CHANGELOG.md
### [1.3.1](https://github.com/power-assert-js/empower/releases/tag/v1.3.1) (2018-09-08)
#### Bug Fixes
* [to work well with Jest, treat power-assert message as "not generated" to avoid message override](https://github.com/power-assert-js/empower/pull/29)
## [1.3.0](https://github.com/power-assert-js/empower/releases/tag/v1.3.0) (2018-06-12)
#### Features
* set stackStartFunction to self if undefined ([8d734cf1](https://github.com/power-assert-js/empower/commit/8d734cf1d501b868b4cd65d34b382a8f7170018d))
#### Chore
* update empower-core to 1.2.0, nothing has changed but has integrated into power-assert-runtime monorepo. ([1a3d2f66](1a3d2f666732e66fd6d1cd5419ce671a4d46e25a))
### [1.2.3](https://github.com/power-assert-js/empower/releases/tag/v1.2.3) (2017-06-09)
#### Bug Fixes
* [Re-instantiate AssertionError under Node v8 (and v7)](https://github.com/power-assert-js/empower/pull/26)
### [1.2.2](https://github.com/power-assert-js/empower/releases/tag/v1.2.2) (2017-06-03)
#### Bug Fixes
* [dealing with `err.name` on Node v8](https://github.com/power-assert-js/empower/pull/25)
### [1.2.1](https://github.com/power-assert-js/empower/releases/tag/v1.2.1) (2016-06-05)
* remove xtend from dependencies ([366f5c9](https://github.com/power-assert-js/empower/commit/366f5c909151ddce59f22999987717a7e2626d31))
* update empower-core to 0.6.1 ([9194fe8](https://github.com/power-assert-js/empower/commit/9194fe8d35906623934966e37a38a27ed4a23f1a))
## [1.2.0](https://github.com/power-assert-js/empower/releases/tag/v1.2.0) (2016-06-01)
#### Features
* [Extract core functionality to empower-core](https://github.com/power-assert-js/empower/pull/22)
## [1.1.0](https://github.com/power-assert-js/empower/releases/tag/v1.1.0) (2015-11-07)
#### Features
* [support async-await state flags](https://github.com/power-assert-js/empower/pull/17) (by [@jamestalmage](https://github.com/jamestalmage))
### [1.0.2](https://github.com/power-assert-js/empower/releases/tag/v1.0.2) (2015-10-22)
#### Bug Fixes
* [make `_capt` and `_expr` methods not enumerable](https://github.com/power-assert-js/empower/pull/16)
### [1.0.1](https://github.com/power-assert-js/empower/releases/tag/v1.0.1) (2015-09-08)
* apply licensify on build ([282259b](https://github.com/power-assert-js/empower/commit/282259b632333c62e02113e374baa76dd7cd2890))
## [1.0.0](https://github.com/power-assert-js/empower/releases/tag/v1.0.0) (2015-05-25)
#### Features
* transfer to power-assert-js organization ([0cd9a89a](https://github.com/power-assert-js/empower/commit/0cd9a89ad3964c863e7f448ba46d565735850539))
* support `deepStrictEqual` and `notDeepStrictEqual` ([bbaa9121](https://github.com/power-assert-js/empower/commit/bbaa91211bc7779a94934165b0d827ec89df6c5c))
* use ponyfills for older browsers ([efea6e17](https://github.com/power-assert-js/empower/commit/efea6e173e28922eae7342d7e9f1f832992a99fd))
## [0.11.0](https://github.com/power-assert-js/empower/releases/tag/v0.11.0) (2015-04-18)
#### Features
* **empower:**
* ship npm module with built bundle for browsers ([e9448d3b](https://github.com/power-assert-js/empower/commit/e9448d3bfd4b44e64810cb2d1e18d6a4e2c6ba4b))
## [0.10.0](https://github.com/power-assert-js/empower/releases/tag/v0.10.0) (2014-11-11)
* **empower:**
* update escallmatch ([f7a0d970](https://github.com/power-assert-js/empower/commit/f7a0d970333cdec25aacaf3880473da5ccec24de))
### 0.9.1 (2014-10-07)
#### Bug Fixes
* **empower:** power-assert output doesn't appear in Node 0.11.x ([53e882e0](https://github.com/power-assert-js/empower/commit/53e882e00ad3dd8b45f262ab14ac782ed582b954))
## 0.9.0 (2014-09-01)
## 0.8.0 (2014-08-12)
#### Features
* **empower:**
* [modularized by browserify](https://github.com/power-assert-js/empower/pull/12)
* use `escallmatch` module to describe target patterns ([533a21a0](https://github.com/power-assert-js/empower/commit/533a21a0374f23f5ca4e198c17d1e20f10d705fa))
* support assertion methods with three or more arguments ([d31dca86](https://github.com/power-assert-js/empower/commit/d31dca86de2b05ee88ca5df15579308368657d43))
* if not in patterns, do not empower assertion function itself ([1d73a756](https://github.com/power-assert-js/empower/commit/1d73a7560ef586a45a0a9259e57c143b3b60caaa))
* option `targetMethods` does not required any more ([8ffcc49f](https://github.com/power-assert-js/empower/commit/8ffcc49fcdb5523eb38e63a0e7cca34f752d9302))
* rename `saveContextOnFail` option to `saveContextOnRethrow` ([1f6133b2](https://github.com/power-assert-js/empower/commit/1f6133b24be672f32cfd3b66522a7d14ca5d22e1))
* rename `modifyMessageOnFail` option to `modifyMessageOnRethrow` ([0c8a88f0](https://github.com/power-assert-js/empower/commit/0c8a88f0592917ba15ac0c1bf21c8f39f39ab350))
#### Breaking Changes
* `saveContextOnFail` option is renamed to `saveContextOnRethrow`
There is nothing to change unless you are using `saveContextOnFail` option.
If you are using `saveContextOnFail` option, change your code from the following:
`empower(originalAssert, formatter, {saveContextOnFail: true})`
To:
`empower(originalAssert, formatter, {saveContextOnRethrow: true})`
([1f6133b2](https://github.com/power-assert-js/empower/commit/1f6133b24be672f32cfd3b66522a7d14ca5d22e1))
* `modifyMessageOnFail` option is renamed to `modifyMessageOnRethrow`
There is nothing to change unless you are using `modifyMessageOnFail` option.
If you are using `modifyMessageOnFail` option, change your code from the following:
`empower(originalAssert, formatter, {modifyMessageOnFail: true})`
To:
`empower(originalAssert, formatter, {modifyMessageOnRethrow: true})`
([0c8a88f0](https://github.com/power-assert-js/empower/commit/0c8a88f0592917ba15ac0c1bf21c8f39f39ab350))
* option `targetMethods` does not required any more
If you already customize enhancement pattern using `targetMethods`, you need to migarte. To migrate, change your code from the following:
```javascript
var yourAssert = require('./your-assert');
var empower = require('empower');
var formatter = require('power-assert-formatter')();
var options = {
targetMethods: {
oneArg: [
'okay'
],
twoArgs: [
'equal',
'customEqual'
]
}
};
var assert = empower(yourAssert, formatter, options);
```
To:
```javascript
var yourAssert = require('./your-assert');
var empower = require('empower');
var formatter = require('power-assert-formatter')();
var options = {
patterns: [
'yourAssert(value, [message])',
'yourAssert.okay(value, [message])',
'yourAssert.equal(actual, expected, [message])',
'yourAssert.customEqual(actual, expected, [message])'
]
};
var assert = empower(yourAssert, formatter, options);
```
([8ffcc49f](https://github.com/power-assert-js/empower/commit/8ffcc49fcdb5523eb38e63a0e7cca34f752d9302))