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Drop @ts-expect-error
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@fregante
fregante committed May 5, 2023
1 parent 06c5369 commit 90827b4
Showing 1 changed file with 8 additions and 52 deletions.
60 changes: 8 additions & 52 deletions test.ts
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Expand Up @@ -5,48 +5,30 @@ import mem, {memDecorator, memClear} from './index.js';

test('memoize', t => {
let i = 0;
const fixture = () => i++;
const fixture = (a?: unknown, b?: unknown) => i++;
const memoized = mem(fixture);
t.is(memoized(), 0);
t.is(memoized(), 0);
t.is(memoized(), 0);
// @ts-expect-error Testing "never"
t.is(memoized(undefined), 0);
// @ts-expect-error Testing "never"
t.is(memoized(undefined), 0);
// @ts-expect-error Testing "never"
t.is(memoized('foo'), 1);
// @ts-expect-error Testing "never"
t.is(memoized('foo'), 1);
// @ts-expect-error Testing "never"
t.is(memoized('foo'), 1);
// @ts-expect-error Testing "never"
t.is(memoized('foo', 'bar'), 1);
// @ts-expect-error Testing "never"
t.is(memoized('foo', 'bar'), 1);
// @ts-expect-error Testing "never"
t.is(memoized('foo', 'bar'), 1);
// @ts-expect-error Testing "never"
t.is(memoized(1), 2);
// @ts-expect-error Testing "never"
t.is(memoized(1), 2);
// @ts-expect-error Testing "never"
t.is(memoized(null), 3);
// @ts-expect-error Testing "never"
t.is(memoized(null), 3);
// @ts-expect-error Testing "never"
t.is(memoized(fixture), 4);
// @ts-expect-error Testing "never"
t.is(memoized(fixture), 4);
// @ts-expect-error Testing "never"
t.is(memoized(true), 5);
// @ts-expect-error Testing "never"
t.is(memoized(true), 5);

// Ensure that functions are stored by reference and not by "value" (e.g. their `.toString()` representation)
// @ts-expect-error Testing "never"
t.is(memoized(() => i++), 6);
// @ts-expect-error Testing "never"
t.is(memoized(() => i++), 7);
});

Expand All @@ -63,70 +45,54 @@ test('cacheKey option', t => {

test('memoize with multiple non-primitive arguments', t => {
let i = 0;
const memoized = mem(() => i++, {cacheKey: JSON.stringify});
const memoized = mem((a?: unknown, b?: unknown, c?: unknown) => i++, {cacheKey: JSON.stringify});
t.is(memoized(), 0);
t.is(memoized(), 0);
// @ts-expect-error Testing "never"
t.is(memoized({foo: true}, {bar: false}), 1);
// @ts-expect-error Testing "never"
t.is(memoized({foo: true}, {bar: false}), 1);
// @ts-expect-error Testing "never"
t.is(memoized({foo: true}, {bar: false}, {baz: true}), 2);
// @ts-expect-error Testing "never"
t.is(memoized({foo: true}, {bar: false}, {baz: true}), 2);
});

test('memoize with regexp arguments', t => {
let i = 0;
const memoized = mem(() => i++, {cacheKey: serializeJavascript});
const memoized = mem((a?: unknown) => i++, {cacheKey: serializeJavascript});
t.is(memoized(), 0);
t.is(memoized(), 0);
// @ts-expect-error Testing "never"
t.is(memoized(/Sindre Sorhus/), 1);
// @ts-expect-error Testing "never"
t.is(memoized(/Sindre Sorhus/), 1);
// @ts-expect-error Testing "never"
t.is(memoized(/Elvin Peng/), 2);
// @ts-expect-error Testing "never"
t.is(memoized(/Elvin Peng/), 2);
});

test('memoize with Symbol arguments', t => {
let i = 0;
const argument1 = Symbol('fixture1');
const argument2 = Symbol('fixture2');
const memoized = mem(() => i++);
const memoized = mem((a?: unknown) => i++);
t.is(memoized(), 0);
t.is(memoized(), 0);
// @ts-expect-error Testing "never"
t.is(memoized(argument1), 1);
// @ts-expect-error Testing "never"
t.is(memoized(argument1), 1);
// @ts-expect-error Testing "never"
t.is(memoized(argument2), 2);
// @ts-expect-error Testing "never"
t.is(memoized(argument2), 2);
});

test('maxAge option', async t => {
let i = 0;
const fixture = () => i++;
const fixture = (a?: unknown) => i++;
const memoized = mem(fixture, {maxAge: 100});
// @ts-expect-error Testing "never"
t.is(memoized(1), 0);
// @ts-expect-error Testing "never"
t.is(memoized(1), 0);
await delay(50);
// @ts-expect-error Testing "never"
t.is(memoized(1), 0);
await delay(200);
// @ts-expect-error Testing "never"
t.is(memoized(1), 1);
});

test('maxAge option deletes old items', async t => {
let i = 0;
const fixture = () => i++;
const fixture = (a?: unknown) => i++;
const cache = new Map<number, number>();
const deleted: number[] = [];
const _delete = cache.delete.bind(cache);
Expand All @@ -135,27 +101,22 @@ test('maxAge option deletes old items', async t => {
return _delete(item);
};

// @ts-expect-error Testing "never"
const memoized = mem(fixture, {maxAge: 100, cache});
// @ts-expect-error Testing "never"
t.is(memoized(1), 0);
// @ts-expect-error Testing "never"
t.is(memoized(1), 0);
t.is(cache.has(1), true);
await delay(50);
// @ts-expect-error Testing "never"
t.is(memoized(1), 0);
t.is(deleted.length, 0);
await delay(200);
// @ts-expect-error Testing "never"
t.is(memoized(1), 1);
t.is(deleted.length, 1);
t.is(deleted[0], 1);
});

test('maxAge items are deleted even if function throws', async t => {
let i = 0;
const fixture = () => {
const fixture = (a?: unknown) => {
if (i === 1) {
throw new Error('failure');
}
Expand All @@ -165,17 +126,13 @@ test('maxAge items are deleted even if function throws', async t => {

const cache = new Map();
const memoized = mem(fixture, {maxAge: 100, cache});
// @ts-expect-error Testing "never"
t.is(memoized(1), 0);
// @ts-expect-error Testing "never"
t.is(memoized(1), 0);
t.is(cache.size, 1);
await delay(50);
// @ts-expect-error Testing "never"
t.is(memoized(1), 0);
await delay(200);
t.throws(() => {
// @ts-expect-error Testing "never"
memoized(1);
}, {message: 'failure'});
t.is(cache.size, 0);
Expand All @@ -198,10 +155,9 @@ test('cache option', t => {

test('promise support', async t => {
let i = 0;
const memoized = mem(async () => i++);
const memoized = mem(async (a?: unknown) => i++);
t.is(await memoized(), 0);
t.is(await memoized(), 0);
// @ts-expect-error Testing "never"
t.is(await memoized(10), 1);
});

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