client_golang/prometheus/helpers_test.go

56 lines
1.2 KiB
Go

// Copyright (c) 2013, Prometheus Team
// All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package prometheus
import (
. "github.com/matttproud/gocheck"
"math"
"reflect"
)
type isNaNChecker struct {
*CheckerInfo
}
// This piece provides a simple tester for the gocheck testing library to
// ascertain if a value is not-a-number.
var IsNaN Checker = &isNaNChecker{
&CheckerInfo{Name: "IsNaN", Params: []string{"value"}},
}
func (checker *isNaNChecker) Check(params []interface{}, names []string) (result bool, error string) {
return isNaN(params[0]), ""
}
func isNaN(obtained interface{}) (result bool) {
if obtained == nil {
result = false
} else {
switch v := reflect.ValueOf(obtained); v.Kind() {
case reflect.Float64:
return math.IsNaN(obtained.(float64))
}
}
return false
}
type valueEqualsChecker struct {
*CheckerInfo
}
var ValueEquals Checker = &valueEqualsChecker{
&CheckerInfo{Name: "IsValue", Params: []string{"obtained", "expected"}},
}
func (checker *valueEqualsChecker) Check(params []interface{}, names []string) (result bool, error string) {
actual := params[0].(*item).Value
expected := params[1]
return actual == expected, ""
}