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var R = require('../source');var eq = require('./shared/eq');var _isTransformer = require('../source/internal/_isTransformer');

describe('groupBy', function() {  it('splits the list into groups according to the grouping function', function() {    var grade = function(score) {      return (score < 65) ? 'F' : (score < 70) ? 'D' : (score < 80) ? 'C' : (score < 90) ? 'B' : 'A';    };    var students = [      {name: 'Abby', score: 84},      {name: 'Brad', score: 73},      {name: 'Chris', score: 89},      {name: 'Dianne', score: 99},      {name: 'Eddy', score: 58},      {name: 'Fred', score: 67},      {name: 'Gillian', score: 91},      {name: 'Hannah', score: 78},      {name: 'Irene', score: 85},      {name: 'Jack', score: 69}    ];    var byGrade = function(student) {return grade(student.score || 0);};    eq(R.groupBy(byGrade, students), {      A: [{name: 'Dianne', score: 99}, {name: 'Gillian', score: 91}],      B: [{name: 'Abby', score: 84}, {name: 'Chris', score: 89}, {name: 'Irene', score: 85}],      C: [{name: 'Brad', score: 73}, {name: 'Hannah', score: 78}],      D: [{name: 'Fred', score: 67}, {name: 'Jack', score: 69}],      F: [{name: 'Eddy', score: 58}]    });  });
  it('returns an empty object if given an empty array', function() {    eq(R.groupBy(R.prop('x'), []), {});  });
  it('dispatches on transformer objects in list position', function() {    var byType = R.prop('type');    var xf = {      '@@transducer/init': function() { return {}; },      '@@transducer/result': function(x) { return x; },      '@@transducer/step': R.mergeRight    };    eq(_isTransformer(R.groupBy(byType, xf)), true);  });
});