chore: import upstream snapshot with attribution

internal/event/source/source_test.go

@@ -0,0 +1,61 @@
+// Copyright (c) 2026 Lark Technologies Pte. Ltd.
+// SPDX-License-Identifier: MIT
+
+package source
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/larksuite/cli/internal/event"
+)
+
+type mockSource struct {
+	name   string
+	events []*event.RawEvent
+}
+
+func (s *mockSource) Name() string { return s.name }
+func (s *mockSource) Start(ctx context.Context, _ []string, emit func(*event.RawEvent), _ StatusNotifier) error {
+	for _, e := range s.events {
+		emit(e)
+	}
+	<-ctx.Done()
+	return nil
+}
+
+func TestRegister(t *testing.T) {
+	ResetForTest()
+
+	src := &mockSource{name: "test-source"}
+	Register(src)
+
+	sources := All()
+	if len(sources) != 1 || sources[0].Name() != "test-source" {
+		t.Errorf("unexpected sources: %v", sources)
+	}
+}
+
+func TestMockSource_EmitsEvents(t *testing.T) {
+	src := &mockSource{
+		name: "test",
+		events: []*event.RawEvent{
+			{EventID: "1", EventType: "im.message.receive_v1"},
+			{EventID: "2", EventType: "im.message.receive_v1"},
+		},
+	}
+
+	received := make(chan *event.RawEvent, 10)
+	ctx, cancel := context.WithTimeout(context.Background(), 100*time.Millisecond)
+	defer cancel()
+
+	go src.Start(ctx, nil, func(e *event.RawEvent) {
+		received <- e
+	}, nil)
+
+	time.Sleep(50 * time.Millisecond)
+	if len(received) != 2 {
+		t.Errorf("expected 2 events, got %d", len(received))
+	}
+}