1 files changed, 100 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_filter-editor-10.js b/devtools/client/shared/test/browser_filter-editor-10.js
new file mode 100644
index 0000000000..248ee0c506
--- /dev/null
+++ b/devtools/client/shared/test/browser_filter-editor-10.js
@@ -0,0 +1,100 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests the Filter Editor Widget inputs increase/decrease value when cursor is
+// on a number using arrow keys if cursor is behind/mid/after the number strings
+
+const {
+  CSSFilterEditorWidget,
+} = require("resource://devtools/client/shared/widgets/FilterWidget.js");
+
+const DEFAULT_VALUE_MULTIPLIER = 1;
+
+const TEST_URI = CHROME_URL_ROOT + "doc_filter-editor-01.html";
+
+add_task(async function () {
+  const { doc } = await createHost("bottom", TEST_URI);
+
+  const container = doc.querySelector("#filter-container");
+  const initialValue = "drop-shadow(rgb(0, 0, 0) 10px 1px 0px)";
+  const widget = new CSSFilterEditorWidget(container, initialValue);
+  const input = widget.el.querySelector("#filters input");
+
+  let value = 10;
+
+  triggerKey = triggerKey.bind(widget);
+
+  info("Test increment/decrement of string-type numbers without selection");
+
+  input.setSelectionRange(14, 14);
+  triggerKey(40);
+
+  value -= DEFAULT_VALUE_MULTIPLIER;
+  is(
+    widget.getValueAt(0),
+    val(value),
+    "Should work with cursor in the middle of number"
+  );
+
+  input.setSelectionRange(13, 13);
+  triggerKey(38);
+
+  value += DEFAULT_VALUE_MULTIPLIER;
+  is(
+    widget.getValueAt(0),
+    val(value),
+    "Should work with cursor before the number"
+  );
+
+  input.setSelectionRange(15, 15);
+  triggerKey(40);
+
+  value -= DEFAULT_VALUE_MULTIPLIER;
+  is(
+    widget.getValueAt(0),
+    val(value),
+    "Should work with cursor after the number"
+  );
+
+  info("Test increment/decrement of string-type numbers with a selection");
+
+  input.setSelectionRange(13, 15);
+  triggerKey(38);
+  input.setSelectionRange(13, 18);
+  triggerKey(38);
+
+  value += DEFAULT_VALUE_MULTIPLIER * 2;
+  is(
+    widget.getValueAt(0),
+    val(value),
+    "Should work if a there is a selection, starting with the number"
+  );
+
+  widget.destroy();
+  triggerKey = null;
+});
+
+// Triggers the specified keyCode and modifier key on
+// first filter's input
+function triggerKey(key, modifier) {
+  const filter = this.el.querySelector("#filters").children[0];
+  const input = filter.querySelector("input");
+
+  this._keyDown({
+    target: input,
+    keyCode: key,
+    [modifier]: true,
+    preventDefault() {},
+  });
+}
+
+function val(value) {
+  let v = value.toFixed(1);
+
+  if (v.indexOf(".0") > -1) {
+    v = v.slice(0, -2);
+  }
+  return `rgb(0, 0, 0) ${v}px 1px 0px`;
+}