Add tests for disable method options.

This commit adds tests for the DisableMethods and DisablePointerMethods
options.  All combinations of method options and Stringer interface
invocation for both pointer receivers and non-pointer receivers are
tested.

1 files changed, 9 insertions, 0 deletions

diff --git a/spew/common_test.go b/spew/common_test.go
index f0119e6..4b786e6 100644
--- a/spew/common_test.go
+++ b/spew/common_test.go
@@ -20,6 +20,15 @@ import (
 	"fmt"
 )
 
+// custom type to test Stinger interface on non-pointer receiver.
+type stringer string
+
+// String implements the Stringer interface for testing invocation of custom
+// stringers on types with non-pointer receivers.
+func (s stringer) String() string {
+	return "stringer " + string(s)
+}
+
 // custom type to test Stinger interface on pointer receiver.
 type pstringer string