package cat

import "testing"

// The FTDX10 family writes a frequency in nine digits; everything before it —
// FTDX3000, FTDX5000, FTDX1200, FT-2000, FT-950, FT-450 — writes eight and
// answers a nine-digit SET with "?;". Reported from an FTDX3000: every FA
// command rejected, a radio that would not follow.
//
// The width is taken from the rig's own reply, so a model this backend has
// never heard of is right on the first read.
func TestYaesuFrequencyWidthIsLearnedFromTheRig(t *testing.T) {
	y := &Yaesu{}
	if got := y.freqWidth(); got != 9 {
		t.Errorf("before any reply the width is %d, want the modern 9", got)
	}

	y.learnFreqWidth("FA14074000;", "FA") // an FTDX3000
	if got := y.freqWidth(); got != 8 {
		t.Errorf("width %d after an eight-digit reply, want 8", got)
	}

	y.learnFreqWidth("FA014074000;", "FA") // and an FTDX10 on the next session
	if got := y.freqWidth(); got != 9 {
		t.Errorf("width %d after a nine-digit reply, want 9", got)
	}

	// Nothing that is not a frequency teaches anything: a rejection, a stray
	// frame or a reply from another command would otherwise set the format for
	// every command that follows.
	for _, junk := range []string{"?;", "FA;", "FB014074000;", "FA1407400X;", "FA1234567;", "FA123456789012;"} {
		before := y.freqWidth()
		y.learnFreqWidth(junk, "FA")
		if after := y.freqWidth(); after != before {
			t.Errorf("%q changed the width from %d to %d", junk, before, after)
		}
	}
}