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-rw-r--r--devtools/client/shared/test/browser_prefs-02.js45
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diff --git a/devtools/client/shared/test/browser_prefs-02.js b/devtools/client/shared/test/browser_prefs-02.js
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+++ b/devtools/client/shared/test/browser_prefs-02.js
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+/* 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("devtools/client/shared/prefs");
+
+function test() {
+ let originalJson = Services.prefs.getCharPref(
+ "devtools.performance.timeline.hidden-markers");
+ let originalFloat = Services.prefs.getCharPref(
+ "devtools.performance.memory.sample-probability");
+
+ let Prefs = new PrefsHelper("devtools.performance", {
+ "float": ["Float", "memory.sample-probability"],
+ "json": ["Json", "timeline.hidden-markers"]
+ });
+
+ Prefs.registerObserver();
+
+ // Float
+ Services.prefs.setCharPref("devtools.performance.timeline.hidden-markers", "{\"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).");
+
+ // Float
+ Services.prefs.setCharPref("devtools.performance.memory.sample-probability", "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.setCharPref("devtools.performance.timeline.hidden-markers",
+ originalJson);
+ Services.prefs.setCharPref("devtools.performance.memory.sample-probability",
+ originalFloat);
+ finish();
+}