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power-assert-formatter

Power Assert output formatter

power-assert-formatter

Power Assert output formatter.

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.

See CHANGELOG

return type
function

Returns creator function for power-assert.

return type
function

Create formatter function with options. options argument is optional.

type default value
object (return value of createFormatter.defaultOptions())

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

type default value
number 5

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.

type default value
number 1

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#].

type default value
number 2

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

type default value
string "Object"

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

type default value
string "#@Circular#"

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

type default value
string "\n"

Line separator in power assert output.

type default value
number 2

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.

type default value
function string-width.js

Function to calculate width of string.

type default value
function stringifier module

Function to stringify any target value.

type default value
function udiff.js

Function to create diff string between two strings.

type default value
function string-writer.js

Constructor Function for output writer class.

type default 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'
]

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'
    ]
};
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

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

powerAssertFormatter function is exported

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

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>

Licensed under the MIT license.