Add units tests

nb-configuration.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project-shared-configuration>
+    <!--
+This file contains additional configuration written by modules in the NetBeans IDE.
+The configuration is intended to be shared among all the users of project and
+therefore it is assumed to be part of version control checkout.
+Without this configuration present, some functionality in the IDE may be limited or fail altogether.
+-->
+    <properties xmlns="http://www.netbeans.org/ns/maven-properties-data/1">
+        <!--
+Properties that influence various parts of the IDE, especially code formatting and the like. 
+You can copy and paste the single properties, into the pom.xml file and the IDE will pick them up.
+That way multiple projects can share the same settings (useful for formatting rules for example).
+Any value defined here will override the pom.xml file value but is only applicable to the current project.
+-->
+        <netbeans.compile.on.save>all</netbeans.compile.on.save>
+    </properties>
+</project-shared-configuration>

pom.xml

@@ -49,8 +49,28 @@
 			<version>3.0.10</version>
 		</dependency>
 
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter</artifactId>
+			<scope>test</scope>
+		</dependency>
+
 	</dependencies>
 
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.junit</groupId>
+				<artifactId>junit-bom</artifactId>
+				<version>5.12.2</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+
+
 	<build>
 		<plugins>
 			<plugin>
@@ -107,6 +127,32 @@
 					</execution>
 				</executions>
 			</plugin>
+
+
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-enforcer-plugin</artifactId>
+				<version>3.5.0</version>
+				<executions>
+					<execution>
+						<id>enforce-versions</id>
+						<goals>
+							<goal>enforce</goal>
+						</goals>
+						<configuration>
+							<rules>
+								<requireMavenVersion>
+									<version>3.6.3</version>
+								</requireMavenVersion>
+								<requireJavaVersion>
+									<version>21</version>
+								</requireJavaVersion>
+							</rules>
+						</configuration>
+					</execution>
+				</executions>
+			</plugin>
+
 		</plugins>
 	</build>
 

src/main/java/org/editor/CanvasFrame.java

@@ -105,6 +105,7 @@ protected void paintComponent(Graphics g) {
 		g2.setColor(Color.BLACK);
 		gfx = g2;
 		if (!Compiler.main_loop.isEmpty()) {
+			Context.top.pushStack();
 			Context.top.putLocal("dt", new PiccodeNumber(String.format("%s", deltaTime)));
 			try {
 				AccessFrame.msgs.setText("");
@@ -116,6 +117,8 @@ protected void paintComponent(Graphics g) {
 				System.out.println("ERROR: " + e.getMessage());
 				e.printStackTrace();
 				Compiler.main_loop.clear();
+			} finally {
+				Context.top.dropStackFrame();
 			}
 		}
 

src/main/java/org/piccode/backend/Compiler.java

@@ -78,6 +78,8 @@ public static void compile(String code, boolean render) {
 		} catch (Exception rte) {
 			rte.printStackTrace();
 			AccessFrame.writeError(rte.getMessage());
+		} finally {
+			Context.top.dropStackFrame();
 		}
 	}