Add simple testing infrastructure

vendor/github.com/onsi/ginkgo/internal/leafnodes/runner.go

@@ -0,0 +1,113 @@
+package leafnodes
+
+import (
+	"fmt"
+	"github.com/onsi/ginkgo/internal/codelocation"
+	"github.com/onsi/ginkgo/internal/failer"
+	"github.com/onsi/ginkgo/types"
+	"reflect"
+	"time"
+)
+
+type runner struct {
+	isAsync          bool
+	asyncFunc        func(chan<- interface{})
+	syncFunc         func()
+	codeLocation     types.CodeLocation
+	timeoutThreshold time.Duration
+	nodeType         types.SpecComponentType
+	componentIndex   int
+	failer           *failer.Failer
+}
+
+func newRunner(body interface{}, codeLocation types.CodeLocation, timeout time.Duration, failer *failer.Failer, nodeType types.SpecComponentType, componentIndex int) *runner {
+	bodyType := reflect.TypeOf(body)
+	if bodyType.Kind() != reflect.Func {
+		panic(fmt.Sprintf("Expected a function but got something else at %v", codeLocation))
+	}
+
+	runner := &runner{
+		codeLocation:     codeLocation,
+		timeoutThreshold: timeout,
+		failer:           failer,
+		nodeType:         nodeType,
+		componentIndex:   componentIndex,
+	}
+
+	switch bodyType.NumIn() {
+	case 0:
+		runner.syncFunc = body.(func())
+		return runner
+	case 1:
+		if !(bodyType.In(0).Kind() == reflect.Chan && bodyType.In(0).Elem().Kind() == reflect.Interface) {
+			panic(fmt.Sprintf("Must pass a Done channel to function at %v", codeLocation))
+		}
+
+		wrappedBody := func(done chan<- interface{}) {
+			bodyValue := reflect.ValueOf(body)
+			bodyValue.Call([]reflect.Value{reflect.ValueOf(done)})
+		}
+
+		runner.isAsync = true
+		runner.asyncFunc = wrappedBody
+		return runner
+	}
+
+	panic(fmt.Sprintf("Too many arguments to function at %v", codeLocation))
+}
+
+func (r *runner) run() (outcome types.SpecState, failure types.SpecFailure) {
+	if r.isAsync {
+		return r.runAsync()
+	} else {
+		return r.runSync()
+	}
+}
+
+func (r *runner) runAsync() (outcome types.SpecState, failure types.SpecFailure) {
+	done := make(chan interface{}, 1)
+
+	go func() {
+                finished := false
+
+		defer func() {
+			if e := recover(); e != nil || !finished {
+				r.failer.Panic(codelocation.New(2), e)
+				select {
+				case <-done:
+					break
+				default:
+					close(done)
+				}
+			}
+		}()
+
+		r.asyncFunc(done)
+                finished = true
+	}()
+
+	select {
+	case <-done:
+	case <-time.After(r.timeoutThreshold):
+		r.failer.Timeout(r.codeLocation)
+	}
+
+	failure, outcome = r.failer.Drain(r.nodeType, r.componentIndex, r.codeLocation)
+	return
+}
+func (r *runner) runSync() (outcome types.SpecState, failure types.SpecFailure) {
+        finished := false
+
+	defer func() {
+		if e := recover(); e != nil || !finished {
+			r.failer.Panic(codelocation.New(2), e)
+		}
+
+		failure, outcome = r.failer.Drain(r.nodeType, r.componentIndex, r.codeLocation)
+	}()
+
+	r.syncFunc()
+        finished = true
+
+	return
+}