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Copy pathbindable-tests.ts
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1332 lines (1056 loc) · 46.7 KB
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import { Observable, fromObject, fromObjectRecursive } from "data/observable";
import { ViewBase } from "ui/core/view-base";
import { BindingOptions } from "ui/core/bindable";
import * as TKUnit from "../TKUnit";
import * as types from "utils/types";
import * as helper from "../ui/helper";
import * as utils from "utils/utils";
import * as bindingBuilder from "ui/builder/binding-builder";
import * as fs from "file-system";
import * as appModule from "application";
import * as trace from "trace";
import { View } from "ui/core/view";
import { Button } from "ui/button";
import { Page } from "ui/page";
import { StackLayout } from "ui/layouts/stack-layout";
import { Label } from "ui/label";
import { TextField } from "ui/text-field";
// <snippet module="ui/core/bindable" title="bindable">
// For information and examples how to use bindings please refer to special [**Data binding**](../../../../bindings.md) topic.
// </snippet>
// <snippet module="ui/core/weak-event-listener" title="weak-event-listener">
// For information and example how to use weak event listeners please refer to special [**Events**](../../../../events.md) topic which has a dedicated part about weak event listeners.
// </snippet>
export function test_Bindable_Members() {
const obj = new Label();
TKUnit.assert(types.isDefined(obj.bind), "Bindable.bind not defined");
TKUnit.assert(types.isDefined(obj.unbind), "Bindable.unbind not defined");
};
export function test_Bindable_Bind_ToTarget_OneWay() {
const model = new Observable();
model.set("name", "John");
const options: BindingOptions = {
sourceProperty: "name",
targetProperty: "text"
};
const obj = new Label();
obj.bind(options, model);
TKUnit.assert(obj.get("text") === "John", "Expected result after binding is [test value] === 'John'");
model.set("name", "Changed");
TKUnit.assert(obj.get("text") === "Changed", "Expected result after binding is [test value] === 'Changed'");
};
export function test_Bindable_Bind_ToTarget_TwoWay() {
const model = new Observable();
model.set("name", "John");
const options: BindingOptions = {
sourceProperty: "name",
targetProperty: "text",
twoWay: true
};
const obj = new Label();
obj.bind(options, model);
obj.set("text", "Changed");
TKUnit.assertEqual(model.get("name"), "Changed", "Two-way binding not updating the source when target is changed.");
model.set("name", "John");
TKUnit.assertEqual(obj.get("text"), "John", "Two-way binding not updating the target when source is changed.");
};
export function test_Bindable_Bind_ToBindingContext_OneWay() {
const model = new Observable();
model.set("name", "John");
const options: BindingOptions = {
sourceProperty: "name",
targetProperty: "text"
};
const obj = new Label();
obj.bind(options);
obj.set("text", "local");
obj.bindingContext = model;
TKUnit.assert(obj.get("text") === "John", "Binding to a context does not update the target property.");
};
export function test_Bindable_Bind_ToBindingContext_TwoWay() {
const model = new Observable();
model.set("name", "John");
const options: BindingOptions = {
sourceProperty: "name",
targetProperty: "text",
twoWay: true
};
const obj = new Label();
obj.bind(options);
obj.set("text", "local");
obj.bindingContext = model;
TKUnit.assertEqual(obj.get("text"), "John", "Binding to a context does not update the target property.");
obj.set("text", "local");
TKUnit.assertEqual(model.get("name"), "local", "Two-way binding to a context does not update the source property.");
};
export function test_Bindable_Unbind() {
const model = new Observable();
const options: BindingOptions = {
sourceProperty: "name",
targetProperty: "text"
};
const obj = new Label();
obj.bind(options, model);
model.set("name", "John");
TKUnit.assert(obj.get("text") === "John", "Binding does not updates target property.");
obj.unbind("text");
model.set("name", "Changed");
TKUnit.assert(obj.get("text") === "John", "Unbind does not remove binding.");
};
export function test_bind_NoSource_WillUse_BindingContext() {
const model = new Observable();
model.set("testProperty", "testValue");
const test = function (views: Array<View>) {
views[0].bindingContext = model;
views[1].bind({
sourceProperty: "testProperty",
targetProperty: "text"
});
const button = <Button>views[1];
TKUnit.assertEqual(button.text, model.get("testProperty"), "Bind method not working when no source is passed but a valid bindingContext is present.");
};
helper.do_PageTest_WithButton(test);
};
export function test_bindingContext_ValueSource_IsInherited() {
const test = function (views: Array<View>) {
const context = {};
views[0].bindingContext = context;
TKUnit.assert(views[1].bindingContext === context, "bindingContext not inherited.");
};
helper.do_PageTest_WithButton(test);
};
export function test_bindingContext_Change_IsReflected_Properly() {
const model = new Observable();
model.set("testProperty", "testValue");
const test = function (views: Array<View>) {
views[1].bind({
sourceProperty: "testProperty",
targetProperty: "text"
});
const button = <Button>views[1];
TKUnit.assert(button.text === "", "Bind should do nothing when no source and binding context are available.");
views[0].bindingContext = model;
TKUnit.assert(button.text === "testValue", "Binding not updated properly when a valid bindingContext is provided.");
views[0].bindingContext = undefined;
model.set("testProperty", "updatedValue");
TKUnit.assertEqual(button.text, "", "Binding not properly detached when bindingContext is cleared.");
};
helper.do_PageTest_WithButton(test);
};
export function test_WhenBindingIsSetToAnElement_AndElementIsRemoved_ShouldBeCollectedByGC(done) {
let testFinished = false;
let page = helper.getCurrentPage();
let stack = new StackLayout();
let expectedValue = "testValue";
let sourcePropertyName = "testProperty";
let targetPropertyName = "text";
stack.on(View.loadedEvent, () => {
const model = new Observable();
model.set(sourcePropertyName, expectedValue);
function createButton(bindContext) {
let button = new Button();
button.bind({
sourceProperty: sourcePropertyName,
targetProperty: targetPropertyName
}, bindContext);
return new WeakRef(button);
}
const weakRef = createButton(model);
try {
stack.addChild(weakRef.get());
TKUnit.assertEqual(weakRef.get().text, expectedValue, "Binding is not working properly!");
stack.removeChild(weakRef.get());
TKUnit.waitUntilReady(() => { return !weakRef.get().isLoaded; });
utils.GC();
TKUnit.assert(!weakRef.get(), "UIElement is still alive!");
testFinished = true;
}
catch (e) {
done(e);
}
});
page.content = stack;
TKUnit.waitUntilReady(() => { return testFinished; });
done(null);
}
export function test_OneBindableToBindMoreThanOneProperty_ToSameSource() {
const model = new Observable();
const firstPropertyOptions: BindingOptions = {
sourceProperty: "name",
targetProperty: "text"
};
const secondPropertyOptions: BindingOptions = {
sourceProperty: "sourceProperty",
targetProperty: "targetProperty"
};
const obj = new Label();
obj.bind(firstPropertyOptions, model);
obj.bind(secondPropertyOptions, model);
model.set("name", "John");
model.set("sourceProperty", "testValue");
TKUnit.assertEqual(obj.get("text"), "John", "Binding does not updates target property.");
TKUnit.assertEqual(obj.get("targetProperty"), "testValue", "Binding does not updates target property1.");
}
export function test_MoreThanOneBindables_BindToASameSourceAndProperty() {
const model = new Observable();
const bindingOptions: BindingOptions = {
sourceProperty: "sourceProperty",
targetProperty: "targetProperty"
};
const obj1 = new Label();
obj1.bind(bindingOptions, model);
const obj2 = new Label();
obj2.bind(bindingOptions, model);
model.set("sourceProperty", "testValue");
TKUnit.assertEqual(obj1.get("targetProperty"), "testValue", "Binding does not updates target property for first object.");
TKUnit.assertEqual(obj2.get("targetProperty"), "testValue", "Binding does not updates target property for second object.");
};
class TestClass extends ViewBase {
private _value: string;
get value(): string {
return this._value;
}
set value(v: string) {
if (v === "invalid") {
throw new Error("Trying to set invalid value.");
}
this._value = v;
}
};
export function test_WhenBindingSetsInvalidValue_NoExceptionIsThrown() {
const model = new Observable();
const options: BindingOptions = {
sourceProperty: "value",
targetProperty: "value"
};
const obj = new TestClass();
obj.bind(options, model);
model.set("value", "valid");
TKUnit.assert(obj.get("value") === "valid");
// Try set invalid value - no exception should be thrown and the value should remain the same.
model.set("value", "invalid");
TKUnit.assert(obj.get("value") === "valid");
}
export function test_binding_bindingContext_setRootContextFirst() {
const test = function (views: Array<View>) {
const rootContext = new Observable();
rootContext.set("selectedItem", "item 1");
views[0].bindingContext = rootContext;
const stack = <StackLayout>views[1];
const options: BindingOptions = {
sourceProperty: "selectedItem",
targetProperty: "bindingContext"
};
stack.bind(options);
TKUnit.assertEqual(stack.bindingContext, "item 1", "Initial binding value");
TKUnit.assertEqual(views[2].bindingContext, "item 1", "Initial binding value");
rootContext.set("selectedItem", "item 2");
TKUnit.assertEqual(stack.bindingContext, "item 2", "Changed binding value");
TKUnit.assertEqual(views[2].bindingContext, "item 2", "Changed binding value");
};
helper.do_PageTest_WithStackLayout_AndButton(test);
};
export function test_binding_bindingContext_setBindingFirst() {
const test = function (views: Array<View>) {
const rootContext = new Observable();
rootContext.set("selectedItem", "item 1");
const stack = <StackLayout>views[1];
const options: BindingOptions = {
twoWay: true,
sourceProperty: "selectedItem",
targetProperty: "bindingContext"
};
stack.bind(options);
views[0].bindingContext = rootContext;
TKUnit.assertEqual(stack.bindingContext, "item 1", "Initial binding value");
TKUnit.assertEqual(views[2].bindingContext, "item 1", "Initial binding value");
rootContext.set("selectedItem", "item 2");
TKUnit.assertEqual(stack.bindingContext, "item 2", "Changed binding value");
TKUnit.assertEqual(views[2].bindingContext, "item 2", "Changed binding value");
};
helper.do_PageTest_WithStackLayout_AndButton(test);
};
export function test_Bindable_BindingContext_Number_DoesNotThrow() {
const obj = new Label();
obj.bindingContext = 42;
};
export function test_Bindable_BindingContext_Boolean_DoesNotThrow() {
const obj = new Label();
obj.bindingContext = true;
};
export function test_Bindable_BindingContext_String_DoesNotThrow() {
const options: BindingOptions = {
sourceProperty: "length",
targetProperty: "text"
};
const obj = new Label();
obj.bind(options);
obj.set("text", "local");
obj.bindingContext = "string";
TKUnit.assert(obj.get("text") === 6, "Expected: 6; Actual: " + obj.get("text"));
};
export function test_getBindableOptionsFromStringFullFormat() {
const bindingExpression = "bindProperty, bindProperty * 2, false";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assert(bindOptions.sourceProperty === "bindProperty", "Expected: bindProperty, Actual: " + bindOptions.sourceProperty);
TKUnit.assert(bindOptions.targetProperty === "targetBindProperty", "Expected: targetBindProperty, Actual: " + bindOptions.targetProperty);
TKUnit.assert(bindOptions.expression === "bindProperty * 2", "Expected: bindProperty * 2, Actual:" + bindOptions.expression);
TKUnit.assert(bindOptions.twoWay === false, "Expected: false, Actual: " + bindOptions.twoWay);
};
export function test_getBindableOptionsFromStringShortFormatExpression() {
const bindingExpression = "bindProperty * 2";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assert(bindOptions.sourceProperty === "$value", "Expected: bindProperty, Actual: " + bindOptions.sourceProperty);
TKUnit.assert(bindOptions.targetProperty === "targetBindProperty", "Expected: targetBindProperty, Actual: " + bindOptions.targetProperty);
TKUnit.assert(bindOptions.expression === "bindProperty * 2", "Expected: bindProperty * 2, Actual: " + bindOptions.expression);
TKUnit.assert(bindOptions.twoWay === true, "Expected: true, Actual: " + bindOptions.twoWay);
};
export function test_getBindableOptionsFromStringShortFormatProperty() {
const bindingExpression = "bindProperty";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assert(bindOptions.sourceProperty === "bindProperty", "Expected: bindProperty, Actual: " + bindOptions.sourceProperty);
TKUnit.assert(bindOptions.targetProperty === "targetBindProperty", "Expected: targetBindProperty, Actual: " + bindOptions.targetProperty);
TKUnit.assert(bindOptions.expression === undefined, "Expected: null, Actual: " + bindOptions.expression);
TKUnit.assert(bindOptions.twoWay === true, "Expected: true, Actual: " + bindOptions.twoWay);
};
export function test_getBindableOptionsFromStringTwoParamsFormat() {
const bindingExpression = "bindProperty, bindProperty * 2";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assert(bindOptions.sourceProperty === "bindProperty", "Expected: bindProperty, Actual: " + bindOptions.sourceProperty);
TKUnit.assert(bindOptions.targetProperty === "targetBindProperty", "Expected: targetBindProperty, Actual: " + bindOptions.targetProperty);
TKUnit.assert(bindOptions.expression === "bindProperty * 2", "Expected: bindProperty * 2, Actual:" + bindOptions.expression);
TKUnit.assert(bindOptions.twoWay === true, "Expected: true, Actual: " + bindOptions.twoWay);
};
export function test_getBindableOptionsFromStringFullNamedFormat() {
const bindingExpression = "bindProperty, expression = bindProperty * 2, twoWay = false";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assert(bindOptions.sourceProperty === "bindProperty", "Expected: bindProperty, Actual: " + bindOptions.sourceProperty);
TKUnit.assert(bindOptions.targetProperty === "targetBindProperty", "Expected: targetBindProperty, Actual: " + bindOptions.targetProperty);
TKUnit.assert(bindOptions.expression === "bindProperty * 2", "Expected: bindProperty * 2, Actual:" + bindOptions.expression);
TKUnit.assert(bindOptions.twoWay === false, "Expected: false, Actual: " + bindOptions.twoWay);
};
export function test_getBindableOptionsFromStringShortNamedFormatExpression() {
const bindingExpression = "sourceProperty = bindProperty, expression = bindProperty * 2";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assert(bindOptions.sourceProperty === "bindProperty", "Expected: bindProperty, Actual: " + bindOptions.sourceProperty);
TKUnit.assert(bindOptions.targetProperty === "targetBindProperty", "Expected: targetBindProperty, Actual: " + bindOptions.targetProperty);
TKUnit.assert(bindOptions.expression === "bindProperty * 2", "Expected: bindProperty * 2, Actual: " + bindOptions.expression);
TKUnit.assert(bindOptions.twoWay === true, "Expected: true, Actual: " + bindOptions.twoWay);
};
export function test_getBindableOptionsFromStringShortNamedFormatProperty() {
const bindingExpression = "sourceProperty = bindProperty";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assert(bindOptions.sourceProperty === "bindProperty", "Expected: bindProperty, Actual: " + bindOptions.sourceProperty);
TKUnit.assert(bindOptions.targetProperty === "targetBindProperty", "Expected: targetBindProperty, Actual: " + bindOptions.targetProperty);
TKUnit.assert(bindOptions.expression === undefined, "Expected: null, Actual: " + bindOptions.expression);
TKUnit.assert(bindOptions.twoWay === true, "Expected: true, Actual: " + bindOptions.twoWay);
};
export function test_getBindableOptionsFromStringTwoParamsNamedFormat() {
const bindingExpression = "bindProperty, expression = bindProperty * 2";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assert(bindOptions.sourceProperty === "bindProperty", "Expected: bindProperty, Actual: " + bindOptions.sourceProperty);
TKUnit.assert(bindOptions.targetProperty === "targetBindProperty", "Expected: targetBindProperty, Actual: " + bindOptions.targetProperty);
TKUnit.assert(bindOptions.expression === "bindProperty * 2", "Expected: bindProperty * 2, Actual:" + bindOptions.expression);
TKUnit.assert(bindOptions.twoWay === true, "Expected: true, Actual: " + bindOptions.twoWay);
};
export function test_getBindingOptionsFromStringWithFunctionWitnMoreParams() {
const bindingExpression = "bindProperty, converter(bindProperty, param1)";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assertEqual(bindOptions.sourceProperty, "bindProperty");
TKUnit.assertEqual(bindOptions.targetProperty, "targetBindProperty");
TKUnit.assertEqual(bindOptions.expression, "converter(bindProperty, param1)");
TKUnit.assertEqual(bindOptions.twoWay, true);
};
export function test_getBindingOptionsFromStringWithFunctionArrayParams() {
const bindingExpression = "bindProperty, converter(bindProperty, [param1, param2])";
const bindOptions = bindingBuilder.getBindingOptions("targetBindProperty", bindingExpression);
TKUnit.assertEqual(bindOptions.sourceProperty, "bindProperty");
TKUnit.assertEqual(bindOptions.targetProperty, "targetBindProperty");
TKUnit.assertEqual(bindOptions.expression, "converter(bindProperty, [param1, param2])");
TKUnit.assertEqual(bindOptions.twoWay, true);
};
export function test_bindingToNestedPropertyWithValueSyntax() {
const bindingSource = new Observable();
bindingSource.set("testProperty", "testValue");
const testElement = new Label();
testElement.bind({
sourceProperty: "$value.testProperty",
targetProperty: "targetPropertyName"
}, bindingSource);
TKUnit.assertEqual(testElement.get("targetPropertyName"), "testValue");
TKUnit.assertTrue(bindingSource['$value'] === undefined, "We should not add $value to bindingSource.");
};
export function test_TwoElementsBindingToSameBindingContext() {
const testFunc = function (page: Page) {
const upperStackLabel = <Label>(page.getViewById("upperStackLabel"));
const label1 = <Label>(page.getViewById("label1"));
const label2 = <Label>(page.getViewById("label2"));
TKUnit.assertEqual(upperStackLabel.text, label1.text, "label1");
TKUnit.assertEqual(upperStackLabel.text, label2.text, "label2");
};
const moduleName = __dirname.substr(fs.knownFolders.currentApp().path.length);
helper.navigateToModuleAndRunTest(("." + moduleName + "/bindingContext_testPage"), null, testFunc);
};
export function test_BindingContext_NavigatingForwardAndBack() {
const expectedValue = "Tralala";
const testFunc = function (page: Page) {
const innerTestFunc = function (childPage: Page) {
const testTextField: TextField = <TextField>(childPage.getViewById("testTextField"));
testTextField.text = expectedValue;
};
const moduleName = __dirname.substr(fs.knownFolders.currentApp().path.length);
helper.navigateToModuleAndRunTest(("." + moduleName + "/bindingContext_testPage2"), page.bindingContext, innerTestFunc);
const testLabel: Label = <Label>(page.getViewById("testLabel"));
TKUnit.assertEqual(testLabel.text, expectedValue);
};
const moduleName = __dirname.substr(fs.knownFolders.currentApp().path.length);
helper.navigateToModuleAndRunTest(("." + moduleName + "/bindingContext_testPage1"), null, testFunc);
};
export function test_BindingToSource_FailsAfterBindingContextChange() {
const createLabel = function () {
const label = new Label();
return label;
};
const labelViewModel = new Observable();
const expectedValue = "testValue";
labelViewModel.set("testProperty", expectedValue);
const testFunc = function (views: Array<View>) {
const testLabel = <Label>(views[0]);
testLabel.bind({ sourceProperty: "testProperty", targetProperty: "text" }, labelViewModel);
const page = <Page>(views[1]);
page.bindingContext = new Observable;
TKUnit.assertEqual(testLabel.text, expectedValue);
};
helper.buildUIAndRunTest(createLabel(), testFunc);
};
export function test_BindingToParentView_ShouldNotLeaveGarbageInViewModel() {
const createStack = function () {
const stack = new StackLayout();
const label = new Label();
stack.addChild(label);
return stack;
};
const stackViewModel = new Observable();
const expectedValue = "testValue";
stackViewModel.set("testProperty", expectedValue);
const testFunc = function (views: Array<View>) {
let testStack = <StackLayout>(views[0]);
testStack.bindingContext = stackViewModel;
let testLabel = <Label>(testStack.getChildAt(0));
testLabel.bind({ sourceProperty: "$parent.testProperty", targetProperty: "text", expression: "$parent.testProperty" });
TKUnit.assertEqual(testLabel.text, expectedValue);
TKUnit.assertTrue(stackViewModel['$parent'] === undefined, "stackViewModel['$parent'] should be removed from parent binding context.");
TKUnit.assertTrue(testLabel.bindingContext['$parent'] === undefined, "testLabel.bindingContext['$parent'] should be removed from parent binding context.");
};
helper.buildUIAndRunTest(createStack(), testFunc);
};
export function test_BindingToParentsView_ShouldNotLeaveGarbageInViewModel() {
const createStack = function () {
const stack = new StackLayout();
const label = new Label();
stack.addChild(label);
return stack;
};
const stackViewModel = new Observable();
const expectedValue = "testValue";
stackViewModel.set("testProperty", expectedValue);
const testFunc = function (views: Array<View>) {
let testStack = <StackLayout>(views[0]);
testStack.bindingContext = stackViewModel;
let testLabel = <Label>(testStack.getChildAt(0));
testLabel.bind({ sourceProperty: "$parents['StackLayout'].testProperty", targetProperty: "text", expression: "$parents['StackLayout'].testProperty" });
TKUnit.assertEqual(testLabel.text, expectedValue);
TKUnit.assertTrue(stackViewModel['$parent'] === undefined, "stackViewModel['$parent'] should be removed from parent binding context.");
TKUnit.assertTrue(testLabel.bindingContext['$parents'] === undefined, "testLabel.bindingContext['$parents'] should be removed from parent binding context.");
};
helper.buildUIAndRunTest(createStack(), testFunc);
};
export function test_BindingToDictionaryAtAppLevel() {
const createLabel = function () {
const label = new Label();
return label;
};
const pageViewModel = new Observable();
const testPropertyName = "testValue";
const expectedValue = "expectedValue";
pageViewModel.set("testProperty", testPropertyName);
const dict = {};
dict[testPropertyName] = expectedValue;
appModule.resources["dict"] = dict;
const testFunc = function (views: Array<View>) {
const testLabel = <Label>(views[0]);
testLabel.bind({ sourceProperty: "testProperty", targetProperty: "text", expression: "dict[testProperty]" });
const page = <Page>(views[1]);
page.bindingContext = pageViewModel;
TKUnit.assertEqual(testLabel.text, expectedValue);
TKUnit.assertTrue(testLabel.bindingContext["dict"] === undefined, "BindingContext should not contain properties from application resources.");
};
helper.buildUIAndRunTest(createLabel(), testFunc);
}
export function test_BindingConverterCalledEvenWithNullValue() {
const createLabel = function () {
const label = new Label();
return label;
};
const pageViewModel = new Observable();
const testPropertyValue = null;
const expectedValue = "collapsed";
pageViewModel.set("testProperty", testPropertyValue);
appModule.resources["converter"] = function (value) {
if (value) {
return "visible";
} else {
return "collapsed";
}
};
const testFunc = function (views: Array<View>) {
const testLabel = <Label>(views[0]);
testLabel.bind({ sourceProperty: "testProperty", targetProperty: "text", expression: "testProperty | converter" });
const page = <Page>(views[1]);
page.bindingContext = pageViewModel;
TKUnit.assertEqual(testLabel.text, expectedValue);
};
helper.buildUIAndRunTest(createLabel(), testFunc);
}
export function test_UpdatingNestedPropertyViaBinding() {
const expectedValue1 = "Alabala";
const expectedValue2 = "Tralala";
const viewModel = new Observable();
const parentViewModel = new Observable();
viewModel.set("parentView", parentViewModel);
parentViewModel.set("name", expectedValue1);
const testElement = new Label();
testElement.bind({
sourceProperty: "parentView.name",
targetProperty: "text",
twoWay: true
}, viewModel);
const testElement2 = new Label();
testElement2.bind({
sourceProperty: "parentView.name",
targetProperty: "text",
twoWay: true
}, viewModel);
TKUnit.assertEqual(testElement.get("text"), expectedValue1);
testElement.set("text", expectedValue2);
TKUnit.assertEqual(parentViewModel.get("name"), expectedValue2);
TKUnit.assertEqual(testElement2.get("text"), expectedValue2);
}
class Person extends Observable {
private _firstName: string;
private _lastName: string;
public get FirstName(): string {
return this._firstName;
}
public set FirstName(value: string) {
if (this._firstName !== value) {
this._firstName = value;
this.notifyPropertyChange("FirstName", value);
}
}
public get LastName(): string {
return this._lastName;
}
public set LastName(value: string) {
if (this._lastName !== value) {
this._lastName = value;
this.notifyPropertyChange("LastName", value);
}
}
}
class Activity extends Observable {
private _text: string;
private _owner: Person;
public get Text(): string {
return this._text;
}
public set Text(value: string) {
if (this._text !== value) {
this._text = value;
this.notifyPropertyChange("Text", value);
}
}
public get Owner(): Person {
return this._owner;
}
public set Owner(value: Person) {
if (this._owner !== value) {
this._owner = value;
this.notifyPropertyChange("Owner", value);
}
}
constructor(text: string, firstName: string, lastName: string) {
super();
this._text = text;
const owner = new Person();
owner.FirstName = firstName;
owner.LastName = lastName;
this.Owner = owner;
}
}
export function test_NestedPropertiesBinding() {
const expectedValue = "Default Text";
const viewModel = new Observable();
viewModel.set("activity", new Activity(expectedValue, "Default First Name", "Default Last Name"));
const target1 = new Label();
target1.bind({
sourceProperty: "activity.Text",
targetProperty: "targetProperty",
twoWay: true
}, viewModel);
TKUnit.assertEqual(target1.get("targetProperty"), expectedValue);
const newExpectedValue = "Alabala";
const act = new Activity(newExpectedValue, "Default First Name", "Default Last Name");
viewModel.set("activity", act);
TKUnit.assertEqual(target1.get("targetProperty"), newExpectedValue);
}
export function test_WrongNestedPropertiesBinding() {
const expectedValue = "Default Text";
const viewModel = new Observable();
viewModel.set("activity", new Activity(expectedValue, "Default First Name", "Default Last Name"));
let errorMessage;
let traceWriter = {
write: function (message, category, type?) {
errorMessage = message;
}
};
trace.addWriter(traceWriter);
const target1 = new Label();
target1.bind({
sourceProperty: "activity.",
targetProperty: "targetProperty",
twoWay: true
}, viewModel);
TKUnit.assertNotEqual(errorMessage, undefined);
trace.removeWriter(traceWriter);
}
export function test_NestedPropertiesBindingTwoTargets() {
const expectedText = "Default Text";
const expectedFirstName = "Default First Name";
const expectedLastName = "Default Last Name";
const viewModel = new Observable();
viewModel.set("activity", new Activity(expectedText, expectedFirstName, expectedLastName));
const target1 = new Label();
target1.bind({
sourceProperty: "activity.Text",
targetProperty: "targetProperty",
twoWay: true
}, viewModel);
const target2 = new Label();
target2.bind({
sourceProperty: "activity.Owner.FirstName",
targetProperty: "targetProp",
twoWay: true
}, viewModel);
TKUnit.assertEqual(target1.get("targetProperty"), expectedText);
TKUnit.assertEqual(target2.get("targetProp"), expectedFirstName);
const newExpectedText = "Alabala";
const newExpectedFirstName = "First Tralala";
const newExpectedLastName = "Last Tralala";
const act = new Activity(newExpectedText, newExpectedFirstName, newExpectedLastName);
viewModel.set("activity", act);
TKUnit.assertEqual(target1.get("targetProperty"), newExpectedText);
TKUnit.assertEqual(target2.get("targetProp"), newExpectedFirstName);
}
export function test_NestedPropertiesBindingTwoTargetsAndSecondChange() {
const expectedText = "Default Text";
const expectedFirstName = "Default First Name";
const expectedLastName = "Default Last Name";
const viewModel = new Observable();
viewModel.set("activity", new Activity(expectedText, expectedFirstName, expectedLastName));
const target1 = new Label();
target1.bind({
sourceProperty: "activity.Text",
targetProperty: "targetProperty",
twoWay: true
}, viewModel);
const target2 = new Label();
target2.bind({
sourceProperty: "activity.Owner.FirstName",
targetProperty: "targetProp",
twoWay: true
}, viewModel);
TKUnit.assertEqual(target1.get("targetProperty"), expectedText);
TKUnit.assertEqual(target2.get("targetProp"), expectedFirstName);
const newExpectedText = "Alabala";
const newExpectedFirstName = "First Tralala";
const newExpectedLastName = "Last Tralala";
const act = new Activity(newExpectedText, newExpectedFirstName, newExpectedLastName);
viewModel.set("activity", act);
TKUnit.assertEqual(target1.get("targetProperty"), newExpectedText);
TKUnit.assertEqual(target2.get("targetProp"), newExpectedFirstName);
const secondExpectedText = "Second expected text";
const secondExpectedFirstName = "Second expected first name";
const secondExpectedLastName = "Second expected last name";
const act1 = new Activity(secondExpectedText, secondExpectedFirstName, secondExpectedLastName);
viewModel.set("activity", act1);
TKUnit.assertEqual(target1.get("targetProperty"), secondExpectedText);
TKUnit.assertEqual(target2.get("targetProp"), secondExpectedFirstName);
}
export function test_NestedPropertiesBindingTwoTargetsAndRegularChange() {
const expectedText = "Default Text";
const expectedFirstName = "Default First Name";
const expectedLastName = "Default Last Name";
const viewModel = new Observable();
viewModel.set("activity", new Activity(expectedText, expectedFirstName, expectedLastName));
const target1 = new Label();
target1.bind({
sourceProperty: "activity.Text",
targetProperty: "targetProperty",
twoWay: true
}, viewModel);
const target2 = new Label();
target2.bind({
sourceProperty: "activity.Owner.FirstName",
targetProperty: "targetProp",
twoWay: true
}, viewModel);
TKUnit.assertEqual(target1.get("targetProperty"), expectedText);
TKUnit.assertEqual(target2.get("targetProp"), expectedFirstName);
const newExpectedText = "Alabala";
const newExpectedFirstName = "First Tralala";
const newExpectedLastName = "Last Tralala";
const act = new Activity(newExpectedText, newExpectedFirstName, newExpectedLastName);
viewModel.set("activity", act);
TKUnit.assertEqual(target1.get("targetProperty"), newExpectedText);
TKUnit.assertEqual(target2.get("targetProp"), newExpectedFirstName);
const newAct = viewModel.get("activity");
const secondExpectedText = "Second expected text";
newAct.Text = secondExpectedText;
const secondExpectedFirstName = "Second expected First Name";
newAct.Owner.FirstName = secondExpectedFirstName;
TKUnit.assertEqual(target1.get("targetProperty"), secondExpectedText);
TKUnit.assertEqual(target2.get("targetProp"), secondExpectedFirstName);
}
export function test_NestedPropertiesBindingTwoTargetsAndReplacingSomeNestedObject() {
const expectedText = "Default Text";
const expectedFirstName = "Default First Name";
const expectedLastName = "Default Last Name";
const viewModel = new Observable();
viewModel.set("activity", new Activity(expectedText, expectedFirstName, expectedLastName));
const target1 = new Label();
target1.bind({
sourceProperty: "activity.Text",
targetProperty: "targetProperty",
twoWay: true
}, viewModel);
const target2 = new Label();
target2.bind({
sourceProperty: "activity.Owner.FirstName",
targetProperty: "targetProp",
twoWay: true
}, viewModel);
TKUnit.assertEqual(target1.get("targetProperty"), expectedText);
TKUnit.assertEqual(target2.get("targetProp"), expectedFirstName);
const newExpectedText = "Alabala";
const newExpectedFirstName = "First Tralala";
const newExpectedLastName = "Last Tralala";
const act = new Activity(newExpectedText, newExpectedFirstName, newExpectedLastName);
viewModel.set("activity", act);
TKUnit.assertEqual(target1.get("targetProperty"), newExpectedText);
TKUnit.assertEqual(target2.get("targetProp"), newExpectedFirstName);
const secondExpectedFirstName = "Second expected first name";
const newPerson = new Person();
newPerson.FirstName = secondExpectedFirstName;
newPerson.LastName = "Last Name";
const act1 = viewModel.get("activity");
(<Activity>act1).Owner = newPerson;
TKUnit.assertEqual(target2.get("targetProp"), secondExpectedFirstName);
}
export function test_NullSourcePropertyShouldNotCrash() {
const expectedValue = "Expected Value";
const target = new Label();
const convFunc = function (value) {
return value + "Converted";
};
const model = new Observable();
model.set("field", expectedValue);
model.set("convFunc", convFunc);
target.bind({
sourceProperty: null,
targetProperty: "targetProp",
expression: "convFunc(field)"
}, model);
TKUnit.assertEqual(target.get("targetProp"), convFunc(expectedValue));
}
export function test_BindingContextOfAChildElementIsNotOverwrittenBySettingTheBindingContextOfPage() {
let testFinished = false;
let page = helper.getCurrentPage();
let child = new StackLayout();
let childModel = new Observable();
child.bindingContext = childModel;
TKUnit.assertEqual(child.bindingContext, childModel);
child.on(StackLayout.loadedEvent, (args) => {
TKUnit.assertEqual(child.bindingContext, childModel);
page.bindingContext = new Observable();
TKUnit.assertEqual(child.bindingContext, childModel);
child.off(StackLayout.loadedEvent);
testFinished = true;
});