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node_modules/events/tests/common.js

@@ -1,42 +1,104 @@
+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+var test = require('tape');
 var assert = require('assert');
 
+var noop = function() {};
+
 var mustCallChecks = [];
 
-function runCallChecks() {
-  var failed_count = 0;
-  for (var i=0 ; i< mustCallChecks.length; ++i) {
-    var context = mustCallChecks[i];
-    if (context.actual === context.expected) {
-      continue;
-    }
+function runCallChecks(exitCode) {
+  if (exitCode !== 0) return;
 
-    failed_count++;
-    console.log('Mismatched %s function calls. Expected %d, actual %d.',
-                context.name,
-                context.expected,
-                context.actual);
-    console.log(context.stack.split('\n').slice(2).join('\n'));
+  var failed = filter(mustCallChecks, function(context) {
+    if ('minimum' in context) {
+      context.messageSegment = 'at least ' + context.minimum;
+      return context.actual < context.minimum;
+    } else {
+      context.messageSegment = 'exactly ' + context.exact;
+      return context.actual !== context.exact;
+    }
+  });
+
+  for (var i = 0; i < failed.length; i++) {
+    var context = failed[i];
+    console.log('Mismatched %s function calls. Expected %s, actual %d.',
+        context.name,
+        context.messageSegment,
+        context.actual);
+    // IE8 has no .stack
+    if (context.stack) console.log(context.stack.split('\n').slice(2).join('\n'));
   }
 
-  assert(failed_count === 0);
+  assert.strictEqual(failed.length, 0);
 }
 
-after(runCallChecks);
+exports.mustCall = function(fn, exact) {
+  return _mustCallInner(fn, exact, 'exact');
+};
 
-exports.mustCall = function(fn, expected) {
-  if (typeof expected !== 'number') expected = 1;
+function _mustCallInner(fn, criteria, field) {
+  if (typeof criteria == 'undefined') criteria = 1;
+
+  if (typeof fn === 'number') {
+    criteria = fn;
+    fn = noop;
+  } else if (fn === undefined) {
+    fn = noop;
+  }
+
+  if (typeof criteria !== 'number')
+    throw new TypeError('Invalid ' + field + ' value: ' + criteria);
 
   var context = {
-    expected: expected,
     actual: 0,
-    stack: (new Error).stack,
+    stack: (new Error()).stack,
     name: fn.name || '<anonymous>'
   };
 
+  context[field] = criteria;
+
+  // add the exit listener only once to avoid listener leak warnings
+  if (mustCallChecks.length === 0) test.onFinish(function() { runCallChecks(0); });
+
   mustCallChecks.push(context);
 
   return function() {
     context.actual++;
     return fn.apply(this, arguments);
   };
+}
+
+exports.mustNotCall = function(msg) {
+  return function mustNotCall() {
+    assert.fail(msg || 'function should not have been called');
+  };
 };
+
+function filter(arr, fn) {
+  if (arr.filter) return arr.filter(fn);
+  var filtered = [];
+  for (var i = 0; i < arr.length; i++) {
+    if (fn(arr[i], i, arr)) filtered.push(arr[i]);
+  }
+  return filtered
+}