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Test Info:

/* Any copyright is dedicated to the Public Domain.
"use strict";
// Tests removing a property by clearing the property name and pressing shift
// and tab keys, and checks if the focus is moved to the appropriate editable
// field.
const TEST_URI = `
<style type='text/css'>
#testid {
background-color: #00F;
color: #00F;
}
</style>
<div id='testid'>Styled Node</div>
`;
add_task(async function () {
await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
const { inspector, view } = await openRuleView();
await selectNode("#testid", inspector);
info("Getting the second property in the rule");
const rule = getRuleViewRuleEditor(view, 1).rule;
let prop = rule.textProps[1];
info("Clearing the property value and pressing shift-tab");
let editor = await focusEditableField(view, prop.editor.valueSpan);
const onValueDone = view.once("ruleview-changed");
editor.input.value = "";
EventUtils.synthesizeKey("VK_TAB", { shiftKey: true }, view.styleWindow);
await onValueDone;
let newValue = await getRulePropertyValue(0, 0, "color");
is(newValue, "", "color should have been unset.");
is(
prop.editor.valueSpan.textContent,
"",
"'' property value is correctly set."
);
info("Pressing shift-tab again to focus the previous property value");
const onValueFocused = view.once("ruleview-changed");
EventUtils.synthesizeKey("VK_TAB", { shiftKey: true }, view.styleWindow);
await onValueFocused;
info("Getting the first property in the rule");
prop = rule.textProps[0];
editor = inplaceEditor(view.styleDocument.activeElement);
is(
inplaceEditor(prop.editor.valueSpan),
editor,
"Focus should have moved to the previous property value"
);
info("Pressing shift-tab again to focus the property name");
const onNameFocused = view.once("ruleview-changed");
EventUtils.synthesizeKey("VK_TAB", { shiftKey: true }, view.styleWindow);
await onNameFocused;
info("Removing the name and pressing shift-tab to focus the selector");
const onNameDeleted = view.once("ruleview-changed");
EventUtils.synthesizeKey("VK_DELETE", {}, view.styleWindow);
EventUtils.synthesizeKey("VK_TAB", { shiftKey: true }, view.styleWindow);
await onNameDeleted;
newValue = await getRulePropertyValue(0, 0, "background-color");
is(newValue, "", "background-color should have been unset.");
editor = inplaceEditor(view.styleDocument.activeElement);
is(
inplaceEditor(rule.editor.selectorText),
editor,
"Focus should have moved to the selector text."
);
is(rule.textProps.length, 0, "All properties should have been removed.");
ok(
!rule.editor.propertyList.hasChildNodes(),
"Should not have any properties."
);
});