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moby--moby/pkg/testutil/assert/assert.go
Akihiro Suda 3a32b58792 Fix broken JSON support in cli/command/formatter
How to test:

    $ docker ps --format '{{json .}}'
    $ docker network ls --format '{{json .}}'
    $ docker volume ls --format '{{json .}}'

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
2016-10-17 08:07:17 +00:00

94 lines
2.5 KiB
Go

// Package assert contains functions for making assertions in unit tests
package assert
import (
"fmt"
"path/filepath"
"reflect"
"runtime"
"strings"
)
// 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{}) {
if expected != actual {
fatal(t, "Expected '%v' (%T) got '%v' (%T)", expected, expected, actual, actual)
}
}
//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 {
fatal(t, "Expected non-nil 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)
}