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denoland-deno/cli/tests/unit/dispatch_json_test.ts
Jared Beller b50691efed
refactor(core): Strongly typed deserialization of JSON ops (#9423)
This PR makes json_op_sync/async generic to all Deserialize/Serialize types
instead of the loosely-typed serde_json::Value. Since serde_json::Value
implements Deserialize/Serialize, very little existing code needs to be updated,
however as json_op_sync/async are now generic, type inference is broken in some
cases (see cli/build.rs:146). I've found this reduces a good bit of boilerplate,
as seen in the updated deno_core examples.

This change may also reduce serialization and deserialization overhead as serde
has a better idea of what types it is working with. I am currently working on
benchmarks to confirm this and I will update this PR with my findings.
2021-02-13 11:56:56 -05:00

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TypeScript

import { assertMatch, assertStrictEquals, unitTest } from "./test_util.ts";
declare global {
// deno-lint-ignore no-namespace
namespace Deno {
// deno-lint-ignore no-explicit-any
var core: any; // eslint-disable-line no-var
}
}
unitTest(function malformedJsonControlBuffer(): void {
const opId = Deno.core.ops()["op_open_sync"];
const argsBuf = new Uint8Array([1, 2, 3, 4, 5]);
const resBuf = Deno.core.send(opId, argsBuf);
const resText = new TextDecoder().decode(resBuf);
const resObj = JSON.parse(resText);
assertStrictEquals(resObj.ok, undefined);
assertStrictEquals(resObj.err.className, "SyntaxError");
assertMatch(resObj.err.message, /\bexpected value\b/);
});
unitTest(function invalidPromiseId(): void {
const opId = Deno.core.ops()["op_open_async"];
const reqBuf = new Uint8Array([0, 0, 0, 0, 0, 0, 0]);
const resBuf = Deno.core.send(opId, reqBuf);
const resText = new TextDecoder().decode(resBuf);
const resObj = JSON.parse(resText);
console.error(resText);
assertStrictEquals(resObj.ok, undefined);
assertStrictEquals(resObj.err.className, "TypeError");
assertMatch(resObj.err.message, /\bpromiseId\b/);
});