jsepgen/test.js

Tiny module to generate code from the jsep AST

/**
 * Module Dependencies
 */

var assert = require('assert')
var jsep = require('jsep')
var gen = require('./')

jsep.addBinaryOp('^', 10);

describe('jsepgen', function() {

  it('should support rewriting parts of the tree', function() {
    var expr = gen(jsep('Math.round((A ^ B ^ C + 5) + 10 ^ 5'), function(node) {
      if (node.type == 'BinaryExpression' && node.operator == '^') {
        var e = jsep('Math.pow()');
        e.arguments = [node.left, node.right];
        return e;
      }
    })

    assert.equal('Math.round(((Math.pow(Math.pow(A, B), C) + 5) + Math.pow(10, 5)))', expr);
  })

  it('should correctly distinguish object and array property syntax', function() {
    var expr = gen(jsep('arr[0]'))
    assert.equal('arr[0]', expr)

    expr = gen(jsep('obj["hi"]'))
    assert.equal('obj["hi"]', expr)

    expr = gen(jsep('obj.hi'))
    assert.equal('obj.hi', expr)
  })

  it('should understand arrays', function() {
    var expr = gen(jsep('[0, "a", [1, c]]'))
    assert.equal(expr, '[0,"a",[1,c]]')

  })

})