make x.Parsed() return true after AddGoFlagSet(x) and pflag.Parse() (#162)

* make GoFlagSets.Parsed() true after pflag.Parse

some third part lib such as glog use go flag package, and its some
actions depends on if goflag.Parsed().

* add test case for goflag.CommandLine.Parsed()

* add comment to goflag.CommandLine.Parsed test case

1 files changed, 8 insertions, 0 deletions

diff --git a/golangflag_test.go b/golangflag_test.go
index 77e2d7d..5bd831b 100644
--- a/golangflag_test.go
+++ b/golangflag_test.go
@@ -36,4 +36,12 @@ func TestGoflags(t *testing.T) {
 	if getBool != true {
 		t.Fatalf("expected getBool=true but got getBool=%v", getBool)
 	}
+	if !f.Parsed() {
+		t.Fatal("f.Parsed() return false after f.Parse() called")
+	}
+
+	// in fact it is useless. because `go test` called flag.Parse()
+	if !goflag.CommandLine.Parsed() {
+		t.Fatal("goflag.CommandLine.Parsed() return false after f.Parse() called")
+	}
 }