var test = require('../util/test')(__filename);

var insert = require('../../packages/array-insert');

test('adds array elements at given index', function(t) {

t.plan(2);

var arr1 = [1, 2, 3, 4, 5, 6];

var arr2 = ['a', 'b', 'c'];

t.deepEqual(insert(arr1, arr2, 0), ['a', 'b', 'c', 1, 2, 3, 4, 5, 6]);

t.deepEqual(insert(arr1, arr2, 2), [1, 2, 'a', 'b', 'c', 3, 4, 5, 6]);

t.end();

});

test('adds array elements at start if no index supplied', function(t) {

t.plan(1);

var arr1 = [1, 2, 3, 4, 5, 6];

var arr2 = ['a', 'b', 'c'];

t.deepEqual(insert(arr1, arr2), ['a', 'b', 'c', 1, 2, 3, 4, 5, 6]);

t.end();

});

test('adds array elements at end if index too big', function(t) {

t.plan(1);

var arr1 = [1, 2, 3, 4, 5, 6];

var arr2 = ['a', 'b', 'c'];

t.deepEqual(insert(arr1, arr2, 99), [1, 2, 3, 4, 5, 6, 'a', 'b', 'c']);

t.end();

});

test('adds non array values at given index', function(t) {

t.plan(3);

var arr1 = [1, 2, 3, 4, 5, 6];

t.deepEqual(insert(arr1, 2.5, 2), [1, 2, 2.5, 3, 4, 5, 6]);

t.deepEqual(insert(arr1, {a: 4}, 2), [1, 2, {a: 4}, 3, 4, 5, 6]);

t.deepEqual(insert(arr1, 'x'), ['x', 1, 2, 3, 4, 5, 6]);

t.end();

});

test('throws if first argument is not an array', function(t) {

t.plan(3);

t.throws(function() {

insert(undefined, [1, 2, 3, 4, 5], 4);

});

t.throws(function() {

insert(null, [1, 2, 3, 4, 5], 3);

});

t.throws(function() {

insert({}, [1, 2, 3], 'x');

});

t.end();

});

test('throws if third argument is present and not a number', function(t) {

t.plan(3);

t.throws(function() {

insert([1, 2, 3, 4, 5, 6], [1, 2, 3, 4, 5], '4');

});

t.throws(function() {

insert([1, 2, 3, 4, 5, 6], [1, 2, 3, 4, 5], {});

});

t.throws(function() {

insert([1, 2, 3, 4, 5, 6], [1, 2, 3, 4, 5], undefined);

});

t.end();

});