@angular/material
Version:
Angular Material
114 lines • 16.6 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { ComponentHarness, HarnessPredicate, parallel } from '@angular/cdk/testing';
import { coerceBooleanProperty, coerceNumberProperty } from '@angular/cdk/coercion';
/** Harness for interacting with a standard mat-slider in tests. */
export class MatSliderHarness extends ComponentHarness {
constructor() {
super(...arguments);
this._textLabel = this.locatorFor('.mat-slider-thumb-label-text');
this._wrapper = this.locatorFor('.mat-slider-wrapper');
}
/**
* Gets a `HarnessPredicate` that can be used to search for a `MatSliderHarness` that meets
* certain criteria.
* @param options Options for filtering which slider instances are considered a match.
* @return a `HarnessPredicate` configured with the given options.
*/
static with(options = {}) {
return new HarnessPredicate(MatSliderHarness, options);
}
/** Gets the slider's id. */
async getId() {
const id = await (await this.host()).getAttribute('id');
// In case no id has been specified, the "id" property always returns
// an empty string. To make this method more explicit, we return null.
return id !== '' ? id : null;
}
/**
* Gets the current display value of the slider. Returns a null promise if the thumb label is
* disabled.
*/
async getDisplayValue() {
const [host, textLabel] = await parallel(() => [this.host(), this._textLabel()]);
if (await host.hasClass('mat-slider-thumb-label-showing')) {
return textLabel.text();
}
return null;
}
/** Gets the current percentage value of the slider. */
async getPercentage() {
return this._calculatePercentage(await this.getValue());
}
/** Gets the current value of the slider. */
async getValue() {
return coerceNumberProperty(await (await this.host()).getAttribute('aria-valuenow'));
}
/** Gets the maximum value of the slider. */
async getMaxValue() {
return coerceNumberProperty(await (await this.host()).getAttribute('aria-valuemax'));
}
/** Gets the minimum value of the slider. */
async getMinValue() {
return coerceNumberProperty(await (await this.host()).getAttribute('aria-valuemin'));
}
/** Whether the slider is disabled. */
async isDisabled() {
const disabled = (await this.host()).getAttribute('aria-disabled');
return coerceBooleanProperty(await disabled);
}
/** Gets the orientation of the slider. */
async getOrientation() {
// "aria-orientation" will always be set to either "horizontal" or "vertical".
return (await this.host()).getAttribute('aria-orientation');
}
/**
* Sets the value of the slider by clicking on the slider track.
*
* Note that in rare cases the value cannot be set to the exact specified value. This
* can happen if not every value of the slider maps to a single pixel that could be
* clicked using mouse interaction. In such cases consider using the keyboard to
* select the given value or expand the slider's size for a better user experience.
*/
async setValue(value) {
const [sliderEl, wrapperEl, orientation] = await parallel(() => [this.host(), this._wrapper(), this.getOrientation()]);
let percentage = await this._calculatePercentage(value);
const { height, width } = await wrapperEl.getDimensions();
const isVertical = orientation === 'vertical';
// In case the slider is inverted in LTR mode or not inverted in RTL mode,
// we need to invert the percentage so that the proper value is set.
if (await sliderEl.hasClass('mat-slider-invert-mouse-coords')) {
percentage = 1 - percentage;
}
// We need to round the new coordinates because creating fake DOM
// events will cause the coordinates to be rounded down.
const relativeX = isVertical ? 0 : Math.round(width * percentage);
const relativeY = isVertical ? Math.round(height * percentage) : 0;
await wrapperEl.click(relativeX, relativeY);
}
/** Focuses the slider. */
async focus() {
return (await this.host()).focus();
}
/** Blurs the slider. */
async blur() {
return (await this.host()).blur();
}
/** Whether the slider is focused. */
async isFocused() {
return (await this.host()).isFocused();
}
/** Calculates the percentage of the given value. */
async _calculatePercentage(value) {
const [min, max] = await parallel(() => [this.getMinValue(), this.getMaxValue()]);
return (value - min) / (max - min);
}
}
/** The selector for the host element of a `MatSlider` instance. */
MatSliderHarness.hostSelector = '.mat-slider';
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To make this method more explicit, we return null.\n    return id !== '' ? id : null;\n  }\n\n  /**\n   * Gets the current display value of the slider. Returns a null promise if the thumb label is\n   * disabled.\n   */\n  async getDisplayValue(): Promise<string|null> {\n    const [host, textLabel] = await parallel(() => [this.host(), this._textLabel()]);\n    if (await host.hasClass('mat-slider-thumb-label-showing')) {\n      return textLabel.text();\n    }\n    return null;\n  }\n\n  /** Gets the current percentage value of the slider. */\n  async getPercentage(): Promise<number> {\n    return this._calculatePercentage(await this.getValue());\n  }\n\n  /** Gets the current value of the slider. */\n  async getValue(): Promise<number> {\n    return coerceNumberProperty(await (await this.host()).getAttribute('aria-valuenow'));\n  }\n\n  /** Gets the maximum value of the slider. */\n  async getMaxValue(): Promise<number> {\n    return coerceNumberProperty(await (await this.host()).getAttribute('aria-valuemax'));\n  }\n\n  /** Gets the minimum value of the slider. */\n  async getMinValue(): Promise<number> {\n    return coerceNumberProperty(await (await this.host()).getAttribute('aria-valuemin'));\n  }\n\n  /** Whether the slider is disabled. */\n  async isDisabled(): Promise<boolean> {\n    const disabled = (await this.host()).getAttribute('aria-disabled');\n    return coerceBooleanProperty(await disabled);\n  }\n\n  /** Gets the orientation of the slider. */\n  async getOrientation(): Promise<'horizontal'|'vertical'> {\n    // \"aria-orientation\" will always be set to either \"horizontal\" or \"vertical\".\n    return (await this.host()).getAttribute('aria-orientation') as any;\n  }\n\n  /**\n   * Sets the value of the slider by clicking on the slider track.\n   *\n   * Note that in rare cases the value cannot be set to the exact specified value. This\n   * can happen if not every value of the slider maps to a single pixel that could be\n   * clicked using mouse interaction. In such cases consider using the keyboard to\n   * select the given value or expand the slider's size for a better user experience.\n   */\n  async setValue(value: number): Promise<void> {\n    const [sliderEl, wrapperEl, orientation] =\n        await parallel(() => [this.host(), this._wrapper(), this.getOrientation()]);\n    let percentage = await this._calculatePercentage(value);\n    const {height, width} = await wrapperEl.getDimensions();\n    const isVertical = orientation === 'vertical';\n\n    // In case the slider is inverted in LTR mode or not inverted in RTL mode,\n    // we need to invert the percentage so that the proper value is set.\n    if (await sliderEl.hasClass('mat-slider-invert-mouse-coords')) {\n      percentage = 1 - percentage;\n    }\n\n    // We need to round the new coordinates because creating fake DOM\n    // events will cause the coordinates to be rounded down.\n    const relativeX = isVertical ? 0 : Math.round(width * percentage);\n    const relativeY = isVertical ? Math.round(height * percentage) : 0;\n\n    await wrapperEl.click(relativeX, relativeY);\n  }\n\n  /** Focuses the slider. */\n  async focus(): Promise<void> {\n    return (await this.host()).focus();\n  }\n\n  /** Blurs the slider. */\n  async blur(): Promise<void> {\n    return (await this.host()).blur();\n  }\n\n  /** Whether the slider is focused. */\n  async isFocused(): Promise<boolean> {\n    return (await this.host()).isFocused();\n  }\n\n  /** Calculates the percentage of the given value. */\n  private async _calculatePercentage(value: number) {\n    const [min, max] = await parallel(() => [this.getMinValue(), this.getMaxValue()]);\n    return (value - min) / (max - min);\n  }\n}\n"]}