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website/functions/node_modules/power-assert-context-traversal/README.md

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+[![power-assert][power-assert-banner]][power-assert-url]
+
+[![Build Status][travis-image]][travis-url]
+[![NPM version][npm-image]][npm-url]
+[![License][license-image]][license-url]
+
+
+EventEmitter of `powerAssertContext` object provided by power-assert at runtime.
+
+
+API
+---------------------------------------
+
+### var traversal = new ContextTraversal(powerAssertContext);
+
+Create `EventEmitter` of `powerAssertContext` object, having structure below.
+
+```javascript
+{
+    source: {
+        content: 'assert(foo === bar)',
+        filepath: 'test/some_test.js',
+        line: 1,
+        ast: '### JSON representation of AST nodes ###',
+        tokens: '### JSON representation of AST tokens ###',
+        visitorKeys: '### JSON representation of AST visitor keys ###'
+    },
+    args: [
+        {
+            value: false,
+            events: [
+                {
+                    value: "FOO",
+                    espath: "arguments/0/left"
+                },
+                {
+                    value: "BAR",
+                    espath: "arguments/0/right"
+                },
+                {
+                    value: false,
+                    espath: "arguments/0"
+                }
+            ]
+        }
+    ]
+}
+```
+
+### traversal.traverse()
+
+Fire events while traversing AST tree in `powerAssertContext`.
+
+
+### events
+
+
+#### traversal.on('start', function (powerAssertContext) {})
+
+Called once when traversal starts. Argument is the `powerAssertContext` object under traversal.
+
+#### traversal.on('data', function (esNode) {})
+
+Called for each Node of AST in `powerAssertContext`. Argument is a `EsNode` object, having structure below.
+
+```javascript
+{
+    espath: 'arguments/0',
+    parent: '### parent esNode reference unless root ###',
+    key: 0,
+    node: {
+        type: 'BinaryExpression',
+        operator: '===',
+        left: { type: 'Identifier', name: 'foo', range: [ 7, 10 ] },
+        right: { type: 'Identifier', name: 'bar', range: [ 15, 18 ] },
+        range: [ 7, 18 ]
+    },
+    code: 'foo === bar',
+    value: false,
+    isCaptured: true,
+    range: [ 11, 14 ]  // range of operator
+};
+```
+
+```javascript
+{
+    espath: 'arguments/0/right',
+    parent: '### parent esNode reference unless root ###',
+    key: 'right',
+    node: { type: 'Identifier', name: 'bar', range: [ 15, 18 ] },
+    code: 'bar',
+    value: 'BAR',
+    isCaptured: true,
+    range: [ 15, 18 ]
+};
+```
+
+#### traversal.on('end', function () {})
+
+Called once when traversal ends.
+
+
+
+INSTALL
+---------------------------------------
+
+```sh
+$ npm install --save-dev power-assert-context-traversal
+```
+
+
+AUTHOR
+---------------------------------------
+* [Takuto Wada](https://github.com/twada)
+
+
+LICENSE
+---------------------------------------
+Licensed under the [MIT](https://github.com/twada/power-assert-runtime/blob/master/LICENSE) license.
+
+
+[power-assert-url]: https://github.com/power-assert-js/power-assert
+[power-assert-banner]: https://raw.githubusercontent.com/power-assert-js/power-assert-js-logo/master/banner/banner-official-fullcolor.png
+
+[travis-url]: https://travis-ci.org/twada/power-assert-runtime
+[travis-image]: https://secure.travis-ci.org/twada/power-assert-runtime.svg?branch=master
+
+[npm-url]: https://npmjs.org/package/power-assert-context-traversal
+[npm-image]: https://badge.fury.io/js/power-assert-context-traversal.svg
+
+[license-url]: https://github.com/twada/power-assert-runtime/blob/master/LICENSE
+[license-image]: https://img.shields.io/badge/license-MIT-brightgreen.svg