Script to detect whether a test file is written in QUnit or Jasmine

detect.js

// Script to detect whether a js unit test file is written in QUnit or Jasmine.
// Usage:
//     node detect.js <test file>

var parser = require('uglify-js').parser
  , fs = require('fs')
  , filename = process.argv[2]
  
var patterns = {
    jasmine: [
        function(node){
            return node[0] === 'call' &&
                node[1][0] === 'name' &&
                node[1][1] === 'describe' &&
                node[2][0][0] === 'string'
        },
        function(node){
            return node[0] === 'call' &&
                node[1][0] === 'name' &&
                node[1][1] === 'it' &&
                node[2][0][0] === 'string'
        },
        function(node){
            return node[0] === 'call' &&
                node[1][0] === 'name' &&
                node[1][1] === 'expect'
        }
    ],
    qunit: [
        function(node){
            return node[0] === 'call' &&
                node[1][0] === 'name' &&
                node[1][1] === 'test' &&
                node[2][0][0] === 'string'
        },
        function(node){
            return node[0] === 'call' &&
                node[1][0] === 'name' &&
                node[1][1] === 'ok'
        },
        function(node){
            return node[0] === 'call' &&
                node[1][0] === 'name' &&
                node[1][1] === 'equal'
        }
    ]
}

var tally = {
    jasmine: 0,
    qunit: 0
}
  
function parse(filename){
    var ast = parser.parse(String(fs.readFileSync(filename)))
    return ast
}

function patternMatches(node, test){
    try{
        return test(node)
    }catch(e){
        return false
    }
}

function detectPatterns(node){
    for (var framework in patterns){
        patterns[framework].forEach(function(test){
            if (patternMatches(node, test)){
                tally[framework]++
            }
        })
    }
}

function traverse(node, visit){
    visit(node)
    if (node instanceof Array){
        for (var i = 0, len = node.length; i < len; i++)
            traverse(node[i], visit)
    }
}

var ast = parse(filename)
traverse(ast, detectPatterns)
for (var key in tally){
    console.log(tally[key] + ' points for ' + key + '.')
}
console.log('Tests were written in ' + (tally.qunit > tally.jasmine ?
    'QUnit': 'Jasmine') + '.')