feat(tui): add option to remember view state between sessions

internal/state/state_test.go

@@ -0,0 +1,236 @@
+package state
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"github.com/karol-broda/snitch/internal/collector"
+)
+
+func TestPath_XDGStateHome(t *testing.T) {
+	t.Setenv("XDG_STATE_HOME", "/custom/state")
+	path := Path()
+
+	expected := "/custom/state/snitch/tui.json"
+	if path != expected {
+		t.Errorf("Path() = %q, want %q", path, expected)
+	}
+}
+
+func TestPath_DefaultFallback(t *testing.T) {
+	t.Setenv("XDG_STATE_HOME", "")
+	path := Path()
+
+	home, err := os.UserHomeDir()
+	if err != nil {
+		t.Skip("cannot determine home directory")
+	}
+
+	expected := filepath.Join(home, ".local", "state", "snitch", "tui.json")
+	if path != expected {
+		t.Errorf("Path() = %q, want %q", path, expected)
+	}
+}
+
+func TestDefault(t *testing.T) {
+	d := Default()
+
+	if d.ShowTCP != true {
+		t.Error("expected ShowTCP to be true")
+	}
+	if d.ShowUDP != true {
+		t.Error("expected ShowUDP to be true")
+	}
+	if d.ShowListening != true {
+		t.Error("expected ShowListening to be true")
+	}
+	if d.ShowEstablished != true {
+		t.Error("expected ShowEstablished to be true")
+	}
+	if d.ShowOther != true {
+		t.Error("expected ShowOther to be true")
+	}
+	if d.SortField != collector.SortByLport {
+		t.Errorf("expected SortField to be %q, got %q", collector.SortByLport, d.SortField)
+	}
+	if d.SortReverse != false {
+		t.Error("expected SortReverse to be false")
+	}
+	if d.ResolveAddrs != false {
+		t.Error("expected ResolveAddrs to be false")
+	}
+	if d.ResolvePorts != false {
+		t.Error("expected ResolvePorts to be false")
+	}
+}
+
+func TestSaveAndLoad(t *testing.T) {
+	tmpDir := t.TempDir()
+	t.Setenv("XDG_STATE_HOME", tmpDir)
+
+	state := TUIState{
+		ShowTCP:         false,
+		ShowUDP:         true,
+		ShowListening:   true,
+		ShowEstablished: false,
+		ShowOther:       true,
+		SortField:       collector.SortByProcess,
+		SortReverse:     true,
+		ResolveAddrs:    true,
+		ResolvePorts:    false,
+	}
+
+	err := Save(state)
+	if err != nil {
+		t.Fatalf("Save() error = %v", err)
+	}
+
+	// verify file was created
+	path := Path()
+	if _, err := os.Stat(path); os.IsNotExist(err) {
+		t.Fatal("expected state file to exist after Save()")
+	}
+
+	loaded := Load()
+	if loaded == nil {
+		t.Fatal("Load() returned nil")
+	}
+
+	if loaded.ShowTCP != state.ShowTCP {
+		t.Errorf("ShowTCP = %v, want %v", loaded.ShowTCP, state.ShowTCP)
+	}
+	if loaded.ShowUDP != state.ShowUDP {
+		t.Errorf("ShowUDP = %v, want %v", loaded.ShowUDP, state.ShowUDP)
+	}
+	if loaded.ShowListening != state.ShowListening {
+		t.Errorf("ShowListening = %v, want %v", loaded.ShowListening, state.ShowListening)
+	}
+	if loaded.ShowEstablished != state.ShowEstablished {
+		t.Errorf("ShowEstablished = %v, want %v", loaded.ShowEstablished, state.ShowEstablished)
+	}
+	if loaded.ShowOther != state.ShowOther {
+		t.Errorf("ShowOther = %v, want %v", loaded.ShowOther, state.ShowOther)
+	}
+	if loaded.SortField != state.SortField {
+		t.Errorf("SortField = %v, want %v", loaded.SortField, state.SortField)
+	}
+	if loaded.SortReverse != state.SortReverse {
+		t.Errorf("SortReverse = %v, want %v", loaded.SortReverse, state.SortReverse)
+	}
+	if loaded.ResolveAddrs != state.ResolveAddrs {
+		t.Errorf("ResolveAddrs = %v, want %v", loaded.ResolveAddrs, state.ResolveAddrs)
+	}
+	if loaded.ResolvePorts != state.ResolvePorts {
+		t.Errorf("ResolvePorts = %v, want %v", loaded.ResolvePorts, state.ResolvePorts)
+	}
+}
+
+func TestLoad_NonExistent(t *testing.T) {
+	tmpDir := t.TempDir()
+	t.Setenv("XDG_STATE_HOME", tmpDir)
+
+	loaded := Load()
+	if loaded != nil {
+		t.Error("expected Load() to return nil for non-existent file")
+	}
+}
+
+func TestLoad_InvalidJSON(t *testing.T) {
+	tmpDir := t.TempDir()
+	t.Setenv("XDG_STATE_HOME", tmpDir)
+
+	// create directory and invalid json file
+	stateDir := filepath.Join(tmpDir, "snitch")
+	if err := os.MkdirAll(stateDir, 0755); err != nil {
+		t.Fatal(err)
+	}
+	stateFile := filepath.Join(stateDir, "tui.json")
+	if err := os.WriteFile(stateFile, []byte("not valid json"), 0644); err != nil {
+		t.Fatal(err)
+	}
+
+	loaded := Load()
+	if loaded != nil {
+		t.Error("expected Load() to return nil for invalid JSON")
+	}
+}
+
+func TestSave_CreatesDirectories(t *testing.T) {
+	tmpDir := t.TempDir()
+	t.Setenv("XDG_STATE_HOME", tmpDir)
+
+	// snitch directory should not exist yet
+	snitchDir := filepath.Join(tmpDir, "snitch")
+	if _, err := os.Stat(snitchDir); err == nil {
+		t.Fatal("expected snitch directory to not exist initially")
+	}
+
+	err := Save(Default())
+	if err != nil {
+		t.Fatalf("Save() error = %v", err)
+	}
+
+	// directory should now exist
+	if _, err := os.Stat(snitchDir); os.IsNotExist(err) {
+		t.Error("expected Save() to create parent directories")
+	}
+}
+
+func TestSaveAsync(t *testing.T) {
+	tmpDir := t.TempDir()
+	t.Setenv("XDG_STATE_HOME", tmpDir)
+
+	state := TUIState{
+		ShowTCP:   false,
+		SortField: collector.SortByPID,
+	}
+
+	SaveAsync(state)
+
+	// wait for background save with timeout
+	deadline := time.Now().Add(100 * time.Millisecond)
+	for time.Now().Before(deadline) {
+		if loaded := Load(); loaded != nil {
+			return
+		}
+		time.Sleep(5 * time.Millisecond)
+	}
+
+	t.Log("SaveAsync may not have completed in time (non-fatal in CI)")
+}
+
+func TestTUIState_JSONRoundtrip(t *testing.T) {
+	// verify all sort fields serialize correctly
+	sortFields := []collector.SortField{
+		collector.SortByLport,
+		collector.SortByProcess,
+		collector.SortByPID,
+		collector.SortByState,
+		collector.SortByProto,
+	}
+
+	tmpDir := t.TempDir()
+	t.Setenv("XDG_STATE_HOME", tmpDir)
+
+	for _, sf := range sortFields {
+		state := TUIState{
+			ShowTCP:   true,
+			SortField: sf,
+		}
+
+		if err := Save(state); err != nil {
+			t.Fatalf("Save() error for %q: %v", sf, err)
+		}
+
+		loaded := Load()
+		if loaded == nil {
+			t.Fatalf("Load() returned nil for %q", sf)
+		}
+
+		if loaded.SortField != sf {
+			t.Errorf("SortField roundtrip failed: got %q, want %q", loaded.SortField, sf)
+		}
+	}
+}