micro/fsm/fsm_test.go

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package fsm
import (
"context"
"fmt"
"testing"
"go.unistack.org/micro/v4/logger"
)
func TestFSMStart(t *testing.T) {
ctx := context.TODO()
if err := logger.DefaultLogger.Init(); err != nil {
t.Fatal(err)
}
wrapper := func(next StateFunc) StateFunc {
return func(sctx context.Context, s State, opts ...StateOption) (State, error) {
sctx = logger.NewContext(sctx, logger.Fields("state", s.Name()))
return next(sctx, s, opts...)
}
}
f := NewFSM(InitialState("1"), WrapState(wrapper))
f1 := func(sctx context.Context, s State, opts ...StateOption) (State, error) {
_, ok := logger.FromContext(sctx)
if !ok {
t.Fatal("f1 context does not have logger")
}
args := s.Body().(map[string]interface{})
if v, ok := args["request"].(string); !ok || v == "" {
return nil, fmt.Errorf("empty request")
}
return &state{name: "", body: map[string]interface{}{"response": "state1"}}, nil
}
f2 := func(sctx context.Context, s State, opts ...StateOption) (State, error) {
_, ok := logger.FromContext(sctx)
if !ok {
t.Fatal("f2 context does not have logger")
}
args := s.Body().(map[string]interface{})
if v, ok := args["response"].(string); !ok || v == "" {
return nil, fmt.Errorf("empty response")
}
return &state{name: "", body: map[string]interface{}{"response": "state2"}}, nil
}
f3 := func(sctx context.Context, s State, opts ...StateOption) (State, error) {
_, ok := logger.FromContext(sctx)
if !ok {
t.Fatal("f3 context does not have logger")
}
args := s.Body().(map[string]interface{})
if v, ok := args["response"].(string); !ok || v == "" {
return nil, fmt.Errorf("empty response")
}
return &state{name: StateEnd, body: map[string]interface{}{"response": "state3"}}, nil
}
f.State("1", f1)
f.State("2", f2)
f.State("3", f3)
rsp, err := f.Start(ctx, map[string]interface{}{"request": "state"})
if err != nil {
t.Fatal(err)
}
args := rsp.(map[string]interface{})
if v, ok := args["response"].(string); !ok || v == "" {
t.Fatalf("nil rsp: %#+v", args)
} else if v != "state3" {
t.Fatalf("invalid rsp %#+v", args)
}
}