discourse/test/javascripts/helpers/assertions.js

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/* exported exists, count, present, blank, containsInstance, not, visible */
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function exists(selector) {
return !!count(selector);
}
function count(selector) {
return find(selector).length;
}
function present(obj, text) {
ok(!Ember.isEmpty(obj), text);
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}
function blank(obj, text) {
ok(Ember.isEmpty(obj), text);
}
function containsInstance(collection, klass, text) {
ok(klass.detectInstance(_.first(collection)), text);
}
function not(state, message) {
ok(!state, message);
}
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function visible(selector) {
return find(selector + ":visible").length > 0;
}
function invisible(selector) {
var $items = find(selector + ":visible");
return $items.length === 0 ||
$items.css("opacity") === "0" ||
$items.css("visibility") === "hidden";
}