slightly more coherent organization of concerns

2026-04-23 00:00:09 +08:00 · 2011-08-19 21:50:46 -07:00
parent 9ad78a50f7
commit 7bf8c617c3
67 changed files with 6 additions and 9 deletions
@@ -0,0 +1,316 @@
+/**
+ * This file is based on the node.js assert module, but with some small
+ * changes for browser-compatibility
+ * THIS FILE SHOULD BE BROWSER-COMPATIBLE JS!
+ */
+
+
+/**
+ * Added for browser compatibility
+ */
+
+var _keys = function(obj){
+    if(Object.keys) return Object.keys(obj);
+    var keys = [];
+    for(var k in obj){
+        if(obj.hasOwnProperty(k)) keys.push(k);
+    }
+    return keys;
+};
+
+
+
+// http://wiki.commonjs.org/wiki/Unit_Testing/1.0
+//
+// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
+//
+// Originally from narwhal.js (http://narwhaljs.org)
+// Copyright (c) 2009 Thomas Robinson <280north.com>
+//
+// 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 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 pSlice = Array.prototype.slice;
+
+// 1. The assert module provides functions that throw
+// AssertionError's when particular conditions are not met. The
+// assert module must conform to the following interface.
+
+var assert = exports;
+
+// 2. The AssertionError is defined in assert.
+// new assert.AssertionError({message: message, actual: actual, expected: expected})
+
+assert.AssertionError = function AssertionError (options) {
+  this.name = "AssertionError";
+  this.message = options.message;
+  this.actual = options.actual;
+  this.expected = options.expected;
+  this.operator = options.operator;
+  var stackStartFunction = options.stackStartFunction || fail;
+
+  if (Error.captureStackTrace) {
+    Error.captureStackTrace(this, stackStartFunction);
+  }
+};
+// code from util.inherits in node
+assert.AssertionError.super_ = Error;
+
+
+// EDITED FOR BROWSER COMPATIBILITY: replaced Object.create call
+// TODO: test what effect this may have
+var ctor = function () { this.constructor = assert.AssertionError; };
+ctor.prototype = Error.prototype;
+assert.AssertionError.prototype = new ctor();
+
+
+assert.AssertionError.prototype.toString = function() {
+  if (this.message) {
+    return [this.name+":", this.message].join(' ');
+  } else {
+    return [ this.name+":"
+           , JSON.stringify(this.expected )
+           , this.operator
+           , JSON.stringify(this.actual)
+           ].join(" ");
+  }
+};
+
+// assert.AssertionError instanceof Error
+
+assert.AssertionError.__proto__ = Error.prototype;
+
+// At present only the three keys mentioned above are used and
+// understood by the spec. Implementations or sub modules can pass
+// other keys to the AssertionError's constructor - they will be
+// ignored.
+
+// 3. All of the following functions must throw an AssertionError
+// when a corresponding condition is not met, with a message that
+// may be undefined if not provided.  All assertion methods provide
+// both the actual and expected values to the assertion error for
+// display purposes.
+
+function fail(actual, expected, message, operator, stackStartFunction) {
+  throw new assert.AssertionError({
+    message: message,
+    actual: actual,
+    expected: expected,
+    operator: operator,
+    stackStartFunction: stackStartFunction
+  });
+}
+
+// EXTENSION! allows for well behaved errors defined elsewhere.
+assert.fail = fail;
+
+// 4. Pure assertion tests whether a value is truthy, as determined
+// by !!guard.
+// assert.ok(guard, message_opt);
+// This statement is equivalent to assert.equal(true, guard,
+// message_opt);. To test strictly for the value true, use
+// assert.strictEqual(true, guard, message_opt);.
+
+assert.ok = function ok(value, message) {
+  if (!!!value) fail(value, true, message, "==", assert.ok);
+};
+
+// 5. The equality assertion tests shallow, coercive equality with
+// ==.
+// assert.equal(actual, expected, message_opt);
+
+assert.equal = function equal(actual, expected, message) {
+  if (actual != expected) fail(actual, expected, message, "==", assert.equal);
+};
+
+// 6. The non-equality assertion tests for whether two objects are not equal
+// with != assert.notEqual(actual, expected, message_opt);
+
+assert.notEqual = function notEqual(actual, expected, message) {
+  if (actual == expected) {
+    fail(actual, expected, message, "!=", assert.notEqual);
+  }
+};
+
+// 7. The equivalence assertion tests a deep equality relation.
+// assert.deepEqual(actual, expected, message_opt);
+
+assert.deepEqual = function deepEqual(actual, expected, message) {
+  if (!_deepEqual(actual, expected)) {
+    fail(actual, expected, message, "deepEqual", assert.deepEqual);
+  }
+};
+
+function _deepEqual(actual, expected) {
+  // 7.1. All identical values are equivalent, as determined by ===.
+  if (actual === expected) {
+    return true;
+  // 7.2. If the expected value is a Date object, the actual value is
+  // equivalent if it is also a Date object that refers to the same time.
+  } else if (actual instanceof Date && expected instanceof Date) {
+    return actual.getTime() === expected.getTime();
+
+  // 7.3. Other pairs that do not both pass typeof value == "object",
+  // equivalence is determined by ==.
+  } else if (typeof actual != 'object' && typeof expected != 'object') {
+    return actual == expected;
+
+  // 7.4. For all other Object pairs, including Array objects, equivalence is
+  // determined by having the same number of owned properties (as verified
+  // with Object.prototype.hasOwnProperty.call), the same set of keys
+  // (although not necessarily the same order), equivalent values for every
+  // corresponding key, and an identical "prototype" property. Note: this
+  // accounts for both named and indexed properties on Arrays.
+  } else {
+    return objEquiv(actual, expected);
+  }
+}
+
+function isUndefinedOrNull (value) {
+  return value === null || value === undefined;
+}
+
+function isArguments (object) {
+  return Object.prototype.toString.call(object) == '[object Arguments]';
+}
+
+function objEquiv (a, b) {
+  if (isUndefinedOrNull(a) || isUndefinedOrNull(b))
+    return false;
+  // an identical "prototype" property.
+  if (a.prototype !== b.prototype) return false;
+  //~~~I've managed to break Object.keys through screwy arguments passing.
+  //   Converting to array solves the problem.
+  if (isArguments(a)) {
+    if (!isArguments(b)) {
+      return false;
+    }
+    a = pSlice.call(a);
+    b = pSlice.call(b);
+    return _deepEqual(a, b);
+  }
+  try{
+    var ka = _keys(a),
+      kb = _keys(b),
+      key, i;
+  } catch (e) {//happens when one is a string literal and the other isn't
+    return false;
+  }
+  // having the same number of owned properties (keys incorporates hasOwnProperty)
+  if (ka.length != kb.length)
+    return false;
+  //the same set of keys (although not necessarily the same order),
+  ka.sort();
+  kb.sort();
+  //~~~cheap key test
+  for (i = ka.length - 1; i >= 0; i--) {
+    if (ka[i] != kb[i])
+      return false;
+  }
+  //equivalent values for every corresponding key, and
+  //~~~possibly expensive deep test
+  for (i = ka.length - 1; i >= 0; i--) {
+    key = ka[i];
+    if (!_deepEqual(a[key], b[key] ))
+       return false;
+  }
+  return true;
+}
+
+// 8. The non-equivalence assertion tests for any deep inequality.
+// assert.notDeepEqual(actual, expected, message_opt);
+
+assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
+  if (_deepEqual(actual, expected)) {
+    fail(actual, expected, message, "notDeepEqual", assert.notDeepEqual);
+  }
+};
+
+// 9. The strict equality assertion tests strict equality, as determined by ===.
+// assert.strictEqual(actual, expected, message_opt);
+
+assert.strictEqual = function strictEqual(actual, expected, message) {
+  if (actual !== expected) {
+    fail(actual, expected, message, "===", assert.strictEqual);
+  }
+};
+
+// 10. The strict non-equality assertion tests for strict inequality, as determined by !==.
+// assert.notStrictEqual(actual, expected, message_opt);
+
+assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
+  if (actual === expected) {
+    fail(actual, expected, message, "!==", assert.notStrictEqual);
+  }
+};
+
+function _throws (shouldThrow, block, err, message) {
+  var exception = null,
+      threw = false,
+      typematters = true;
+
+  message = message || "";
+
+  //handle optional arguments
+  if (arguments.length == 3) {
+    if (typeof(err) == "string") {
+      message = err;
+      typematters = false;
+    }
+  } else if (arguments.length == 2) {
+    typematters = false;
+  }
+
+  try {
+    block();
+  } catch (e) {
+    threw = true;
+    exception = e;
+  }
+
+  if (shouldThrow && !threw) {
+    fail( "Missing expected exception"
+        + (err && err.name ? " ("+err.name+")." : '.')
+        + (message ? " " + message : "")
+        );
+  }
+  if (!shouldThrow && threw && typematters && exception instanceof err) {
+    fail( "Got unwanted exception"
+        + (err && err.name ? " ("+err.name+")." : '.')
+        + (message ? " " + message : "")
+        );
+  }
+  if ((shouldThrow && threw && typematters && !(exception instanceof err)) ||
+      (!shouldThrow && threw)) {
+    throw exception;
+  }
+};
+
+// 11. Expected to throw an error:
+// assert.throws(block, Error_opt, message_opt);
+
+assert.throws = function(block, /*optional*/error, /*optional*/message) {
+  _throws.apply(this, [true].concat(pSlice.call(arguments)));
+};
+
+// EXTENSION! This is annoying to write outside this module.
+assert.doesNotThrow = function(block, /*optional*/error, /*optional*/message) {
+  _throws.apply(this, [false].concat(pSlice.call(arguments)));
+};
+
+assert.ifError = function (err) { if (err) {throw err;}};