NativeScript/tests/app/ui/scroll-view/scroll-view-safe-area-tests.ts

import { UITest } from "../../ui-test";
import { ScrollView } from "@nativescript/core/ui/scroll-view";
import { GridLayout } from "@nativescript/core/ui/layouts/grid-layout";
import * as TKUnit from "../../tk-unit";
import * as view from "@nativescript/core/ui/core/view";
import * as platform from "@nativescript/core/platform";

import * as helper from "../../ui-helper";
import { Builder } from "@nativescript/core/ui/builder";
import {
    dipToDp, left, top, right, bottom, height, width,
    equal, lessOrCloseEnough, greaterOrCloseEnough,
    isLeftAlignedWith, isRightAlignedWith, isTopAlignedWith, isBottomAlignedWith,
    isLeftWith, isRightWith, isBelowWith
} from "../layouts/layout-tests-helper";

class ScrollLayoutSafeAreaTest extends UITest<ScrollView> {

    private executeSnippet<U extends { root: view.View }>(ui: U, setup: (ui: U) => void, test: (ui: U) => void, pageOptions?: helper.PageOptions): void {
        function waitUntilTestElementLayoutIsValid(view: view.View, timeoutSec?: number): void {
            TKUnit.waitUntilReady(() => {
                return view.isLayoutValid;
            }, timeoutSec || 1);
        }

        setup(ui);
        helper.buildUIAndRunTest(ui.root, () => {
            waitUntilTestElementLayoutIsValid(ui.root);
            test(ui);
        }, pageOptions);
    }

    private noop() {
        // no operation
    }

    private getViews(template: string) {
        let root = Builder.parse(template);

        return {
            root,
            grid: root.getViewById("grid") as GridLayout,
            stack: root.getViewById("stack") as GridLayout,
            childFirst: root.getViewById("childFirst") as view.View,
            cells: [
                [root.getViewById("cell00") as view.View, root.getViewById("cell01") as view.View, root.getViewById("cell02") as view.View],
                [root.getViewById("cell10") as view.View, root.getViewById("cell11") as view.View, root.getViewById("cell12") as view.View],
                [root.getViewById("cell20") as view.View, root.getViewById("cell21") as view.View, root.getViewById("cell22") as view.View]
            ]
        };
    }

    private scroll_view_in_full_screen(scrollView: view.View, pageOptions?: helper.PageOptions) {
        const l = left(scrollView);
        const t = top(scrollView);
        const r = right(scrollView);
        const b = bottom(scrollView);
        equal(l, 0, `${scrollView}.left - actual:${l}; expected: ${0}`);
        equal(t, 0, `${scrollView}.top - actual:${t}; expected: ${0}`);
        equal(r, platform.screen.mainScreen.widthPixels, `${scrollView}.right - actual:${r}; expected: ${platform.screen.mainScreen.widthPixels}`);
        equal(b, platform.screen.mainScreen.heightPixels, `${scrollView}.bottom - actual:${b}; expected: ${platform.screen.mainScreen.heightPixels}`);
    }

    private scroll_view_in_full_screen_test(pageOptions?: helper.PageOptions) {
        const snippet = `
        <ScrollView id="scroll" backgroundColor="Crimson"></ScrollView>
        `;

        this.executeSnippet(
            this.getViews(snippet),
            this.noop,
            ({ root }) => {
                this.scroll_view_in_full_screen(root, pageOptions);
            },
            pageOptions
        );
    }

    public test_scroll_view_in_full_screen_action_bar() {
        this.scroll_view_in_full_screen_test({ actionBar: true });
    }

    public test_scroll_view_in_full_screen_action_bar_hidden() {
        this.scroll_view_in_full_screen_test({ actionBarHidden: true });
    }

    public test_scroll_view_in_full_screen_action_bar_flat() {
        this.scroll_view_in_full_screen_test({ actionBarFlat: true });
    }

    public test_scroll_view_in_full_screen_tab_bar() {
        this.scroll_view_in_full_screen_test({ tabBar: true });
    }

    private scroll_view_children_components_in_safe_area(pageOptions?: helper.PageOptions) {
        const snippet = `
        <ScrollView id="scroll" backgroundColor="Crimson">
            <StackLayout id="stack">
                <Label id="childFirst" text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
            </StackLayout>
        </ScrollView>
        `;

        this.executeSnippet(
            this.getViews(snippet),
            this.noop,
            ({ root, stack, childFirst }) => {
                const insets = root.getSafeAreaInsets();

                isLeftAlignedWith(root, stack);
                isTopAlignedWith(root, stack);
                isRightAlignedWith(root, stack);

                isLeftWith(root, childFirst, insets.left);
                isBelowWith(root, childFirst, insets.top);
                isRightWith(childFirst, root, insets.right);

                const scrollViewContentHeight = round(dipToDp(root.nativeViewProtected.contentSize.height));
                const sumOfNestedLabelHeightsAndInsets = height(childFirst) * stack.getChildrenCount() + insets.top + insets.bottom;
                equal(scrollViewContentHeight, sumOfNestedLabelHeightsAndInsets, `scroll view content height<${scrollViewContentHeight}> sum of nested label height and insets <${sumOfNestedLabelHeightsAndInsets}>`);
            },
            pageOptions
        );
    }

    public test_scroll_view_children_components_in_safe_area() {
        this.scroll_view_children_components_in_safe_area({ actionBar: true });
    }

    public test_grid_nested_grid_cells_layout_beyond_safe_area_action_bar_hidden() {
        this.scroll_view_children_components_in_safe_area({ actionBarHidden: true });
    }

    public test_grid_nested_grid_cells_layout_beyond_safe_area_action_bar_flat() {
        this.scroll_view_children_components_in_safe_area({ actionBarFlat: true });
    }

    public test_grid_nested_grid_cells_layout_beyond_safe_area_tab_bar() {
        this.scroll_view_children_components_in_safe_area({ tabBar: true });
    }

    private grid_nested_scroll_views_layout_beyond_safe_area(pageOptions?: helper.PageOptions) {
        const snippet = `
        <GridLayout id="grid" rows="*, *, *" columns="*, *, *" backgroundColor="Crimson">
            <ScrollView id="cell00" row="0" col="0" backgroundColor="SkyBlue">
                <StackLayout>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                </StackLayout>
            </ScrollView>
            <ScrollView id="cell01" row="0" col="1" backgroundColor="Indigo">
                <StackLayout>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                </StackLayout>
            </ScrollView>
            <ScrollView id="cell02" row="0" col="2" backgroundColor="Crimson">
                <StackLayout>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                </StackLayout>
            </ScrollView>
            <ScrollView id="cell10" row="1" col="0" backgroundColor="Chocolate">
                <StackLayout>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                </StackLayout>
            </ScrollView>
            <ScrollView id="cell11" row="1" col="1" backgroundColor="Cornsilk">
                <StackLayout>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                </StackLayout>
            </ScrollView>
            <ScrollView id="cell12" row="1" col="2" backgroundColor="BurlyWood">
                <StackLayout>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                </StackLayout>
            </ScrollView>
            <ScrollView id="cell20" row="2" col="0" backgroundColor="GoldenRod">
                <StackLayout>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                </StackLayout>
            </ScrollView>
            <ScrollView id="cell21" row="2" col="1" backgroundColor="Khaki">
                <StackLayout>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                </StackLayout>
            </ScrollView>
            <ScrollView id="cell22" row="2" col="2" backgroundColor="IndianRed">
                <StackLayout>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                    <Label text="overflowing text, overflowing text, overflowing text, overflowing text, overflowing text, overflowing text"></Label>
                </StackLayout>
            </ScrollView>
        </GridLayout>
        `;

        this.executeSnippet(
            this.getViews(snippet),
            this.noop,
            ({ root, grid, cells }) => {
                isLeftAlignedWith(grid, cells[0][0]);
                isLeftAlignedWith(grid, cells[1][0]);
                isLeftAlignedWith(grid, cells[2][0]);

                isTopAlignedWith(grid, cells[0][0]);
                isTopAlignedWith(grid, cells[0][1]);
                isTopAlignedWith(grid, cells[0][2]);

                isRightAlignedWith(grid, cells[0][2]);
                isRightAlignedWith(grid, cells[1][2]);
                isRightAlignedWith(grid, cells[2][2]);

                isBottomAlignedWith(grid, cells[2][0]);
                isBottomAlignedWith(grid, cells[2][1]);
                isBottomAlignedWith(grid, cells[2][2]);

                greaterOrCloseEnough(height(cells[0][1]), height(cells[1][1]), `cell01 height<${height(cells[0][1])}> not greater or close enough cell11 height<${height(cells[1][1])}>`);
                lessOrCloseEnough(height(cells[1][1]), height(cells[2][1]), `cell11 height<${height(cells[1][1])}> not less or close enough cell21 height<${height(cells[2][1])}>`);

                const sumOfNestedScrollViewHeights = height(cells[0][1]) + height(cells[1][1]) + height(cells[2][1]);
                equal(height(grid), sumOfNestedScrollViewHeights, `grid height<${height(grid)}> sum of nested scroll views height <${sumOfNestedScrollViewHeights}>`);

                greaterOrCloseEnough(width(cells[1][0]), width(cells[1][1]), `cell10 width<${width(cells[1][0])}> not greater or close enough cell11 width<${width(cells[1][1])}>`);
                lessOrCloseEnough(width(cells[1][1]), width(cells[1][2]), `cell11 width<${width(cells[1][1])}> not less or close enough cell12 width<${width(cells[1][2])}>`);
                const sumOfNestedScrollViewWidths = width(cells[1][0]) + width(cells[1][1]) + width(cells[1][2]);
                equal(width(grid), sumOfNestedScrollViewWidths, `grid width<${width(grid)}> sum of nested scroll views width <${sumOfNestedScrollViewWidths}>`);
            },
            pageOptions
        );
    }

    public test_grid_nested_scroll_views_layout_beyond_safe_area_action_bar() {
        this.grid_nested_scroll_views_layout_beyond_safe_area({ actionBar: true });
    }

    public test_grid_component_cells_layout_in_safe_area_action_bar_hidden() {
        this.grid_nested_scroll_views_layout_beyond_safe_area({ actionBarHidden: true });
    }

    public test_grid_component_cells_layout_in_safe_area_action_bar_flat() {
        this.grid_nested_scroll_views_layout_beyond_safe_area({ actionBarFlat: true });
    }

    public test_grid_component_cells_layout_in_safe_area_tab_bar() {
        this.grid_nested_scroll_views_layout_beyond_safe_area({ tabBar: true });
    }
}

export function createTestCase(): ScrollLayoutSafeAreaTest {
    return new ScrollLayoutSafeAreaTest();
}