First modarith test

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

@@ -0,0 +1,61 @@
+package net.runelite.deob.deobfuscators.arithmetic;
+
+import java.io.DataInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import net.runelite.deob.ClassFile;
+import net.runelite.deob.ClassGroup;
+import net.runelite.deob.Deobfuscator;
+import net.runelite.deob.attributes.Code;
+import net.runelite.deob.attributes.code.Instruction;
+import net.runelite.deob.attributes.code.Instructions;
+import net.runelite.deob.attributes.code.instructions.LDC_W;
+import org.junit.Assert;
+import org.junit.Test;
+
+class TestClass
+{
+        private static int dummy(Object... args) { return 0; }
+	
+        public int field1051 = -1611704481;
+
+        public void test()
+        {
+                if(-1 != this.field1051 * 1928543073)
+		{
+                        dummy(this.field1051 * 1928543073);
+                        this.field1051 = dummy() * 1611704481;
+                }
+        }
+}
+
+public class ModArithTest
+{
+	@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);
+		
+		Code code = cf.findMethod("test").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()));
+			}
+	}
+}