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

describe('evolve', function() {  it('creates a new object by evolving the `object` according to the `transformation` functions', function() {    var transf   = {elapsed: R.add(1), remaining: R.add(-1)};    var object   = {name: 'Tomato', elapsed: 100, remaining: 1400};    var expected = {name: 'Tomato', elapsed: 101, remaining: 1399};    eq(R.evolve(transf, object), expected);  });
  it('does not invoke function if object does not contain the key', function() {    var transf   = {n: R.add(1), m: R.add(1)};    var object   = {m: 3};    var expected = {m: 4};    eq(R.evolve(transf, object), expected);  });
  it('is not destructive', function() {    var transf   = {elapsed: R.add(1), remaining: R.add(-1)};    var object   = {name: 'Tomato', elapsed: 100, remaining: 1400};    var expected = {name: 'Tomato', elapsed: 100, remaining: 1400};    R.evolve(transf, object);    eq(object, expected);  });
  it('is recursive', function() {    var transf   = {nested: {second: R.add(-1), third: R.add(1)}};    var object   = {first: 1, nested: {second: 2, third: 3}};    var expected = {first: 1, nested: {second: 1, third: 4}};    eq(R.evolve(transf, object), expected);  });
  it('ignores primitive value transformations', function() {    var transf   = {n: 2, m: 'foo'};    var object   = {n: 0, m: 1};    var expected = {n: 0, m: 1};    eq(R.evolve(transf, object), expected);  });
  it('ignores null transformations', function() {    var transf   = {n: null};    var object   = {n: 0};    var expected = {n: 0};    eq(R.evolve(transf, object), expected);  });
  it('creates a new array by evolving the `array` according to the `transformation` functions', function() {    var transf   = [R.add(1), R.add(-1)];    var object   = [100, 1400];    var expected = [101, 1399];    eq(R.evolve(transf, object), expected);  });
  it('ignores transformations if the input value is not Array and Object', function() {    var transf   = { a: R.add(1) };    eq(R.evolve(transf, 42), 42);    eq(R.evolve(transf, undefined), undefined);    eq(R.evolve(transf, null), null);    eq(R.evolve(transf, ''), '');  });});