1 files changed, 75 insertions, 0 deletions
diff --git a/testing/web-platform/tests/editing/include/editor-test-utils.js b/testing/web-platform/tests/editing/include/editor-test-utils.js
index d0d50d22a6..b180f3343f 100644
--- a/testing/web-platform/tests/editing/include/editor-test-utils.js
+++ b/testing/web-platform/tests/editing/include/editor-test-utils.js
@@ -424,4 +424,79 @@ class EditorTestUtils {
       );
     }
   }
+
+  static getRangeArrayDescription(arrayOfRanges) {
+    if (arrayOfRanges === null) {
+      return "null";
+    }
+    if (arrayOfRanges === undefined) {
+      return "undefined";
+    }
+    if (!Array.isArray(arrayOfRanges)) {
+      return "Unknown Object";
+    }
+    if (arrayOfRanges.length === 0) {
+      return "[]";
+    }
+    let result = "";
+    for (let range of arrayOfRanges) {
+      if (result === "") {
+        result = "[";
+      } else {
+        result += ",";
+      }
+      result += `{${EditorTestUtils.getRangeDescription(range)}}`;
+    }
+    result += "]";
+    return result;
+  }
+
+  static getNodeDescription(node) {
+    if (!node) {
+      return "null";
+    }
+    switch (node.nodeType) {
+      case Node.TEXT_NODE:
+      case Node.COMMENT_NODE:
+      case Node.CDATA_SECTION_NODE:
+        return `${node.nodeName} "${node.data.replaceAll("\n", "\\\\n")}"`;
+      case Node.ELEMENT_NODE:
+        return `<${node.nodeName.toLowerCase()}${
+            node.hasAttribute("id") ? ` id="${node.getAttribute("id")}"` : ""
+          }${
+            node.hasAttribute("class") ? ` class="${node.getAttribute("class")}"` : ""
+          }${
+            node.hasAttribute("contenteditable")
+              ? ` contenteditable="${node.getAttribute("contenteditable")}"`
+              : ""
+          }${
+            node.inert ? ` inert` : ""
+          }${
+            node.hidden ? ` hidden` : ""
+          }${
+            node.readonly ? ` readonly` : ""
+          }${
+            node.disabled ? ` disabled` : ""
+          }>`;
+      default:
+        return `${node.nodeName}`;
+    }
+  }
+
+  static getRangeDescription(range) {
+    if (range === null) {
+      return "null";
+    }
+    if (range === undefined) {
+      return "undefined";
+    }
+    return range.startContainer == range.endContainer &&
+      range.startOffset == range.endOffset
+      ? `(${EditorTestUtils.getNodeDescription(range.startContainer)}, ${range.startOffset})`
+      : `(${EditorTestUtils.getNodeDescription(range.startContainer)}, ${
+          range.startOffset
+        }) - (${EditorTestUtils.getNodeDescription(range.endContainer)}, ${range.endOffset})`;
+  }
+
+
 }