fix bot lifecycle and docs

tgapi/pool_test.go

@@ -0,0 +1,62 @@
+package tgapi
+
+import (
+	"context"
+	"errors"
+	"testing"
+)
+
+func TestWorkerPoolSubmitAfterStop(t *testing.T) {
+	pool := newWorkerPool(1, 1)
+	pool.start()
+	pool.stop()
+
+	if _, err := pool.submit(context.Background(), func(context.Context) (any, error) {
+		return nil, nil
+	}); !errors.Is(err, ErrPoolStopped) {
+		t.Fatalf("expected ErrPoolStopped, got %v", err)
+	}
+}
+
+func TestWorkerPoolQueueFull(t *testing.T) {
+	pool := newWorkerPool(1, 1)
+	pool.start()
+	defer pool.stop()
+
+	started := make(chan struct{})
+	release := make(chan struct{})
+
+	firstResult, err := pool.submit(context.Background(), func(context.Context) (any, error) {
+		close(started)
+		<-release
+		return "first", nil
+	})
+	if err != nil {
+		t.Fatalf("first submit returned error: %v", err)
+	}
+	<-started
+
+	secondResult, err := pool.submit(context.Background(), func(context.Context) (any, error) {
+		return "second", nil
+	})
+	if err != nil {
+		t.Fatalf("second submit returned error: %v", err)
+	}
+
+	if _, err := pool.submit(context.Background(), func(context.Context) (any, error) {
+		return "third", nil
+	}); !errors.Is(err, ErrPoolQueueFull) {
+		t.Fatalf("expected ErrPoolQueueFull, got %v", err)
+	}
+
+	close(release)
+
+	first := <-firstResult
+	if first.err != nil || first.value != "first" {
+		t.Fatalf("unexpected first result: %+v", first)
+	}
+	second := <-secondResult
+	if second.err != nil || second.value != "second" {
+		t.Fatalf("unexpected second result: %+v", second)
+	}
+}