Normalize internal/client/*_test.go

* Adjust test style for easy reading, by using literals instead of vars
* Move comparison to the `bytes` domain, instead of `string`
* Simplify testing code by using bytes.Buffer directly
* More consistent naming of variables and dummies (HANDLE_{FOO,BAR,BAD})
* Consistent testing style of gock.IsDone()
* Stick to 80-column

internal/client/get.go

@@ -7,7 +7,7 @@ import (
 )
 
 // GetData will perform the request and write the results on the provided writer
-func GetData(host, id, path string, wr io.Writer) error {
+func GetData(host, id, path string, w io.Writer) error {
 	url := host + "/handlers/" + id + path
-	return http.Get(url, "", nil, wr)
+	return http.Get(url, "", nil, w)
 }