertFalse(grid.boxComplete(0, 0), "The box at (0,0) should not be complete with only two lines drawn");
+
+        // Draw three lines
+        grid.drawHorizontal(0, 1, 1);
+
+        assertFalse(grid.boxComplete(0, 0), "The box at (0,0) should not be complete with only three lines drawn");
+    }
+
+
 }