| 7 | ) |
| 8 | |
| 9 | func TestCircuitBreaker(t *testing.T) { |
| 10 | config := &Config{ |
| 11 | CircuitBreakerFailureThreshold: 5, |
| 12 | CircuitBreakerResetTimeout: 60 * time.Second, |
| 13 | CircuitBreakerMaxRequests: 3, |
| 14 | } |
| 15 | |
| 16 | t.Run("InitialState", func(t *testing.T) { |
| 17 | cb := newCircuitBreaker("test-endpoint:6379", config) |
| 18 | |
| 19 | if cb.IsOpen() { |
| 20 | t.Error("Circuit breaker should start in closed state") |
| 21 | } |
| 22 | |
| 23 | if cb.GetState() != CircuitBreakerClosed { |
| 24 | t.Errorf("Expected state %v, got %v", CircuitBreakerClosed, cb.GetState()) |
| 25 | } |
| 26 | }) |
| 27 | |
| 28 | t.Run("SuccessfulExecution", func(t *testing.T) { |
| 29 | cb := newCircuitBreaker("test-endpoint:6379", config) |
| 30 | |
| 31 | err := cb.Execute(func() error { |
| 32 | return nil // Success |
| 33 | }) |
| 34 | |
| 35 | if err != nil { |
| 36 | t.Errorf("Expected no error, got %v", err) |
| 37 | } |
| 38 | |
| 39 | if cb.GetState() != CircuitBreakerClosed { |
| 40 | t.Errorf("Expected state %v, got %v", CircuitBreakerClosed, cb.GetState()) |
| 41 | } |
| 42 | }) |
| 43 | |
| 44 | t.Run("FailureThreshold", func(t *testing.T) { |
| 45 | cb := newCircuitBreaker("test-endpoint:6379", config) |
| 46 | testError := errors.New("test error") |
| 47 | |
| 48 | // Fail 4 times (below threshold of 5) |
| 49 | for i := 0; i < 4; i++ { |
| 50 | err := cb.Execute(func() error { |
| 51 | return testError |
| 52 | }) |
| 53 | if err != testError { |
| 54 | t.Errorf("Expected test error, got %v", err) |
| 55 | } |
| 56 | if cb.GetState() != CircuitBreakerClosed { |
| 57 | t.Errorf("Circuit should still be closed after %d failures", i+1) |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | // 5th failure should open the circuit |
| 62 | err := cb.Execute(func() error { |
| 63 | return testError |
| 64 | }) |
| 65 | if err != testError { |
| 66 | t.Errorf("Expected test error, got %v", err) |