update tests

src/test/java/parser/Demo.java

@@ -6,6 +6,7 @@ import org.antlr.v4.runtime.Lexer;
 import org.junit.jupiter.api.Test;
 import parser.ast.AST;
 import parser.ast.ASTCompacter;
+import parser.ast.ExpressionBalancer;
 import parser.grammar.Grammar;
 
 import java.io.IOException;
@@ -30,7 +31,7 @@ class Demo {
     }
 
     @Test
-    void demo() throws URISyntaxException, IOException {
+    void demoClean() throws URISyntaxException, IOException {
         Path path = Paths.get(this.getClass().getClassLoader().getResource("exampleGrammars/Grammar.grammar").toURI());
         Grammar grammar = Grammar.fromFile(path);
         LL1Parser parser = LL1Parser.fromGrammar(grammar);
@@ -40,4 +41,17 @@ class Demo {
 
         ASTCompacter.clean(tree, grammar);
     }
+
+    @Test
+    void demoBalance() throws URISyntaxException, IOException {
+        Path path = Paths.get(this.getClass().getClassLoader().getResource("exampleGrammars/Grammar.grammar").toURI());
+        Grammar grammar = Grammar.fromFile(path);
+        LL1Parser parser = LL1Parser.fromGrammar(grammar);
+
+        Lexer lex = this.initLexer("General.stups");
+        AST tree = parser.parse(lex.getAllTokens(), lex.getVocabulary());
+
+        ASTCompacter.clean(tree, grammar);
+        ExpressionBalancer.balance(tree);
+    }
 }

src/test/java/parser/ast/ASTCompacterTest.java

@@ -1,11 +1,10 @@
-package parser;
+package parser.ast;
 
 import lexer.StupsLexer;
 import org.antlr.v4.runtime.CharStreams;
 import org.antlr.v4.runtime.Lexer;
 import org.junit.jupiter.api.Test;
-import parser.ast.AST;
-import parser.ast.ASTCompacter;
+import parser.LL1Parser;
 import parser.grammar.Grammar;
 
 import java.io.IOException;
@@ -82,6 +81,6 @@ class ASTCompacterTest {
 
         ASTCompacter.clean(tree, grammar);
 
-        assertThat(tree.size()).isEqualTo(33);
+        assertThat(tree.size()).isEqualTo(31);
     }
 }

src/test/java/parser/ast/ExpressionBalancerTest.java

@@ -66,6 +66,18 @@ class ExpressionBalancerTest {
         assertThat(tree.getRoot().getChildren().get(1).getName()).isEqualTo("EXPR");
     }
 
+    @Test
+    void testTree1Flip2x() {
+        AST tree = tree1();
+        System.out.println("Before:\n" + tree);
+
+        ExpressionBalancer.flip(tree);
+        ExpressionBalancer.flip(tree);
+        System.out.println("After:\n" + tree);
+
+        assertThat(tree).isEqualTo(tree1());
+    }
+
     @Test
     void testTree2Flip() {
         AST tree = tree2();
@@ -80,6 +92,18 @@ class ExpressionBalancerTest {
         assertThat(tree.getRoot().getChildren().get(1).getChildren().get(1).getName()).isEqualTo("EXPR");
     }
 
+    @Test
+    void testTree2Flip2x() {
+        AST tree = tree2();
+        System.out.println("Before:\n" + tree);
+
+        ExpressionBalancer.flip(tree);
+        ExpressionBalancer.flip(tree);
+        System.out.println("After:\n" + tree);
+
+        assertThat(tree).isEqualTo(tree2());
+    }
+
     @Test
     void testTree1Rotate() {
         AST tree = tree1();
@@ -90,6 +114,7 @@ class ExpressionBalancerTest {
         System.out.println("After:\n" + tree);
 
         assertThat(tree.size()).isEqualTo(3);
+        assertThat(tree.getRoot().getValue()).isEqualTo("SUB");
     }
 
     @Test
@@ -102,5 +127,6 @@ class ExpressionBalancerTest {
         System.out.println("After:\n" + tree);
 
         assertThat(tree.size()).isEqualTo(5);
+        assertThat(tree.getRoot().getValue()).isEqualTo("SUB");
     }
 }

src/test/resources/examplePrograms/General.stups

@@ -1,6 +1,7 @@
 class MyClass {
 
     public static void main(String[] args) {
-        int a = (1 + 2) * 3;
+        while (1 < 2)
+            i = 1;
     }
 }