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95 lines
3.8 KiB
HTML
95 lines
3.8 KiB
HTML
<!DOCTYPE html>
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<meta charset="utf-8">
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<title>KV Storage: keys()/values()/entries()</title>
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<!--
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This file contains tests that are easy to generalize over all three methods.
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See sibling files for more complicated tests which are not worth generalizing.
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-->
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/IndexedDB/support-promises.js"></script>
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<script type="module">
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import { testWithArea } from "./helpers/kvs-tests.js";
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import * as classAssert from "./helpers/class-assert.js";
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import { assertAsyncIteratorEquals } from "./helpers/equality-asserters.js";
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// Also uses some global functions included via support-promises.js.
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const AsyncIteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf(async function*() {}).prototype);
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testWithArea(async area => {
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const keysProto = Object.getPrototypeOf(area.keys());
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const valuesProto = Object.getPrototypeOf(area.values());
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const entriesProto = Object.getPrototypeOf(area.entries());
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assert_equals(keysProto, valuesProto, "keys() and values() return values' must have the same [[Prototype]]");
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assert_equals(valuesProto, entriesProto, "values() and entries () return values' must have the same [[Prototype]]");
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}, "keys()/values()/entries() all use the same prototype object");
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for (const method of ["keys", "values", "entries"]) {
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testWithArea(async area => {
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const iter = area[method]();
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const proto = Object.getPrototypeOf(iter);
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assert_equals(Object.getPrototypeOf(proto), AsyncIteratorPrototype,
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"[[Prototype]] must be the async iterator prototype");
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classAssert.propertyKeys(proto, ["next"], [], "must only have a next() method");
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}, `${method}() return value is an async iterator of the expected shape`);
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testWithArea(async area => {
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const iter = area[method]();
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const promise = iter.next();
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await area.set(1, "value 1");
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const iterResults = [
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await promise,
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await iter.next()
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];
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classAssert.iterResults(iterResults, [
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[undefined, true],
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[undefined, true]
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]);
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}, `${method}(): .next() on empty means forever done, even if you set more`);
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testWithArea(async area => {
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for await (const key of area[method]()) {
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assert_unreached("Loop body must not be entered");
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}
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}, `${method}(): for-await-of loop body never executes`);
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testWithArea(async (area, t) => {
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await area.set(1, "value 1");
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const iter = area[method]();
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const { database, store, version } = area.backingStore;
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await migrateNamedDatabase(t, database, version + 1, () => {});
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const iterResultPromise1 = iter.next();
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const iterResultPromise2 = iter.next();
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await promise_rejects(t, "VersionError", iterResultPromise1, "first next()");
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await promise_rejects(t, "VersionError", iterResultPromise2, "second next()");
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const iterResultPromise3 = iter.next();
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assert_not_equals(iterResultPromise1, iterResultPromise2,
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"Two promises retrieved from synchronous next() calls must be different (1 vs 2)");
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assert_not_equals(iterResultPromise1, iterResultPromise3,
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"Two promises, one retrieved after waiting for the other, must be different (1 vs 3)");
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assert_not_equals(iterResultPromise2, iterResultPromise3,
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"Two promises, one retrieved after waiting for the other, must be different (2 vs 3)");
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await promise_rejects(t, "VersionError", iterResultPromise2, "third next()");
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const reason1 = await iterResultPromise1.catch(r => r);
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const reason2 = await iterResultPromise2.catch(r => r);
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const reason3 = await iterResultPromise3.catch(r => r);
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assert_equals(reason1, reason2, "reasons must be the same (1 vs 2)");
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assert_equals(reason2, reason3, "reasons must be the same (2 vs 3)");
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}, `${method}(): error path: returns new rejected promises, each with the same reason`);
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}
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</script>
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