public void TryCreateReturnValueParameterDescriptor_ReturnBindingPresent_ReturnsExpectedValue()
{
JObject json = new JObject
{
{ "type", "blob" },
{ "name", ScriptConstants.SystemReturnParameterBindingName },
{ "direction", "out" },
{ "path", "foo/bar" }
};
FunctionBinding functionBinding = TestHelpers.CreateTestBinding(json);
FunctionBinding[] bindings = new FunctionBinding[] { functionBinding };
ParameterDescriptor descriptor = null;
var result = DotNetFunctionDescriptorProvider.TryCreateReturnValueParameterDescriptor(typeof(string), bindings, out descriptor);
Assert.True(result);
Assert.Equal(ScriptConstants.SystemReturnParameterName, descriptor.Name);
Assert.True((descriptor.Attributes & ParameterAttributes.Out) != 0);
Assert.Equal(typeof(string).MakeByRefType(), descriptor.Type);
Assert.Equal(1, descriptor.CustomAttributes.Count);
result = DotNetFunctionDescriptorProvider.TryCreateReturnValueParameterDescriptor(typeof(Task <string>), bindings, out descriptor);
Assert.True(result);
Assert.Equal(ScriptConstants.SystemReturnParameterName, descriptor.Name);
Assert.True((descriptor.Attributes & ParameterAttributes.Out) != 0);
Assert.Equal(typeof(string).MakeByRefType(), descriptor.Type);
Assert.Equal(1, descriptor.CustomAttributes.Count);
// return type task means no return value
result = DotNetFunctionDescriptorProvider.TryCreateReturnValueParameterDescriptor(typeof(Task), bindings, out descriptor);
Assert.False(result);
}
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 void TryCreateReturnValueParameterDescriptor_NoReturnBinding_ReturnsExpectedValue()
{
JObject json = new JObject
{
{ "type", "httpTrigger" },
{ "name", "myInput" },
{ "direction", "in" }
};
FunctionBinding functionBinding = TestHelpers.CreateTestBinding(json);
FunctionBinding[] bindings = new FunctionBinding[] { functionBinding };
ParameterDescriptor descriptor = null;
var result = DotNetFunctionDescriptorProvider.TryCreateReturnValueParameterDescriptor(typeof(void), bindings, out descriptor);
Assert.False(result);
}
public void TryCreateReturnValueParameterDescriptor_ReturnBindingPresent_ReturnsExpectedValue()
{
JObject json = new JObject
{
{ "type", "blob" },
{ "name", ScriptConstants.SystemReturnParameterBindingName },
{ "direction", "out" },
{ "path", "foo/bar" }
};
FunctionBinding functionBinding = TestHelpers.CreateTestBinding(json);
FunctionBinding[] bindings = new FunctionBinding[] { functionBinding };
ParameterDescriptor descriptor = null;
var result = DotNetFunctionDescriptorProvider.TryCreateReturnValueParameterDescriptor(typeof(string), bindings, out descriptor);
Assert.True(result);
Assert.Equal(ScriptConstants.SystemReturnParameterName, descriptor.Name);
Assert.True((descriptor.Attributes & ParameterAttributes.Out) != 0);
Assert.Equal(typeof(string).MakeByRefType(), descriptor.Type);
Assert.Equal(1, descriptor.CustomAttributes.Count);
result = DotNetFunctionDescriptorProvider.TryCreateReturnValueParameterDescriptor(typeof(Task <string>), bindings, out descriptor);
Assert.True(result);
Assert.Equal(ScriptConstants.SystemReturnParameterName, descriptor.Name);
Assert.True((descriptor.Attributes & ParameterAttributes.Out) != 0);
Assert.Equal(typeof(string).MakeByRefType(), descriptor.Type);
Assert.Equal(1, descriptor.CustomAttributes.Count);
var ex = Assert.Throws <InvalidOperationException>(() =>
{
DotNetFunctionDescriptorProvider.TryCreateReturnValueParameterDescriptor(typeof(Task), bindings, out descriptor);
});
Assert.Equal($"{ScriptConstants.SystemReturnParameterBindingName} cannot be bound to return type {typeof(Task).Name}.", ex.Message);
}