Test for ORG directive (#228)

src/main/java/net/simon987/mar/server/assembly/Memory.java

@@ -192,7 +192,7 @@ public class Memory implements Target, MongoSerializable, Cloneable {
     public Memory clone() {
         Memory memory = new Memory(words.length);
         memory.words = new char[words.length];
-        System.arraycopy(memory.words, 0, words, 0, words.length);
+        System.arraycopy(words, 0, memory.words, 0, words.length);
         return memory;
     }
 }

src/test/java/net/simon987/mar/server/TestExecutionResult.java

@@ -11,7 +11,7 @@ public class TestExecutionResult {
 
     public List<FakeHardwareHost.HwiCall> hwiHistory;
 
-    private AssemblyResult ar;
+    public AssemblyResult ar;
 
     public TestExecutionResult(CpuState state, List<FakeHardwareHost.HwiCall> hwiHistory, AssemblyResult ar) {
         this.state = state;

src/test/java/net/simon987/mar/server/assembly/OrgDirectiveTest.java

@@ -0,0 +1,27 @@
+package net.simon987.mar.server.assembly;
+
+import net.simon987.mar.server.TestExecutionResult;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class OrgDirectiveTest {
+
+    @Test
+    public void orgWikiExample() {
+        String code = "" +
+                "ORG 0x8000            \n" +
+                "my_var: DW 0x1234     \n" +
+                ".text                 \n" +
+                "MOV A, my_var       \n" +
+                "brk                   \n";
+
+        TestExecutionResult res = TestHelper.executeCode(code);
+
+        assertTrue(res.ar.exceptions.isEmpty());
+        assertEquals(0x8000, res.ar.origin);
+        assertEquals(0x1234, res.memValue(0x8000));
+        assertEquals(0x8000, res.regValue("A"));
+    }
+}