test: ✅ add the first E2E test and configuration to CI (#316)

* add tests

test/e2e/oneFile.test.ts

@@ -0,0 +1,56 @@
+import { resolve } from 'path'
+import { render } from 'cli-testing-library'
+import 'cli-testing-library/extend-expect';
+import { prepareEnvironment } from './utils';
+
+it('cli flow to generate commit message for 1 new file (staged)', async () => {
+  const { gitDir, cleanup } = await prepareEnvironment();
+
+  await render('echo' ,[`'console.log("Hello World");' > index.ts`], { cwd: gitDir });
+  await render('git' ,['add index.ts'], { cwd: gitDir });
+
+  const { queryByText, findByText, userEvent } = await render(`OCO_AI_PROVIDER='test' node`, [resolve('./out/cli.cjs')], { cwd: gitDir });
+
+  expect(await queryByText('No files are staged')).not.toBeInTheConsole();
+  expect(await queryByText('Do you want to stage all files and generate commit message?')).not.toBeInTheConsole();
+
+  expect(await findByText('Generating the commit message')).toBeInTheConsole();
+  expect(await findByText('Confirm the commit message?')).toBeInTheConsole();
+  userEvent.keyboard('[Enter]');
+
+  expect(await findByText('Do you want to run `git push`?')).toBeInTheConsole();
+  userEvent.keyboard('[Enter]');
+
+  expect(await findByText('Successfully pushed all commits to origin')).toBeInTheConsole();
+
+  await cleanup();
+});
+
+it('cli flow to generate commit message for 1 changed file (not staged)', async () => {
+  const { gitDir, cleanup } = await prepareEnvironment();
+
+  await render('echo' ,[`'console.log("Hello World");' > index.ts`], { cwd: gitDir });
+  await render('git' ,['add index.ts'], { cwd: gitDir });
+  await render('git' ,[`commit -m 'add new file'`], { cwd: gitDir });
+
+  await render('echo' ,[`'console.log("Good night World");' >> index.ts`], { cwd: gitDir });
+
+  const { findByText, userEvent } = await render(`OCO_AI_PROVIDER='test' node`, [resolve('./out/cli.cjs')], { cwd: gitDir });
+
+  expect(await findByText('No files are staged')).toBeInTheConsole();
+  expect(await findByText('Do you want to stage all files and generate commit message?')).toBeInTheConsole();
+  userEvent.keyboard('[Enter]');
+
+  expect(await findByText('Generating the commit message')).toBeInTheConsole();
+  expect(await findByText('Confirm the commit message?')).toBeInTheConsole();
+  userEvent.keyboard('[Enter]');
+
+  expect(await findByText('Successfully committed')).toBeInTheConsole();
+
+  expect(await findByText('Do you want to run `git push`?')).toBeInTheConsole();
+  userEvent.keyboard('[Enter]');
+
+  expect(await findByText('Successfully pushed all commits to origin')).toBeInTheConsole();
+
+  await cleanup();
+});