Cleanup (#19)

- Moving from 'es' build to more standard 'esm' build
- Moving from mocha and sinon to jest
- Removing automated code coverage for simplicity (can just use jest for now)
- Upgrading to latest flow
- Upgrading to latest for all dependencies

.babelrc

@@ -1,3 +1,22 @@
 {
-  "presets": ["./.babelrc.js"]
-}
+  "presets": [
+    "flow",
+    ["env", { "modules": false, "loose": true }]
+  ],
+  "comments": false,
+  "plugins": [
+    "transform-object-rest-spread"
+  ],
+  "env": {
+    "cjs": {
+      "plugins": [
+        "transform-es2015-modules-commonjs"
+      ]
+    },
+    "test": {
+      "plugins": [
+        "transform-es2015-modules-commonjs"
+      ]
+    }
+  }
+}

.browserlistrc

@@ -0,0 +1,8 @@
+ie >= 11
+last 1 Edge version
+last 1 Firefox version
+last 1 Chrome version
+last 1 Safari version
+last 1 iOS version
+last 1 Android version
+last 1 ChromeAndroid version

.eslintrc

@@ -5,12 +5,14 @@
   ],
   "parser": "babel-eslint",
   "plugins": [
+    "jest",
     "flowtype"
   ],
   "env": {
     "node": true,
     "browser": true,
-    "es6": true
+    "es6": true,
+    "jest/globals": true
   },
   // custom rules
   "rules": {
@@ -136,6 +138,8 @@
     "indent": [
       "error",
       2
-    ]
+    ],
+    // Require // @flow at the top of files
+    "flowtype/require-valid-file-annotation": ["error", "always", { "annotationStyle": "line" }]
   }
 }

.flowconfig

@@ -1,15 +1,5 @@
-[ignore]
-
-[include]
-
-[libs]
-
 [options]
 
-# Opting in to 'Strict Checking of Function Call Arity'
-# https://flow.org/blog/2017/05/07/Strict-Function-Call-Arity/
-experimental.strict_call_arity=true
-
 # Provides a way to suppress flow errors in the following line.
-# Example: // $FlowFixMe: This following line is borked because of reasons.
-suppress_comment= \\(.\\|\n\\)*\\$FlowFixMe
+suppress_comment= \\(.\\|\n\\)*\\$FlowFixMe
+suppress_comment= \\(.\\|\n\\)*\\$ExpectEror

.gitignore

@@ -10,7 +10,8 @@ node_modules/
 
 # generated files
 lib/
-es/
-.nyc_output/
-coverage.lcov
-coverage/
+esm/
+
+# editors
+.idea
+.vscode

.travis.yml

@@ -1,8 +1,7 @@
 language: node_js
 cache: yarn
 node_js:
-  - "6.9"
+  - '8.4'
 script:
-  - "yarn run test"
-after_success:
-  - "yarn run coverage"
+  - yarn run validate
+  - yarn run test

README.md

@@ -2,7 +2,7 @@
 
 A memoization library which only remembers the latest invocation
 
-[![Build Status](https://travis-ci.org/alexreardon/memoize-one.svg?branch=master)](https://travis-ci.org/alexreardon/memoize-one) [![codecov](https://codecov.io/gh/alexreardon/memoize-one/branch/master/graph/badge.svg)](https://codecov.io/gh/alexreardon/memoize-one) [![dependencies](https://david-dm.org/alexreardon/memoize-one.svg)](https://david-dm.org/alexreardon/memoize-one) [![SemVer](https://img.shields.io/badge/SemVer-2.0.0-brightgreen.svg)](http://semver.org/spec/v2.0.0.html)
+[![Build Status](https://travis-ci.org/alexreardon/memoize-one.svg?branch=master)](https://travis-ci.org/alexreardon/memoize-one) [![dependencies](https://david-dm.org/alexreardon/memoize-one.svg)](https://david-dm.org/alexreardon/memoize-one) [![SemVer](https://img.shields.io/badge/SemVer-2.0.0-brightgreen.svg)](http://semver.org/spec/v2.0.0.html)
 
 ## Rationale
 
@@ -45,6 +45,7 @@ memoizedAdd(1, 2); // 3
 [Play with this example](http://www.webpackbin.com/NkCiYkz_M)
 
 ### Custom equality function
+
 You can also pass in a custom function for checking the equality of two items.
 
 ```js
@@ -66,15 +67,48 @@ const result4 = customMemoization({foo: 'bar'});
 
 result3 === result4 // true - arguments are deep equal
 ```
+
 [Play with this example](http://www.webpackbin.com/NJW-tJMdf)
 
-#### Type signature
+#### Equality function type signature
+
 Here is the expected [flow](http://flowtype.org) type signature for a custom equality function:
 
 ```js
 type EqualityFn = (a: any, b: any) => boolean;
 ```
 
+### Dynamic properties
+
+The result function will have the same [`.length` property](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/length) as the provided function.
+
+```js
+const add = (a, b) => a + b;
+const memoizedAdd = memoizeOne(add);
+
+memoizedAdd.length === 2; // true
+```
+
+- For debug purposes we add a [`.name` property](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/name) to the result function. If provided function has a name then the name will be `memoized_${yourFunction.name}`. Otherwise it will be `memoized_fn`. This assists in debugging memoized functions.
+
+```js
+// function has a name
+const add = (a, b) => a + b;
+
+// the original name is 'add'
+add.name === 'add'; // true
+
+// our new memoizedAdd function has a prefixed name
+const memoizedAdd = memoizeOne(add);
+memoizedAdd.name === 'memoized_add'; // true
+```
+
+```js
+// function does not have a name
+const memoizedInline = memoizeOne((a, b) => a + b);
+memoizedInline.name === 'memoized_fn';
+```
+
 ## Installation
 
 ```bash
@@ -141,12 +175,15 @@ Generally this will be of no impact if you are not explicity controlling the `th
 ## Performance :rocket:
 
 ### Tiny
+
 `memoizeOne` is super lightweight at `457 bytes` minified and `299 bytes` gzipped. (`1kb` = `1000 bytes`)
 
 ### Extremely fast
+
 `memoizeOne` performs better or on par with than other popular memoization libraries for the purpose of remembering the latest invocation.
 
 **Results**
+
 - [simple arguments](https://www.measurethat.net/Benchmarks/ShowResult/4452)
 - [complex arguments](https://www.measurethat.net/Benchmarks/ShowResult/4488)
 
@@ -155,7 +192,7 @@ The comparisions are not exhaustive and are primiarly to show that `memoizeOne`
 ## Code health :thumbsup:
 
 - Tested with all built in [JavaScript types](https://github.com/getify/You-Dont-Know-JS/blob/master/types%20%26%20grammar/ch1.md).
-- [100% code coverage](https://codecov.io/gh/alexreardon/memoize-one).
+- 100% code coverage
 - [Continuous integration](https://travis-ci.org/alexreardon/memoize-one) to run tests and type checks.
 - [`Flow` types](http://flowtype.org) for safer internal execution and external consumption. Also allows for editor autocompletion.
 - Follows [Semantic versioning (2.0)](http://semver.org/) for safer consumption.

flow-typed/npm/babel-cli_vx.x.x.js

@@ -0,0 +1,108 @@
+// flow-typed signature: d8044ea585ac81bc8bde751918bbb405
+// flow-typed version: <<STUB>>/babel-cli_v6.26.0/flow_v0.68.0
+
+/**
+ * This is an autogenerated libdef stub for:
+ *
+ *   'babel-cli'
+ *
+ * Fill this stub out by replacing all the `any` types.
+ *
+ * Once filled out, we encourage you to share your work with the
+ * community by sending a pull request to:
+ * https://github.com/flowtype/flow-typed
+ */
+
+declare module 'babel-cli' {
+  declare module.exports: any;
+}
+
+/**
+ * We include stubs for each file inside this npm package in case you need to
+ * require those files directly. Feel free to delete any files that aren't
+ * needed.
+ */
+declare module 'babel-cli/bin/babel-doctor' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/bin/babel-external-helpers' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/bin/babel-node' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/bin/babel' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/_babel-node' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel-external-helpers' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel-node' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel/dir' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel/file' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel/index' {
+  declare module.exports: any;
+}
+
+declare module 'babel-cli/lib/babel/util' {
+  declare module.exports: any;
+}
+
+// Filename aliases
+declare module 'babel-cli/bin/babel-doctor.js' {
+  declare module.exports: $Exports<'babel-cli/bin/babel-doctor'>;
+}
+declare module 'babel-cli/bin/babel-external-helpers.js' {
+  declare module.exports: $Exports<'babel-cli/bin/babel-external-helpers'>;
+}
+declare module 'babel-cli/bin/babel-node.js' {
+  declare module.exports: $Exports<'babel-cli/bin/babel-node'>;
+}
+declare module 'babel-cli/bin/babel.js' {
+  declare module.exports: $Exports<'babel-cli/bin/babel'>;
+}
+declare module 'babel-cli/index' {
+  declare module.exports: $Exports<'babel-cli'>;
+}
+declare module 'babel-cli/index.js' {
+  declare module.exports: $Exports<'babel-cli'>;
+}
+declare module 'babel-cli/lib/_babel-node.js' {
+  declare module.exports: $Exports<'babel-cli/lib/_babel-node'>;
+}
+declare module 'babel-cli/lib/babel-external-helpers.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel-external-helpers'>;
+}
+declare module 'babel-cli/lib/babel-node.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel-node'>;
+}
+declare module 'babel-cli/lib/babel/dir.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel/dir'>;
+}
+declare module 'babel-cli/lib/babel/file.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel/file'>;
+}
+declare module 'babel-cli/lib/babel/index.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel/index'>;
+}
+declare module 'babel-cli/lib/babel/util.js' {
+  declare module.exports: $Exports<'babel-cli/lib/babel/util'>;
+}