118 lines
2.8 KiB
Go
118 lines
2.8 KiB
Go
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package leafnodes
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import (
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"fmt"
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"reflect"
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"time"
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"github.com/onsi/ginkgo/internal/codelocation"
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"github.com/onsi/ginkgo/internal/failer"
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"github.com/onsi/ginkgo/types"
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)
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type runner struct {
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isAsync bool
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asyncFunc func(chan<- interface{})
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syncFunc func()
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codeLocation types.CodeLocation
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timeoutThreshold time.Duration
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nodeType types.SpecComponentType
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componentIndex int
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failer *failer.Failer
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}
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func newRunner(body interface{}, codeLocation types.CodeLocation, timeout time.Duration, failer *failer.Failer, nodeType types.SpecComponentType, componentIndex int) *runner {
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bodyType := reflect.TypeOf(body)
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if bodyType.Kind() != reflect.Func {
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panic(fmt.Sprintf("Expected a function but got something else at %v", codeLocation))
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}
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runner := &runner{
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codeLocation: codeLocation,
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timeoutThreshold: timeout,
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failer: failer,
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nodeType: nodeType,
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componentIndex: componentIndex,
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}
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switch bodyType.NumIn() {
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case 0:
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runner.syncFunc = body.(func())
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return runner
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case 1:
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if !(bodyType.In(0).Kind() == reflect.Chan && bodyType.In(0).Elem().Kind() == reflect.Interface) {
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panic(fmt.Sprintf("Must pass a Done channel to function at %v", codeLocation))
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}
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wrappedBody := func(done chan<- interface{}) {
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bodyValue := reflect.ValueOf(body)
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bodyValue.Call([]reflect.Value{reflect.ValueOf(done)})
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}
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runner.isAsync = true
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runner.asyncFunc = wrappedBody
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return runner
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}
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panic(fmt.Sprintf("Too many arguments to function at %v", codeLocation))
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}
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func (r *runner) run() (outcome types.SpecState, failure types.SpecFailure) {
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if r.isAsync {
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return r.runAsync()
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} else {
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return r.runSync()
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}
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}
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func (r *runner) runAsync() (outcome types.SpecState, failure types.SpecFailure) {
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done := make(chan interface{}, 1)
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go func() {
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finished := false
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defer func() {
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if e := recover(); e != nil || !finished {
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r.failer.Panic(codelocation.New(2), e)
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select {
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case <-done:
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break
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default:
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close(done)
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}
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}
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}()
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r.asyncFunc(done)
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finished = true
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}()
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// If this goroutine gets no CPU time before the select block,
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// the <-done case may complete even if the test took longer than the timeoutThreshold.
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// This can cause flaky behaviour, but we haven't seen it in the wild.
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select {
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case <-done:
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case <-time.After(r.timeoutThreshold):
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r.failer.Timeout(r.codeLocation)
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}
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failure, outcome = r.failer.Drain(r.nodeType, r.componentIndex, r.codeLocation)
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return
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}
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func (r *runner) runSync() (outcome types.SpecState, failure types.SpecFailure) {
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finished := false
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defer func() {
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if e := recover(); e != nil || !finished {
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r.failer.Panic(codelocation.New(2), e)
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}
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failure, outcome = r.failer.Drain(r.nodeType, r.componentIndex, r.codeLocation)
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}()
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r.syncFunc()
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finished = true
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return
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}
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