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Bug 985089 - Allow QA to set a pref to control experiment sampling values, r=felipe

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This commit is contained in:
Benjamin Smedberg 2014-03-20 11:19:19 -04:00
parent 8e3d7eee0b
commit d35ee16d63
1 changed files with 13 additions and 0 deletions
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13
browser/experiments/Experiments.jsm
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@ -52,6 +52,7 @@ const PREF_LOGGING_DUMP = PREF_LOGGING + ".dump"; // experiments.logging
const PREF_MANIFEST_URI = "manifest.uri"; // experiments.logging.manifest.uri
const PREF_MANIFEST_CHECKCERT = "manifest.cert.checkAttributes"; // experiments.manifest.cert.checkAttributes
const PREF_MANIFEST_REQUIREBUILTIN = "manifest.cert.requireBuiltin"; // experiments.manifest.cert.requireBuiltin
const PREF_FORCE_SAMPLE = "force-sample-value"; // experiments.force-sample-value
const PREF_HEALTHREPORT_ENABLED = "datareporting.healthreport.service.enabled";
@ -164,6 +165,18 @@ Experiments.Policy.prototype = {
},
random: function () {
let pref = gPrefs.get(PREF_FORCE_SAMPLE);
if (pref !== undefined) {
let val = Number.parseFloat(pref);
gLogger.debug("Experiments::Policy::random sample forced: " + val);
if (IsNaN(val) || val < 0) {
return 0;
}
if (val > 1) {
return 1;
}
return val;
}
return Math.random();
},