Merge pull request #1365 from alFReD-NSH/try

Add async.tryEach

1 files changed, 86 insertions, 0 deletions

diff --git a/mocha_test/tryEach.js b/mocha_test/tryEach.js
new file mode 100644
index 0000000..5e997a6
--- /dev/null
+++ b/mocha_test/tryEach.js
@@ -0,0 +1,86 @@
+var async = require('../lib');
+var expect = require('chai').expect;
+var assert = require('assert');
+
+describe('try', function () {
+    it('no callback', function () {
+        async.tryEach([]);
+    });
+    it('empty', function (done) {
+        async.tryEach([], function (err, results) {
+            expect(err).to.equal(null);
+            expect(results).to.eql(undefined);
+            done();
+        });
+    });
+    it('one task, multiple results', function (done) {
+        var RESULTS = ['something', 'something2'];
+        async.tryEach([
+            function (callback) {
+                callback(null, RESULTS[0], RESULTS[1]);
+            }
+        ], function (err, results) {
+            expect(err).to.equal(null);
+            expect(results).to.eql(RESULTS);
+            done();
+        });
+    });
+    it('one task', function (done) {
+        var RESULT = 'something';
+        async.tryEach([
+            function (callback) {
+                callback(null, RESULT);
+            }
+        ], function (err, results) {
+            expect(err).to.equal(null);
+            expect(results).to.eql(RESULT);
+            done();
+        });
+    });
+    it('two tasks, one failing', function (done) {
+        var RESULT = 'something';
+        async.tryEach([
+            function (callback) {
+                callback(new Error('Failure'), {});
+            },
+            function (callback) {
+                callback(null, RESULT);
+            }
+        ], function (err, results) {
+            expect(err).to.equal(null);
+            expect(results).to.eql(RESULT);
+            done();
+        });
+    });
+    it('two tasks, both failing', function (done) {
+        var ERROR_RESULT = new Error('Failure2');
+        async.tryEach([
+            function (callback) {
+                callback(new Error('Should not stop here'));
+            },
+            function (callback) {
+                callback(ERROR_RESULT);
+            }
+        ], function (err, results) {
+            expect(err).to.equal(ERROR_RESULT);
+            expect(results).to.eql(undefined);
+            done();
+        });
+    });
+    it('two tasks, non failing', function (done) {
+        var RESULT = 'something';
+        async.tryEach([
+            function (callback) {
+                callback(null, RESULT);
+            },
+            function () {
+                assert.fail('Should not been called');
+            },
+        ], function (err, results) {
+            expect(err).to.equal(null);
+            expect(results).to.eql(RESULT);
+            done();
+        });
+    });
+});
+