1 files changed, 11 insertions, 0 deletions
diff --git a/comm/mailnews/mime/test/unit/custom_header.js b/comm/mailnews/mime/test/unit/custom_header.js
new file mode 100644
index 0000000000..af2af97780
--- /dev/null
+++ b/comm/mailnews/mime/test/unit/custom_header.js
@@ -0,0 +1,11 @@
+// Custom header support for testing structured_headers.js
+
+/* globals jsmime */
+
+jsmime.headerparser.addStructuredDecoder("X-Unusual", function (hdrs) {
+  return Number.parseInt(hdrs[hdrs.length - 1], 16);
+});
+
+jsmime.headeremitter.addStructuredEncoder("X-Unusual", function (val) {
+  this.addUnstructured(val.toString(16));
+});