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assert.go
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assert.go
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// Package assert contains functions for making assertions in unit tests
// From github.com/docker/docker/pkg/testutil/assert
package assert
import (
"fmt"
"path/filepath"
"reflect"
"runtime"
"strings"
"bytes"
"time"
)
// TestingT is an interface which defines the methods of testing.T that are
// required by this package
type TestingT interface {
Fatalf(string, ...interface{})
}
// Equal compare the actual value to the expected value and fails the test if
// they are not equal.
func Equal(t TestingT, actual, expected interface{}, msg string) {
if expected != actual {
fatal(t, "Expected '%v' (%T) got '%v' (%T). msg:%s", expected, expected, actual, actual, msg)
}
}
// NotEqual compare the actual value to the expected value and fails the test if
// they are equal.
func NotEqual(t TestingT, actual, expected interface{}, msg string) {
if expected == actual {
fatal(t, "Not Expected '%v' (%T) got '%v' (%T). msg:%v", expected, expected, actual, actual, msg)
}
}
//EqualStringSlice compares two slices and fails the test if they do not contain
// the same items.
func EqualStringSlice(t TestingT, actual, expected []string) {
if len(actual) != len(expected) {
fatal(t, "Expected (length %d): %q\nActual (length %d): %q",
len(expected), expected, len(actual), actual)
}
for i, item := range actual {
if item != expected[i] {
fatal(t, "Slices differ at element %d, expected %q got %q",
i, expected[i], item)
}
}
}
// NilError asserts that the error is nil, otherwise it fails the test.
func NilError(t TestingT, err error) {
if err != nil {
fatal(t, "Expected no error, got: %s", err.Error())
}
}
// DeepEqual compare the actual value to the expected value and fails the test if
// they are not "deeply equal".
func DeepEqual(t TestingT, actual, expected interface{}) {
if !reflect.DeepEqual(actual, expected) {
fatal(t, "Expected '%v' (%T) got '%v' (%T)", expected, expected, actual, actual)
}
}
// Error asserts that error is not nil, and contains the expected text,
// otherwise it fails the test.
func Error(t TestingT, err error, contains string) {
if err == nil {
fatal(t, "Expected an error, but error was nil")
}
if !strings.Contains(err.Error(), contains) {
fatal(t, "Expected error to contain '%s', got '%s'", contains, err.Error())
}
}
// Contains asserts that the string contains a substring, otherwise it fails the
// test.
func Contains(t TestingT, actual, contains string) {
if !strings.Contains(actual, contains) {
fatal(t, "Expected '%s' to contain '%s'", actual, contains)
}
}
// NotNil fails the test if the object is nil
func NotNil(t TestingT, obj interface{}) {
if obj == nil || reflect.ValueOf(obj).IsNil() {
fatal(t, "Expected non-nil value. %t", obj)
}
}
// Nil fails the test if the object is not nil
func Nil(t TestingT, obj interface{}) {
if obj != nil {
if !reflect.ValueOf(obj).IsNil() {
fatal(t, "Expected nil value.")
}
}
}
// True fails the test if the object is false
func True(t TestingT, obj bool) {
if obj == false {
fatal(t, "Expected true value.")
}
}
// False fails the test if the object is true
func False(t TestingT, obj bool) {
if obj == true {
fatal(t, "Expected false value.")
}
}
func Less(t TestingT, x, y interface{}) {
v1Type := reflect.TypeOf(x)
v2Type := reflect.TypeOf(y)
if v1Type.Kind() != v2Type.Kind() {
fatal(t, "Needs two same type, but %s != %s", v1Type.Kind(), v2Type.Kind())
}
l, err := less(x, y)
if err != nil {
fatal(t, "less failed, err %v", err)
}
if !l {
fatal(t, "Expected less than expected value.")
}
}
func fatal(t TestingT, format string, args ...interface{}) {
t.Fatalf(errorSource()+format, args...)
}
// See testing.decorate()
func errorSource() string {
_, filename, line, ok := runtime.Caller(3)
if !ok {
return ""
}
return fmt.Sprintf("%s:%d: ", filepath.Base(filename), line)
}
type T struct {}
func (t *T)Fatalf(format string, a ...interface{}) {
panic(fmt.Sprintf(format, a...))
}
var testingT *T = &T{}
func Must(b bool) {
if b {
return
}
fatal(testingT, "assertion failed")
}
func MustNoError(err error) {
if err == nil {
return
}
fatal(testingT, "error happens, assertion failed %v", err)
}
// v1 and v2 must have the same type
// return >0 if v1 > v2
// return 0 if v1 = v2
// return <0 if v1 < v2
// now we only support int, uint, float64, string and []byte comparison
func compare(v1 interface{}, v2 interface{}) (int, error) {
value1 := reflect.ValueOf(v1)
value2 := reflect.ValueOf(v2)
switch v1.(type) {
case int, int8, int16, int32, int64:
a1 := value1.Int()
a2 := value2.Int()
if a1 > a2 {
return 1, nil
} else if a1 == a2 {
return 0, nil
}
return -1, nil
case uint, uint8, uint16, uint32, uint64:
a1 := value1.Uint()
a2 := value2.Uint()
if a1 > a2 {
return 1, nil
} else if a1 == a2 {
return 0, nil
}
return -1, nil
case float32, float64:
a1 := value1.Float()
a2 := value2.Float()
if a1 > a2 {
return 1, nil
} else if a1 == a2 {
return 0, nil
}
return -1, nil
case string:
a1 := value1.String()
a2 := value2.String()
if a1 > a2 {
return 1, nil
} else if a1 == a2 {
return 0, nil
}
return -1, nil
case []byte:
a1 := value1.Bytes()
a2 := value2.Bytes()
return bytes.Compare(a1, a2), nil
case time.Time:
a1 := v1.(time.Time)
a2 := v2.(time.Time)
if a1.After(a2) {
return 1, nil
} else if a1.Equal(a2) {
return 0, nil
}
return -1, nil
case time.Duration:
a1 := v1.(time.Duration)
a2 := v2.(time.Duration)
if a1 > a2 {
return 1, nil
} else if a1 == a2 {
return 0, nil
}
return -1, nil
default:
return 0, fmt.Errorf("type %T is not supported now", v1)
}
}
func less(v1 interface{}, v2 interface{}) (bool, error) {
n, err := compare(v1, v2)
if err != nil {
return false, err
}
return n < 0, nil
}
func lessEqual(v1 interface{}, v2 interface{}) (bool, error) {
n, err := compare(v1, v2)
if err != nil {
return false, err
}
return n <= 0, nil
}
func greater(v1 interface{}, v2 interface{}) (bool, error) {
n, err := compare(v1, v2)
if err != nil {
return false, err
}
return n > 0, nil
}
func greaterEqual(v1 interface{}, v2 interface{}) (bool, error) {
n, err := compare(v1, v2)
if err != nil {
return false, err
}
return n >= 0, nil
}