add tests

tests/Feature/DiffTest.php

@@ -0,0 +1,86 @@
+<?php
+
+use App\Contracts\PathsRepository;
+
+it('determines diff files', function () {
+    $paths = Mockery::mock(PathsRepository::class);
+
+    $paths
+        ->shouldReceive('diff')
+        ->with('main')
+        ->once()
+        ->andReturn([
+            base_path('tests/Fixtures/without-issues-laravel/file.php'),
+        ]);
+
+    $this->swap(PathsRepository::class, $paths);
+
+    [$statusCode, $output] = run('default', ['--diff' => 'main']);
+
+    expect($statusCode)->toBe(0)
+        ->and($output)
+        ->toContain('── Laravel', ' 1 file');
+});
+
+it('ignores the path argument', function () {
+    $paths = Mockery::mock(PathsRepository::class);
+
+    $paths
+        ->shouldReceive('diff')
+        ->once()
+        ->andReturn([
+            base_path('tests/Fixtures/without-issues-laravel/file.php'),
+        ]);
+
+    $this->swap(PathsRepository::class, $paths);
+
+    [$statusCode, $output] = run('default', [
+        '--diff' => 'main',
+        'path' => base_path(),
+    ]);
+
+    expect($statusCode)->toBe(0)
+        ->and($output)
+        ->toContain('── Laravel', ' 1 file');
+});
+
+it('does not abort when there are no diff files', function () {
+    $paths = Mockery::mock(PathsRepository::class);
+
+    $paths
+        ->shouldReceive('diff')
+        ->once()
+        ->andReturn([]);
+
+    $this->swap(PathsRepository::class, $paths);
+
+    [$statusCode, $output] = run('default', [
+        '--diff' => 'main',
+    ]);
+
+    expect($statusCode)->toBe(0)
+        ->and($output)
+        ->toContain('── Laravel', ' 0 files');
+});
+
+it('parses nested branch names', function () {
+    $paths = Mockery::mock(PathsRepository::class);
+
+    $paths
+        ->shouldReceive('diff')
+        ->with('origin/main')
+        ->once()
+        ->andReturn([
+            base_path('tests/Fixtures/without-issues-laravel/file.php'),
+        ]);
+
+    $this->swap(PathsRepository::class, $paths);
+
+    [$statusCode, $output] = run('default', [
+        '--diff' => 'origin/main',
+    ]);
+
+    expect($statusCode)->toBe(0)
+        ->and($output)
+        ->toContain('── Laravel', ' 1 file');
+});