good41898 commented on PR #1786:
URL: https://github.com/apache/tinkerpop/pull/1786#issuecomment-1219753208
To give an example of the issue, I have abstracted the gremlin-go driver
into an interface like this:
```
GremlinGoDriver interface {
Submit(traversalString string) (gremlingo.ResultSet, error)
Close()
}
```
Which contains the two methods of the driver that I use. While unit testing,
I am able to mock out any methods (like the Submit() and Close() method) as
long as the function signatures for the mocked methods match the signatures of
the actual methods. Where I am running into issues is when trying to mock
returned data from a `ResultSet` object. I am able to create a new struct
containing the result set so I can mock those methods (like the ResultSet.All()
method) as well, like this:
```
type MockResultSet struct {
ResultSet
}
func (m MockResultSet) All() ([]*Result, error) {
var res []*Result
return res
}
```
However, since the function signatures must match, this mocked All() method
must return a Result object, which I cannot assign data to as the result field
is non-exported.
Let me know if this is helpful/ makes sense. Thanks.
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