How to assign key,value to map[interface{}]interface{}? - dictionary

Question

var cache atomic.Value
func setResToCache(res *utils.InterfaceMap) error {
resMap := res.ToInterfaceMap()
val := resMap[constant.key] // constant.key is a constant string
val, ok := val.(string)
if !ok {
return errors.New("type assertion failed")
}
someRes := model.someRes{
Title: val,
}
Cache.Store(someRes)
return nil
}
about utils.InterfaceMap
type InterfaceMap sync.Map
//ToInterfaceMap
func (im *InterfaceMap) ToInterfaceMap() map[interface{}]interface{} {
iim := make(map[interface{}]interface{})
m := (*sync.Map)(im)
m.Range(func(k, v interface{}) bool {
iim[k] = v
return true
})
return iim
}
I have some code similar to the above, and I have a problem when I want to write a unit test.
{
name: "test",
args: args{
res: &utils.InterfaceMap{
// How to assign k,v here
},
},
wantErr: false,
},
How to how to assign key,value to map[interface{}]interface{}?
It is actually map[string]string, so I use assert, but the parameter passed in is map[interface{}]interface{}.
I want to add some string: string to map so that I can successfully test the code.

Answer 1

Create simple function in your test file to input map[string]string and inside the function, write those values to sync.Map and cast it to InterfaceMap type and return the reference. Example is as below.
func createMockInterfaceMap(in map[string]string) *utils.InterfaceMap{
mockMap := sync.Map{}
for key, value := range in {
mockMap.Store(key, value)
}
iMap := utils.InterfaceMap(mockMap)
return &iMap
}
{
name: "test",
args: args{
res: createMockInterfaceMap(map[string]string{
`key1`:`value1`,
`key2`:`value2`,
}),
},
wantErr: false,
},

Answer 2

To pass in a map[interface{}]interface{}, it will need to be defined as such.
You can convert a map[string]string to a map[interface{}]interface{} using something like the following:
func MapConvert(mss map[string]string) map[interface{}]interface{} {
ifaceMap := map[interface{}]interface{}{}
for k, v := range mss {
ifaceMap[k] = v
}
return ifaceMap
}
Here's an example using a type definition:
type InterfaceMap map[interface{}]interface{}
func MapConvert(mss map[string]string) *InterfaceMap {
ifaceMap := InterfaceMap{}
for k, v := range mss {
ifaceMap[k] = v
}
return &ifaceMap
}
Here's a full running example:
https://play.golang.org/p/UPKqqZnFis-