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+# assert
+
+[![Build Status](https://travis-ci.org/defunctzombie/commonjs-assert.svg?branch=master)](https://travis-ci.org/defunctzombie/commonjs-assert)
+
+This module is used for writing unit tests for your applications, you can access it with require('assert').
+
+The API is derived from the [commonjs 1.0 unit testing](http://wiki.commonjs.org/wiki/Unit_Testing/1.0) spec and the [node.js assert module](http://nodejs.org/api/assert.html)
+
+## assert.fail(actual, expected, message, operator)
+Throws an exception that displays the values for actual and expected separated by the provided operator.
+
+## assert(value, message), assert.ok(value, [message])
+Tests if value is truthy, it is equivalent to assert.equal(true, !!value, message);
+
+## assert.equal(actual, expected, [message])
+Tests shallow, coercive equality with the equal comparison operator ( == ).
+
+## assert.notEqual(actual, expected, [message])
+Tests shallow, coercive non-equality with the not equal comparison operator ( != ).
+
+## assert.deepEqual(actual, expected, [message])
+Tests for deep equality.
+
+## assert.notDeepEqual(actual, expected, [message])
+Tests for any deep inequality.
+
+## assert.strictEqual(actual, expected, [message])
+Tests strict equality, as determined by the strict equality operator ( === )
+
+## assert.notStrictEqual(actual, expected, [message])
+Tests strict non-equality, as determined by the strict not equal operator ( !== )
+
+## assert.throws(block, [error], [message])
+Expects block to throw an error. error can be constructor, regexp or validation function.
+
+Validate instanceof using constructor:
+
+```javascript
+assert.throws(function() { throw new Error("Wrong value"); }, Error);
+```
+
+Validate error message using RegExp:
+
+```javascript
+assert.throws(function() { throw new Error("Wrong value"); }, /value/);
+```
+
+Custom error validation:
+
+```javascript
+assert.throws(function() {
+    throw new Error("Wrong value");
+}, function(err) {
+    if ( (err instanceof Error) && /value/.test(err) ) {
+        return true;
+    }
+}, "unexpected error");
+```
+
+## assert.doesNotThrow(block, [message])
+Expects block not to throw an error, see assert.throws for details.
+
+## assert.ifError(value)
+Tests if value is not a false value, throws if it is a true value. Useful when testing the first argument, error in callbacks.