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

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

test('intersecting arrays return intersect', function(t) {

t.plan(1);

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

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

t.deepEqual(intersect(arr1, arr2), [3, 4, 5]);

t.end();

});

test('result is de-duped', function(t) {

t.plan(1);

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

var arr2 = [3, 2, 2, 5, 7];

t.deepEqual(intersect(arr1, arr2), [2, 5]);

t.end();

});

test('non intersecting arrays return empty array', function(t) {

t.plan(1);

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

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

t.deepEqual(intersect(arr1, arr2), []);

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() {

intersect(undefined, arr2);

});

t.throws(function() {

intersect(null, arr2);

});

t.throws(function() {

intersect({}, arr2);

});

t.throws(function() {

intersect('a', arr2);

});

t.throws(function() {

intersect(arr1, undefined);

});

t.throws(function() {

intersect(arr1, null);

});

t.throws(function() {

intersect(arr1, {});

});

t.throws(function() {

intersect(arr1, 'a');

});

t.end();

});