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frp/test/e2e/framework/ginkgowrapper/wrapper.go

81 lines
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// Package ginkgowrapper wraps Ginkgo Fail and Skip functions to panic
// with structured data instead of a constant string.
package ginkgowrapper
import (
"bufio"
"bytes"
"regexp"
"runtime"
"runtime/debug"
"strings"
"github.com/onsi/ginkgo"
)
// FailurePanic is the value that will be panicked from Fail.
type FailurePanic struct {
Message string // The failure message passed to Fail
Filename string // The filename that is the source of the failure
Line int // The line number of the filename that is the source of the failure
FullStackTrace string // A full stack trace starting at the source of the failure
}
// String makes FailurePanic look like the old Ginkgo panic when printed.
func (FailurePanic) String() string { return ginkgo.GINKGO_PANIC }
// Fail wraps ginkgo.Fail so that it panics with more useful
// information about the failure. This function will panic with a
// FailurePanic.
func Fail(message string, callerSkip ...int) {
skip := 1
if len(callerSkip) > 0 {
skip += callerSkip[0]
}
_, file, line, _ := runtime.Caller(skip)
fp := FailurePanic{
Message: message,
Filename: file,
Line: line,
FullStackTrace: pruneStack(skip),
}
defer func() {
e := recover()
if e != nil {
panic(fp)
}
}()
ginkgo.Fail(message, skip)
}
// ginkgo adds a lot of test running infrastructure to the stack, so
// we filter those out
var stackSkipPattern = regexp.MustCompile(`onsi/ginkgo`)
func pruneStack(skip int) string {
skip += 2 // one for pruneStack and one for debug.Stack
stack := debug.Stack()
scanner := bufio.NewScanner(bytes.NewBuffer(stack))
var prunedStack []string
// skip the top of the stack
for i := 0; i < 2*skip+1; i++ {
scanner.Scan()
}
for scanner.Scan() {
if stackSkipPattern.Match(scanner.Bytes()) {
scanner.Scan() // these come in pairs
} else {
prunedStack = append(prunedStack, scanner.Text())
scanner.Scan() // these come in pairs
prunedStack = append(prunedStack, scanner.Text())
}
}
return strings.Join(prunedStack, "\n")
}