Test size estimations

[JoshuaKGoldberg]

These require before/after functions to set up DOM elements. I haven't checked if those work in gulp-shenanigans yet.

it("estimates a rounded size once the menu area is created", async () => {
    // Arrange
    const roughMenuSize: IAbsoluteSizeSchema = {
        height: 140.1,
        width: 210.1
    };
    const areasFaker = stubAreasFaker({
        styles: {
            ...stubStyles,
            innerArea: {
                height: `${roughMenuSize.height}px`,
                width: `${roughMenuSize.width}px`
            }
        }
    });

    // Act
    const { menuSize } = await areasFaker.createAndAppendMenuArea(stubContainerSize);

    // Assert
    expect(menuSize).to.be.equal({
        height: 140,
        width: 210
    });
});