我创建了一个流畅的构建器样式模式来帮助加载测试数据。某些方法的顺序很重要,并且想知道管理正确顺序的首选方法是什么。
我目前有以下情况:
using NUnit.Framework;
[TestFixture]
public class DataBuilderTests
{
[Test]
public void Can_NAME()
{
new DataLoader()
.Start() // must be called first
.Setup() // then called next
.LoadEmployees() // optional order not NB
.LoadProducts() // optional order not NB
.StartCleanup() // begin cleanup
.CleanupEmployees() // optional order not NB
.CleanupProducts() // optional order not NB
.End();
}
}
public class DataLoader
{
public DataBuilderSetup Start()
{
return new DataBuilderSetup(this);
}
}
public class DataBuilderSetup
{
private readonly DataLoader _dataLoader;
public DataBuilderSetup(DataLoader dataLoader)
{
_dataLoader = dataLoader;
}
public DataBuilderOptions Setup()
{
// do setup
return new DataBuilderOptions(_dataLoader);
}
}
public class DataBuilderOptions
{
private readonly DataLoader _dataLoader;
public DataBuilderOptions(DataLoader dataLoader)
{
_dataLoader = dataLoader;
}
public DataBuilderOptions LoadEmployees()
{
// load
return this;
}
public DataBuilderOptions LoadProducts()
{
// load
return this;
}
public DataBuilderCleanupOptions StartCleanup()
{
return new DataBuilderCleanupOptions(_dataLoader);
}
}
public class DataBuilderCleanupOptions
{
private readonly DataLoader _dataLoader;
public DataBuilderCleanupOptions(DataLoader dataLoader)
{
_dataLoader = dataLoader;
}
public DataBuilderCleanupOptions CleanupEmployees()
{
// cleanup
return this;
}
public DataBuilderCleanupOptions CleanupProducts()
{
// cleanup
return this;
}
public DataLoader End()
{
return _dataLoader;
}
}
在 Java 中(C# 及其多重继承不应使其有任何不同),您可以这样做:
声明一组仅包含一个方法的接口:
Interface DoFirstThing { // could be renamed to "BuilderOnStart" or "BuilderStartingState"
DoSecondThing doFirst();
}
Interface DoSecondThing {
DoLastThing doSecond();
}
Interface DoLastThing {
BuilderReady doLast();
}
Interface BuilderReady {
Result build();
}
class BuilderWithForcedSequence implements DoFirstThing, DoSecondThing, DoLastThing, BuilderReady {
// implement all
}
最后,您需要一些工厂或工厂方法来设置该构建器的初始状态:
public DoFirstThing createNewBuilderWithForcedSequence(requiredParameters){
return new BuilderWithForcedSequence(requiredParameters);
}
这将产生 Builder,强制排序构建方法(它们应该从doThat
到有意义的东西),只能调用doFirst()
, 在那之后doSecond()
...等等,直到最终状态,当对象将被构建时,使用build()
method.
Result result = builder.doFirst().doSecond().doLast().build();
EDIT:
哎呀,这正是你的方法:)
本文内容由网友自发贡献,版权归原作者所有,本站不承担相应法律责任。如您发现有涉嫌抄袭侵权的内容,请联系:hwhale#tublm.com(使用前将#替换为@)