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

describe('unnest', function() {
  it('only flattens one layer deep of a nested list', function() {    var nest = [1, [2], [3, [4, 5], 6, [[[7], 8]]], 9, 10];    eq(R.unnest(nest), [1, 2, 3, [4, 5], 6, [[[7], 8]], 9, 10]);    nest = [[[[3]], 2, 1], 0, [[-1, -2], -3]];    eq(R.unnest(nest), [[[3]], 2, 1, 0, [-1, -2], -3]);    eq(R.unnest([1, 2, 3, 4, 5]), [1, 2, 3, 4, 5]);  });
  it('is not destructive', function() {    var nest = [1, [2], [3, [4, 5], 6, [[[7], 8]]], 9, 10];    assert.notStrictEqual(R.unnest(nest), nest);  });
  it('handles array-like objects', function() {    var o = {length: 3, 0: [1, 2, [3]], 1: [], 2: ['a', 'b', 'c', ['d', 'e']]};    eq(R.unnest(o), [1, 2, [3], 'a', 'b', 'c', ['d', 'e']]);  });
  it('flattens an array of empty arrays', function() {    eq(R.unnest([[], [], []]), []);    eq(R.unnest([]), []);  });
  it('is equivalent to R.chain(R.identity)', function() {    var Nothing = Maybe.Nothing;    var Just = Maybe.Just;
    eq(R.unnest(Nothing), Nothing);    eq(R.unnest(Just(Nothing)), Nothing);    eq(R.unnest(Just(Just(Nothing))), Just(Nothing));    eq(R.unnest(Just(Just(42))), Just(42));    eq(R.unnest(Just(Just(Just(42)))), Just(Just(42)));  });
});