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Code Issues Releases Wiki Activity

Beef up unit test coverage in io package.

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This commit is contained in:
Jeff Schiller 2023-11-20 22:44:41 -08:00
parent 5c4a085292
commit 2ed482879f
8 changed files with 164 additions and 25 deletions
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30
tests/io-bitstream.spec.js
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@ -19,10 +19,22 @@ describe('bitjs.io.BitStream', () => {
}
});
it('BitPeekAndRead_RTL', () => {
it('throws an error without an ArrayBuffer', () => {
expect(() => new BitStream()).throws();
});
it('BitPeekAndRead_MTL', () => {
const stream = new BitStream(array.buffer, true /* mtl */);
expect(stream.peekBits(0)).equals(0);
expect(stream.peekBits(-1)).equals(0);
expect(stream.bytePtr).equals(0);
expect(stream.bitPtr).equals(0);
// 0110 = 2 + 4 = 6
expect(stream.readBits(4)).equals(6);
expect(stream.getNumBitsRead()).equals(4);
// 0101 011 = 1 + 2 + 8 + 32 = 43
expect(stream.readBits(7)).equals(43);
// 00101 01100101 01 = 1 + 4 + 16 + 128 + 256 + 1024 + 4096 = 5525
@ -32,11 +44,19 @@ describe('bitjs.io.BitStream', () => {
// Ensure the last bit is read, even if we flow past the end of the stream.
expect(stream.readBits(2)).equals(1);
expect(stream.getNumBitsRead()).equals(33);
});
it('BitPeekAndRead_LTR', () => {
it('BitPeekAndRead_LTM', () => {
/** @type {BitStream} */
const stream = new BitStream(array.buffer, false /* mtl */);
expect(stream.peekBits(0)).equals(0);
expect(stream.peekBits(-1)).equals(0);
expect(stream.bytePtr).equals(0);
expect(stream.bitPtr).equals(0);
// 0101 = 2 + 4 = 6
expect(stream.peekBits(4)).equals(5);
expect(stream.readBits(4)).equals(5);
@ -69,4 +89,10 @@ describe('bitjs.io.BitStream', () => {
expect(() => stream.readBytes(3)).throws();
});
it('throws an error with weird values of peekBytes()', () => {
/** @type {BitStream} */
const stream = new BitStream(array.buffer);
expect(() => stream.peekBytes(-1)).throws();
});
});