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package testingtsupport
import (
"regexp"
"runtime/debug"
"strings"
"github.com/onsi/gomega/types"
)
var StackTracePruneRE = regexp.MustCompile(`\/gomega\/|\/ginkgo\/|\/pkg\/testing\/|\/pkg\/runtime\/`)
type EmptyTWithHelper struct{}
func (e EmptyTWithHelper) Helper() {}
type gomegaTestingT interface {
Fatalf(format string, args ...interface{})
}
func BuildTestingTGomegaFailWrapper(t gomegaTestingT) *types.GomegaFailWrapper {
tWithHelper, hasHelper := t.(types.TWithHelper)
if !hasHelper {
tWithHelper = EmptyTWithHelper{}
}
fail := func(message string, callerSkip ...int) {
if hasHelper {
tWithHelper.Helper()
t.Fatalf("\n%s", message)
} else {
skip := 2
if len(callerSkip) > 0 {
skip += callerSkip[0]
}
stackTrace := pruneStack(string(debug.Stack()), skip)
t.Fatalf("\n%s\n%s\n", stackTrace, message)
}
}
return &types.GomegaFailWrapper{
Fail: fail,
TWithHelper: tWithHelper,
}
}
func pruneStack(fullStackTrace string, skip int) string {
stack := strings.Split(fullStackTrace, "\n")[1:]
if len(stack) > 2*skip {
stack = stack[2*skip:]
}
prunedStack := []string{}
for i := 0; i < len(stack)/2; i++ {
if !StackTracePruneRE.Match([]byte(stack[i*2])) {
prunedStack = append(prunedStack, stack[i*2])
prunedStack = append(prunedStack, stack[i*2+1])
}
}
return strings.Join(prunedStack, "\n")
}
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