feat: add navigation and window size handlers with corresponding tests

internal/handlers/trackWindowSizeHandler_test.go

@@ -0,0 +1,51 @@
+package handlers_test
+
+import (
+	"testing"
+
+	"github.com/StevanFreeborn/term-tier/internal/handlers"
+	"github.com/StevanFreeborn/term-tier/internal/state"
+	tea "github.com/charmbracelet/bubbletea"
+)
+
+func TestNewTrackWindowSizeHandler(t *testing.T) {
+	h := handlers.NewTrackWindowSizeHandler()
+
+	if h == nil {
+		t.Error("Expected NewTrackWindowSizeHandler to return a handler, got nil")
+	}
+}
+
+func TestTrackWindowSizeHandler_Match(t *testing.T) {
+	h := handlers.NewTrackWindowSizeHandler()
+	s := state.New()
+
+	msg := tea.WindowSizeMsg{Width: 100, Height: 100}
+
+	if !h.Match(s, msg) {
+		t.Error("Expected Match to return true for WindowSizeMsg")
+	}
+}
+
+func TestTrackWindowSizeHandler_Handle(t *testing.T) {
+	h := handlers.NewTrackWindowSizeHandler()
+	s := state.New()
+
+	expectedWidth := 1024
+	expectedHeight := 768
+	msg := tea.WindowSizeMsg{Width: expectedWidth, Height: expectedHeight}
+
+	cmd := h.Handle(s, msg)
+
+	if s.WindowWidth() != expectedWidth {
+		t.Errorf("Expected WindowWidth to be %d, got %d", expectedWidth, s.WindowWidth())
+	}
+
+	if s.WindowHeight() != expectedHeight {
+		t.Errorf("Expected WindowHeight to be %d, got %d", expectedHeight, s.WindowHeight())
+	}
+
+	if cmd != nil {
+		t.Error("Expected Handle to return nil")
+	}
+}