public async Task Generate_WithReturnValue(string userFuncName, Type generatedMethodReturnType, string expectedResult)
{
var userFunc = this.GetType().GetMethod(userFuncName, BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
string functionName = "FunctionWithStrReturn";
Collection <ParameterDescriptor> parameters = new Collection <ParameterDescriptor>();
var userRetType = userFunc.ReturnType;
ParameterDescriptor returnParameter;
if (DotNetFunctionDescriptorProvider.TryCreateReturnValueParameterDescriptor(userRetType, new FunctionBinding[0], out returnParameter))
{
parameters.Add(returnParameter);
}
FunctionMetadata metadata = new FunctionMetadata();
var invoker = new RealInvoker(userFunc);
FunctionDescriptor function = new FunctionDescriptor(functionName, invoker, metadata, parameters, null, null, null);
Collection <FunctionDescriptor> functions = new Collection <FunctionDescriptor>();
functions.Add(function);
// generate the Type
Type functionType = FunctionGenerator.Generate("TestScriptHost", "TestFunctions", null, functions);
// verify the generated function
MethodInfo method = functionType.GetMethod(functionName);
IEnumerable <Attribute> attributes = functionType.GetCustomAttributes();
Assert.Empty(attributes);
ParameterInfo[] functionParams = method.GetParameters();
// One input parameter
Assert.Equal(0, functionParams.Length);
// The final generated function is always Task
Assert.Equal(generatedMethodReturnType, method.ReturnType);
// Verify that the method is invocable
var result = method.Invoke(null, new object[] { });
Task <object> taskResult = Unwrap(result);
var realResult = await taskResult;
Assert.Equal(expectedResult, realResult);
}
public static void Used()
{
//构建 命令主体
var add = new Add();
var del = new Del();
//设置命令执行参数主体
add.Receiver = new SqlServerDB();
del.Receiver = new OracleDB();
//构建命令执行者
var real = new RealInvoker();
//将命令添加到执行者
real.AddCmd(add);
real.AddCmd(del);
//执行命令
real.Invoke();
real.RollBack();
}
