Gather data

src/test/java/puzzle/MainTest.java

@@ -3,10 +3,9 @@ package puzzle;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
+import puzzle.Main.PuzzleResult;
 import puzzle.SwedishGenerator.Dict;
-import puzzle.SwedishGenerator.Grid;
 import puzzle.SwedishGenerator.Lemma;
-import puzzle.SwedishGenerator.PuzzleResult;
 import puzzle.SwedishGenerator.Rng;
 import puzzle.SwedishGenerator.Slot;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -198,4 +197,27 @@ public class MainTest {
       }
       System.out.println("Test Note: Puzzle not generated in 1 attempt (this is possible depending on RNG)");
    }
+   @Test
+   public void testIsLetterA() {
+      SwedishGenerator generator = new SwedishGenerator();
+      assertTrue(generator.isLetter('A'));
+   }
+   
+   @Test
+   public void testIsLetterZ() {
+      SwedishGenerator generator = new SwedishGenerator();
+      assertTrue(generator.isLetter('Z'));
+   }
+   
+   @Test
+   public void testIsNotLetterLowercaseA() {
+      SwedishGenerator generator = new SwedishGenerator();
+      assertFalse(generator.isLetter('a'));
+   }
+   
+   @Test
+   public void testIsNotLetterSymbol() {
+      SwedishGenerator generator = new SwedishGenerator();
+      assertFalse(generator.isLetter('@'));
+   }
 }