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.

        "", 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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        "", null);


    JSType e = globalScope.getVar("Extern").getType();
    assertEquals("function (new:Extern): ?", e.toString());


    ObjectType externProto = ((FunctionType) e).getPrototype();
    assertTrue(globalScope.getRootNode().toStringTree(),
        externProto.hasOwnProperty("foo"));
    assertTrue(externProto.isPropertyTypeInferred("foo"));
    assertEquals("?", externProto.getPropertyType("foo").toString());
    assertTrue(externProto.isPropertyInExterns("foo"));
  }

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        "/** @constructor */ function Normal() {}" +
        "/** @type {Normal} */ var normal;" +
        "/** @return {number} */ normal.one;", null);


    JSType e = globalScope.getVar("Extern").getType();
    ObjectType externInstance = ((FunctionType) e).getInstanceType();
    assertTrue(externInstance.hasOwnProperty("one"));
    assertTrue(externInstance.isPropertyTypeDeclared("one"));
    assertEquals("function (): number",
        externInstance.getPropertyType("one").toString());


    JSType n = globalScope.getVar("Normal").getType();
    ObjectType normalInstance = ((FunctionType) n).getInstanceType();
    assertFalse(normalInstance.hasOwnProperty("one"));
  }

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    testSame(
        "/** @constructor \n * @param {*=} x @return {!Object} */"
        + "function Object(x) {}" +
        "/** @type {number} */ Object.one;", "", null);


    ObjectType obj = globalScope.getVar("Object").getType().dereference();
    assertTrue(obj.hasOwnProperty("one"));
    assertEquals("number", obj.getPropertyType("one").toString());
  }

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        "/** @constructor \n * @param {*} var_args */ " +
        "function Function(var_args) {}" +
        "/** @type {!Function} */ Function.prototype.apply;",
        "var f = new Function();", null);


    ObjectType f = (ObjectType) globalScope.getVar("f").getType();


    // The type of apply() on a function instance is resolved dynamically,
    // since apply varies with the type of the function it's called on.
    assertEquals(
        "function (?=, (Object|null)=): ?",
        f.getPropertyType("apply").toString());


    // The type of apply() on the function prototype just takes what it was
    // declared with.
    FunctionType func = (FunctionType) globalScope.getVar("Function").getType();
    assertEquals("Function",

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        "/** @type {!Object} */ var a = {};" +
        "/** @type {number} */ a.name = 0;");


    assertEquals("number", globalScope.getVar("a.name").getType().toString());


    ObjectType a = (ObjectType) (globalScope.getVar("a").getType());
    assertFalse(a.hasProperty("name"));
    assertFalse(getNativeObjectType(OBJECT_TYPE).hasProperty("name"));
  }

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        "/** @type {{foo: number}} */ var a = {foo: 3};" +
        "/** @type {number} */ a.name = 0;");


    assertEquals("number", globalScope.getVar("a.name").getType().toString());


    ObjectType a = (ObjectType) (globalScope.getVar("a").getType());
    assertEquals("{foo: number}", a.toString());
    assertFalse(a.hasProperty("name"));
  }

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    testSame(
        "/** @constructor */ function Window() {}" +
        "Window.prototype.alert = function() {};" +
        "var x = this;");


    ObjectType x = (ObjectType) (globalScope.getVar("x").getType());
    FunctionType windowCtor =
        (FunctionType) (globalScope.getVar("Window").getType());
    assertEquals("global this", x.toString());
    assertTrue(x.isSubtype(windowCtor.getInstanceType()));
    assertFalse(x.isEquivalentTo(windowCtor.getInstanceType()));
    assertTrue(x.hasProperty("alert"));
  }

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    testSame(
        "/** @constructor */ function Window() {}" +
        "Window.prototype = {alert: function() {}};" +
        "var x = this;");


    ObjectType x = (ObjectType) (globalScope.getVar("x").getType());
    FunctionType windowCtor =
        (FunctionType) (globalScope.getVar("Window").getType());
    assertEquals("global this", x.toString());
    assertTrue(x.isSubtype(windowCtor.getInstanceType()));
    assertFalse(x.isEquivalentTo(windowCtor.getInstanceType()));
    assertTrue(x.hasProperty("alert"));
  }

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  }


  public void testConstructorNode() {
    testSame("var goog = {}; /** @constructor */ goog.Foo = function() {};");


    ObjectType ctor = (ObjectType) (findNameType("goog.Foo", globalScope));
    assertNotNull(ctor);
    assertTrue(ctor.isConstructor());
    assertEquals("function (new:goog.Foo): undefined", ctor.toString());
  }

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