test: delay after initial add

Adds a small delay in some tests after the initial path has been added
(to avoid the FS de-duping/cancelling events).

test.mjs

@@ -411,11 +411,12 @@ const runTests = (baseopts) => {
     });
     it('should emit `unlinkDir` event when a directory was removed', async () => {
       const testDir = getFixturePath('subdir');
-      fs.mkdirSync(testDir, PERM_ARR);
       const spy = sinon.spy(function unlinkDirSpy(){});
+
+      await fs_mkdir(testDir, PERM_ARR);
+      await delay(300);
       watcher.on(EV.UNLINK_DIR, spy);
 
-      await delay();
       await fs_rmdir(testDir);
       await waitFor([spy]);
       spy.should.have.been.calledWith(testDir);
@@ -428,13 +429,17 @@ const runTests = (baseopts) => {
       const testDir2 = getFixturePath('subdir/subdir2');
       const testDir3 = getFixturePath('subdir/subdir2/subdir3');
       const spy = sinon.spy(function unlinkDirSpy(){});
+
+      await fs_mkdir(testDir, PERM_ARR);
+      await fs_mkdir(testDir2, PERM_ARR);
+      await fs_mkdir(testDir3, PERM_ARR);
+      await delay(300);
+
       watcher.on(EV.UNLINK_DIR, spy);
-      fs.mkdirSync(testDir, PERM_ARR);
-      fs.mkdirSync(testDir2, PERM_ARR);
-      fs.mkdirSync(testDir3, PERM_ARR);
-      await delay();
+
       await rimraf(testDir2);
       await waitFor([[spy, 2]]);
+
       spy.should.have.been.calledWith(testDir2);
       spy.should.have.been.calledWith(testDir3);
       expect(spy.args[0][1]).to.not.be.ok; // no stats
@@ -470,7 +475,7 @@ const runTests = (baseopts) => {
         .on(EV.UNLINK, unlinkSpy)
         .on(EV.ADD, addSpy)
         .on(EV.CHANGE, changeSpy);
-      fs.writeFileSync(testPath, 'hello');
+      await write(testPath, 'hello');
       await waitFor([[addSpy.withArgs(testPath), 1]]);
       unlinkSpy.should.not.have.been.called;
       changeSpy.should.not.have.been.called;
@@ -544,17 +549,16 @@ const runTests = (baseopts) => {
       const addSpy = sinon.spy(function addSpy(){});
       const testPath = getFixturePath('dirFile');
       await fs_mkdir(testPath, PERM_ARR);
+      await delay(300);
       watcher.on(EV.UNLINK_DIR, unlinkSpy).on(EV.ADD, addSpy);
 
-      await delay();
       await fs_rmdir(testPath);
-      await delay(300);
+      await waitFor([unlinkSpy]);
+
       await write(testPath, 'file content');
+      await waitFor([addSpy]);
 
-      await delay(300);
-      await waitFor([unlinkSpy]);
       unlinkSpy.should.have.been.calledWith(testPath);
-      await waitFor([addSpy]);
       addSpy.should.have.been.calledWith(testPath);
     });
     it('should emit `unlink` and `addDir` when file is replaced by dir', async () => {