1 files changed, 50 insertions, 0 deletions
diff --git a/modules/libpref/test/unit/test_bug790374.js b/modules/libpref/test/unit/test_bug790374.js
new file mode 100644
index 0000000000..d4271a7ff7
--- /dev/null
+++ b/modules/libpref/test/unit/test_bug790374.js
@@ -0,0 +1,50 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/  */
+
+function run_test() {
+  const PREF_NAME = "testPref";
+
+  var prefs = Services.prefs.getDefaultBranch(null);
+  var userprefs = Services.prefs.getBranch(null);
+
+  /* First, test to make sure we can parse a float from a string properly. */
+  prefs.setCharPref(PREF_NAME, "9.674");
+  prefs.lockPref(PREF_NAME);
+  var myFloat = 9.674;
+  var fudge = 0.001;
+  var floatPref = userprefs.getFloatPref(PREF_NAME);
+  Assert.ok(myFloat + fudge >= floatPref);
+  Assert.ok(myFloat - fudge <= floatPref);
+
+  /* Now test some failure conditions. */
+  prefs.unlockPref(PREF_NAME);
+  prefs.setCharPref(PREF_NAME, "");
+  prefs.lockPref(PREF_NAME);
+  do_check_throws(function () {
+    userprefs.getFloatPref(PREF_NAME);
+  }, Cr.NS_ERROR_ILLEGAL_VALUE);
+
+  prefs.unlockPref(PREF_NAME);
+  prefs.setCharPref(PREF_NAME, "18.0a1");
+  prefs.lockPref(PREF_NAME);
+
+  do_check_throws(function () {
+    userprefs.getFloatPref(PREF_NAME);
+  }, Cr.NS_ERROR_ILLEGAL_VALUE);
+
+  prefs.unlockPref(PREF_NAME);
+  prefs.setCharPref(PREF_NAME, "09.25.2012");
+  prefs.lockPref(PREF_NAME);
+
+  do_check_throws(function () {
+    userprefs.getFloatPref(PREF_NAME);
+  }, Cr.NS_ERROR_ILLEGAL_VALUE);
+
+  prefs.unlockPref(PREF_NAME);
+  prefs.setCharPref(PREF_NAME, "aString");
+  prefs.lockPref(PREF_NAME);
+
+  do_check_throws(function () {
+    userprefs.getFloatPref(PREF_NAME);
+  }, Cr.NS_ERROR_ILLEGAL_VALUE);
+}