Add test setup

cmd/txqr-tester/app/session.go

@@ -18,6 +18,9 @@ const (
 type Session struct {
 	state  SessionState
 	config SessionConfig
+
+	tests []*testSetup
+	idx   int // current test index
 }
 
 // NewSession inits new test session.
@@ -28,6 +31,56 @@ func NewSession() *Session {
 	}
 }
 
+// StartNext starts next round of testing. It returns
+// next untested parameters for QR code.
+func (s *Session) StartNext() (*testSetup, bool) {
+	if s.state == StateNew {
+		s.state = StateStarted
+
+		// generate parameters set, so they can't be changed during test
+		s.tests = s.generateTestsSetup()
+	}
+
+	if s.idx == len(s.tests) {
+		s.state = StateFinished
+		return nil, false
+	}
+
+	test := s.tests[s.idx]
+	s.idx++
+	return test, true
+}
+
+func (s *Session) generateTestsSetup() []*testSetup {
+	var ret []*testSetup
+	for _, lvl := range AllQRLevels {
+		if s.config.Levels[lvl] == false {
+			continue
+		}
+		for fps := s.config.StartFPS; fps < s.config.StopFPS; fps++ {
+			for sz := s.config.StartSize; sz < s.config.StopSize; sz += s.config.SizeStep {
+				ret = append(ret, newTestSetup(fps, sz, lvl))
+			}
+		}
+	}
+	return ret
+}
+
+// testSetup represents setup parameters for the single test round.
+type testSetup struct {
+	FPS   int
+	Size  int
+	Level qr.RecoveryLevel
+}
+
+func newTestSetup(fps, sz int, lvl qr.RecoveryLevel) *testSetup {
+	return &testSetup{
+		FPS:   fps,
+		Size:  sz,
+		Level: lvl,
+	}
+}
+
 // SessionConfig holds configuration values for initiating the session.
 type SessionConfig struct {
 	StartFPS, StopFPS   int    // FPS of QR animation

cmd/txqr-tester/app/session_test.go

@@ -0,0 +1,12 @@
+package main
+
+import "testing"
+
+func TestGenerateTests(t *testing.T) {
+	sess := NewSession()
+	got := sess.generateTestsSetup()
+	expectedLen := 988
+	if len(got) != expectedLen {
+		t.Fatalf("Expected len to be %d, but got %d", expectedLen, got)
+	}
+}

cmd/txqr-tester/app/ws.go

@@ -42,7 +42,7 @@ func (w *WSClient) talkToBackend() {
 		buf := make([]byte, 1024)
 		n, err := conn.Read(buf)
 		if err != nil {
-			log.Println("[ERROR] Reading from websocket: %v", err)
+			log.Printf("[ERROR] Reading from websocket: %v", err)
 			break
 		}
 
@@ -65,7 +65,9 @@ func (w *WSClient) processWSCommand(data []byte) {
 		w.app.SetConnected(true)
 		w.sendMsg(&ws.UIResponse{Type: ws.Ack})
 	case ws.CmdStartNext:
-		log.Println("Got start_next")
+		log.Println("Got start_nextx")
+		setup, _ := w.app.session.StartNext()
+		log.Println("Config:", setup)
 		// start animation
 	case ws.CmdResult:
 		log.Println("Got result")