} else {
                        assert.strictEqual(this.div.style.getPropertyValue('display'), style.display, `display should be '' at ${label} (hide is ${this.hide}, appliedHide is ${this.appliedHide})`);
                        assert.strictEqual(this.div.style.getPropertyPriority('display'), '', `priority should be '' at ${label} (hide is ${this.hide}, appliedHide is ${this.appliedHide})`);
                      }