Added failing negative mul test

src/test/java/net/runelite/deob/deobfuscators/arithmetic/ModArithTest.java

@@ -16,7 +16,10 @@ import org.junit.Test;
 
 class TestClass
 {
-	private static int dummy(Object... args) { return 0; }
+	private static int dummy(Object... args)
+	{
+		return 0;
+	}
 
 	private int field1051 = -1611704481;
 	private int field2701;
@@ -26,7 +29,7 @@ class TestClass
 	{
 		TestClass tc = new TestClass(); // to trick executor to call the constructor
 		int var = 42;
-		
+
 		if (-1 != this.field1051 * 1928543073)
 		{
 			dummy(this.field1051 * 1928543073);
@@ -37,7 +40,7 @@ class TestClass
 		{
 			field2701 += -1868498967 * var;
 		}
-		
+
 		field2138 = tc.dummy() * 1510226873;
 		field2130 = 572701809 * tc.field2138;
 		if (-1722291303 * field2130 >= var)
@@ -47,6 +50,27 @@ class TestClass
 	}
 }
 
+class TestClass2
+{
+	int field2863;
+	int array[];
+
+	public void test()
+	{
+		TestClass2 tc = new TestClass2();
+		
+		field2863 = -1446933277;
+		
+		array[378529589 * tc.field2863] = 1;
+
+		int var = 32;
+
+		tc.field2863 = var * 1446933277;
+
+		array[378529589 * tc.field2863] = 1;
+	}
+}
+
 public class ModArithTest
 {
 	private void checkConstants(ClassFile cf)
@@ -56,31 +80,71 @@ public class ModArithTest
 			Code code = m.getCode();
 			Instructions instructions = code.getInstructions();
 			for (Instruction i : instructions.getInstructions())
+			{
 				if (i instanceof LDC_W)
 				{
 					LDC_W ldc = (LDC_W) i;
 					Assert.assertFalse(DMath.isBig(ldc.getConstantAsInt()));
 				}
+			}
 		}
 	}
+
 	@Test
 	public void test() throws IOException
 	{
 		InputStream in = this.getClass().getClassLoader().getResourceAsStream("net/runelite/deob/deobfuscators/arithmetic/TestClass.class");
 		Assert.assertNotNull(in);
-		
+
 		ClassGroup group = new ClassGroup();
-		
+
 		ClassFile cf = new ClassFile(group, new DataInputStream(in));
 		group.addClass(cf);
-		
+
 		ModArith d1 = new ModArith();
 		d1.run(group);
 		d1.runOnce();
-		
+
 		Deobfuscator d2 = new MultiplicationDeobfuscator();
 		d2.run(group);
-		
+
 		this.checkConstants(cf);
 	}
+
+	@Test
+	public void test2() throws IOException
+	{
+		InputStream in = this.getClass().getClassLoader().getResourceAsStream("net/runelite/deob/deobfuscators/arithmetic/TestClass2.class");
+		Assert.assertNotNull(in);
+
+		ClassGroup group = new ClassGroup();
+
+		ClassFile cf = new ClassFile(group, new DataInputStream(in));
+		group.addClass(cf);
+
+		ModArith d1 = new ModArith();
+		d1.run(group);
+		
+		int last = -1, cur;
+		while ((cur = d1.runOnce()) > 0)
+		{
+			Deobfuscator d2 = new MultiplicationDeobfuscator();
+			d2.run(group);
+			
+			new MultiplyOneDeobfuscator().run(group);
+
+			new MultiplyZeroDeobfuscator().run(group);
+		
+			if (last == cur)
+				break;
+			
+			last = cur;
+		}
+		
+		Encryption e = d1.getEncryption();
+		
+		Pair pair = e.getField(cf.findField("field2863").getPoolField());
+		
+		Assert.assertEquals(378529589, (int) pair.getter);
+	}
 }