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f151c297eb
Start work on adding unit tests to our cli code in order to have to write less costly integration test. Signed-off-by: Vincent Demeester <vincent@sbr.pm>
117 lines
3.4 KiB
Go
117 lines
3.4 KiB
Go
// Package assert contains functions for making assertions in unit tests
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package assert
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import (
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"fmt"
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"path/filepath"
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"reflect"
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"runtime"
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"strings"
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"unicode"
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"github.com/davecgh/go-spew/spew"
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)
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// TestingT is an interface which defines the methods of testing.T that are
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// required by this package
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type TestingT interface {
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Fatalf(string, ...interface{})
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}
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// Equal compare the actual value to the expected value and fails the test if
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// they are not equal.
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func Equal(t TestingT, actual, expected interface{}) {
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if expected != actual {
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fatal(t, "Expected '%v' (%T) got '%v' (%T)", expected, expected, actual, actual)
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}
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}
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// EqualNormalizedString compare the actual value to the expected value after applying the specified
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// transform function. It fails the test if these two transformed string are not equal.
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// For example `EqualNormalizedString(t, RemoveSpace, "foo\n", "foo")` wouldn't fail the test as
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// spaces (and thus '\n') are removed before comparing the string.
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func EqualNormalizedString(t TestingT, transformFun func(rune) rune, actual, expected string) {
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if strings.Map(transformFun, actual) != strings.Map(transformFun, expected) {
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fatal(t, "Expected '%v' got '%v'", expected, expected, actual, actual)
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}
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}
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// RemoveSpace returns -1 if the specified runes is considered as a space (unicode)
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// and the rune itself otherwise.
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func RemoveSpace(r rune) rune {
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if unicode.IsSpace(r) {
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return -1
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}
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return r
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}
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//EqualStringSlice compares two slices and fails the test if they do not contain
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// the same items.
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func EqualStringSlice(t TestingT, actual, expected []string) {
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if len(actual) != len(expected) {
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fatal(t, "Expected (length %d): %q\nActual (length %d): %q",
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len(expected), expected, len(actual), actual)
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}
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for i, item := range actual {
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if item != expected[i] {
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fatal(t, "Slices differ at element %d, expected %q got %q",
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i, expected[i], item)
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}
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}
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}
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// NilError asserts that the error is nil, otherwise it fails the test.
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func NilError(t TestingT, err error) {
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if err != nil {
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fatal(t, "Expected no error, got: %s", err.Error())
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}
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}
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// DeepEqual compare the actual value to the expected value and fails the test if
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// they are not "deeply equal".
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func DeepEqual(t TestingT, actual, expected interface{}) {
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if !reflect.DeepEqual(actual, expected) {
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fatal(t, "Expected (%T):\n%v\n\ngot (%T):\n%s\n",
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expected, spew.Sdump(expected), actual, spew.Sdump(actual))
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}
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}
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// Error asserts that error is not nil, and contains the expected text,
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// otherwise it fails the test.
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func Error(t TestingT, err error, contains string) {
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if err == nil {
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fatal(t, "Expected an error, but error was nil")
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}
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if !strings.Contains(err.Error(), contains) {
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fatal(t, "Expected error to contain '%s', got '%s'", contains, err.Error())
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}
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}
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// Contains asserts that the string contains a substring, otherwise it fails the
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// test.
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func Contains(t TestingT, actual, contains string) {
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if !strings.Contains(actual, contains) {
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fatal(t, "Expected '%s' to contain '%s'", actual, contains)
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}
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}
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// NotNil fails the test if the object is nil
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func NotNil(t TestingT, obj interface{}) {
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if obj == nil {
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fatal(t, "Expected non-nil value.")
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}
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}
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func fatal(t TestingT, format string, args ...interface{}) {
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t.Fatalf(errorSource()+format, args...)
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}
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// See testing.decorate()
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func errorSource() string {
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_, filename, line, ok := runtime.Caller(3)
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if !ok {
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return ""
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}
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return fmt.Sprintf("%s:%d: ", filepath.Base(filename), line)
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}
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