1 files changed, 67 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_prefs-02.js b/devtools/client/shared/test/browser_prefs-02.js
new file mode 100644
index 0000000000..ad32aa29ce
--- /dev/null
+++ b/devtools/client/shared/test/browser_prefs-02.js
@@ -0,0 +1,67 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that preference helpers work properly with custom types of Float and Json.
+
+const { PrefsHelper } = require("resource://devtools/client/shared/prefs.js");
+
+function test() {
+  const Prefs = new PrefsHelper("prefs.helper.test", {
+    float: ["Float", "float"],
+    json: ["Json", "json"],
+    jsonWithSpecialChar: ["Json", "jsonWithSpecialChar"],
+  });
+
+  Prefs.registerObserver();
+
+  // JSON
+  Services.prefs.setCharPref("prefs.helper.test.json", '{"a":1}');
+  is(Prefs.json.a, 1, "The JSON pref value is correctly casted on get.");
+
+  Prefs.json = { b: 2 };
+  is(
+    Prefs.json.a,
+    undefined,
+    "The JSON pref value is correctly casted on set (1)."
+  );
+  is(Prefs.json.b, 2, "The JSON pref value is correctly casted on set (2).");
+
+  // JSON with special character
+  Services.prefs.setStringPref(
+    "prefs.helper.test.jsonWithSpecialChar",
+    `{"hello":"おはよう皆！"}`
+  );
+  is(
+    Prefs.jsonWithSpecialChar.hello,
+    "おはよう皆！",
+    "The JSON pref value with a special character is correctly stored."
+  );
+
+  Prefs.jsonWithSpecialChar = { bye: "さよなら！" };
+  is(
+    Prefs.jsonWithSpecialChar.hello,
+    undefined,
+    "The JSON with the special characters pref value is correctly set. (1)"
+  );
+  is(
+    Prefs.jsonWithSpecialChar.bye,
+    "さよなら！",
+    "The JSON with the special characters pref value is correctly set. (2)"
+  );
+
+  // Float
+  Services.prefs.setCharPref("prefs.helper.test.float", "3.14");
+  is(Prefs.float, 3.14, "The float pref value is correctly casted on get.");
+
+  Prefs.float = 6.28;
+  is(Prefs.float, 6.28, "The float pref value is correctly casted on set.");
+
+  Prefs.unregisterObserver();
+
+  Services.prefs.clearUserPref("prefs.helper.test.float");
+  Services.prefs.clearUserPref("prefs.helper.test.json");
+  Services.prefs.clearUserPref("prefs.helper.test.jsonWithSpecialChar");
+  finish();
+}