feat: move everything to single folder

cs2030s/Lab4/Test1.java

@@ -0,0 +1,32 @@
+import java.io.PrintStream;
+import java.io.ByteArrayOutputStream;
+
+class Test1 {
+  public static void main(String[] args) {
+    CS2030STest we = new CS2030STest();
+    
+    PrintStream old = System.out;
+    ByteArrayOutputStream baos;
+    PrintStream ps;
+    
+    baos = new ByteArrayOutputStream();
+    ps = new PrintStream(baos);
+    System.setOut(ps);
+    
+    new Print().call(17);
+    we.expectPrint("new Print().call(17)",
+                   "17",
+                   baos,
+                   old);
+    
+    baos = new ByteArrayOutputStream();
+    ps = new PrintStream(baos);
+    System.setOut(ps);
+    
+    new Print().call("string");
+    we.expectPrint("new Print().call(\"string\")",
+                   "string",
+                   baos,
+                   old);
+  }
+}