1 files changed, 43 insertions, 0 deletions
diff --git a/comm/mailnews/mime/test/unit/test_jsmime_charset.js b/comm/mailnews/mime/test/unit/test_jsmime_charset.js
new file mode 100644
index 0000000000..865c8ae02f
--- /dev/null
+++ b/comm/mailnews/mime/test/unit/test_jsmime_charset.js
@@ -0,0 +1,43 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// This tests that the charset decoding uses nsICharsetDecoder instead of
+// TextDecoder, to get some extra charsets.
+
+const { jsmime } = ChromeUtils.import("resource:///modules/jsmime.jsm");
+
+var tests = [
+  ["=?UTF-7?Q?+AKM-1?=", "\u00A31"],
+  ["=?UTF-7?Q?+AK?= =?UTF-7?Q?M-1?=", "\u00A31"],
+  ["=?UTF-8?Q?=C2?=", "\uFFFD"], // Replacement character for invalid input.
+  ["=?NotARealCharset?Q?text?=", "=?NotARealCharset?Q?text?="],
+  ["\xC2\xA31", "\u00A31", "ISO-8859-2"],
+  ["\xA31", "\u01411", "ISO-8859-2"],
+  ["\xC21", "\u00C21", "ISO-8859-1"],
+  // "Here comes the text." in Japanese encoded in Shift_JIS, also using Thunderbird's alias cp932.
+  [
+    "=?shift_jis?Q?=82=b1=82=b1=82=c9=96=7b=95=b6=82=aa=82=ab=82=dc=82=b7=81=42?=",
+    "ここに本文がきます。",
+  ],
+  ["=?shift_jis?B?grGCsYLJlnuVtoKqgquC3IK3gUI=?=", "ここに本文がきます。"],
+  [
+    "=?cp932?Q?=82=b1=82=b1=82=c9=96=7b=95=b6=82=aa=82=ab=82=dc=82=b7=81=42?=",
+    "ここに本文がきます。",
+  ],
+  ["=?cp932?B?grGCsYLJlnuVtoKqgquC3IK3gUI=?=", "ここに本文がきます。"],
+];
+
+function run_test() {
+  for (let test of tests) {
+    dump("Testing message " + test[0]);
+    let value = test[0];
+    if (test.length > 2) {
+      value = jsmime.headerparser.convert8BitHeader(value, test[2]);
+    }
+    Assert.equal(
+      jsmime.headerparser.parseStructuredHeader("Subject", value),
+      test[1]
+    );
+  }
+}