Add junit tests + fix form errors and Parser.isCorrect

test/lsystem/TestLSystem.java

@@ -0,0 +1,50 @@
+package lsystem;
+
+import lsystem.engine.Parser;
+import lsystem.engine.Rewrite;
+import lsystem.screen.gl3d.GLCanvas;
+import lsystem.utils.Pair;
+import org.junit.Test;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static org.junit.Assert.*;
+
+public class TestLSystem {
+
+    @Test
+    public void parserTest() {
+        GLCanvas joglFrame = new GLCanvas();
+        Parser parser = new Parser("X", Arrays.asList("X=XY", "Y=X"), 5);
+        List<Pair<String, String>> lSystemRules = parser.parseRules();
+        joglFrame.setLSystem(parser.getAxiom(), lSystemRules, parser.getNbIterations());
+        System.out.println(joglFrame.getLSystem());
+        assertNotNull("L-System should not be null", joglFrame.getLSystem());
+    }
+
+    @Test
+    public void rewriteTest(){
+        Parser parser = new Parser("X", Arrays.asList("X=XY", "Y=X"), 7);
+        String result = Rewrite.rewrite(parser.getAxiom(), parser.parseRules(), parser.getNbIterations());
+        assertEquals("Not equals", "XYXXYXYXXYXXYXYXXYXYXXYXXYXYXXYXXY", result);
+    }
+
+    @Test
+    public void incorrectTest() {
+        Parser parser = new Parser("X", Arrays.asList("X=XY", "y=X"), 3);
+        assertTrue(parser.isCorrect());
+        parser = new Parser("X", Arrays.asList("X+XY" , "Y=X"), 3);
+        assertFalse(parser.isCorrect());
+        parser = new Parser("X", Arrays.asList("X=X++Y", "Y=X"), 3);
+        assertTrue(parser.isCorrect());
+        try {
+            assertNotNull(Parser.parse(Rewrite.rewrite("X", new Parser("X", Arrays.asList("X=XY", "Y=X"), 3).parseRules(), 3)));
+        } catch (NumberFormatException err) {
+            System.out.println("fail");
+            err.printStackTrace();
+            fail();
+        }
+    }
+
+}