1 files changed, 84 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_filter-editor-03.js b/devtools/client/shared/test/browser_filter-editor-03.js
new file mode 100644
index 0000000000..4c66134ea9
--- /dev/null
+++ b/devtools/client/shared/test/browser_filter-editor-03.js
@@ -0,0 +1,84 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests the Filter Editor Widget add, removeAt, updateAt, getValueAt methods
+
+const {
+  CSSFilterEditorWidget,
+} = require("resource://devtools/client/shared/widgets/FilterWidget.js");
+const GRAYSCALE_MAX = 100;
+const INVERT_MIN = 0;
+
+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 widget = new CSSFilterEditorWidget(container, "none");
+
+  info("Test add method");
+  const blur = widget.add("blur", "10.2px");
+  is(widget.getCssValue(), "blur(10.2px)", "Should add filters");
+
+  const url = widget.add("url", "test.svg");
+  is(
+    widget.getCssValue(),
+    "blur(10.2px) url(test.svg)",
+    "Should add filters in order"
+  );
+
+  info("Test updateValueAt method");
+  widget.updateValueAt(url, "test2.svg");
+  widget.updateValueAt(blur, 5);
+  is(
+    widget.getCssValue(),
+    "blur(5px) url(test2.svg)",
+    "Should update values correctly"
+  );
+
+  info("Test getValueAt method");
+  is(widget.getValueAt(blur), "5px", "Should return value + unit");
+  is(
+    widget.getValueAt(url),
+    "test2.svg",
+    "Should return value for string-type filters"
+  );
+
+  info("Test removeAt method");
+  widget.removeAt(url);
+  is(widget.getCssValue(), "blur(5px)", "Should remove the specified filter");
+
+  info("Test add method applying filter range to value");
+  const grayscale = widget.add("grayscale", GRAYSCALE_MAX + 1);
+  is(
+    widget.getValueAt(grayscale),
+    `${GRAYSCALE_MAX}%`,
+    "Shouldn't allow values higher than max"
+  );
+
+  const invert = widget.add("invert", INVERT_MIN - 1);
+  is(
+    widget.getValueAt(invert),
+    `${INVERT_MIN}%`,
+    "Shouldn't allow values less than INVERT_MIN"
+  );
+
+  info("Test updateValueAt method applying filter range to value");
+  widget.updateValueAt(grayscale, GRAYSCALE_MAX + 1);
+  is(
+    widget.getValueAt(grayscale),
+    `${GRAYSCALE_MAX}%`,
+    "Shouldn't allow values higher than max"
+  );
+
+  widget.updateValueAt(invert, INVERT_MIN - 1);
+  is(
+    widget.getValueAt(invert),
+    `${INVERT_MIN}%`,
+    "Shouldn't allow values less than INVERT_MIN"
+  );
+  widget.destroy();
+});