chore: release v0.27.12

internal/rigctld/rigctld_test.go

@@ -332,3 +332,31 @@ func TestModeMapping(t *testing.T) {
 		}
 	}
 }
+
+// A mode the rig is already in must not reach it. WSJT-X restates the mode on
+// every band change, and on a native backend each restatement is several CI-V
+// round trips with the client blocked on the answer.
+func TestSetModeSkipsWhenUnchanged(t *testing.T) {
+	cases := []struct {
+		rig  string // what the rig reports (ADIF)
+		ask  string // what the client asks for (hamlib)
+		want int    // times the radio should be touched
+	}{
+		{"CW", "CW", 0},
+		{"SSB", "USB", 0},    // "SSB" is reported as USB to a client
+		{"FT8", "PKTUSB", 0}, // data rides on USB; both name it PKTUSB
+		{"USB", "PKTUSB", 1}, // out of data mode into it: a real change
+		{"CW", "USB", 1},     // a real change
+		{"", "USB", 1},       // mode unknown: never assume
+	}
+	for _, c := range cases {
+		f := &fakeRig{mode: c.rig, freq: 14074000}
+		s := New(4532, f, nil)
+		if got, _ := s.handle("M " + c.ask); got != "RPRT 0\n" {
+			t.Fatalf("set_mode %q on a rig in %q = %q", c.ask, c.rig, got)
+		}
+		if n := len(f.setModes); n != c.want {
+			t.Errorf("rig in %q, client asked %q: rig touched %d times, want %d", c.rig, c.ask, n, c.want)
+		}
+	}
+}