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helpers.go
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/
helpers.go
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// Copyright (C) MongoDB, Inc. 2017-present.
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
package testhelpers // import "go.mongodb.org/mongo-driver/internal/testutil/helpers"
import (
"fmt"
"io/ioutil"
"math"
"path"
"strings"
"time"
"testing"
"io"
"reflect"
"go.mongodb.org/mongo-driver/x/network/connstring"
"github.com/stretchr/testify/require"
)
// Test helpers
// IsNil returns true if the object is nil
func IsNil(object interface{}) bool {
if object == nil {
return true
}
value := reflect.ValueOf(object)
kind := value.Kind()
// checking to see if type is Chan, Func, Interface, Map, Ptr, or Slice
if kind >= reflect.Chan && kind <= reflect.Slice && value.IsNil() {
return true
}
return false
}
// RequireNotNil throws an error if var is nil
func RequireNotNil(t *testing.T, variable interface{}, msgFormat string, msgVars ...interface{}) {
if IsNil(variable) {
t.Fatalf(msgFormat, msgVars...)
}
}
// RequireNil throws an error if var is not nil
func RequireNil(t *testing.T, variable interface{}, msgFormat string, msgVars ...interface{}) {
t.Helper()
if !IsNil(variable) {
t.Fatalf(msgFormat, msgVars...)
}
}
// FindJSONFilesInDir finds the JSON files in a directory.
func FindJSONFilesInDir(t *testing.T, dir string) []string {
files := make([]string, 0)
entries, err := ioutil.ReadDir(dir)
require.NoError(t, err)
for _, entry := range entries {
if entry.IsDir() || path.Ext(entry.Name()) != ".json" {
continue
}
files = append(files, entry.Name())
}
return files
}
// RequireNoErrorOnClose ensures there is not an error when calling Close.
func RequireNoErrorOnClose(t *testing.T, c io.Closer) {
require.NoError(t, c.Close())
}
// VerifyConnStringOptions verifies the options on the connection string.
func VerifyConnStringOptions(t *testing.T, cs connstring.ConnString, options map[string]interface{}) {
// Check that all options are present.
for key, value := range options {
key = strings.ToLower(key)
switch key {
case "appname":
require.Equal(t, value, cs.AppName)
case "authsource":
require.Equal(t, value, cs.AuthSource)
case "authmechanism":
require.Equal(t, value, cs.AuthMechanism)
case "authmechanismproperties":
convertedMap := value.(map[string]interface{})
require.Equal(t,
mapInterfaceToString(convertedMap),
cs.AuthMechanismProperties)
case "connecttimeoutms":
require.Equal(t, value, float64(cs.ConnectTimeout/time.Millisecond))
case "heartbeatfrequencyms":
require.Equal(t, value, float64(cs.HeartbeatInterval/time.Millisecond))
case "journal":
require.True(t, cs.JSet)
require.Equal(t, value, cs.J)
case "maxidletimems":
require.Equal(t, value, cs.MaxConnIdleTime)
case "maxpoolsize":
require.True(t, cs.MaxPoolSizeSet)
require.Equal(t, value, cs.MaxPoolSize)
case "readpreference":
require.Equal(t, value, cs.ReadPreference)
case "readpreferencetags":
require.Equal(t, value, cs.ReadPreferenceTagSets)
case "replicaset":
require.Equal(t, value, cs.ReplicaSet)
case "serverselectiontimeoutms":
require.Equal(t, value, float64(cs.ServerSelectionTimeout/time.Millisecond))
case "ssl":
require.Equal(t, value, cs.SSL)
case "sockettimeoutms":
require.Equal(t, value, float64(cs.SocketTimeout/time.Millisecond))
case "w":
if cs.WNumberSet {
valueInt := GetIntFromInterface(value)
require.NotNil(t, valueInt)
require.Equal(t, *valueInt, int64(cs.WNumber))
} else {
require.Equal(t, value, cs.WString)
}
case "wtimeoutms":
require.Equal(t, value, float64(cs.WTimeout/time.Millisecond))
default:
opt, ok := cs.UnknownOptions[key]
require.True(t, ok)
require.Contains(t, opt, fmt.Sprint(value))
}
}
}
// Convert each interface{} value in the map to a string.
func mapInterfaceToString(m map[string]interface{}) map[string]string {
out := make(map[string]string)
for key, value := range m {
out[key] = fmt.Sprint(value)
}
return out
}
// GetIntFromInterface attempts to convert an empty interface value to an integer.
//
// Returns nil if it is not possible.
func GetIntFromInterface(i interface{}) *int64 {
var out int64
switch v := i.(type) {
case int:
out = int64(v)
case int32:
out = int64(v)
case int64:
out = v
case float32:
f := float64(v)
if math.Floor(f) != f || f > float64(math.MaxInt64) {
break
}
out = int64(f)
case float64:
if math.Floor(v) != v || v > float64(math.MaxInt64) {
break
}
out = int64(v)
default:
return nil
}
return &out
}