Reflection type does not have method - reflection

Question

I'm trying to use reflection in Go. Why doesn't this code list the methods? It lists the fields.
is this the problem? value interface{} I'm not sure how to pass a generic struct/class/type to a function. Normally I would just pass an Object.
(I'm totally new at this. I'm a C# programmer)
package main
import (
"fmt"
"reflect"
)
func main() {
var B TestType = TestType{TestString: "Hello", TestNumber: 3}
ListMethods(B)
}
func ListMethods(value interface{}) {
fooType := reflect.TypeOf(value)
for i := 0; i < fooType.NumMethod(); i++ {
method := fooType.Method(i)
fmt.Println("Method = " + method.Name)
}
for i := 0; i < fooType.NumField(); i++ {
field := fooType.Field(i)
fmt.Println("Field = " + field.Name)
fmt.Println(reflect.ValueOf(value).Field(i))
}
}
type TestType struct {
TestString string
TestNumber int
}
func (this *TestType) TestFunction() {
fmt.Println("Test")
}

Answer 1

Because you are passing a type and you declared a method to the pointer of the type.
https://play.golang.org/p/B0NdVyxGxt
Look at this example extended from yours:
package main
import (
"fmt"
"reflect"
)
func main() {
var B TestType = TestType{TestString: "Hello", TestNumber: 3}
ListMethods(B)
}
func ListMethods(value interface{}) {
fooType := reflect.TypeOf(value)
ptrFooType := reflect.PtrTo(fooType)
for i := 0; i < fooType.NumMethod(); i++ {
method := fooType.Method(i)
fmt.Println("Method = " + method.Name)
}
for i := 0; i < ptrFooType.NumMethod(); i++ {
method := ptrFooType.Method(i)
fmt.Println("* Method = " + method.Name)
}
for i := 0; i < fooType.NumField(); i++ {
field := fooType.Field(i)
fmt.Println("Field = " + field.Name)
fmt.Println(reflect.ValueOf(value).Field(i))
}
}
type TestType struct {
TestString string
TestNumber int
}
func (this *TestType) TestFunctionPtr() {
fmt.Println("Test")
}
func (this TestType) TestFunction() {
fmt.Println("Test Non Ptr")
}
Notice how the *Type can access also the Type Methods. But Type cannot access to *Type Methods.
To convert from Type to *Type I have used the reflect.PtrTo(Type).