test: command test with test_process (#339)

Author: wasabeef

codecov.yaml

@@ -21,6 +21,6 @@ coverage:
         paths: null
 
 ignore:
-  - "example/"
+  - "examples/**/*"
   - "**/*.g.dart"
   - "**/*.gen.dart"

packages/command/bin/flutter_gen_command.dart

@@ -40,7 +40,7 @@ void main(List<String> args) {
     }
   } on FormatException catch (e) {
     stderr.writeAll(
-        <String>[e.message, 'usage: flutter_gen [options...] ', ''], '\n');
+        <String>[e.message, 'usage: flutter_gen [options...]', ''], '\n');
     return;
   }
 

packages/command/pubspec.yaml

@@ -18,4 +18,6 @@ dependencies:
   args: '>=2.0.0 <3.0.0'
 
 dev_dependencies:
+  test: '>=1.16.0 <2.0.0'
+  test_process: '>=2.0.0 <3.0.0'
   flutter_lints: '>=2.0.1 <3.0.0'

packages/command/test/flutter_gen_command_test.dart

@@ -0,0 +1,48 @@
+import 'package:flutter_gen_core/utils/version.dart';
+import 'package:test/test.dart';
+import 'package:test_process/test_process.dart';
+
+void main() {
+  test('Execute fluttergen', () async {
+    final process =
+        await TestProcess.start('dart', ['bin/flutter_gen_command.dart']);
+    expect(await process.stdout.next,
+        equals('$flutterGenVersion Loading ... command/pubspec.yaml'));
+    await process.shouldExit(0);
+  });
+
+  test('Execute fluttergen --config pubspec.yaml', () async {
+    var process = await TestProcess.start(
+        'dart', ['bin/flutter_gen_command.dart', '--config', 'pubspec.yaml']);
+    expect(await process.stdout.next,
+        equals('$flutterGenVersion Loading ... command/pubspec.yaml'));
+    await process.shouldExit(0);
+  });
+
+  test('Execute fluttergen --help', () async {
+    var process = await TestProcess.start(
+        'dart', ['bin/flutter_gen_command.dart', '--help']);
+    expect(await process.stdout.next,
+        equals('-c, --config          Set the path of pubspec.yaml.'));
+    final line = await process.stdout.next;
+    expect(line.trim(), equals('(defaults to "pubspec.yaml")'));
+    await process.shouldExit(0);
+  });
+
+  test('Execute fluttergen --version', () async {
+    var process = await TestProcess.start(
+        'dart', ['bin/flutter_gen_command.dart', '--version']);
+    expect(await process.stdout.next, equals(flutterGenVersion));
+    await process.shouldExit(0);
+  });
+
+  test('Execute wrong argments with fluttergen --wrong', () async {
+    var process = await TestProcess.start(
+        'dart', ['bin/flutter_gen_command.dart', '--wrong']);
+    expect(await process.stderr.next,
+        equals('Could not find an option named "wrong".'));
+    expect(
+        await process.stderr.next, equals('usage: flutter_gen [options...]'));
+    await process.shouldExit(0);
+  });
+}