"use strict";
|
|
const promisify = require("util.promisify");
|
const gensync = require("../");
|
|
const TEST_ERROR = new Error("TEST_ERROR");
|
|
const DID_ERROR = new Error("DID_ERROR");
|
|
const doSuccess = gensync({
|
sync: () => 42,
|
async: () => Promise.resolve(42),
|
});
|
|
const doError = gensync({
|
sync: () => {
|
throw DID_ERROR;
|
},
|
async: () => Promise.reject(DID_ERROR),
|
});
|
|
function throwTestError() {
|
throw TEST_ERROR;
|
}
|
|
async function expectResult(
|
fn,
|
arg,
|
{ error, value, expectSync = false, syncErrback = expectSync }
|
) {
|
if (!expectSync) {
|
expect(() => fn.sync(arg)).toThrow(TEST_ERROR);
|
} else if (error) {
|
expect(() => fn.sync(arg)).toThrow(error);
|
} else {
|
expect(fn.sync(arg)).toBe(value);
|
}
|
|
if (error) {
|
await expect(fn.async(arg)).rejects.toBe(error);
|
} else {
|
await expect(fn.async(arg)).resolves.toBe(value);
|
}
|
|
await new Promise((resolve, reject) => {
|
let sync = true;
|
fn.errback(arg, (err, val) => {
|
try {
|
expect(err).toBe(error);
|
expect(val).toBe(value);
|
expect(sync).toBe(syncErrback);
|
|
resolve();
|
} catch (e) {
|
reject(e);
|
}
|
});
|
sync = false;
|
});
|
}
|
|
describe("gensync({})", () => {
|
describe("option validation", () => {
|
test("disallow async and errback handler together", () => {
|
try {
|
gensync({
|
sync: throwTestError,
|
async: throwTestError,
|
errback: throwTestError,
|
});
|
|
throwTestError();
|
} catch (err) {
|
expect(err.message).toMatch(
|
/Expected one of either opts.async or opts.errback, but got _both_\./
|
);
|
expect(err.code).toBe("GENSYNC_OPTIONS_ERROR");
|
}
|
});
|
|
test("disallow missing sync handler", () => {
|
try {
|
gensync({
|
async: throwTestError,
|
});
|
|
throwTestError();
|
} catch (err) {
|
expect(err.message).toMatch(/Expected opts.sync to be a function./);
|
expect(err.code).toBe("GENSYNC_OPTIONS_ERROR");
|
}
|
});
|
|
test("errback callback required", () => {
|
const fn = gensync({
|
sync: throwTestError,
|
async: throwTestError,
|
});
|
|
try {
|
fn.errback();
|
|
throwTestError();
|
} catch (err) {
|
expect(err.message).toMatch(/function called without callback/);
|
expect(err.code).toBe("GENSYNC_ERRBACK_NO_CALLBACK");
|
}
|
});
|
});
|
|
describe("generator function metadata", () => {
|
test("automatic naming", () => {
|
expect(
|
gensync({
|
sync: function readFileSync() {},
|
async: () => {},
|
}).name
|
).toBe("readFile");
|
expect(
|
gensync({
|
sync: function readFile() {},
|
async: () => {},
|
}).name
|
).toBe("readFile");
|
expect(
|
gensync({
|
sync: function readFileAsync() {},
|
async: () => {},
|
}).name
|
).toBe("readFileAsync");
|
|
expect(
|
gensync({
|
sync: () => {},
|
async: function readFileSync() {},
|
}).name
|
).toBe("readFileSync");
|
expect(
|
gensync({
|
sync: () => {},
|
async: function readFile() {},
|
}).name
|
).toBe("readFile");
|
expect(
|
gensync({
|
sync: () => {},
|
async: function readFileAsync() {},
|
}).name
|
).toBe("readFile");
|
|
expect(
|
gensync({
|
sync: () => {},
|
errback: function readFileSync() {},
|
}).name
|
).toBe("readFileSync");
|
expect(
|
gensync({
|
sync: () => {},
|
errback: function readFile() {},
|
}).name
|
).toBe("readFile");
|
expect(
|
gensync({
|
sync: () => {},
|
errback: function readFileAsync() {},
|
}).name
|
).toBe("readFileAsync");
|
});
|
|
test("explicit naming", () => {
|
expect(
|
gensync({
|
name: "readFile",
|
sync: () => {},
|
async: () => {},
|
}).name
|
).toBe("readFile");
|
});
|
|
test("default arity", () => {
|
expect(
|
gensync({
|
sync: function(a, b, c, d, e, f, g) {
|
throwTestError();
|
},
|
async: throwTestError,
|
}).length
|
).toBe(7);
|
});
|
|
test("explicit arity", () => {
|
expect(
|
gensync({
|
arity: 3,
|
sync: throwTestError,
|
async: throwTestError,
|
}).length
|
).toBe(3);
|
});
|
});
|
|
describe("'sync' handler", async () => {
|
test("success", async () => {
|
const fn = gensync({
|
sync: (...args) => JSON.stringify(args),
|
});
|
|
await expectResult(fn, 42, { value: "[42]", expectSync: true });
|
});
|
|
test("failure", async () => {
|
const fn = gensync({
|
sync: (...args) => {
|
throw JSON.stringify(args);
|
},
|
});
|
|
await expectResult(fn, 42, { error: "[42]", expectSync: true });
|
});
|
});
|
|
describe("'async' handler", async () => {
|
test("success", async () => {
|
const fn = gensync({
|
sync: throwTestError,
|
async: (...args) => Promise.resolve(JSON.stringify(args)),
|
});
|
|
await expectResult(fn, 42, { value: "[42]" });
|
});
|
|
test("failure", async () => {
|
const fn = gensync({
|
sync: throwTestError,
|
async: (...args) => Promise.reject(JSON.stringify(args)),
|
});
|
|
await expectResult(fn, 42, { error: "[42]" });
|
});
|
});
|
|
describe("'errback' sync handler", async () => {
|
test("success", async () => {
|
const fn = gensync({
|
sync: throwTestError,
|
errback: (...args) => args.pop()(null, JSON.stringify(args)),
|
});
|
|
await expectResult(fn, 42, { value: "[42]", syncErrback: true });
|
});
|
|
test("failure", async () => {
|
const fn = gensync({
|
sync: throwTestError,
|
errback: (...args) => args.pop()(JSON.stringify(args)),
|
});
|
|
await expectResult(fn, 42, { error: "[42]", syncErrback: true });
|
});
|
});
|
|
describe("'errback' async handler", async () => {
|
test("success", async () => {
|
const fn = gensync({
|
sync: throwTestError,
|
errback: (...args) =>
|
process.nextTick(() => args.pop()(null, JSON.stringify(args))),
|
});
|
|
await expectResult(fn, 42, { value: "[42]" });
|
});
|
|
test("failure", async () => {
|
const fn = gensync({
|
sync: throwTestError,
|
errback: (...args) =>
|
process.nextTick(() => args.pop()(JSON.stringify(args))),
|
});
|
|
await expectResult(fn, 42, { error: "[42]" });
|
});
|
});
|
});
|
|
describe("gensync(function* () {})", () => {
|
test("sync throw before body", async () => {
|
const fn = gensync(function*(arg = throwTestError()) {});
|
|
await expectResult(fn, undefined, {
|
error: TEST_ERROR,
|
syncErrback: true,
|
});
|
});
|
|
test("sync throw inside body", async () => {
|
const fn = gensync(function*() {
|
throwTestError();
|
});
|
|
await expectResult(fn, undefined, {
|
error: TEST_ERROR,
|
syncErrback: true,
|
});
|
});
|
|
test("async throw inside body", async () => {
|
const fn = gensync(function*() {
|
const val = yield* doSuccess();
|
throwTestError();
|
});
|
|
await expectResult(fn, undefined, {
|
error: TEST_ERROR,
|
});
|
});
|
|
test("error inside body", async () => {
|
const fn = gensync(function*() {
|
yield* doError();
|
});
|
|
await expectResult(fn, undefined, {
|
error: DID_ERROR,
|
expectSync: true,
|
syncErrback: false,
|
});
|
});
|
|
test("successful return value", async () => {
|
const fn = gensync(function*() {
|
const value = yield* doSuccess();
|
|
expect(value).toBe(42);
|
|
return 84;
|
});
|
|
await expectResult(fn, undefined, {
|
value: 84,
|
expectSync: true,
|
syncErrback: false,
|
});
|
});
|
|
test("successful final value", async () => {
|
const fn = gensync(function*() {
|
return 42;
|
});
|
|
await expectResult(fn, undefined, {
|
value: 42,
|
expectSync: true,
|
});
|
});
|
|
test("yield unexpected object", async () => {
|
const fn = gensync(function*() {
|
yield {};
|
});
|
|
try {
|
await fn.async();
|
|
throwTestError();
|
} catch (err) {
|
expect(err.message).toMatch(
|
/Got unexpected yielded value in gensync generator/
|
);
|
expect(err.code).toBe("GENSYNC_EXPECTED_START");
|
}
|
});
|
|
test("yield suspend yield", async () => {
|
const fn = gensync(function*() {
|
yield Symbol.for("gensync:v1:start");
|
|
// Should be "yield*" for no error.
|
yield {};
|
});
|
|
try {
|
await fn.async();
|
|
throwTestError();
|
} catch (err) {
|
expect(err.message).toMatch(/Expected GENSYNC_SUSPEND, got {}/);
|
expect(err.code).toBe("GENSYNC_EXPECTED_SUSPEND");
|
}
|
});
|
|
test("yield suspend return", async () => {
|
const fn = gensync(function*() {
|
yield Symbol.for("gensync:v1:start");
|
|
// Should be "yield*" for no error.
|
return {};
|
});
|
|
try {
|
await fn.async();
|
|
throwTestError();
|
} catch (err) {
|
expect(err.message).toMatch(/Unexpected generator completion/);
|
expect(err.code).toBe("GENSYNC_EXPECTED_SUSPEND");
|
}
|
});
|
});
|
|
describe("gensync.all()", () => {
|
test("success", async () => {
|
const fn = gensync(function*() {
|
const result = yield* gensync.all([doSuccess(), doSuccess()]);
|
|
expect(result).toEqual([42, 42]);
|
});
|
|
await expectResult(fn, undefined, {
|
value: undefined,
|
expectSync: true,
|
syncErrback: false,
|
});
|
});
|
|
test("error first", async () => {
|
const fn = gensync(function*() {
|
yield* gensync.all([doError(), doSuccess()]);
|
});
|
|
await expectResult(fn, undefined, {
|
error: DID_ERROR,
|
expectSync: true,
|
syncErrback: false,
|
});
|
});
|
|
test("error last", async () => {
|
const fn = gensync(function*() {
|
yield* gensync.all([doSuccess(), doError()]);
|
});
|
|
await expectResult(fn, undefined, {
|
error: DID_ERROR,
|
expectSync: true,
|
syncErrback: false,
|
});
|
});
|
|
test("empty list", async () => {
|
const fn = gensync(function*() {
|
yield* gensync.all([]);
|
});
|
|
await expectResult(fn, undefined, {
|
value: undefined,
|
expectSync: true,
|
syncErrback: false,
|
});
|
});
|
});
|
|
describe("gensync.race()", () => {
|
test("success", async () => {
|
const fn = gensync(function*() {
|
const result = yield* gensync.race([doSuccess(), doError()]);
|
|
expect(result).toEqual(42);
|
});
|
|
await expectResult(fn, undefined, {
|
value: undefined,
|
expectSync: true,
|
syncErrback: false,
|
});
|
});
|
|
test("error", async () => {
|
const fn = gensync(function*() {
|
yield* gensync.race([doError(), doSuccess()]);
|
});
|
|
await expectResult(fn, undefined, {
|
error: DID_ERROR,
|
expectSync: true,
|
syncErrback: false,
|
});
|
});
|
});
|
