[node] Shuffle seed supportupstream/shuffle-seed

1 files changed, 27 insertions, 1 deletions

diff --git a/platform/node/test/render.test.js b/platform/node/test/render.test.js
index ce549c1e27..b4933ce59e 100644
--- a/platform/node/test/render.test.js
+++ b/platform/node/test/render.test.js
@@ -7,6 +7,19 @@ const ignores = require('./ignores.json');
 let tests;
 let shuffle = false;
 let recycleMap = false;
+let seed;
+
+// https://stackoverflow.com/a/1349426/229714
+function makeHash() {
+    const array = [];
+    const possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+
+    for (let i = 0; i < 10; ++i)
+        array.push(possible.charAt(Math.floor(Math.random() * possible.length)));
+
+    // join array elements without commas.
+    return array.join('');
+}
 
 function checkParameter(param) {
     const index = tests.indexOf(param);
@@ -16,10 +29,23 @@ function checkParameter(param) {
     return true;
 }
 
+function checkValueParameter(defaultValue, param) {
+    const index = tests.findIndex((elem) => { return String(elem).startsWith(param); });
+    if (index === -1)
+        return defaultValue;
+
+    const split = String(tests.splice(index, 1)).split('=');
+    if (split.length !== 2)
+        return defaultValue;
+
+    return split[1];
+}
+
 if (process.argv[1] === __filename && process.argv.length > 2) {
     tests = process.argv.slice(2).filter((value, index, self) => { return self.indexOf(value) === index; });
     shuffle = checkParameter('--shuffle');
+    seed = checkValueParameter(makeHash(), '--seed');
     recycleMap = checkParameter('--recycle-map');
 }
 
-suite.run('native', {tests, ignores, shuffle, recycleMap}, suiteImplementation);
+suite.run('native', { tests, ignores, shuffle, seed, recycleMap }, suiteImplementation);