power-assert-context-traversal

EventEmitter of powerAssertContext object provided by power-assert at runtime.

API

var traversal = new ContextTraversal(powerAssertContext);

Create EventEmitter of powerAssertContext object, having structure below.

{
    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.

{
    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
};

{
    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

$ npm install --save-dev power-assert-context-traversal

AUTHOR

• Takuto Wada

LICENSE

Licensed under the MIT license.