docs: 📝 update exercise instructions for clarity and consistency

Author: yjaaidi

docs/instructions/1-recipe-search.md

@@ -36,8 +36,8 @@ pnpm test
 
 ```ts
 it('...', async () => {
-    await renderComponent();
-})
+  await renderComponent();
+});
 ```
 
 #### 4. Query DOM and check that a burger and a pizza are displayed
@@ -56,7 +56,7 @@ The `RecipeSearch` component should display a list of recipes fetched from a rem
 
 ### 📝 Steps
 
-#### 1. Run tests:
+#### 1. Run tests
 
 ```sh
 pnpm test
@@ -68,7 +68,6 @@ Wait for the `recipes` property to contain a burger and a pizza.
 
 Cf. [📖 Appendices](#-appendices)
 
-
 #### 3. Checkout the implementation if you went with the TDD approach:
 
 ```sh

docs/instructions/2-test-doubles.md

@@ -12,7 +12,7 @@ Navigate to the second exercise:
 pnpm cook start 2-test-double
 ```
 
-## 🎯 Goal: Implement Test Doubles for Better Test Isolation
+## 🎯 Goal #1: Use test doubles to narrow down the exercised code
 
 In this exercise, you'll learn to use test doubles _(Fakes to be more specific)_ to make tests more reliable, faster, and independent of external dependencies like HTTP calls.
 
@@ -31,14 +31,18 @@ In this exercise, you'll learn to use test doubles _(Fakes to be more specific)_
 TestBed.inject(RecipeRepositoryFake).setRecipes(...);
 ```
 
-#### 3. Update Test Helper Functions
+#### 3. Update test helper functions
 
-#### 4. Run Tests
+#### 4. Run tests
 
 ```sh
 pnpm test
 ```
 
+## 🎯 Goal #2: `RecipeSearch` filters recipes by keywords
+
+Add a test that checks that `RecipeSearch` filters recipes by keywords when the user types keywords in an input labeled "Keywords".
+
 ## 📖 Appendices
 
 ### Object Mother

docs/instructions/3-refactor-signals.md

@@ -24,7 +24,7 @@ In this exercise, you'll modernize the `RecipeSearch` component by refactoring f
 pnpm cook checkout-impl
 ```
 
-#### 2. Run tests:
+#### 2. Run tests
 
 ```sh
 pnpm test

docs/instructions/4-vitest-browser.md

@@ -18,9 +18,9 @@ In this exercise, you'll learn to use Vitest's browser mode for testing componen
 
 ### 📝 Steps
 
-#### 1. Rename test from `recipe-search.ng.integration.spec.ts` to `recipe-search.ng.browser.spec.ts`
+#### 1. Rename test from `recipe-search.integration.spec.ts` to `recipe-search.browser.spec.ts`
 
-#### 2. Run tests:
+#### 2. Run tests
 
 ```sh
 pnpm test
@@ -34,8 +34,18 @@ import { page } from '@vitest/browser/context';
 await page.getByLabelText('Keywords').fill(keywords);
 ```
 
+#### 4. Figure out why the tests are failing
+
 ## 📖 Appendices
 
+### Asserting with Vitest Browser
+
+```ts
+const els = page.getByRole('...');
+await expect.poll(() => els.all()).toHaveLength(42);
+await expect.element(els.nth(30)).toHaveTextContent('...');
+```
+
 ### Visual Debugging
 
 For debugging browser tests: