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gen_fsm_test.go
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gen_fsm_test.go
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package go_gen_fsm
import (
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/stretchr/testify/mock"
"time"
)
var _ = Describe("GenFsm", func() {
const (
State1 = State("State1")
State2 = State("State2")
State3 = State("State3")
Event1 = Event("Event1")
Event2 = Event("Event2")
Event3 = Event("Event3")
)
var (
genFsm *GenFSM
testFsm *testFsmMock
)
Context("Start", func() {
BeforeEach(func() {
testFsm = &testFsmMock{}
testFsm.mock.On("Init", "arg1", "arg2").Return(State1)
})
It("Sets Initial state and Registers Handlers", func() {
genFsm = Start(testFsm, "arg1", "arg2")
Expect(genFsm.currentState).Should(Equal(State1))
Expect(len(genFsm.handlers)).Should(Equal(2))
Expect(len(genFsm.handlers[State1])).Should(Equal(2))
Expect(len(genFsm.handlers[State2])).Should(Equal(2))
Expect(genFsm.handlers[State1][0].event).Should(Equal(Event1))
Expect(genFsm.handlers[State1][1].event).Should(Equal(Event2))
Expect(genFsm.handlers[State2][0].event).Should(Equal(Event1))
Expect(genFsm.handlers[State2][1].event).Should(Equal(Event3))
genFsm.Stop()
})
})
Context("SendEvent", func() {
BeforeEach(func() {
testFsm = &testFsmMock{}
testFsm.mock.On("Init", "arg1", "arg2").Return(State1)
genFsm = Start(testFsm, "arg1", "arg2")
testFsm.mock.On("State1_Event1", 100, true, "SomeString").Return(State2)
testFsm.mock.On("State1_Event1", 100, true, "GoToState3").Return(State3)
})
AfterEach(func() {
genFsm.Stop()
})
Context("Success", func() {
It("Dispatches to right handler and updates state", func() {
genFsm.SendEvent(Event1, 100, true, "SomeString")
time.Sleep(100 * time.Microsecond)
Expect(genFsm.currentState).Should(Equal(State2))
})
It("Updates to a different state for different args", func() {
genFsm.SendEvent(Event1, 100, true, "GoToState3")
time.Sleep(100 * time.Microsecond)
Expect(genFsm.currentState).Should(Equal(State3))
})
})
Context("Fail", func() {
It("Incorrect no of args", func() {
genFsm.SendEvent(Event1, 100)
err := <-genFsm.errorChannel
Expect(err.Error()).Should(Equal("reflect: Call with too few input arguments"))
Expect(genFsm.currentState).Should(Equal(State1))
})
It("Invalid event", func() {
genFsm.SendEvent("Invalid Event", 100, true, "SomeString")
time.Sleep(100 * time.Microsecond)
Expect(genFsm.currentState).Should(Equal(State1))
})
It("Invalid state", func() {
genFsm.currentState = "Invalid State"
genFsm.SendEvent(Event1, 100, true, "SomeString")
time.Sleep(100 * time.Microsecond)
Expect(genFsm.currentState).Should(Equal(State("Invalid State")))
})
})
})
Context("SendSync", func() {
BeforeEach(func() {
testFsm = &testFsmMock{}
testFsm.mock.On("Init", "arg1", "arg2").Return(State1)
genFsm = Start(testFsm, "arg1", "arg2")
testFsm.mock.On("State1_Event1", 100, true, "SomeString").Return(State2)
testFsm.mock.On("State1_Event1", 100, true, "GoToState3").Return(State3)
})
It("Sends no op request and gets response", func() {
genFsm.SendEvent(Event1, 100, true, "SomeString")
resp := genFsm.SendSyncReq(NOOP)
Expect(genFsm.currentState).Should(Equal(State2))
Expect(resp).Should(Equal(NOOP))
genFsm.Stop()
})
It("Gets 404 if there is no handler registered for the request", func() {
genFsm.SendEvent(Event1, 100, true, "SomeString")
resp := genFsm.SendSyncReq("Invalid_Req")
Expect(genFsm.currentState).Should(Equal(State2))
Expect(resp).Should(Equal(404))
genFsm.Stop()
})
It("Shuts down gen fsm go routine ", func() {
genFsm.SendEvent(Event1, 100, true, "SomeString")
resp := genFsm.SendSyncReq(STOP)
Expect(genFsm.currentState).Should(Equal(State2))
Expect(genFsm.shutdown).Should(Equal(true))
Expect(resp).Should(Equal(STOP))
Expect(func() { genFsm.SendEvent(Event1) }).To(Panic())
})
})
Context("Start to finish", func() {
BeforeEach(func() {
testFsm = &testFsmMock{}
testFsm.mock.On("Init", "arg1", "arg2").Return(State1)
genFsm = Start(testFsm, "arg1", "arg2")
testFsm.mock.On("State1_Event1", 100, true, "SomeString").Return(State2)
testFsm.mock.On("State1_Event1", 100, true, "GoToState3").Return(State3)
testFsm.mock.On("State2_Event1", 101, false, "SomeString2").Return(State1)
testFsm.mock.On("State1_Event2", 102, false, "SomeString3").Return(State2)
testFsm.mock.On("State2_Event3", 999, true, "EndIt").Return(State("End"))
})
It("Init -> Dispatch Event -> Next State -> Dispatch Event..", func() {
genFsm.SendEvent(Event1, 100, true, "SomeString")
time.Sleep(100 * time.Microsecond)
Expect(genFsm.currentState).Should(Equal(State2))
genFsm.SendEvent(Event1, 101, false, "SomeString2")
time.Sleep(100 * time.Microsecond)
Expect(genFsm.currentState).Should(Equal(State1))
genFsm.SendEvent(Event2, 102, false, "SomeString3")
time.Sleep(100 * time.Microsecond)
Expect(genFsm.currentState).Should(Equal(State2))
genFsm.SendEvent(Event3, 999, true, "EndIt")
time.Sleep(100 * time.Microsecond)
Expect(genFsm.currentState).Should(Equal(State("End")))
})
AfterEach(func() {
genFsm.Stop()
})
})
})
type testFsmMock struct {
mock mock.Mock
}
// Generate this code later
type testFsm interface {
FSM
State1_Event1(arg1 int, arg2 bool, arg3 string) State
State1_Event2(arg1 int, arg2 bool, arg3 string) State
State2_Event1(arg1 int, arg2 bool, arg3 string) State
State2_Event3(arg1 int, arg2 bool, arg3 string) State
}
func (t *testFsmMock) Init(args ...interface{}) State {
a := t.mock.Called(args...)
return a.Get(0).(State)
}
func (t *testFsmMock) State1_Event1(arg1 int, arg2 bool, arg3 string) State {
args := t.mock.Called(arg1, arg2, arg3)
return args.Get(0).(State)
}
func (t *testFsmMock) State1_Event2(arg1 int, arg2 bool, arg3 string) State {
args := t.mock.Called(arg1, arg2, arg3)
return args.Get(0).(State)
}
func (t *testFsmMock) State2_Event1(arg1 int, arg2 bool, arg3 string) State {
args := t.mock.Called(arg1, arg2, arg3)
return args.Get(0).(State)
}
func (t *testFsmMock) State2_Event3(arg1 int, arg2 bool, arg3 string) State {
args := t.mock.Called(arg1, arg2, arg3)
return args.Get(0).(State)
}