standardize processor instance creation in tests

internal/processor/test/time-sleep_test.go

@@ -28,3 +28,36 @@ func TestTimeSleepFromRegistry(t *testing.T) {
 		t.Fatalf("time.sleep processor has wrong type: %s", processorInstance.Type())
 	}
 }
+
+func TestBadTimeSleep(t *testing.T) {
+	tests := []struct {
+		name        string
+		params      map[string]any
+		payload     any
+		errorString string
+	}{}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			registration, ok := processor.ProcessorRegistry["time.sleep"]
+			if !ok {
+				t.Fatalf("time.sleep processor not registered")
+			}
+
+			processorInstance, err := registration.New(config.ProcessorConfig{
+				Type:   "time.sleep",
+				Params: test.params,
+			})
+
+			got, err := processorInstance.Process(t.Context(), test.payload)
+
+			if err == nil {
+				t.Fatalf("time.sleep expected to fail but succeeded, got: %v", got)
+
+			}
+			if err.Error() != test.errorString {
+				t.Fatalf("time.sleep got error '%s', expected '%s'", err.Error(), test.errorString)
+			}
+		})
+	}
+}