argosy-pattern

Test messages against Argosy patterns.

Part of the Argosy family.

example

var assert        = require('assert'),
    argosyPattern = require('argosy-pattern'),
    match         = require('argosy-pattern/match')
 
var pattern = argosyPattern({ hello: 'world', 'message.count': match.number })
 
var result = pattern.matches({
    hello: 'world',
    message: {
        count: 42
    }
})
 
assert(result)

api

var argosyPattern = require('argosy-pattern')

pattern = argosyPattern(object)

Create an Argosy pattern, given an object containing rules. Each key in the object represents a key that is to be validated in compared message objects. These keys will be tested to have the same literal value, matching regular expression, or to be of a given type using the matching system described below. Nested keys may be matched using the dot notation. For example, {'message.count':1} equates to {message: {count: 1}}.

pattern.matches(object)

Returns true of the given object matches the pattern, or false otherwise.

pattern.encode()

Returns an object, representing the pattern, suitable for serialization. This is used internally within Argosy.

matching

var match = require('argosy-pattern/match')

Argosy patterns support more than literal values. The values of the pattern keys may be any of the following in addition to literal values:

• A regular expression - values will be tested against the regular expression to determine a match
• match.number - matches any number
• match.string - matches any string
• match.bool - matches true or false
• match.array - matches any array
• match.object - matches any truthy object
• match.defined - matches anything other than undefined
• match.undefined - matches undefined or missing key

testing

npm test [--dot | --spec] [--grep=pattern]

Specifying --dot or --spec will change the output from the default TAP style. Specifying --grep will only run the test files that match the given pattern.

coverage

npm run coverage [--html]

This will output a textual coverage report. Including --html will also open an HTML coverage report in the default browser.