fork from https://github.com/mozilla/pdf.js.git

external/ccov/coverage_format.mjs

@@ -0,0 +1,40 @@
+/* Copyright 2026 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+const COVERAGE_FORMAT_TO_REPORTER = {
+  info: "lcovonly",
+  html: "html",
+  json: "json",
+  text: "text",
+  cobertura: "cobertura",
+  clover: "clover",
+};
+
+function parseCoverageFormats(str) {
+  const formats = new Set();
+  for (const fmt of (str ?? "").split(",")) {
+    const name = fmt.trim();
+    if (name && COVERAGE_FORMAT_TO_REPORTER[name]) {
+      formats.add(name);
+    } else if (name) {
+      console.warn(
+        `### Unknown coverage format "${name}", valid values: ${Object.keys(COVERAGE_FORMAT_TO_REPORTER).join(", ")}`
+      );
+    }
+  }
+  return formats.size > 0 ? formats : new Set(["info"]);
+}
+
+export { COVERAGE_FORMAT_TO_REPORTER, parseCoverageFormats };