Initial commit

internal/tui/tui_test.go

@@ -0,0 +1,49 @@
+package tui
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"strings"
+	"testing"
+	"time"
+
+	"billboard/internal/server"
+	"billboard/internal/state"
+)
+
+func TestFetchDecodesPixels(t *testing.T) {
+	st := state.New(8, 4)
+	if err := st.SetPixel(3, 2, 9); err != nil {
+		t.Fatal(err)
+	}
+	st.AddMessage("test msg")
+	srv := httptest.NewServer(server.New(st, server.Config{}).Handler())
+	defer srv.Close()
+
+	d := &Display{server: srv.URL, client: &http.Client{Timeout: 5 * time.Second}}
+	if err := d.fetch(); err != nil {
+		t.Fatal(err)
+	}
+	if got := d.state.Pixels[2][3]; got != 9 {
+		t.Fatalf("pixel = %d, want 9; state=%+v", got, d.state)
+	}
+	if len(d.state.Messages) != 1 || d.state.Messages[0].Text != "test msg" {
+		t.Fatalf("messages = %+v", d.state.Messages)
+	}
+
+	f, err := os.CreateTemp(t.TempDir(), "render")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer f.Close()
+	d.out = f
+	d.render()
+	data, err := os.ReadFile(f.Name())
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(string(data), "91") && !strings.Contains(string(data), "101") {
+		t.Fatalf("render output lacks color-9 SGR code; block count: %d", strings.Count(string(data), "▀"))
+	}
+}