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power-assert-formatter

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Power Assert output formatter.

DESCRIPTION

power-assert-formatter is a formatter module for Power Assert output.

Pull-requests, issue reports and patches are always welcomed. See power-assert project for more documentation.

CHANGELOG

See CHANGELOG

API

var createFormatter = require('power-assert-formatter');

return type
function

Returns creator function for power-assert.

var formatter = createFormatter([options]);

return type
function

Create formatter function with options. options argument is optional.

options

typedefault value
object(return value of createFormatter.defaultOptions())

Configuration options. If not passed, default options will be used.

options.lineDiffThreshold

typedefault value
number5

Threshold to show diff at character level or line level. If number of lines in target string is greater than lineDiffThreshold, then line diff mode will be used to show diff output.

options.maxDepth

typedefault value
number1

Depth of object traversal. If object depth is greater than maxDepth, compound object (IOW, Array or object) will be pruned with # like ["foo",#Array#,#Object#].

options.outputOffset

typedefault value
number2

Number of spaces inserted at the left in power-assert output.

options.anonymous

typedefault value
string"Object"

Type name to show when target object is created by anonymous constructor.

options.circular

typedefault value
string"#@Circular#"

Name to show when target object is detected as circular structure.

options.lineSeparator

typedefault value
string"\n"

Line separator in power assert output.

options.ambiguousEastAsianCharWidth

typedefault value
number2

Width of 'Ambiguous' characters defined in Unicode Standard Annex #11 EAST ASIAN WIDTH. Configure options.ambiguousEastAsianCharWidth to treat ambiguous east asian character as fullwidth (= 2) or narrow (= 1). Default is 2.

options.widthOf

typedefault value
functionstring-width.js

Function to calculate width of string.

options.stringify

typedefault value
functionstringifier module

Function to stringify any target value.

options.diff

typedefault value
functionudiff.js

Function to create diff string between two strings.

options.writerClass

typedefault value
functionstring-writer.js

Constructor Function for output writer class.

options.renderers

typedefault value
Array of (string or function )shown below
[
    './built-in/file',
    './built-in/assertion',
    './built-in/diagram',
    './built-in/binary-expression'
]

Output renderers. Power assert output is rendered by renderers in order. You can create custom renderer and add its constructor function to customize power-assert-output.

[
    './built-in/file',
    './built-in/assertion',
    YourCustomRenderer,
    './built-in/binary-expression'
]

var options = createFormatter.defaultOptions();

Returns default options object for createFormatter function. In other words, returns

{
    lineDiffThreshold: 5,
    maxDepth: 1,
    anonymous: 'Object',
    circular: '#@Circular#',
    lineSeparator: '\n',
    ambiguousEastAsianCharWidth: 2,
    renderers: [
        './built-in/file',
        './built-in/assertion',
        './built-in/diagram',
        './built-in/binary-expression'
    ]
};

var formattedText = formatter(powerAssertContext);

return type
string

Format powerAssertContext into formattedText. powerAssertContext is an internal object structure, containing informations to render. Example of powerAssertContext is:

{
    source: {
        content: "assert.equal(foo, bar)",
        filepath: "/path/to/some_test.js",
        line: 1
    },
    args: [
        {
            value: "foo",
            events: [
                {
                    value: "foo",
                    espath: "arguments/0"
                }
            ]
        },
        {
            value: "bar",
            events: [
                {
                    value: "bar",
                    espath: "arguments/1"
                }
            ]
        }
    ]
}

Note that structure of powerAssertContext may change.

INSTALL

via npm

Install

$ npm install --save-dev power-assert-formatter

use power-assert-formatter npm module on browser

powerAssertFormatter function is exported

<script type="text/javascript" src="./path/to/node_modules/power-assert-formatter/build/power-assert-formatter.js"></script>

via bower

Install

$ bower install --save-dev power-assert-formatter

Then load (powerAssertFormatter function is exported)

<script type="text/javascript" src="./path/to/bower_components/power-assert-formatter/build/power-assert-formatter.js"></script>

AUTHOR

CONTRIBUTORS

LICENSE

Licensed under the MIT license.