Examples of com.google.javascript.rhino.jstype.ObjectType

Package com.google.javascript.rhino.jstype

Examples of com.google.javascript.rhino.jstype.ObjectType

com.google.javascript.rhino.jstype.ObjectType
Object type. In JavaScript, all object types have properties, and each of those properties has a type. Property types may be DECLARED, INFERRED, or UNKNOWN. DECLARED properties have an explicit type annotation, as in: /xx @type {number} x/ Foo.prototype.bar = 1; This property may only hold number values, and an assignment to any other type of value is an error. INFERRED properties do not have an explicit type annotation. Rather, we try to find all the possible types that this property can hold. Foo.prototype.bar = 1; If the programmer assigns other types of values to this property, the property will take on the union of all these types. UNKNOWN properties are properties on the UNKNOWN type. The UNKNOWN type has all properties, but we do not know whether they are declared or inferred.

        "(function() {" +
        "var goog = {};" +
        "/** @param {number} x */ goog.foo;" +
        "});");


    ObjectType goog = (ObjectType) findNameType("goog", lastLocalScope);
    assertTrue(goog.hasProperty("foo"));
    assertEquals("function (number): ?",
        goog.getPropertyType("foo").toString());
    assertTrue(goog.isPropertyTypeDeclared("foo"));


    Asserts.assertTypeEquals(lastLocalScope.getVar("goog.foo").getType(),
        goog.getPropertyType("foo"));
  }

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    testSame(
        "/** @constructor */ function f() { " +
        "  /** @type {number} */ this.foo = 3;" +
        "}" +
        "var x = new f();");
    ObjectType x = (ObjectType) findNameType("x", globalScope);
    assertEquals("f", x.toString());
    assertTrue(x.hasProperty("foo"));
    assertEquals("number", x.getPropertyType("foo").toString());
    assertFalse(x.isPropertyTypeInferred("foo"));
    assertTrue(x.isPropertyTypeDeclared("foo"));
  }

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        "/** @constructor \n * @extends {goog.Unknown} */" +
        "function Foo() {}" +
        "Foo.prototype = {bar: 1};" +
        "var x = new Foo();",
        RhinoErrorReporter.TYPE_PARSE_ERROR);
    ObjectType x = (ObjectType) findNameType("x", globalScope);
    assertEquals("Foo", x.toString());
    assertEquals("Foo.prototype", x.getImplicitPrototype().toString());
    assertTrue(x.getImplicitPrototype().hasOwnProperty("bar"));
    assertEquals("?", x.getPropertyType("bar").toString());
    assertTrue(x.isPropertyTypeInferred("bar"));
  }

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        "var y = Window.prototype;" +
        "Window.prototype.alert = function(message) {};" +
        "/** @constructor */ function Window() {}\n" +
        "var window = new Window(); \n" +
        "var x = window;");
    ObjectType x = (ObjectType) findNameType("x", globalScope);
    assertEquals("Window", x.toString());
    assertTrue(x.getImplicitPrototype().hasOwnProperty("alert"));
    assertEquals("function (this:Window, ?): undefined",
        x.getPropertyType("alert").toString());
    assertTrue(x.isPropertyTypeDeclared("alert"));


    ObjectType y = (ObjectType) findNameType("y", globalScope);
    assertEquals("function (this:Window, ?): undefined",
        y.getPropertyType("alert").toString());
  }

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        "var y = Window.prototype;" +
        "Window.prototype = {alert: function(message) {}};" +
        "/** @constructor */ function Window() {}\n" +
        "var window = new Window(); \n" +
        "var x = window;");
    ObjectType x = (ObjectType) findNameType("x", globalScope);
    assertEquals("Window", x.toString());
    assertTrue(x.getImplicitPrototype().hasOwnProperty("alert"));
    assertEquals("function (this:Window, ?): undefined",
        x.getPropertyType("alert").toString());
    assertFalse(x.isPropertyTypeDeclared("alert"));


    ObjectType y = (ObjectType) findNameType("y", globalScope);
    assertEquals("function (this:Window, ?): undefined",
        y.getPropertyType("alert").toString());
  }

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        "/** @constructor */function A() {}" +
        "A.prototype = {m1: 5, m2: true};" +
        "A.prototype.m3 = 'third property!';" +
        "var x = new A();");


    ObjectType instanceType = (ObjectType) findNameType("x", globalScope);
    assertEquals(
        getNativeObjectType(OBJECT_TYPE).getPropertiesCount() + 3,
        instanceType.getPropertiesCount());
    Asserts.assertTypeEquals(getNativeType(NUMBER_TYPE),
        instanceType.getPropertyType("m1"));
    Asserts.assertTypeEquals(getNativeType(BOOLEAN_TYPE),
        instanceType.getPropertyType("m2"));
    Asserts.assertTypeEquals(getNativeType(STRING_TYPE),
        instanceType.getPropertyType("m3"));


    // Verify the prototype chain.
    // This is a special case where we want the anonymous object to
    // become a prototype.
    assertFalse(instanceType.hasOwnProperty("m1"));
    assertFalse(instanceType.hasOwnProperty("m2"));
    assertFalse(instanceType.hasOwnProperty("m3"));


    ObjectType proto1 = instanceType.getImplicitPrototype();
    assertTrue(proto1.hasOwnProperty("m1"));
    assertTrue(proto1.hasOwnProperty("m2"));
    assertTrue(proto1.hasOwnProperty("m3"));


    ObjectType proto2 = proto1.getImplicitPrototype();
    assertFalse(proto2.hasProperty("m1"));
    assertFalse(proto2.hasProperty("m2"));
    assertFalse(proto2.hasProperty("m3"));
  }

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    Var i = globalScope.getVar("I");
    assertEquals("function (this:I): ?", i.getType().toString());
    assertTrue(i.getType().isInterface());


    ObjectType iPrototype = (ObjectType)
        ((ObjectType) i.getType()).getPropertyType("prototype");
    assertEquals("I.prototype", iPrototype.toString());
    assertTrue(iPrototype.isFunctionPrototypeType());


    assertEquals("number", iPrototype.getPropertyType("bar").toString());
    assertEquals("function (this:I): undefined",
        iPrototype.getPropertyType("baz").toString());


    Asserts.assertTypeEquals(iPrototype, globalScope.getVar("I.prototype").getType());
  }

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    Var i = globalScope.getVar("I");
    assertEquals("function (this:I): ?", i.getType().toString());
    assertTrue(i.getType().isInterface());


    ObjectType iPrototype = (ObjectType)
        ((ObjectType) i.getType()).getPropertyType("prototype");
    assertEquals("I.prototype", iPrototype.toString());
    assertTrue(iPrototype.isFunctionPrototypeType());


    assertEquals("number", iPrototype.getPropertyType("bar").toString());


    assertEquals("function (this:I): undefined",
        iPrototype.getPropertyType("baz").toString());


    assertEquals(iPrototype, globalScope.getVar("I.prototype").getType());
  }

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        "var e = new Extern(); e.baz;",
        "/** @constructor */ function Foo() {}" +
        "Foo.prototype.bar;" +
        "var f = new Foo(); f.baz;", null);


    ObjectType e = (ObjectType) globalScope.getVar("e").getType();
    assertEquals("?", e.getPropertyType("bar").toString());
    assertEquals("?", e.getPropertyType("baz").toString());


    ObjectType f = (ObjectType) globalScope.getVar("f").getType();
    assertEquals("?", f.getPropertyType("bar").toString());
    assertFalse(f.hasProperty("baz"));
  }

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        "", null);


    JSType e = globalScope.getVar("myExtern").getType();
    assertEquals("(Extern|null)", e.toString());


    ObjectType externType = (ObjectType) e.restrictByNotNullOrUndefined();
    assertTrue(globalScope.getRootNode().toStringTree(),
        externType.hasOwnProperty("foo"));
    assertTrue(externType.isPropertyTypeDeclared("foo"));
    assertEquals("number", externType.getPropertyType("foo").toString());
    assertTrue(externType.isPropertyInExterns("foo"));
  }

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