framework/fsm/hook_test.go

// Copyright (C) 2016 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package fsm_test

import (
	"testing"

	"android.googlesource.com/platform/tools/gpu/framework/assert"
	"android.googlesource.com/platform/tools/gpu/framework/fsm"
	"android.googlesource.com/platform/tools/gpu/framework/log"
)

func TestInvalidHook(t *testing.T) {
	ctx := assert.Context(t)
	_, err := fsm.Compile(fsm.FSM{
		States: []fsm.State{
			{Name: "A"},
		},
		Hooks: []fsm.Hook{
			{From: "B"},
		},
	})
	assert.With(ctx).ThatError(err).HasMessage("Hook from B to <nil> on <nil> matched no transitions")
}

type hookMethodTester struct {
	from  fsm.StateID
	event fsm.StateID
	to    fsm.StateID
}

func (m *hookMethodTester) Hook(ctx log.Context, fsm *fsm.Instance, from fsm.StateID, event fsm.Event) {
	m.from = from
	m.event = event
	m.to = fsm.State()
}
func (m *hookMethodTester) Bad() {}

func TestMethodHook(t *testing.T) {
	ctx := assert.Context(t)
	m := &hookMethodTester{}
	err := fsm.RunWith(ctx, m, fsm.MustCompile(fsm.FSM{
		States: []fsm.State{
			fsm.Do("A", nil),
			fsm.Exit("Done"),
		},
		Transitions: []fsm.Transition{
			{From: "A", To: "Done"},
		},
		Hooks: []fsm.Hook{
			fsm.OnMethod(nil, nil, nil, "Hook"),
		},
	}))
	assert.With(ctx).ThatError(err).Succeeded()
	assert.For(ctx, "from").ThatString(m.from).Equals("A")
	assert.For(ctx, "event").That(m.event).Equals(fsm.Next)
	assert.For(ctx, "to").ThatString(m.to).Equals("Done")
}

func TestInvalidHookMethodName(t *testing.T) {
	ctx := assert.Context(t)
	m := &hookMethodTester{}
	err := fsm.RunWith(ctx, m, fsm.MustCompile(fsm.FSM{
		States: []fsm.State{
			fsm.Do("A", nil),
			fsm.Exit("Done"),
		},
		Transitions: []fsm.Transition{
			{From: "A", To: "Done"},
		},
		Hooks: []fsm.Hook{
			fsm.OnMethod(nil, nil, nil, "MissingHook"),
		},
	}))
	assert.With(ctx).ThatError(err).HasMessage("Error:No such method")
}

func TestInvalidHookMethodSignature(t *testing.T) {
	ctx := assert.Context(t)
	m := &hookMethodTester{}
	err := fsm.RunWith(ctx, m, fsm.MustCompile(fsm.FSM{
		States: []fsm.State{
			fsm.Do("A", nil),
			fsm.Exit("Done"),
		},
		Transitions: []fsm.Transition{
			{From: "A", To: "Done"},
		},
		Hooks: []fsm.Hook{
			fsm.OnMethod(nil, nil, nil, "Bad"),
		},
	}))
	assert.With(ctx).ThatError(err).HasMessage("Error:Invalid signature")
}