test(config) add path assertion

config/config_test.go

 package config
 
 import (
-	"fmt"
 	"testing"
 )
 
 func TestConfig(t *testing.T) {
 	const filename = ".ipfsconfig"
+	const dsPath = "/path/to/datastore"
 	cfgWritten := new(Config)
+	cfgWritten.Datastore.Path = dsPath
 	err := WriteConfigFile(filename, cfgWritten)
 	if err != nil {
 		t.Error(err)
@@ -17,6 +18,7 @@ func TestConfig(t *testing.T) {
 		t.Error(err)
 		return
 	}
-
-	fmt.Printf(cfgRead.Datastore.Path)
+	if cfgWritten.Datastore.Path != cfgRead.Datastore.Path {
+		t.Fail()
+	}
 }