Add Playwright Python test generation custom instructions (#151)

* Add Playwright Python test generation custom instructions

* Add best practice for assertion style in Playwright Python instructions

* Add Playwright Python test generation instructions to README

README.md

@@ -59,6 +59,7 @@ Team and project-specific instructions to enhance GitHub Copilot's behavior for
 | [Code Generation Guidelines](instructions/nodejs-javascript-vitest.instructions.md) | Guidelines for writing Node.js and JavaScript code with Vitest testing | [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fnodejs-javascript-vitest.instructions.md) [![Install in VS Code](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://insiders.vscode.dev/redirect?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fnodejs-javascript-vitest.instructions.md) |
 | [Object Calisthenics Rules](instructions/object-calisthenics.instructions.md) | Enforces Object Calisthenics principles for business domain code to ensure clean, maintainable, and robust code | [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fobject-calisthenics.instructions.md) [![Install in VS Code](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://insiders.vscode.dev/redirect?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fobject-calisthenics.instructions.md) |
 | [Performance Optimization Best Practices](instructions/performance-optimization.instructions.md) | The most comprehensive, practical, and engineer-authored performance optimization instructions for all languages, frameworks, and stacks. Covers frontend, backend, and database best practices with actionable guidance, scenario-based checklists, troubleshooting, and pro tips. | [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fperformance-optimization.instructions.md) [![Install in VS Code](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://insiders.vscode.dev/redirect?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fperformance-optimization.instructions.md) |
+| [Playwright Python Test Generation Instructions](instructions/playwright-python.instructions.md) | Playwright Python AI test generation instructions based on official documentation. | [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fplaywright-python.instructions.md) [![Install in VS Code](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://insiders.vscode.dev/redirect?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fplaywright-python.instructions.md) |
 | [Playwright Typescript](instructions/playwright-typescript.instructions.md) | Playwright test generation instructions | [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fplaywright-typescript.instructions.md) [![Install in VS Code](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://insiders.vscode.dev/redirect?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fplaywright-typescript.instructions.md) |
 | [Power Platform Connectors Schema Development Instructions](instructions/power-platform-connector.instructions.md) | Comprehensive development guidelines for Power Platform Custom Connectors using JSON Schema definitions. Covers API definitions (Swagger 2.0), API properties, and settings configuration with Microsoft extensions. | [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fpower-platform-connector.instructions.md) [![Install in VS Code](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://insiders.vscode.dev/redirect?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fpower-platform-connector.instructions.md) |
 | [PowerShell Pester v5 Testing Guidelines](instructions/powershell-pester-5.instructions.md) | PowerShell Pester testing best practices based on Pester v5 conventions | [![Install in VS Code](https://img.shields.io/badge/VS_Code-Install-0098FF?style=flat-square&logo=visualstudiocode&logoColor=white)](https://vscode.dev/redirect?url=vscode%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fpowershell-pester-5.instructions.md) [![Install in VS Code](https://img.shields.io/badge/VS_Code_Insiders-Install-24bfa5?style=flat-square&logo=visualstudiocode&logoColor=white)](https://insiders.vscode.dev/redirect?url=vscode-insiders%3Achat-instructions%2Finstall%3Furl%3Dhttps%3A%2F%2Fraw.githubusercontent.com%2Fgithub%2Fawesome-copilot%2Fmain%2Finstructions%2Fpowershell-pester-5.instructions.md) |

instructions/playwright-python.instructions.md

@@ -0,0 +1,62 @@
+---
+description: 'Playwright Python AI test generation instructions based on official documentation.'
+applyTo: '**'
+---
+
+# Playwright Python Test Generation Instructions
+
+## Test Writing Guidelines
+
+### Code Quality Standards
+- **Locators**: Prioritize user-facing, role-based locators (get_by_role, get_by_label, get_by_text) for resilience and accessibility.
+- **Assertions**: Use auto-retrying web-first assertions via the expect API (e.g., expect(page).to_have_title(...)). Avoid expect(locator).to_be_visible() unless specifically testing for a change in an element's visibility, as more specific assertions are generally more reliable.
+- **Timeouts**: Rely on Playwright's built-in auto-waiting mechanisms. Avoid hard-coded waits or increased default timeouts.
+- **Clarity**: Use descriptive test titles (e.g., def test_navigation_link_works():) that clearly state their intent. Add comments only to explain complex logic, not to describe simple actions like "click a button."
+
+### Test Structure
+- **Imports**: Every test file should begin with from playwright.sync_api import Page, expect.
+- **Fixtures**: Use the page: Page fixture as an argument in your test functions to interact with the browser page.
+- **Setup**: Place navigation steps like page.goto() at the beginning of each test function. For setup actions shared across multiple tests, use standard Pytest fixtures.
+
+### File Organization
+- **Location**: Store test files in a dedicated tests/ directory or follow the existing project structure.
+- **Naming**: Test files must follow the test_<feature-or-page>.py naming convention to be discovered by Pytest.
+- **Scope**: Aim for one test file per major application feature or page.
+
+## Assertion Best Practices
+- **Element Counts**: Use expect(locator).to_have_count() to assert the number of elements found by a locator.
+- **Text Content**: Use expect(locator).to_have_text() for exact text matches and expect(locator).to_contain_text() for partial matches.
+- **Navigation**: Use expect(page).to_have_url() to verify the page URL.
+- **Assertion Style**: Prefer `expect` over `assert` for more reliable UI tests.
+
+
+## Example
+
+```python
+import re
+import pytest
+from playwright.sync_api import Page, expect
+
+@pytest.fixture(scope="function", autouse=True)
+def before_each_after_each(page: Page):
+    # Go to the starting url before each test.
+    page.goto("https://playwright.dev/")
+
+def test_main_navigation(page: Page):
+    expect(page).to_have_url("https://playwright.dev/")
+
+def test_has_title(page: Page):
+    # Expect a title "to contain" a substring.
+    expect(page).to_have_title(re.compile("Playwright"))
+
+def test_get_started_link(page: Page):
+    page.get_by_role("link", name="Get started").click()
+    
+    # Expects page to have a heading with the name of Installation.
+    expect(page.get_by_role("heading", name="Installation")).to_be_visible()
+```
+
+## Test Execution Strategy
+
+1. **Execution**: Tests are run from the terminal using the pytest command.
+2. **Debug Failures**: Analyze test failures and identify root causes