add test to try things out

src/test/java/parser/GeneralTest.java

@@ -0,0 +1,42 @@
+package parser;
+
+import lexer.StupsLexer;
+import org.antlr.v4.runtime.CharStreams;
+import org.antlr.v4.runtime.Lexer;
+import org.junit.jupiter.api.Test;
+import parser.grammar.Grammar;
+import util.ast.AST;
+
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+class GeneralTest {
+
+    private Lexer initLexer(String program) {
+        try {
+            Path path = Paths.get(this.getClass().getClassLoader().getResource("examplePrograms/" + program).toURI());
+            String programCode = Files.readString(path, StandardCharsets.US_ASCII);
+            return new StupsLexer(CharStreams.fromString(programCode));
+        } catch (Exception ignore) {
+            ignore.printStackTrace();
+        }
+
+        return null;
+    }
+
+    @Test
+    void testClean() 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);
+    }
+}

src/test/resources/examplePrograms/General.stups

@@ -0,0 +1,6 @@
+class MyClass {
+
+    public static void main(String[] args) {
+        int a = (1 + 2) * 3;
+    }
+}