Homework 3

javali_tests/HW3/ErrCallBase.javali

@@ -0,0 +1,9 @@
+// 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

@@ -0,0 +1,9 @@
+/* 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

@@ -0,0 +1,11 @@
+/* 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

@@ -0,0 +1,14 @@
+/* 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

@@ -0,0 +1,30 @@
+/* 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);
+	}
+}

javali_tests/HW3_nop90/Assignments/Errors/ArrayAreNotCovariant.javali

@@ -0,0 +1,16 @@
+// Test that arrays are not covariant
+
+class Main {
+	void main() {
+		boolean y;
+		A[] Array1;
+		B[] Array2;
+    	Array2 = new B[10];
+
+    	Array1 = Array2;
+	}
+}
+
+class B extends A {}
+
+class A {}

javali_tests/HW3_nop90/Assignments/Errors/AssignToMethodCall.javali

@@ -0,0 +1,11 @@
+// The left-hand side of an assignment cannot be a method call
+// Valid options are variable accesses, fields or an indexed array
+
+class Main {
+	void main() {
+		action() = read();
+	}
+	int action() {
+		return 0;
+	}
+}

javali_tests/HW3_nop90/Assignments/Errors/AssignToThis.javali

@@ -0,0 +1,15 @@
+// The left-hand side of an assignment cannot be a reference to this
+// Valid options are variable accesses, fields or an indexed array
+
+class Main {
+	void main () {
+		int b;
+		int[] c;
+		c = new int[5];
+		this.a = 10;
+		b = 10;
+		c[4] = 10;
+		this = null;
+	}
+	int a;
+}

javali_tests/HW3_nop90/Assignments/OkArraySubtypes.javali

@@ -0,0 +1,14 @@
+// any array is a subtype of Object
+// assignment and 'is equal' with an object of type 'Object' is fine
+
+class Main {
+	void main() {
+		boolean y;
+		Object x;
+		int[] testArray;
+		testArray = new int[10];
+		x = testArray;
+		testArray = null;
+		x = null;
+	}
+}

javali_tests/HW3_nop90/DoubleDeclarationsErrors/DoubleClass.javali

@@ -0,0 +1,8 @@
+// Multiple classes can't share the same name
+
+class Aclass {}
+class Aclass {}
+
+class Main {
+	void main() {}
+}

javali_tests/HW3_nop90/DoubleDeclarationsErrors/DoubleField.javali

@@ -0,0 +1,8 @@
+// Two fields in a class cannot share the same name
+
+class Main {
+	void main() {}
+	int a;
+	Object b;
+	Main a;
+}

javali_tests/HW3_nop90/DoubleDeclarationsErrors/DoubleLocalVar.javali

@@ -0,0 +1,8 @@
+// Two local variables in a method cannot share the same name
+
+class Main {
+	void main() {}
+	void test() {
+		int a, a;
+	}
+}

javali_tests/HW3_nop90/DoubleDeclarationsErrors/DoubleParamAndLocal.javali

@@ -0,0 +1,10 @@
+// test double declaration 
+// test local variable and parameter have same name
+
+class Main {
+	void main() {}
+	int action(int p1, boolean p2) {
+		Object p1;
+		return 1;
+	}
+}

javali_tests/HW3_nop90/DoubleDeclarationsErrors/DoubleParams.javali

@@ -0,0 +1,6 @@
+// No pair of parameters in a method declaration can have the same name
+
+class Main {
+	void main() {}
+	int action(int p1, boolean p2, Object p, Object p) {}
+}

javali_tests/HW3_nop90/DoubleDeclarationsErrors/ObjectClass.javali

@@ -0,0 +1,7 @@
+// No class can have the name "Object"
+
+class Aclass {}
+class Object extends Aclass {}
+class Main extends Object {
+	void main() {}
+}

javali_tests/HW3_nop90/EntrypointTests/ErrorMainReturnType.javali

@@ -0,0 +1,7 @@
+// Error: the return type of the "main" method must be "void"
+
+class Main {
+	int main() {
+		return 10;
+	}
+}

javali_tests/HW3_nop90/EntrypointTests/ErrorMainWithParams.javali

@@ -0,0 +1,5 @@
+// Error: the main method must have no arguments
+
+class Main {
+    void main(Object[] args) {}
+}

javali_tests/HW3_nop90/EntrypointTests/ErrorNoMainClass.javali

@@ -0,0 +1,4 @@
+// Error: there is no class called Main (case-sensitive)
+
+class MAIN {}
+class main extends Object {}

javali_tests/HW3_nop90/EntrypointTests/ErrorNoMainMethod.javali

@@ -0,0 +1,11 @@
+// Error: the "Main" class does not contain a method called "main"
+
+class Main {
+	void maini() {}
+	void mein() {}
+	void moon() {}
+}
+
+class NotMain extends Main {
+	void main() {}
+}

javali_tests/HW3_nop90/EntrypointTests/OkInheritedMainMethod.javali

@@ -0,0 +1,7 @@
+// The main method can be inherited from another class
+
+class OtherMain {
+	void main () {}
+}
+
+class Main extends OtherMain {}