Homework 3

javali_tests/HW3/ErrCallBase.javali

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+// Test that you cannot invoke a method on an integer.
+
+class Main {
+	void main() {
+		int x;
+		x = 1;
+		x.foo();
+	}
+}

javali_tests/HW3/ErrCircularInheritance.javali

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+/* Test that the circular inheritance between Foo and Bar is detected */
+class Foo extends Bar { }
+class Bar extends Foo { }
+
+class Main {
+   void main() {
+      writeln();
+   }
+}

javali_tests/HW3/ErrIfCondition.javali

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+/* Test that if conditions must be boolean */
+class Main {
+   void main() {
+      if (84 / 2) {
+         write(1); 
+         writeln();
+      }
+      write(2); 
+      writeln();
+   }
+}

javali_tests/HW3/ErrUnknownField1.javali

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+/* Test that an invalid field name is detected */
+
+class X {
+	int field;
+}
+
+class Main {
+   void main() {
+      X x;
+		x = new X();
+		x.field = 0;
+		x.notafield = 1;    /* ILLEGAL: bad field name */
+	}
+}

javali_tests/HW3/OkInheritanceFields.javali

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+/* Test that fields are inherited */
+
+class A {
+   int foo;
+}
+
+class B extends A {
+   int bar;
+}
+ 
+class Main {
+   void main() {
+      A a;
+		B b;
+		
+      a = new A();
+		a.foo = 1;
+		write(a.foo);
+		
+		a = new B();
+		a.foo = 2;
+		write(a.foo);
+		
+		b = new B();
+		b.foo = 3;
+		b.bar = 4;
+		write(b.foo);
+		write(b.bar);
+	}
+}