fix(test): cover label color selection and update

scripts/mocha-preload.js

@@ -1,10 +1,17 @@
 export const jsdom = require('jsdom-global')();
-const sourceMapSupport = require('source-map-support');
 
+const sourceMapSupport = require('source-map-support');
 sourceMapSupport.install({
   environment: 'node',
   handleUncaughtExceptions: true,
   hookRequire: true,
 });
 
+const chai = require('chai');
+const chaiPromise = require('chai-as-promised');
+const chaiSinon = require('sinon-chai');
+
+chai.use(chaiPromise);
+chai.use(chaiSinon);
+
 window.URL.createObjectURL = function () { };

test/sync/TestSyncLabels.ts

@@ -1,5 +1,54 @@
 import { expect } from 'chai';
+import { alea } from 'seedrandom';
+import { match, spy } from 'sinon';
+
+import { BunyanLogger } from '../../src/logger/bunyan';
+import { GithubRemote } from '../../src/remote/github';
+import { syncSingleLabel } from '../../src/sync';
 
 describe('label sync', () => {
   it('should sync each label');
+  it('should pick a stable random color for each label', async () => {
+    const logger = BunyanLogger.create({
+      name: 'test',
+    });
+    const remote = new GithubRemote({
+      data: {},
+      dryrun: true,
+      logger,
+      type: '',
+    });
+    const updateSpy = spy(remote, 'updateLabel');
+
+    await syncSingleLabel({
+      colors: [
+        'ff0000',
+      ],
+      flags: [{
+        adds: [],
+        name: 'foo',
+        priority: 1,
+        removes: [],
+        requires: [],
+      }],
+      logger,
+      project: '',
+      random: alea(),
+      remote,
+      states: [],
+    }, {
+      color: '',
+      desc: '',
+      name: 'foo',
+      project: '',
+    });
+
+    expect(updateSpy).to.have.callCount(1);
+
+    const COLOR_LENGTH = 6;
+    expect(updateSpy).to.have.been.calledWithMatch({
+      color: match.string.and(match((it) => it.length === COLOR_LENGTH)),
+      name: 'foo',
+    });
+  });
 });