How to use the @nativescript/core/ui/label.Label function in @nativescript/core

export function test_inspector_ui_setAttributeAsText_set_existing_property() {
    // Arrange
    const label = new Label();

    label.text = "original label";
    const expectedValue = "updated label";

    label.ensureDomNode();

    // Act
    // simulate call from the inspector UI
    currentInspector.setAttributeAsText(label.domNode.nodeId, "text='" + expectedValue + "'", "text");

    // Assert
    assertEqual(label.text, expectedValue);
}

export function test_inspector_ui_setAttributeAsText_set_new_property() {
    // Arrange
    const label = new Label();
    const expectedValue = "custom";

    label.ensureDomNode();

    // Act
    // simulate call from the inspector UI
    currentInspector.setAttributeAsText(label.domNode.nodeId, "data-attr='" + expectedValue + "'" /* data-attr="custom" */, " " /* empty attr name initially */);

    // Assert
    assertEqual(label["data-attr"], expectedValue);
}

export function test_inspector_ui_setAttributeAsText_remove_existing_property() {
    // Arrange
    const label = new Label();
    label.text = "original label";

    label.ensureDomNode();

    // Act
    // simulate call from the inspector UI
    currentInspector.setAttributeAsText(label.domNode.nodeId, "" /* empty value - removes the attribute */, "text");

    // Assert
    assertEqual(label.text, "");
}

function createNumericPropertyUI(desc: NumericProeprtyDescriptor) {
        var lbl = new labels.Label();
        lbl.text = desc.name;
        lbl.horizontalAlignment = "left";
        stack.addChild(lbl);

        var slider = new sliders.Slider();
        slider.minValue = desc.min;
        slider.maxValue = desc.max;
        slider.value = desc.value;
        stack.addChild(slider);

        var options: bindable.BindingOptions = {
            sourceProperty: "value",
            targetProperty: desc.name,
        };
        control.bind(options, slider);
    }

grid.addColumn(new ItemSpec(1, "star"));
    grid.addRow(new ItemSpec(1, "auto"));
    grid.addRow(new ItemSpec(1, "auto"));

    var defaultImageSource = ImageSource.fromFileSync(__dirname + "/test.png");

    var img = new Image();
    img.src = defaultImageSource;

    img.width = 80;
    img.height = 80;
    img.verticalAlignment = "bottom";
    GridLayout.setRowSpan(img, 2);
    grid.addChild(img);

    var titleLabel = new Label();
    titleLabel.textWrap = true;
    titleLabel.text = "some text goes here";
    GridLayout.setColumn(titleLabel, 1);
    grid.addChild(titleLabel);

    var commentsLabel = new Label();
    commentsLabel.text = "comments";
    commentsLabel.verticalAlignment = "bottom";
    GridLayout.setRow(commentsLabel, 1);
    GridLayout.setColumn(commentsLabel, 1);
    grid.addChild(commentsLabel);

    var page = new Page();
    page.content = stack;
    page.css = "GridLayout { background-color: yellow } image { background-color: green } label { background-color: red } stackpnael { background-color: pink }";

export function test_inspector_ui_removeNode() {
    let childNodeRemovedCalled = false;
    let stack = new StackLayout();
    let label = new Label();
    stack.addChild(label);

    stack.ensureDomNode();
    label.ensureDomNode();

    let expectedParentId = stack.domNode.nodeId;
    let expectedNodeId = label.domNode.nodeId;

    currentInspector.childNodeRemoved = (parentId, nodeId) => {
        childNodeRemovedCalled = true;
        assertEqual(parentId, expectedParentId);
        assertEqual(nodeId, expectedNodeId);
    };

    currentInspector.removeNode(label.domNode.nodeId);

function createBooleanPropertyUI(desc: BoolPropertyDescriptor) {
        var lbl = new labels.Label();
        lbl.text = desc.name;
        lbl.horizontalAlignment = "left";
        stack.addChild(lbl);

        var sw = new switches.Switch();
        sw.checked = desc.value;
        sw.horizontalAlignment = "left";
        stack.addChild(sw);

        var options: bindable.BindingOptions = {
            sourceProperty: "checked",
            targetProperty: desc.name,
        };
        control.bind(options, sw);
    }

constructor() {
        super();

        var counter: number = 0;

        var lbl = new label.Label();
        lbl.id = "my-test-label";
        var btn = new button.Button();
        btn.text = "Tap me!";
        btn.on(button.Button.tapEvent, (args: observable.EventData) => {
            lbl.text = "Tap " + counter++;
        });

        this.addChild(lbl);
        this.addChild(btn);

        this.className = "MyStackLayout";
    }
}

constructor() {
        super();

        var label = new LabelModule.Label();
        label.text = "Label created within a page module css.";

        this.content = label;
    }
}

var img = new Image();
    img.src = defaultImageSource;

    img.width = 80;
    img.height = 80;
    img.verticalAlignment = "bottom";
    GridLayout.setRowSpan(img, 2);
    grid.addChild(img);

    var titleLabel = new Label();
    titleLabel.textWrap = true;
    titleLabel.text = "some text goes here";
    GridLayout.setColumn(titleLabel, 1);
    grid.addChild(titleLabel);

    var commentsLabel = new Label();
    commentsLabel.text = "comments";
    commentsLabel.verticalAlignment = "bottom";
    GridLayout.setRow(commentsLabel, 1);
    GridLayout.setColumn(commentsLabel, 1);
    grid.addChild(commentsLabel);

    var page = new Page();
    page.content = stack;
    page.css = "GridLayout { background-color: yellow } image { background-color: green } label { background-color: red } stackpnael { background-color: pink }";

    return page;
}