1 files changed, 23 insertions, 0 deletions
diff --git a/dom/webgpu/tests/cts/checkout/src/common/internal/query/encode_selectively.ts b/dom/webgpu/tests/cts/checkout/src/common/internal/query/encode_selectively.ts
new file mode 100644
index 0000000000..ab1997b6e4
--- /dev/null
+++ b/dom/webgpu/tests/cts/checkout/src/common/internal/query/encode_selectively.ts
@@ -0,0 +1,23 @@
+/**
+ * Encodes a stringified TestQuery so that it can be placed in a `?q=` parameter in a URL.
+ *
+ * `encodeURIComponent` encodes in accordance with `application/x-www-form-urlencoded`,
+ * but URLs don't actually have to be as strict as HTML form encoding
+ * (we interpret this purely from JavaScript).
+ * So we encode the component, then selectively convert some %-encoded escape codes
+ * back to their original form for readability/copyability.
+ */
+export function encodeURIComponentSelectively(s: string): string {
+  let ret = encodeURIComponent(s);
+  ret = ret.replace(/%22/g, '"'); // for JSON strings
+  ret = ret.replace(/%2C/g, ','); // for path separator, and JSON arrays
+  ret = ret.replace(/%3A/g, ':'); // for big separator
+  ret = ret.replace(/%3B/g, ';'); // for param separator
+  ret = ret.replace(/%3D/g, '='); // for params (k=v)
+  ret = ret.replace(/%5B/g, '['); // for JSON arrays
+  ret = ret.replace(/%5D/g, ']'); // for JSON arrays
+  ret = ret.replace(/%7B/g, '{'); // for JSON objects
+  ret = ret.replace(/%7D/g, '}'); // for JSON objects
+  ret = ret.replace(/%E2%9C%97/g, '✗'); // for jsUndefinedMagicValue
+  return ret;
+}