Add test case for very nested promises

Author: Forbes Lindesay

test/nested-promises.js

@@ -0,0 +1,67 @@
+'use strict';
+
+var assert = require('assert');
+var Promise = require('../');
+
+describe('nested promises', function () {
+  it('does not result in any wierd behaviour - 1', function (done) {
+    var resolveA, resolveB, resolveC;
+    var A = new Promise(function (resolve, reject) {
+      resolveA = resolve;
+    });
+    var B = new Promise(function (resolve, reject) {
+      resolveB = resolve;
+    });
+    var C = new Promise(function (resolve, reject) {
+      resolveC = resolve;
+    });
+    resolveA(B);
+    resolveB(C);
+    resolveC('foo');
+    A.done(function (result) {
+      assert(result === 'foo');
+      done();
+    });
+  });
+  it('does not result in any wierd behaviour - 2', function (done) {
+    var resolveA, resolveB, resolveC, resolveD;
+    var A = new Promise(function (resolve, reject) {
+      resolveA = resolve;
+    });
+    var B = new Promise(function (resolve, reject) {
+      resolveB = resolve;
+    });
+    var C = new Promise(function (resolve, reject) {
+      resolveC = resolve;
+    });
+    var D = new Promise(function (resolve, reject) {
+      resolveD = resolve;
+    });
+    var Athen = A.then, Bthen = B.then, Cthen = C.then, Dthen = D.then;
+    resolveA(B);
+    resolveB(C);
+    resolveC(D);
+    resolveD('foo');
+    A.done(function (result) {
+      assert(result === 'foo');
+      done();
+    });
+  });
+  it('does not result in any wierd behaviour - 2', function (done) {
+    var promises = [];
+    var resolveFns = [];
+    for (var i = 0; i < 100; i++) {
+      promises.push(new Promise(function (resolve) {
+        resolveFns.push(resolve);
+      }));
+    }
+    for (var i = 0; i < 99; i++) {
+      resolveFns[i](promises[i + 1]);
+    }
+    resolveFns[99]('foo');
+    promises[0].done(function (result) {
+      assert(result === 'foo');
+      done();
+    });
+  });
+});