package ankersolix

import (
	"errors"
	"strings"
	"testing"
)

// The frame nobody can read is the one worth logging, so its bytes have to be in
// the line — that is the whole of what a capture is.
func TestFrameLogLineCarriesTheBytes(t *testing.T) {
	data := []byte{0xff, 0x09, 0x01, 0x02}
	line := frameLogLine("EVSN1", "dt/app/A5191/EVSN1/x", data, "", nil, errors.New("bad marker"))
	if !strings.Contains(line, "hex=ff090102") {
		t.Errorf("unreadable frame: %q, want the bytes in it", line)
	}
	if !strings.Contains(line, "unreadable=") || !strings.Contains(line, "EVSN1") {
		t.Errorf("unreadable frame: %q, want the reason and the serial", line)
	}

	line = frameLogLine("EVSN1", "t", data, "0857", map[string]any{"a": 1}, nil)
	if !strings.Contains(line, "type=0857") || !strings.Contains(line, "fields=1") {
		t.Errorf("readable frame: %q, want its type and field count", line)
	}
}

// One long frame must not fill a log file.
func TestFrameLogLineCapsTheHex(t *testing.T) {
	line := frameLogLine("EVSN1", "t", make([]byte, 4096), "0410", nil, nil)
	if len(line) > 1400 {
		t.Errorf("line is %d chars, want it capped", len(line))
	}
	if !strings.Contains(line, "...") {
		t.Error("a truncated frame should say so")
	}
}
