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/* vim: set ts=2 et sw=2 tw=80: */
/* Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/ */
"use strict";
// Test that previews change when the preview text changes. It doesn't check the
// exact preview images because they are drawn on a canvas causing them to vary
// between systems, platforms and software versions.
const TEST_URI = URL_ROOT + "browser_fontinspector.html";
add_task(function* () {
let {view} = yield openFontInspectorForURL(TEST_URI);
let viewDoc = view.chromeDoc;
let previews = viewDoc.querySelectorAll("#all-fonts .font-preview");
let initialPreviews = [...previews].map(p => p.src);
info("Typing 'Abc' to check that the reference previews are correct.");
yield updatePreviewText(view, "Abc");
checkPreviewImages(viewDoc, initialPreviews, true);
info("Typing something else to the preview box.");
yield updatePreviewText(view, "The quick brown");
checkPreviewImages(viewDoc, initialPreviews, false);
info("Blanking the input to restore default previews.");
yield updatePreviewText(view, "");
checkPreviewImages(viewDoc, initialPreviews, true);
});
/**
* Compares the previous preview image URIs to the current URIs.
*
* @param {Document} viewDoc
* The FontInspector document.
* @param {Array[String]} originalURIs
* An array of URIs to compare with the current URIs.
* @param {Boolean} assertIdentical
* If true, this method asserts that the previous and current URIs are
* identical. If false, this method asserts that the previous and current
* URI's are different.
*/
function checkPreviewImages(viewDoc, originalURIs, assertIdentical) {
let previews = viewDoc.querySelectorAll("#all-fonts .font-preview");
let newURIs = [...previews].map(p => p.src);
is(newURIs.length, originalURIs.length,
"The number of previews has not changed.");
for (let i = 0; i < newURIs.length; ++i) {
if (assertIdentical) {
is(newURIs[i], originalURIs[i],
`The preview image at index ${i} has stayed the same.`);
} else {
isnot(newURIs[i], originalURIs[i],
`The preview image at index ${i} has changed.`);
}
}
}
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