112 lines
2.7 KiB
JavaScript
112 lines
2.7 KiB
JavaScript
defineDescribe('ArrayUtilities', ['./ArrayUtilities'], (array) => {
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'use strict';
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describe('.mergeSets', () => {
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it('adds elements from the second array into the first', () => {
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const p1 = ['a', 'b'];
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const p2 = ['c', 'd'];
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array.mergeSets(p1, p2);
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expect(p1).toEqual(['a', 'b', 'c', 'd']);
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});
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it('ignores null parameters', () => {
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const p1 = ['a', 'b'];
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array.mergeSets(p1, null);
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expect(p1).toEqual(['a', 'b']);
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});
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it('leaves the second parameter unchanged', () => {
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const p1 = ['a', 'b'];
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const p2 = ['c', 'd'];
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array.mergeSets(p1, p2);
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expect(p2).toEqual(['c', 'd']);
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});
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it('ignores duplicates', () => {
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const p1 = ['a', 'b'];
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const p2 = ['b', 'c'];
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array.mergeSets(p1, p2);
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expect(p1).toEqual(['a', 'b', 'c']);
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});
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it('maintains input ordering', () => {
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const p1 = ['a', 'x', 'c', 'd'];
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const p2 = ['d', 'x', 'e', 'a'];
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array.mergeSets(p1, p2);
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expect(p1).toEqual(['a', 'x', 'c', 'd', 'e']);
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});
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});
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describe('.removeAll', () => {
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it('removes elements from the first array', () => {
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const p1 = ['a', 'b', 'c'];
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const p2 = ['a', 'b'];
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array.removeAll(p1, p2);
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expect(p1).toEqual(['c']);
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});
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it('ignores null parameters', () => {
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const p1 = ['a', 'b'];
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array.removeAll(p1, null);
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expect(p1).toEqual(['a', 'b']);
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});
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it('leaves the second parameter unchanged', () => {
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const p1 = ['a', 'b', 'c'];
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const p2 = ['a', 'b'];
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array.removeAll(p1, p2);
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expect(p2).toEqual(['a', 'b']);
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});
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it('ignores duplicates', () => {
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const p1 = ['a', 'b', 'c'];
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const p2 = ['a', 'b', 'b'];
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array.removeAll(p1, p2);
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expect(p1).toEqual(['c']);
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});
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it('maintains input ordering', () => {
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const p1 = ['a', 'x', 'c', 'd'];
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const p2 = ['c'];
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array.removeAll(p1, p2);
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expect(p1).toEqual(['a', 'x', 'd']);
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});
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});
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describe('.remove', () => {
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it('removes one element matching the parameter', () => {
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const p1 = ['a', 'b'];
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array.removeAll(p1, 'b');
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expect(p1).toEqual(['a']);
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});
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it('removes only the first element matching the parameter', () => {
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const p1 = ['a', 'b', 'c', 'b'];
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array.removeAll(p1, 'b');
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expect(p1).toEqual(['a', 'c', 'b']);
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});
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it('ignores if not found', () => {
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const p1 = ['a', 'b', 'c'];
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array.removeAll(p1, 'nope');
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expect(p1).toEqual(['a', 'b', 'c']);
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});
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it('maintains input ordering', () => {
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const p1 = ['a', 'b', 'c'];
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array.removeAll(p1, 'b');
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expect(p1).toEqual(['a', 'c']);
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});
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});
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describe('.last', () => {
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it('returns the last element of the array', () => {
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expect(array.last(['a', 'b'])).toEqual('b');
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});
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it('returns undefined for empty arrays', () => {
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expect(array.last([])).toEqual(undefined);
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});
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});
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});
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