Function TestExtractThreadInfoDecodesEncodedSubject

internal/relay/server_test.go:253–288

TestExtractThreadInfoDecodesEncodedSubject covers RFC 2047 encoded-word subjects like the ones SES emits for unicode characters. Storing the wire form leaked `=?utf-8?q?...?=` into list summaries, dashboards, and the CLI inbox — every consumer that didn't independently re-parse raw_message.

(t *testing.T)

// form leaked `=?utf-8?q?...?=` into list summaries, dashboards, and the CLI
// inbox — every consumer that didn't independently re-parse raw_message.
func TestExtractThreadInfoDecodesEncodedSubject(t *testing.T) {
	cases := []struct {
		name string
		raw  string
		want string
	}{
		{
			name: "Q-encoded em dash",
			raw:  "Message-Id: <x@send.e2a.dev>\r\nSubject: =?utf-8?q?e2a_MCP_e2e_=E2=80=94_HITL_approve_path?=\r\nFrom: a@b.com\r\nTo: c@d.com\r\n\r\nHi\r\n",
			want: "e2a MCP e2e — HITL approve path",
		},
		{
			name: "B-encoded utf-8",
			raw:  "Message-Id: <x@send.e2a.dev>\r\nSubject: =?utf-8?B?Y2Fmw6k=?=\r\nFrom: a@b.com\r\nTo: c@d.com\r\n\r\nHi\r\n",
			want: "café",
		},
		{
			name: "plain ASCII passes through untouched",
			raw:  "Message-Id: <x@send.e2a.dev>\r\nSubject: Plain ASCII\r\nFrom: a@b.com\r\nTo: c@d.com\r\n\r\nHi\r\n",
			want: "Plain ASCII",
		},
		{
			name: "malformed encoded-word falls back to raw",
			raw:  "Message-Id: <x@send.e2a.dev>\r\nSubject: =?utf-8?q?broken\r\nFrom: a@b.com\r\nTo: c@d.com\r\n\r\nHi\r\n",
			want: "=?utf-8?q?broken",
		},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			got := extractThreadInfo([]byte(tc.raw)).Subject
			if got != tc.want {
				t.Errorf("Subject = %q, want %q", got, tc.want)
			}
		})
	}
}

func TestSessionResetClearsThreadInfo(t *testing.T) {
	s := &session{