1 files changed, 87 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_filter-editor-04.js b/devtools/client/shared/test/browser_filter-editor-04.js
new file mode 100644
index 000000000..c1c8f4380
--- /dev/null
+++ b/devtools/client/shared/test/browser_filter-editor-04.js
@@ -0,0 +1,87 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests the Filter Editor Widget's drag-drop re-ordering
+
+const {CSSFilterEditorWidget} = require("devtools/client/shared/widgets/FilterWidget");
+const {getClientCssProperties} = require("devtools/shared/fronts/css-properties");
+const LIST_ITEM_HEIGHT = 32;
+
+const TEST_URI = `data:text/html,<div id="filter-container" />`;
+
+add_task(function* () {
+  let [,, doc] = yield createHost("bottom", TEST_URI);
+  const cssIsValid = getClientCssProperties().getValidityChecker(doc);
+
+  const container = doc.querySelector("#filter-container");
+  const initialValue = "blur(2px) contrast(200%) brightness(200%)";
+  let widget = new CSSFilterEditorWidget(container, initialValue, cssIsValid);
+
+  const filters = widget.el.querySelector("#filters");
+  function first() {
+    return filters.children[0];
+  }
+  function mid() {
+    return filters.children[1];
+  }
+  function last() {
+    return filters.children[2];
+  }
+
+  info("Test re-ordering neighbour filters");
+  widget._mouseDown({
+    target: first().querySelector("i"),
+    pageY: 0
+  });
+  widget._mouseMove({ pageY: LIST_ITEM_HEIGHT });
+
+  // Element re-ordering should be instant
+  is(mid().querySelector("label").textContent, "blur",
+     "Should reorder elements correctly");
+
+  widget._mouseUp();
+
+  is(widget.getCssValue(), "contrast(200%) blur(2px) brightness(200%)",
+     "Should reorder filters objects correctly");
+
+  info("Test re-ordering first and last filters");
+  widget._mouseDown({
+    target: first().querySelector("i"),
+    pageY: 0
+  });
+  widget._mouseMove({ pageY: LIST_ITEM_HEIGHT * 2 });
+
+  // Element re-ordering should be instant
+  is(last().querySelector("label").textContent, "contrast",
+     "Should reorder elements correctly");
+  widget._mouseUp();
+
+  is(widget.getCssValue(), "brightness(200%) blur(2px) contrast(200%)",
+     "Should reorder filters objects correctly");
+
+  info("Test dragging first element out of list");
+  const boundaries = filters.getBoundingClientRect();
+
+  widget._mouseDown({
+    target: first().querySelector("i"),
+    pageY: 0
+  });
+  widget._mouseMove({ pageY: -LIST_ITEM_HEIGHT * 5 });
+  ok(first().getBoundingClientRect().top >= boundaries.top,
+     "First filter should not move outside filter list");
+
+  widget._mouseUp();
+
+  info("Test dragging last element out of list");
+  widget._mouseDown({
+    target: last().querySelector("i"),
+    pageY: 0
+  });
+  widget._mouseMove({ pageY: -LIST_ITEM_HEIGHT * 5 });
+  ok(last().getBoundingClientRect().bottom <= boundaries.bottom,
+     "Last filter should not move outside filter list");
+
+  widget._mouseUp();
+});