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我的目标是让我的单元测试易于理解。目前，它们很难理解，因为它们有很多嵌套函数。

我想使用 build_runner 生成单元的代码，其中所有功能都展开。

所以这是我当前测试的一个例子：

测试.dart

import 'package:example_usage/src/unwrap.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:mockito/mockito.dart';

class Cat {
  String sound() => "Meow";
  int walk() => 4;
}

class Dog {
  final Cat cat;

  Dog(this.cat);

  String sayHi() {
    return this.cat.sound();
  }

  int jump() {
    return this.cat.walk();
  }
}

class MockCat extends Mock implements Cat {}

void main() {
  MockCat cat;
  Dog dog;

  @UnWrap()
  void setupCatSoundStub() {
    when(cat.sound()).thenReturn("Woof");
  }

  @UnWrap()
  void setupCatWalkstub() {
    when(cat.walk()).thenReturn(2);
  }

  @UnWrap()
  void expectCatCalled() {
    verify(cat.sound());
  }

  @UnWrap()
  void testDogWoof() {
    setupCatSoundStub();
    dog = Dog(cat);
    final sound = dog.sayHi();
    expect(sound, "Woof");
    expectCatCalled();
  }

  void expectCatWalked() {
    verify(cat.walk());
  }

  group('Dog Cat Play', () {
    setUp(() {
      cat = MockCat();
    });

    test('Dog woof', () {
      testDogWoof();
    });

    test('Dog woof then jump', () {
      testDogWoof();
      setupCatWalkstub();
      final steps = dog.jump();
      expect(steps, 2);
      expectCatWalked();
    });
  });
}

我想生成这样的代码

_$test.dart

void _$main() {
  MockCat cat;
  Dog dog;
  void expectCatWalked() {
    verify(cat.walk());
  }

  group('Dog Cat Play', () {
    setUp(() {
      cat = MockCat();
    });

    test('Dog woof', () {
      // testDogWoof();
      // setupCatSoundStub();
      when(cat.sound()).thenReturn("Woof");
      dog = Dog(cat);
      final sound = dog.sayHi();
      expect(sound, "Woof");
      // expectCatCalled();
      verify(cat.sound());
    });

    test('Dog woof then jump', () {
      // testDogWoof();
      // setupCatSoundStub();
      when(cat.sound()).thenReturn("Woof");
      dog = Dog(cat);
      final sound = dog.sayHi();
      expect(sound, "Woof");
      // expectCatCalled();
      verify(cat.sound());
      // setupCatWalkstub();
      when(cat.walk()).thenReturn(2);
      final steps = dog.jump();
      expect(steps, 2);
      expectCatWalked();
    });
  });
}

我在网上找到了一些教程，但我可以找到关于将函数体转换为字符串的文档（有些像 JavaScript 的Function.prototype.toString()方法）我是代码生成的新手，所以我尝试打印所有字段，但我找不到类似的东西。

import 'dart:async';

import 'package:analyzer/dart/element/element.dart';
import 'package:build/build.dart';
import 'package:source_gen/source_gen.dart';

class InfoGenerator extends Generator {
  @override
  FutureOr<String> generate(LibraryReader library, BuildStep buildStep) {
    var buffer = StringBuffer();

    // library.allElements.forEach((element) {
    //   buffer.writeln(
    //       '// ${element.displayName} - ${element.source.fullName} - ${element.declaration}');
    // });
    library.allElements.whereType<TopLevelVariableElement>().forEach((element) {
      buffer.writeln('/*');
      buffer.writeln(element.toString());
      buffer.writeln('*/');
      buffer.writeln(
          '// ${element.name} - ${element.kind.displayName} - ${element.declaration}');
    });

    return buffer.toString();
  }
}

我也是注释的新手，所以我只是做了这个

/// What to do here ?
class UnWrap {
  const UnWrap();
}

我想要做的甚至可能吗？

4

0 回答 0