83 lines
2.3 KiB
TypeScript
83 lines
2.3 KiB
TypeScript
/** @fileoverview Test for utils.ts. */
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import { allocMem, allocMemPages, testables, toBinary, toHex } from '../../js/util';
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describe('garbage', () => {
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it('returns 0 <= x <= 255', () => {
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for (let i = 0; i < 1024; i++) {
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expect(testables.garbage()).toBeGreaterThanOrEqual(0);
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}
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});
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});
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describe('allocMem', () => {
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it('returns an array of the correct size', () => {
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expect(allocMem(2048).length).toBe(2048);
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});
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it('has 0xff and 0x00 patterns', () => {
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const memory = allocMem(2048);
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expect(memory[0]).toBe(0xff);
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expect(memory[1]).toBe(0xff);
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expect(memory[2]).toBe(0x00);
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expect(memory[3]).toBe(0x00);
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expect(memory[4]).toBe(0xff);
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});
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it('has garbage in the right places', () => {
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const memory = allocMem(0x800);
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let passed = false;
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for (let i = 0; i < 0x800; i += 0x200) {
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passed = memory[i + 0x28] !== 0xff
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&& memory[i + 0x29] !== 0xff
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&& memory[i + 0x68] !== 0xff
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&& memory[i + 0x69] !== 0xff;
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if (passed) {
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break;
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}
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}
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expect(passed).toBe(true);
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});
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});
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describe('allocMemPages', () => {
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it('allocates 256 * the size', () => {
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expect(allocMemPages(5).length).toBe(5 * 256);
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});
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});
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describe('toHex', () => {
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it('converts an odd number of characters', () => {
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expect(toHex(0xfedcb, 5)).toEqual('FEDCB');
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});
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it('correctly guesses byte values', () => {
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expect(toHex(0xa5)).toEqual('A5');
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});
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it('correctly guesses word values', () => {
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expect(toHex(0x1abc)).toEqual('1ABC');
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});
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it('only uses the bottom work of larger values', () => {
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expect(toHex(0xabcdef)).toEqual('CDEF');
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});
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it('correctly prepends zeros', () => {
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expect(toHex(0xa5, 4)).toEqual('00A5');
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});
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});
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describe('toBinary', () => {
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it('has 8 digits for zero', () => {
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expect(toBinary(0x00)).toEqual('00000000');
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});
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it('correctly sets bits', () => {
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expect(toBinary(0xa5)).toEqual('10100101');
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});
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});
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describe('gup', () => {
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// untestable due to direct reference to window.location
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});
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describe('hup', () => {
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// untestable due to direct reference to window.location
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});
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