chore: Add Azure Pipelines for CI (Windows, Linux, Mac) (#1630), Fix async function serialization in Safari.

* Add azure pipelines CI.

* Publish test results.

* Enable coveralls

* Use Safari  for OSX browser tests.

* Adding missing lib files to karma (only Safari complained).

* Rename with dot so it gets better placed in order.

* Use ci instead of install, so we stick with package-lock.json

* Use npm test instead of mocha directly. It just needed a double -- escape.

* Move DISPLAY to Linux only, with value set just once.

* Use variables for DISPLAY, browser tests and coveralls.

* Simplify steps with a browser name variable.

* Run junit reporter on CI only.

* DISPLAY should be already an environment variable.

* Use vmImage for consistency with other OS.

* Don't use verbose npm@1 task.

* No need to setTimeout, let's `done` on the callback.

* Don't resume twice.
Check queue length on callback for safety, setTimeout may be delayed.

* Avoid time dependency, act on events instead.

* Avoid dependency on timing to final assertion.

* Rewrite test to avoid setTimeout

* Fix formatting.

* Make diff more significant (125+50 ~= 200)

* Make diff more significant to avoid race conditions.

* Wait a bit more so default 5 retries did happen.

* Make delays shorter to avoid "Timeout of 250ms exceeded"

* Shorten delay to avoid 200ms test timeout in browser tests.

* Shorten timeout to mitigate 200ms test timeout.

* Add more diff on delays to enforce test behavior.

* Make delays more significant to avoid race conditions.

* Stop using setTimeout and rely on events to push new items, so order is enforced.

* Fix async function serialization in Safari.

* Add more delay so 4 never completes before 3.

* Ensure 3 never completes before 4.

* Use drain instead of task count.
Trying to ensure done is called from Windows browser tests that fail frequently.

* Ensure 2 starts before 3 arrives.Avoid expected 'process 2 3' to equal 'process 2'

* Add retries to browser tests.

* Don't fail all on Mac & Windows browser tests.

* Ensure 3 happens before 2, it fails sparely on OSX.
AssertionError: expected [ 1, 2, 3 ] to deeply equal [ 1, 3, 2 ]

* Avoid unnecessary multilines.

* Use Edge for Windows browser tests.

2 files changed, 8 insertions, 4 deletions

diff --git a/test/es2017/asyncFunctions.js b/test/es2017/asyncFunctions.js
index 59c0df8..efb6555 100644
--- a/test/es2017/asyncFunctions.js
+++ b/test/es2017/asyncFunctions.js
@@ -9,6 +9,8 @@ module.exports = function () {
         return res;
     }
 
+    this.retries(3);
+
     const input = [1, 2, 3];
     const inputObj = {a: 1, b: 2, c: 3};
 
@@ -303,8 +305,8 @@ module.exports = function () {
     /* eslint prefer-arrow-callback: 0, object-shorthand: 0 */
     it('should handle async functions in autoInject', (done) => {
         async.autoInject({
-            z: async function(){ return 0},
-            a: async function a () {
+            z: async function () { return 0 },
+            a: async function () {
                 return await Promise.resolve(1);
             },
             b: async function (a) {
@@ -676,7 +678,7 @@ module.exports = function () {
         var fn = async.timeout(async (val) => {
             await new Promise((resolve) => setTimeout(resolve, 100));
             return val;
-        }, 50);
+        }, 20);
         fn(1, (err) => {
             expect(err.message).to.match(/timed out/);
             done();
diff --git a/test/es2017/asyncGenerators.js b/test/es2017/asyncGenerators.js
index c9be07e..61ac964 100644
--- a/test/es2017/asyncGenerators.js
+++ b/test/es2017/asyncGenerators.js
@@ -26,12 +26,14 @@ module.exports = function () {
         }
     }
 
+    this.retries(3);
+
     it('should handle async generators in each', (done) => {
         const calls = []
         async.each(range(5),
             async (val) => {
                 calls.push(val)
-                await delay(5)
+                await delay(1)
             }, (err) => {
                 if (err) throw err
                 expect(calls).to.eql([0, 1, 2, 3, 4])