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Fix visible to work with elements in the Shadow DOM #72

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Fix visible to work with elements in the Shadow DOM #72

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6 changes: 4 additions & 2 deletions chai-dom.js
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Original file line number Diff line number Diff line change
Expand Up @@ -350,7 +350,8 @@

chai.Assertion.addProperty('displayed', function() {
var el = flag(this, 'object'),
actual = el.getRootNode({ composed: true }) === document ? window.getComputedStyle(el).display : el.style.display
isAttached = el.getRootNode ? el.getRootNode({ composed: true }) === document : document.body.contains(el),
actual = isAttached ? window.getComputedStyle(el).display : el.style.display

this.assert(
actual !== 'none'
Expand All @@ -362,7 +363,8 @@

chai.Assertion.addProperty('visible', function() {
var el = flag(this, 'object'),
actual = document.body.contains(el) ? window.getComputedStyle(el).visibility : el.style.visibility
isAttached = el.getRootNode ? el.getRootNode({ composed: true }) === document : document.body.contains(el),
actual = isAttached ? window.getComputedStyle(el).visibility : el.style.visibility

this.assert(
actual !== 'hidden' && actual !== 'collapse'
Expand Down
35 changes: 22 additions & 13 deletions test/tests.js
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,18 @@ describe('DOM assertions', function() {
})
})

class CustomElement extends HTMLElement {
constructor() {
super()
this.attachShadow({ mode: 'open' })
var template = document.createElement('template')
template.innerHTML = '<style>div { display: none; visibility: hidden; }</style>'
this.shadowRoot.appendChild(template.content.cloneNode(true))
this.shadowRoot.appendChild(document.createElement('div'))
}
}
window.customElements.define('custom-element', CustomElement)

describe('attr', function() {
beforeEach(function() {
subject = parse('<div name="foo"></div>')
Expand Down Expand Up @@ -837,23 +849,13 @@ describe('DOM assertions', function() {
})

describe('displayed', function() {
class CustomElement extends HTMLElement {
constructor() {
super()
this.attachShadow({ mode: 'open' })
this.shadowRoot.appendChild(document.createElement('div'))
}
}

var ce = document.createElement('custom-element'),
div = document.createElement('div'),
notDisplayedViaStyle = parse('<div style="display: none"></div>'),
notDisplayedViaCSS = parse('<div class="hidden"></div>'),
inlineDiv = parse('<div style="display: inline-block"></div>')

before(function() {
window.customElements.define('custom-element', CustomElement)

document.styleSheets[1].insertRule('.hidden { display: none; }', 0);
document.body.appendChild(notDisplayedViaCSS)
document.body.appendChild(div)
Expand Down Expand Up @@ -899,13 +901,14 @@ describe('DOM assertions', function() {
div.should.be.displayed.and.exist.and.be.ok
})

it('passes when the element is in the shadow DOM', function() {
ce.shadowRoot.querySelector('div').should.be.displayed
it('passes negated when the element is in the shadow DOM', function() {
ce.shadowRoot.querySelector('div').should.not.be.displayed
})
})

describe('visible', function() {
var div = document.createElement('div'),
var ce = document.createElement('custom-element'),
div = document.createElement('div'),
hiddenViaStyle = parse('<div style="visibility: hidden"></div>'),
collapsedViaStyle = parse('<div style="visibility: collapse"></div>'),
hiddenViaCSS = parse('<div class="invisible"></div>'),
Expand All @@ -917,11 +920,13 @@ describe('DOM assertions', function() {
document.body.appendChild(hiddenViaCSS)
document.body.appendChild(collapsedViaCSS)
document.body.appendChild(div)
document.body.appendChild(ce)
})
after(function() {
document.body.removeChild(hiddenViaCSS)
document.body.removeChild(collapsedViaCSS)
document.body.removeChild(div)
document.body.removeChild(ce)
})

it('passes when visible (any visibility value but hidden or collapse)', function() {
Expand Down Expand Up @@ -964,6 +969,10 @@ describe('DOM assertions', function() {
it('should be chainable', function() {
div.should.be.visible.and.exist.and.be.ok
})

it('passes negated when the element is in the shadow DOM', function() {
ce.shadowRoot.querySelector('div').should.not.be.visible
})
})

describe('tagName', function() {
Expand Down