Added a testing nasal file

testing_files/nasal_test.nas

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+#//This is written for Nasal Intepreter
+#//Sidi Liang
+
+var w = 1;
+var x = "hello";
+var f = func(){
+    print("f is called");
+}
+var f2 = func(){
+    return 2;
+}
+var f3 = func(){
+    return "numb";
+}
+var y = [w, x];
+var y1 = [w, x, y, f];
+var z = {
+    numb:w,
+    stri:x,
+    listt:y1,
+    funcc: f,
+    funcccall: func f(),
+};
+var z1 = {
+    numb:w,
+    stri:x,
+    listt:y,
+    hashh:z
+};
+var y2 = [w, x, y, z1];
+
+var z2 = {
+    hashh: z1,
+    listt2: y2,
+};
+
+print(w);#//1
+print("\n");
+print(x);#//hello
+print("\n");
+print(y);#//Empty
+print("\n");
+print(z);#//Empty
+print("\n");
+print(z1);#//Empty
+print("\n");
+print(y2);#//Empty
+print("\n");
+print(y[0]);#//1
+print("\n");
+print(y1[2][1]);#//hello
+print("\n");
+print(z.numb);#//1
+print("\n");
+print(z.listt[2][1]);#//hello
+print("\n");
+print(z1.hashh.listt[2][1]);#//hello
+print("\n");
+print(y2[3].hashh.listt[2][1]);#//hello
+print("\n");
+print(f);#//Empty
+print("\n");
+f();#//f is called
+print("\n");
+print(z.funcc);#//Empty
+print("\n");
+z.funcc();#//f is called
+print("\n");
+print(z.funcccall);#//Empty
+print("\n");
+z.funcccall();#//f is called
+print("\n");
+z2.listt2[3].hashh.funcc();#//f is called
+print("\n");
+print(y1[f2()][w]);#//hello
+print("\n");
+#//print(z.f3()); Error
+call(f);#//f is called
+print("\n");
+call(z.funcc);#//f is called
+print("\n");
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