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<!DOCTYPE html>
<!--
@license
Copyright (C) 2016 The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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http://www.apache.org/licenses/LICENSE-2.0
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<meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1.0, user-scalable=yes">
<meta charset="utf-8">
<title>gr-cursor-manager</title>
<script src="/node_modules/@webcomponents/webcomponentsjs/custom-elements-es5-adapter.js"></script>
<script src="/node_modules/@webcomponents/webcomponentsjs/webcomponents-lite.js"></script>
<script src="/components/wct-browser-legacy/browser.js"></script>
<test-fixture id="basic">
<template>
<gr-cursor-manager cursor-target-class="targeted"></gr-cursor-manager>
<ul>
<li>A</li>
<li>B</li>
<li>C</li>
<li>D</li>
</ul>
</template>
</test-fixture>
<script type="module">
import '../../../test/common-test-setup.js';
import './gr-cursor-manager.js';
suite('gr-cursor-manager tests', () => {
let sandbox;
let element;
let list;
setup(() => {
sandbox = sinon.sandbox.create();
const fixtureElements = fixture('basic');
element = fixtureElements[0];
list = fixtureElements[1];
});
teardown(() => {
sandbox.restore();
});
test('core cursor functionality', () => {
// The element is initialized into the proper state.
assert.isArray(element.stops);
assert.equal(element.stops.length, 0);
assert.equal(element.index, -1);
assert.isNotOk(element.target);
// Initialize the cursor with its stops.
element.stops = list.querySelectorAll('li');
// It should have the stops but it should not be targeting any of them.
assert.isNotNull(element.stops);
assert.equal(element.stops.length, 4);
assert.equal(element.index, -1);
assert.isNotOk(element.target);
// Select the third stop.
element.setCursor(list.children[2]);
// It should update its internal state and update the element's class.
assert.equal(element.index, 2);
assert.equal(element.target, list.children[2]);
assert.isTrue(list.children[2].classList.contains('targeted'));
assert.isFalse(element.isAtStart());
assert.isFalse(element.isAtEnd());
// Progress the cursor.
element.next();
// Confirm that the next stop is selected and that the previous stop is
// unselected.
assert.equal(element.index, 3);
assert.equal(element.target, list.children[3]);
assert.isTrue(element.isAtEnd());
assert.isFalse(list.children[2].classList.contains('targeted'));
assert.isTrue(list.children[3].classList.contains('targeted'));
// Progress the cursor.
element.next();
// We should still be at the end.
assert.equal(element.index, 3);
assert.equal(element.target, list.children[3]);
assert.isTrue(element.isAtEnd());
// Wind the cursor all the way back to the first stop.
element.previous();
element.previous();
element.previous();
// The element state should reflect the end of the list.
assert.equal(element.index, 0);
assert.equal(element.target, list.children[0]);
assert.isTrue(element.isAtStart());
assert.isTrue(list.children[0].classList.contains('targeted'));
const newLi = document.createElement('li');
newLi.textContent = 'Z';
list.insertBefore(newLi, list.children[0]);
element.stops = list.querySelectorAll('li');
assert.equal(element.index, 1);
// De-select all targets.
element.unsetCursor();
// There should now be no cursor target.
assert.isFalse(list.children[1].classList.contains('targeted'));
assert.isNotOk(element.target);
assert.equal(element.index, -1);
});
test('next() goes to first element when no cursor is set', () => {
element.stops = list.querySelectorAll('li');
element.next();
assert.equal(element.index, 0);
assert.equal(element.target, list.children[0]);
assert.isTrue(list.children[0].classList.contains('targeted'));
assert.isTrue(element.isAtStart());
assert.isFalse(element.isAtEnd());
});
test('next() goes to first element when no cursor is set', () => {
element.stops = list.querySelectorAll('li');
element.previous();
const lastIndex = list.children.length - 1;
assert.equal(element.index, lastIndex);
assert.equal(element.target, list.children[lastIndex]);
assert.isTrue(list.children[lastIndex].classList.contains('targeted'));
assert.isFalse(element.isAtStart());
assert.isTrue(element.isAtEnd());
});
test('_moveCursor', () => {
// Initialize the cursor with its stops.
element.stops = list.querySelectorAll('li');
// Select the first stop.
element.setCursor(list.children[0]);
const getTargetHeight = sinon.stub();
// Move the cursor without an optional get target height function.
element._moveCursor(1);
assert.isFalse(getTargetHeight.called);
// Move the cursor with an optional get target height function.
element._moveCursor(1, null, getTargetHeight);
assert.isTrue(getTargetHeight.called);
});
test('_moveCursor from for invalid index does not check height', () => {
element.stops = [];
const getTargetHeight = sinon.stub();
element._moveCursor(1, () => false, getTargetHeight);
assert.isFalse(getTargetHeight.called);
});
test('opt_noScroll', () => {
sandbox.stub(element, '_targetIsVisible', () => false);
const scrollStub = sandbox.stub(window, 'scrollTo');
element.stops = list.querySelectorAll('li');
element.scrollBehavior = 'keep-visible';
element.setCursorAtIndex(1, true);
assert.isFalse(scrollStub.called);
element.setCursorAtIndex(2);
assert.isTrue(scrollStub.called);
});
test('_getNextindex', () => {
const isLetterB = function(row) {
return row.textContent === 'B';
};
element.stops = list.querySelectorAll('li');
// Start cursor at the first stop.
element.setCursor(list.children[0]);
// Move forward to meet the next condition.
assert.equal(element._getNextindex(1, isLetterB), 1);
element.index = 1;
// Nothing else meets the condition, should be at last stop.
assert.equal(element._getNextindex(1, isLetterB), 3);
element.index = 3;
// Should stay at last stop if try to proceed.
assert.equal(element._getNextindex(1, isLetterB), 3);
// Go back to the previous condition met. Should be back at.
// stop 1.
assert.equal(element._getNextindex(-1, isLetterB), 1);
element.index = 1;
// Go back. No more meet the condition. Should be at stop 0.
assert.equal(element._getNextindex(-1, isLetterB), 0);
});
test('focusOnMove prop', () => {
const listEls = list.querySelectorAll('li');
for (let i = 0; i < listEls.length; i++) {
sandbox.spy(listEls[i], 'focus');
}
element.stops = listEls;
element.setCursor(list.children[0]);
element.focusOnMove = false;
element.next();
assert.isFalse(element.target.focus.called);
element.focusOnMove = true;
element.next();
assert.isTrue(element.target.focus.called);
});
suite('_scrollToTarget', () => {
let scrollStub;
setup(() => {
element.stops = list.querySelectorAll('li');
element.scrollBehavior = 'keep-visible';
// There is a target which has a targetNext
element.setCursor(list.children[0]);
element._moveCursor(1);
scrollStub = sandbox.stub(window, 'scrollTo');
window.innerHeight = 60;
});
test('Called when top and bottom not visible', () => {
sandbox.stub(element, '_targetIsVisible').returns(false);
element._scrollToTarget();
assert.isTrue(scrollStub.called);
});
test('Not called when top and bottom visible', () => {
sandbox.stub(element, '_targetIsVisible').returns(true);
element._scrollToTarget();
assert.isFalse(scrollStub.called);
});
test('Called when top is visible, bottom is not, scroll is lower', () => {
const visibleStub = sandbox.stub(element, '_targetIsVisible',
() => visibleStub.callCount === 2);
sandbox.stub(element, '_getWindowDims').returns({
scrollX: 123,
scrollY: 15,
innerHeight: 1000,
pageYOffset: 0,
});
sandbox.stub(element, '_calculateScrollToValue').returns(20);
element._scrollToTarget();
assert.isTrue(scrollStub.called);
assert.isTrue(scrollStub.calledWithExactly(123, 20));
assert.equal(visibleStub.callCount, 2);
});
test('Called when top is visible, bottom not, scroll is higher', () => {
const visibleStub = sandbox.stub(element, '_targetIsVisible',
() => visibleStub.callCount === 2);
sandbox.stub(element, '_getWindowDims').returns({
scrollX: 123,
scrollY: 25,
innerHeight: 1000,
pageYOffset: 0,
});
sandbox.stub(element, '_calculateScrollToValue').returns(20);
element._scrollToTarget();
assert.isFalse(scrollStub.called);
assert.equal(visibleStub.callCount, 2);
});
test('_calculateScrollToValue', () => {
sandbox.stub(element, '_getWindowDims').returns({
scrollX: 123,
scrollY: 25,
innerHeight: 300,
pageYOffset: 0,
});
assert.equal(element._calculateScrollToValue(1000, {offsetHeight: 10}),
905);
});
});
});
</script>