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svelte/test/runtime/index.js

270 lines
6.1 KiB

import * as assert from "assert";
import * as path from "path";
import * as fs from "fs";
import { rollup } from 'rollup';
import * as virtual from 'rollup-plugin-virtual';
import { clear_loops, flush, set_now, set_raf } from "../../internal";
import {
showOutput,
loadConfig,
loadSvelte,
env,
setupHtmlEqual
} from "../helpers.js";
let svelte$;
let svelte;
let compileOptions = null;
let compile = null;
const sveltePath = process.cwd().split('\\').join('/');
let unhandled_rejection = false;
process.on('unhandledRejection', err => {
unhandled_rejection = err;
});
describe("runtime", () => {
before(() => {
svelte = loadSvelte(false);
svelte$ = loadSvelte(true);
require.extensions[".svelte"] = function(module, filename) {
const options = Object.assign({
filename,
format: 'cjs',
sveltePath
}, compileOptions);
const { js: { code } } = compile(fs.readFileSync(filename, "utf-8"), options);
return module._compile(code, filename);
};
return setupHtmlEqual();
});
const failed = new Set();
function runTest(dir, hydrate) {
if (dir[0] === ".") return;
const config = loadConfig(`./runtime/samples/${dir}/_config.js`);
if (hydrate && config.skip_if_hydrate) return;
if (config.solo && process.env.CI) {
throw new Error("Forgot to remove `solo: true` from test");
}
(config.skip ? it.skip : config.solo ? it.only : it)(`${dir} ${hydrate ? '(with hydration)' : ''}`, () => {
if (failed.has(dir)) {
// this makes debugging easier, by only printing compiled output once
throw new Error('skipping test, already failed');
}
unhandled_rejection = null;
compile = (config.preserveIdentifiers ? svelte : svelte$).compile;
const cwd = path.resolve(`test/runtime/samples/${dir}`);
compileOptions = config.compileOptions || {};
compileOptions.sveltePath = sveltePath;
compileOptions.hydratable = hydrate;
compileOptions.immutable = config.immutable;
compileOptions.accessors = 'accessors' in config ? config.accessors : true;
Object.keys(require.cache)
.filter(x => x.endsWith('.svelte'))
.forEach(file => {
delete require.cache[file];
});
let mod;
let SvelteComponent;
let unintendedError = null;
const window = env();
return Promise.resolve()
.then(() => {
// hack to support transition tests
clear_loops();
const raf = {
time: 0,
callback: null,
tick: now => {
raf.time = now;
if (raf.callback) raf.callback();
}
};
set_now(() => raf.time);
set_raf(cb => {
raf.callback = () => {
raf.callback = null;
cb();
flush();
};
});
try {
mod = require(`./samples/${dir}/main.svelte`);
SvelteComponent = mod.default;
} catch (err) {
showOutput(cwd, compileOptions, compile); // eslint-disable-line no-console
throw err;
}
if (config.before_test) config.before_test();
// Put things we need on window for testing
window.SvelteComponent = SvelteComponent;
const target = window.document.querySelector("main");
const warnings = [];
const warn = console.warn;
console.warn = warning => {
warnings.push(warning);
};
const options = Object.assign({}, {
target,
hydrate,
props: config.props,
intro: config.intro
}, config.options || {});
const component = new SvelteComponent(options);
console.warn = warn;
if (config.error) {
unintendedError = true;
throw new Error("Expected a runtime error");
}
if (config.warnings) {
assert.deepEqual(warnings, config.warnings);
} else if (warnings.length) {
unintendedError = true;
throw new Error("Received unexpected warnings");
}
if (config.html) {
assert.htmlEqual(target.innerHTML, config.html);
}
if (config.test) {
return Promise.resolve(config.test({
assert,
component,
mod,
target,
window,
raf
})).then(() => {
component.$destroy();
if (unhandled_rejection) {
throw unhandled_rejection;
}
});
} else {
component.$destroy();
assert.htmlEqual(target.innerHTML, "");
if (unhandled_rejection) {
throw unhandled_rejection;
}
}
})
.catch(err => {
if (config.error && !unintendedError) {
if (typeof config.error === 'function') {
config.error(assert, err);
} else {
assert.equal(config.error, err.message);
}
} else {
failed.add(dir);
showOutput(cwd, compileOptions, compile); // eslint-disable-line no-console
throw err;
}
})
.then(() => {
if (config.show) {
showOutput(cwd, compileOptions, compile);
}
flush();
if (config.after_test) config.after_test();
});
});
}
fs.readdirSync("test/runtime/samples").forEach(dir => {
runTest(dir, false);
runTest(dir, true);
});
async function create_component(src = '<div></div>') {
const { js } = svelte$.compile(src, {
format: "esm",
name: "SvelteComponent",
dev: true
});
const bundle = await rollup({
input: 'main.js',
plugins: [
virtual({
'main.js': js.code
}),
{
name: 'svelte-packages',
resolveId: (importee, importer) => {
if (importee.startsWith('svelte/')) {
return importee.replace('svelte', process.cwd()) + '/index.mjs';
}
}
}
]
});
const result = await bundle.generate({
format: 'iife',
name: 'App'
});
return eval(
`(function () { ${result.output[0].code}; return App; }())`
);
}
it("fails if options.target is missing in dev mode", async () => {
const App = await create_component();
assert.throws(() => {
new App();
}, /'target' is a required option/);
});
it("fails if options.hydrate is true but the component is non-hydratable", async () => {
const App = await create_component();
assert.throws(() => {
new App({
target: { childNodes: [] },
hydrate: true
});
}, /options.hydrate only works if the component was compiled with the `hydratable: true` option/);
});
});