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Allow cache.set(x, undefined) to delete the cached item #26

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merged 9 commits into from
Nov 22, 2020
Merged

Allow cache.set(x, undefined) to delete the cached item #26

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5e03fc2
Allow `cache.set(x, undefined)` to delete the cached item (fix #25)
cheap-glitch Sep 23, 2020
158348b
Update test to match new behaviour of `cache.set(x, undefined)`
cheap-glitch Sep 23, 2020
6daeac9
Return after deleting cached value
cheap-glitch Sep 23, 2020
6f2a6a7
Fix types ?
fregante Sep 23, 2020
ac2e01b
Fix merge conflict
cheap-glitch Nov 22, 2020
8a8903f
Throw an error when `set()` is called without a value
cheap-glitch Nov 22, 2020
82d2c82
Improve error message
cheap-glitch Nov 22, 2020
64baf1f
Fix expected message in test
cheap-glitch Nov 22, 2020
fc53de5
Use if/else since now they both return a value
fregante Nov 22, 2020
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3 changes: 1 addition & 2 deletions index.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -68,8 +68,7 @@ async function get<TValue extends Value>(key: string): Promise<TValue | undefine

async function set<TValue extends Value>(key: string, value: TValue, maxAge: TimeDescriptor = {days: 30}): Promise<TValue> {
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I think the only issue here is that undefined isn't accepted by the types

Suggested change
async function set<TValue extends Value>(key: string, value: TValue, maxAge: TimeDescriptor = {days: 30}): Promise<TValue> {
async function set<TValue extends Value>(key: string, value: TValue | undefined, maxAge: TimeDescriptor = {days: 30}): Promise<TValue> {

I released a prerelease 4.3.0-0 if you want to try it in RGH in the original issue that discussed this

if (typeof value === 'undefined') {
// @ts-ignore This never happens in TS because `value` can't be undefined
return;
await delete_(key);
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}

const internalKey = `cache:${key}`;
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5 changes: 3 additions & 2 deletions test/index.js
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Expand Up @@ -65,9 +65,10 @@ test.serial('has() with expired cache', async t => {
});

test.serial('set() with undefined', async t => {
await cache.set('name', 'Anne');
await cache.set('name');
// StorageArea.set should not be called with `undefined`
t.is(chrome.storage.local.set.callCount, 0);
// Cached value should be erased
t.is(await cache.has('name'), false);
});

test.todo('set() with past maxAge should throw');
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