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Copy pathusing.spec.ts
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195 lines (161 loc) · 5.21 KB
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import { LuaLibImportKind } from "../../src";
import * as util from "../util";
const usingTestLib = `
export const logs: string[] = [];
function loggedDisposable(id: string): Disposable {
logs.push(\`Creating \${id}\`);
return {
[Symbol.dispose]() {
logs.push(\`Disposing \${id}\`);
}
}
}`;
test("using disposes object at end of function", () => {
util.testModule`
function func() {
using a = loggedDisposable("a");
using b = loggedDisposable("b");
logs.push("function content");
}
func();
`
.setTsHeader(usingTestLib)
.expectToEqual({ logs: ["Creating a", "Creating b", "function content", "Disposing b", "Disposing a"] });
});
test("handles multi-variable declarations", () => {
util.testModule`
function func() {
using a = loggedDisposable("a"), b = loggedDisposable("b");
logs.push("function content");
}
func();
`
.setTsHeader(usingTestLib)
.expectToEqual({ logs: ["Creating a", "Creating b", "function content", "Disposing b", "Disposing a"] });
});
test("using disposes object at end of nested block", () => {
util.testModule`
function func() {
using a = loggedDisposable("a");
{
using b = loggedDisposable("b");
logs.push("nested block");
}
logs.push("function content");
}
func();
`
.setTsHeader(usingTestLib)
.expectToEqual({
logs: ["Creating a", "Creating b", "nested block", "Disposing b", "function content", "Disposing a"],
});
});
test("using does not affect function return value", () => {
util.testModule`
function func() {
using a = loggedDisposable("a");
using b = loggedDisposable("b");
logs.push("function content");
return "success";
}
export const result = func();
`
.setTsHeader(usingTestLib)
.expectToEqual({
result: "success",
logs: ["Creating a", "Creating b", "function content", "Disposing b", "Disposing a"],
});
});
test("using disposes even when error happens", () => {
util.testModule`
function func() {
using a = loggedDisposable("a");
using b = loggedDisposable("b");
throw "test-induced exception";
}
try
{
func();
}
catch (e)
{
logs.push(\`caught exception: \${e}\`);
}
`
.setTsHeader(usingTestLib)
.expectToEqual({
logs: [
"Creating a",
"Creating b",
"Disposing b",
"Disposing a",
"caught exception: test-induced exception",
],
});
});
test("await using disposes object with await at end of function", () => {
util.testModule`
let disposeAsync;
function loggedAsyncDisposable(id: string): AsyncDisposable {
logs.push(\`Creating \${id}\`);
return {
[Symbol.asyncDispose]() {
logs.push(\`Disposing async \${id}\`);
return new Promise(resolve => {
disposeAsync = () => {
logs.push(\`Disposed \${id}\`);
resolve();
};
});
}
}
}
async function func() {
await using a = loggedAsyncDisposable("a");
logs.push("function content");
return "function result";
}
const p = func().then(r => logs.push("promise resolved", r));
logs.push("function returned");
disposeAsync();
`
.setTsHeader(usingTestLib)
.setOptions({ luaLibImport: LuaLibImportKind.Inline })
.expectToEqual({
logs: [
"Creating a",
"function content",
"Disposing async a",
"function returned",
"Disposed a",
"promise resolved",
"function result",
],
});
});
test("await using can handle non-async disposables", () => {
util.testModule`
async function func() {
await using a = loggedDisposable("a");
logs.push("function content");
}
func();
`
.setTsHeader(usingTestLib)
.expectToEqual({ logs: ["Creating a", "function content", "Disposing a"] });
});
// https://github.com/TypeScriptToLua/TypeScriptToLua/issues/1571
test("await using no extra diagnostics (#1571)", () => {
util.testModule`
async function getResource(): Promise<AsyncDisposable> {
return {
[Symbol.asyncDispose]: async () => {}
};
}
async function someOtherAsync() {}
async function main() {
await using resource = await getResource();
await someOtherAsync();
}
`.expectToHaveNoDiagnostics();
});