test(02-01): add failing tests for protocol types, registry, and label store

- TestRequestMarshal, TestResponseWithSessions
- TestRegistryUpdate, TestRegistryWaitingSince, TestRegistryRemoveStale
- TestLabelStoreSetGet, TestLabelStorePersistence, TestLabelStoreLoadMissing

protocol_test.go

@@ -0,0 +1,103 @@
+package main
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+)
+
+func TestRequestMarshal(t *testing.T) {
+	req := Request{Action: "list"}
+
+	data, err := json.Marshal(req)
+	if err != nil {
+		t.Fatalf("marshal: %v", err)
+	}
+
+	var got Request
+	if err := json.Unmarshal(data, &got); err != nil {
+		t.Fatalf("unmarshal: %v", err)
+	}
+
+	if got.Action != "list" {
+		t.Errorf("action = %q, want %q", got.Action, "list")
+	}
+}
+
+func TestRequestMarshalWithArgs(t *testing.T) {
+	args, _ := json.Marshal(LabelArgs{SessionID: "abc", Label: "review MR"})
+	req := Request{Action: "label", Args: args}
+
+	data, err := json.Marshal(req)
+	if err != nil {
+		t.Fatalf("marshal: %v", err)
+	}
+
+	var got Request
+	if err := json.Unmarshal(data, &got); err != nil {
+		t.Fatalf("unmarshal: %v", err)
+	}
+
+	if got.Action != "label" {
+		t.Errorf("action = %q, want %q", got.Action, "label")
+	}
+
+	var la LabelArgs
+	if err := json.Unmarshal(got.Args, &la); err != nil {
+		t.Fatalf("unmarshal args: %v", err)
+	}
+	if la.SessionID != "abc" || la.Label != "review MR" {
+		t.Errorf("args = %+v, want {abc, review MR}", la)
+	}
+}
+
+func TestResponseWithSessions(t *testing.T) {
+	now := time.Now()
+	resp := Response{
+		OK: true,
+		Sessions: []SessionInfo{
+			{
+				PID:          1234,
+				SessionID:    "sess-1",
+				Cwd:          "/home/user/project",
+				GitBranch:    "main",
+				State:        "Working",
+				Preview:      "Building...",
+				Workspace:    "3",
+				Label:        "feature-x",
+				WaitingSince: &now,
+			},
+		},
+	}
+
+	data, err := json.Marshal(resp)
+	if err != nil {
+		t.Fatalf("marshal: %v", err)
+	}
+
+	var got Response
+	if err := json.Unmarshal(data, &got); err != nil {
+		t.Fatalf("unmarshal: %v", err)
+	}
+
+	if !got.OK {
+		t.Error("ok = false, want true")
+	}
+	if len(got.Sessions) != 1 {
+		t.Fatalf("sessions len = %d, want 1", len(got.Sessions))
+	}
+
+	s := got.Sessions[0]
+	if s.PID != 1234 {
+		t.Errorf("pid = %d, want 1234", s.PID)
+	}
+	if s.Workspace != "3" {
+		t.Errorf("workspace = %q, want %q", s.Workspace, "3")
+	}
+	if s.Label != "feature-x" {
+		t.Errorf("label = %q, want %q", s.Label, "feature-x")
+	}
+	if s.WaitingSince == nil {
+		t.Error("waiting_since = nil, want non-nil")
+	}
+}