Query param assignment, eg: ?assign=testname:bucketname

dollarshaveclub · Oct 28, 2016 · 91eb26a · 91eb26a
1 parent eda4878
commit 91eb26a
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Showing 4 changed files with 22 additions and 6 deletions.
diff --git a/build/test-interface.min.js b/build/test-interface.min.js
diff --git a/build/test.min.js b/build/test.min.js
diff --git a/lib/index.js b/lib/index.js
@@ -4,6 +4,10 @@ import camelize from '../vendor/camelize';
 const supportsClasslist = "classList" in document.createElement("_");
 const storageKey = 'ab-tests';
 
+function getParameterByName(name, url) {
+    if (!url) { url = window.location.href; } name = name.replace(/[\[\]]/g, "\\$&"); var regex = new RegExp("[?&]" + name + "(=([^&#]*)|&|#|$)"), results = regex.exec(url); if (!results) return null; if (!results[2]) return ''; return decodeURIComponent(results[2].replace(/\+/g, " "));
+}
+
 class Test {
   constructor(name, data = {}, options = {}) {
     options = {
@@ -52,8 +56,20 @@ class Test {
         weights.push( data[names[i]].weight );
       }
 
+      // Grab assignment via query param. Syntax:
+      // ?assign=test:bucket
+      const [assignTest, assignBucket]  = (getParameterByName('assign') || '').split(':');
+      const assignmentMatchesName = assignTest === name;
+      const isValidBucket = assignBucket in data;
+
+      // Use query param assignment if possible
+      if (assignmentMatchesName && isValidBucket) {
+        bucket = assignBucket
+
       // Select a random weighted bucket
-      bucket = Test.chooseWeightedItem(names, weights);
+      } else {
+        bucket = Test.chooseWeightedItem(names, weights);
+      }
 
       // Save
       tests[name] = {

diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ab-tester",
-  "version": "0.5.0",
+  "version": "1.0.0",
   "homepage": "https://github.com/dollarshaveclub/ab-tester.js",
   "main": "./index.js",
   "repository": {