fix: 🐛 issue with graceful closing the process

When a user requests to quit the presentation, it used process.exit()
which is not a best way to do that. This commit replaces it with
process.stdin.pause() so it can gracefully shutdown and exit the process
because there are no more listeners to handle.

.vscode/launch.json

@@ -1,14 +1,13 @@
 {
-  // Use IntelliSense to learn about possible attributes.
-  // Hover to view descriptions of existing attributes.
-  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
   "version": "0.2.0",
   "configurations": [
     {
       "type": "node",
       "request": "launch",
       "name": "Jest (Current File)",
       "program": "${workspaceFolder}/node_modules/.bin/jest",
+      "runtimeExecutable": "~/.config/nvm/13.11.0/bin/node",
+      "console": "integratedTerminal",
       "args": [
         "${relativeFile}",
         "--coverage",

src/kittik-deck/spec/Deck.spec.ts

@@ -3,51 +3,59 @@ import { Deck, DeckDeclaration } from '../src/Deck';
 
 const DECK_DECLARATION: DeckDeclaration = {
   cursor: Canvas.create(),
-  shapes: [{
-    name: 'Global Shape',
-    type: 'Text',
-    options: {
-      text: 'Hello, World!'
+  shapes: [
+    {
+      name: 'Global Shape',
+      type: 'Text',
+      options: {
+        text: 'Hello, World!'
+      }
     }
-  }],
-  animations: [{
-    name: 'Global Animation',
-    type: 'Print',
-    options: {
-      duration: 1
+  ],
+  animations: [
+    {
+      name: 'Global Animation',
+      type: 'Print',
+      options: {
+        duration: 1
+      }
     }
-  }],
-  slides: [{
-    shapes: [],
-    order: [{
-      shape: 'Global Shape',
-      animations: [
-        'Global Animation'
-      ]
-    }]
-  }]
+  ],
+  slides: [
+    {
+      shapes: [],
+      order: [{
+        shape: 'Global Shape',
+        animations: [
+          'Global Animation'
+        ]
+      }]
+    },
+    {
+      shapes: [],
+      order: [{
+        shape: 'Global Shape',
+        animations: [
+          'Global Animation'
+        ]
+      }]
+    }
+  ]
 };
 
-describe.skip('Deck', () => {
-  it('Should properly render next slide', async () => {
+describe('Deck', () => {
+  it('Should properly render next and previous slides', async () => {
     const deck = new Deck(DECK_DECLARATION);
     const renderSpy = jest.spyOn(deck, 'renderSlide').mockResolvedValue();
 
     await deck.nextSlide();
-    deck.exit();
-
-    expect(renderSpy).toBeCalledTimes(1);
-    expect(renderSpy).toBeCalledWith(0);
-  });
-
-  it('Should properly render previous slide', async () => {
-    const deck = new Deck(DECK_DECLARATION);
-    const renderSpy = jest.spyOn(deck, 'renderSlide').mockResolvedValue();
-
+    await deck.nextSlide();
+    await deck.previousSlide();
     await deck.previousSlide();
     deck.exit();
 
-    expect(renderSpy).toBeCalledTimes(1);
+    expect(renderSpy).toBeCalledTimes(2);
     expect(renderSpy).toBeCalledWith(0);
+    expect(renderSpy).toBeCalledWith(1);
   });
 });

src/kittik-deck/src/Deck.ts

@@ -78,7 +78,8 @@ export class Deck {
   }
 
   exit(): void {
+    process.stdin.pause();
+
     this.cursor.showCursor().restoreScreen().reset();
-    process.stdin.removeAllListeners();
   }
 }