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

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

test("union of intersecting arrays doesn't include dupliccates", function(t) {

t.plan(1);

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

var arr2 = [3, 4, 5, 6, 7];

t.deepEqual(union(arr1, arr2), [1, 2, 3, 4, 5, 6, 7]);

t.end();

});

test('union of non-intersecting arrays return all members', function(t) {

t.plan(1);

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

var arr2 = [6, 7, 8, 9, 10];

t.deepEqual(union(arr1, arr2), [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]);

t.end();

});

test('does not mutate', function(t) {

t.plan(1);

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

var arr2 = [6, 7, 8, 9, 10];

t.notEqual(union(arr1, arr2), arr1);

t.end();

});

test("throws if first two arguments aren't arrays", function(t) {

t.plan(8);

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

var arr2 = [6, 7, 8, 9, 10];

t.throws(function() {

union(undefined, arr2);

});

t.throws(function() {

union(null, arr2);

});

t.throws(function() {

union({}, arr2);

});

t.throws(function() {

union('a', arr2);

});

t.throws(function() {

union(arr1, undefined);

});

t.throws(function() {

union(arr1, null);

});

t.throws(function() {

union(arr1, {});

});

t.throws(function() {

union(arr1, 'a');

});

t.end();

});