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strings: add LastIndexAny

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The need for a LastIndexAny function has come up in the discussion
for https://golang.org/cl/3008041/. This function is
implemented analogously to lastIndexFunc, using functions from
the utf8 package.

R=r, rsc, PeterGo
CC=golang-dev
https://golang.org/cl/3057041
This commit is contained in:
Benny Siegert 2010-11-12 12:47:50 -08:00 • committed by Rob Pike
parent f0d174b776
commit 8530e8ef65
4 changed files with 79 additions and 9 deletions
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31
src/pkg/bytes/bytes_test.go
View file

@ -128,6 +128,20 @@ var indexAnyTests = []BinOpTest{
{dots + dots + dots, " ", -1},
}
var lastIndexAnyTests = []BinOpTest{
{"", "", -1},
{"", "a", -1},
{"", "abc", -1},
{"a", "", -1},
{"a", "a", 0},
{"aaa", "a", 2},
{"abc", "xyz", -1},
{"abc", "ab", 1},
{"a☺b☻c☹d", "uvw☻xyz", 2 + len("☺")},
{"a.RegExp*", ".(|)*+?^$[]", 8},
{dots + dots + dots, " ", -1},
}
var indexRuneTests = []BinOpTest{
{"", "a", -1},
{"", "☺", -1},
@ -150,18 +164,23 @@ func runIndexTests(t *testing.T, f func(s, sep []byte) int, funcName string, tes
}
}
func TestIndex(t *testing.T) { runIndexTests(t, Index, "Index", indexTests) }
func TestLastIndex(t *testing.T) { runIndexTests(t, LastIndex, "LastIndex", lastIndexTests) }
func TestIndexAny(t *testing.T) {
for _, test := range indexAnyTests {
func runIndexAnyTests(t *testing.T, f func(s []byte, chars string) int, funcName string, testCases []BinOpTest) {
for _, test := range testCases {
a := []byte(test.a)
actual := IndexAny(a, test.b)
actual := f(a, test.b)
if actual != test.i {
t.Errorf("IndexAny(%q,%q) = %v; want %v", a, test.b, actual, test.i)
t.Errorf("%s(%q,%q) = %v; want %v", funcName, a, test.b, actual, test.i)
}
}
}
func TestIndex(t *testing.T) { runIndexTests(t, Index, "Index", indexTests) }
func TestLastIndex(t *testing.T) { runIndexTests(t, LastIndex, "LastIndex", lastIndexTests) }
func TestIndexAny(t *testing.T) { runIndexAnyTests(t, IndexAny, "IndexAny", indexAnyTests) }
func TestLastIndexAny(t *testing.T) {
runIndexAnyTests(t, LastIndexAny, "LastIndexAny", lastIndexAnyTests)
}
func TestIndexByte(t *testing.T) {
for _, tt := range indexTests {
if len(tt.b) != 1 {