flow like the river

BACK_BACK/node_modules/@parcel/watcher/test/options.js

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+const Watcher = require('../index');
+const fs = require('@parcel/fs');
+const path = require('path');
+const assert = require('assert');
+const {sleep} = require('@parcel/test-utils');
+
+describe('options', function() {
+  let tmpFolder = path.join(__dirname, './tmp/');
+
+  before(() => {
+    fs.mkdirp(tmpFolder);
+  });
+
+  it('Should pass init options with correct ignored regex', async () => {
+    let watcher = new Watcher({
+      ignored: /file/
+    });
+
+    let filepath = path.join(tmpFolder, 'file1.txt');
+    await fs.writeFile(filepath, 'this is a text document');
+
+    watcher.add(filepath);
+
+    let changed = false;
+    watcher.once('change', () => {
+      changed = true;
+    });
+
+    if (!watcher.ready) {
+      await new Promise(resolve => watcher.once('ready', resolve));
+    }
+
+    await sleep(250);
+
+    await fs.writeFile(filepath, 'this is not a text document');
+
+    await sleep(500);
+
+    assert(!changed, 'File should not be flagged as changed.');
+
+    await watcher.stop();
+  });
+
+  it('Should pass init options with a more complex ignored regex', async () => {
+    let watcher = new Watcher({
+      ignored: /file|config/
+    });
+
+    let filepaths = [
+      path.join(tmpFolder, 'file1.txt'),
+      path.join(tmpFolder, 'config.json')
+    ];
+
+    for (let filepath of filepaths) {
+      await fs.writeFile(filepath, 'this is a text document');
+
+      watcher.add(filepath);
+    }
+
+    let changed = false;
+    watcher.once('change', () => {
+      changed = true;
+    });
+
+    if (!watcher.ready) {
+      await new Promise(resolve => watcher.once('ready', resolve));
+    }
+
+    await sleep(250);
+
+    for (let filepath of filepaths) {
+      await fs.writeFile(filepath, 'this is not a text document');
+
+      watcher.add(filepath);
+    }
+
+    await sleep(500);
+
+    assert(!changed, 'File should not be flagged as changed.');
+
+    await watcher.stop();
+  });
+
+  it('Should not ignore any files outside of the regex', async () => {
+    let watcher = new Watcher({
+      ignored: /file|config/
+    });
+
+    let filepaths = [
+      path.join(tmpFolder, 'file1.txt'),
+      path.join(tmpFolder, 'config.json'),
+      path.join(tmpFolder, 'something')
+    ];
+
+    for (let filepath of filepaths) {
+      await fs.writeFile(filepath, 'this is a text document');
+
+      watcher.add(filepath);
+    }
+
+    let changed = 0;
+    watcher.once('change', () => {
+      changed++;
+    });
+
+    if (!watcher.ready) {
+      await new Promise(resolve => watcher.once('ready', resolve));
+    }
+
+    await sleep(250);
+
+    for (let filepath of filepaths) {
+      await fs.writeFile(filepath, 'this is not a text document');
+
+      watcher.add(filepath);
+    }
+
+    await sleep(500);
+
+    assert.equal(changed, 1, 'One file should have changed once.');
+
+    await watcher.stop();
+  });
+});