walk: reflect value of struct

walk/walk.go

@@ -0,0 +1,11 @@
+package walk
+
+import (
+	"reflect"
+)
+
+func Walk(x interface{}, fn func(string)) {
+	val := reflect.ValueOf(x)
+	field := val.Field(0)
+	fn(field.String())
+}

walk/walk_test.go

@@ -0,0 +1,27 @@
+package walk
+
+import (
+	"testing"
+)
+
+func TestWalk(t *testing.T) {
+	t.Run("walk function test", func(t *testing.T) {
+		expected := "Chris"
+		var got []string
+
+		x := struct {
+			Name string
+		}{expected}
+
+		Walk(x, func(input string) {
+			got = append(got, input)
+		})
+
+		if len(got) != 1 {
+			t.Errorf("wrong number of function calls, got %d want %d", len(got), 1)
+		}
+		if got[0] != expected {
+			t.Errorf("got %q want %q", got[0], expected)
+		}
+	})
+}