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helpers.go
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/
helpers.go
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package assert
import (
"fmt"
"github.com/onsi/ginkgo"
"runtime"
"strings"
)
// Fail reports a failure through
func Fail(failureMessage string, msgAndArgs ...interface{}) bool {
message := messageFromMsgAndArgs(msgAndArgs...)
if len(message) > 0 {
ginkgo.Fail(fmt.Sprintf("\r%s\r\tLocation:\t%s\n\r\tError:\t\t%s\n\r\tMessages:\t%s\n\r", getWhitespaceString(), CallerInfo(), failureMessage, message))
} else {
ginkgo.Fail(fmt.Sprintf("\r%s\r\tLocation:\t%s\n\r\tError:\t\t%s\n\r", getWhitespaceString(), CallerInfo(), failureMessage))
}
return false
}
/* CallerInfo is necessary because the assert functions use the testing object
internally, causing it to print the file:line of the assert method, rather than where
the problem actually occured in calling code.*/
// CallerInfo returns a string containing the file and line number of the assert call
// that failed.
func CallerInfo() string {
file := ""
line := 0
ok := false
for i := 0; ; i++ {
_, file, line, ok = runtime.Caller(i)
if !ok {
return ""
}
parts := strings.Split(file, "/")
dir := parts[len(parts)-2]
file = parts[len(parts)-1]
if (dir != "assert" && dir != "mock") || file == "mock_test.go" {
break
}
}
return fmt.Sprintf("%s:%d", file, line)
}
// Takes a slice of errors and asserts that there were none provided
// When failing, appends error messages together on newlines and
// provides a count of how many errors were passed in
func AssertNoErrors(errs []error) {
if len(errs) > 0 {
var concatErrors string
for _, err := range errs {
concatErrors = concatErrors + err.Error() + "\n"
}
ginkgo.Fail(fmt.Sprintf("Expected no errors, but there were %d.\n%s", len(errs), concatErrors))
}
}
func AssertPanic(panicValue interface{}, callback func()) {
defer func() {
value := recover()
if value != panicValue {
panic(value)
}
}()
callback()
ginkgo.Fail("Expected a panic, but got none!")
}
// getWhitespaceString returns a string that is long enough to overwrite the default
// output from the go testing framework.
func getWhitespaceString() string {
_, file, line, ok := runtime.Caller(1)
if !ok {
return ""
}
parts := strings.Split(file, "/")
file = parts[len(parts)-1]
return strings.Repeat(" ", len(fmt.Sprintf("%s:%d: ", file, line)))
}
func messageFromMsgAndArgs(msgAndArgs ...interface{}) string {
if len(msgAndArgs) == 0 || msgAndArgs == nil {
return ""
}
if len(msgAndArgs) == 1 {
return msgAndArgs[0].(string)
}
if len(msgAndArgs) > 1 {
return fmt.Sprintf(msgAndArgs[0].(string), msgAndArgs[1:]...)
}
return ""
}