-
Notifications
You must be signed in to change notification settings - Fork 3
/
reporter.go
40 lines (35 loc) · 1.07 KB
/
reporter.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
// Package assert private utility functions for error reporting
package assert
import (
"fmt"
"reflect"
"runtime"
)
type testingT interface {
Errorf(format string, args ...interface{})
}
func reportError(reporterIface interface{}, msg fmt.Stringer) {
source := ""
_, file, line, ok := runtime.Caller(2)
if ok {
source = fmt.Sprintf("\n\t line: %s:%d", file, line)
}
reporterFrom(reporterIface)("%s %s", msg, source)
}
func reporterFrom(reporterIface interface{}) func(format string, args ...interface{}) {
kind := reflect.ValueOf(reporterIface).Kind()
switch kind {
case reflect.Func:
if reporter, ok := reporterIface.(func(format string, args ...interface{})); ok {
return reporter
}
panic("provided reporter function doesn't implement `func(format string, args ...interface{})`")
case reflect.Interface, reflect.Ptr:
if reporter, ok := reporterIface.(testingT); ok {
return reporter.Errorf
}
panic("provided interface doesn't implement `Fatalf(format string, args ...interface{})`")
default:
panic(fmt.Sprintf("don't know how to handle %s", kind))
}
}