test: add pre generation tests (#138)

brick/hooks/pubspec.yaml

@@ -7,4 +7,6 @@ dependencies:
   mason: ^0.1.0-dev.50
 
 dev_dependencies:
-  very_good_analysis: ^5.1.0
+  mocktail: ^1.0.0
+  test: ^1.19.2
+  very_good_analysis: ^5.1.0

brick/hooks/test/pre_gen_test.dart

@@ -0,0 +1,173 @@
+import 'package:mason/mason.dart';
+import 'package:mocktail/mocktail.dart';
+import 'package:test/test.dart';
+
+import '../pre_gen.dart' as pre_gen;
+
+class _MockHookContext extends Mock implements HookContext {}
+
+void main() {
+  group('pre_gen', () {
+    late HookContext context;
+
+    setUp(() {
+      context = _MockHookContext();
+    });
+
+    group('android variable', () {
+      const androidVariable = 'android';
+
+      test('is set to true if it is in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': [androidVariable],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[androidVariable], isTrue);
+      });
+
+      test('is set to false if it is not in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': <String>[],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[androidVariable], isFalse);
+      });
+    });
+
+    group('ios variable', () {
+      const iosVariable = 'ios';
+
+      test('is set to true if it is in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': [iosVariable],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[iosVariable], isTrue);
+      });
+
+      test('is set to false if it is not in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': <String>[],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[iosVariable], isFalse);
+      });
+    });
+
+    group('macos variable', () {
+      const macOsVariable = 'macos';
+
+      test('is set to true if it is in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': [macOsVariable],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[macOsVariable], isTrue);
+      });
+
+      test('is set to false if it is not in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': <String>[],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[macOsVariable], isFalse);
+      });
+    });
+
+    group('linux variable', () {
+      const linuxVariable = 'linux';
+
+      test('is set to true if it is in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': [linuxVariable],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[linuxVariable], isTrue);
+      });
+
+      test('is set to false if it is not in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': <String>[],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[linuxVariable], isFalse);
+      });
+    });
+
+    group('web variable', () {
+      const webVariable = 'web';
+
+      test('is set to true if it is in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': [webVariable],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[webVariable], isTrue);
+      });
+
+      test('is set to false if it is not in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': <String>[],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[webVariable], isFalse);
+      });
+    });
+
+    group('windows variable', () {
+      const windowsVariable = 'windows';
+
+      test('is set to true if it is in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': [windowsVariable],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[windowsVariable], isTrue);
+      });
+
+      test('is set to false if it is not in `platforms` variable', () {
+        final vars = <String, dynamic>{
+          'platforms': <String>[],
+        };
+        when(() => context.vars).thenReturn(vars);
+
+        pre_gen.run(context);
+
+        expect(vars[windowsVariable], isFalse);
+      });
+    });
+  });
+}