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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package strings
import (
"strings";
"testing";
)
func eq(a, b []string) bool {
if len(a) != len(b) {
return false;
}
for i := 0; i < len(a); i++ {
if a[i] != b[i] {
return false;
}
}
return true;
}
var abcd = "abcd";
var faces = "☺☻☹";
var commas = "1,2,3,4";
var dots = "1....2....3....4";
type IndexTest struct {
s string;
sep string;
out int;
}
var indexTests = []IndexTest {
IndexTest{"", "", 0},
IndexTest{"", "a", -1},
IndexTest{"", "foo", -1},
IndexTest{"fo", "foo", -1},
IndexTest{"foo", "foo", 0},
IndexTest{"oofofoofooo", "f", 2},
IndexTest{"oofofoofooo", "foo", 4},
IndexTest{"barfoobarfoo", "foo", 3},
IndexTest{"foo", "", 0},
IndexTest{"foo", "o", 1},
IndexTest{"abcABCabc", "A", 3},
}
var lastIndexTests = []IndexTest {
IndexTest{"", "", 0},
IndexTest{"", "a", -1},
IndexTest{"", "foo", -1},
IndexTest{"fo", "foo", -1},
IndexTest{"foo", "foo", 0},
IndexTest{"oofofoofooo", "f", 7},
IndexTest{"oofofoofooo", "foo", 7},
IndexTest{"barfoobarfoo", "foo", 9},
IndexTest{"foo", "", 3},
IndexTest{"foo", "o", 2},
IndexTest{"abcABCabc", "A", 3},
IndexTest{"abcABCabc", "a", 6},
}
// Execute f on each test case. funcName should be the name of f; it's used
// in failure reports.
func runIndexTests(t *testing.T, f func(s, sep string) int, funcName string, testCases []IndexTest) {
for i,test := range testCases {
actual := f(test.s, test.sep);
if actual != test.out {
t.Errorf("%s(%q,%q) = %v; want %v", funcName, test.s, test.sep, actual, test.out);
}
}
}
func TestIndex(t *testing.T) {
runIndexTests(t, Index, "Index", indexTests);
}
func TestLastIndex(t *testing.T) {
runIndexTests(t, LastIndex, "LastIndex", lastIndexTests);
}
type ExplodeTest struct {
s string;
n int;
a []string;
}
var explodetests = []ExplodeTest {
ExplodeTest{ abcd, 4, []string{"a", "b", "c", "d"} },
ExplodeTest{ faces, 3, []string{"☺", "☻", "☹"} },
ExplodeTest{ abcd, 2, []string{"a", "bcd"} },
}
func TestExplode(t *testing.T) {
for _, tt := range explodetests {
a := explode(tt.s, tt.n);
if !eq(a, tt.a) {
t.Errorf("explode(%q, %d) = %v; want %v", tt.s, tt.n, a, tt.a);
continue;
}
s := Join(a, "");
if s != tt.s {
t.Errorf(`Join(explode(%q, %d), "") = %q`, tt.s, tt.n, s);
}
}
}
type SplitTest struct {
s string;
sep string;
n int;
a []string;
}
var splittests = []SplitTest {
SplitTest{ abcd, "a", 0, []string{"", "bcd"} },
SplitTest{ abcd, "z", 0, []string{"abcd"} },
SplitTest{ abcd, "", 0, []string{"a", "b", "c", "d"} },
SplitTest{ commas, ",", 0, []string{"1", "2", "3", "4"} },
SplitTest{ dots, "...", 0, []string{"1", ".2", ".3", ".4"} },
SplitTest{ faces, "☹", 0, []string{"☺☻", ""} },
SplitTest{ faces, "~", 0, []string{faces} },
SplitTest{ faces, "", 0, []string{"☺", "☻", "☹"} },
SplitTest{ "1 2 3 4", " ", 3, []string{"1", "2", "3 4"} },
SplitTest{ "1 2", " ", 3, []string{"1", "2"} },
SplitTest{ "123", "", 2, []string{"1", "23"} },
SplitTest{ "123", "", 17, []string{"1", "2", "3"} },
}
func TestSplit(t *testing.T) {
for _, tt := range splittests {
a := Split(tt.s, tt.sep, tt.n);
if !eq(a, tt.a) {
t.Errorf("Split(%q, %q, %d) = %v; want %v", tt.s, tt.sep, tt.n, a, tt.a);
continue;
}
s := Join(a, tt.sep);
if s != tt.s {
t.Errorf("Join(Split(%q, %q, %d), %q) = %q", tt.s, tt.sep, tt.n, tt.sep, s);
}
}
}
// Test case for any function which accepts and returns a single string.
type StringTest struct {
in, out string;
}
// Execute f on each test case. funcName should be the name of f; it's used
// in failure reports.
func runStringTests(t *testing.T, f func(string) string, funcName string, testCases []StringTest) {
for i, tc := range testCases {
actual := f(tc.in);
if actual != tc.out {
t.Errorf("%s(%q) = %q; want %q", funcName, tc.in, actual, tc.out);
}
}
}
var upperASCIITests = []StringTest {
StringTest{"", ""},
StringTest{"abc", "ABC"},
StringTest{"AbC123", "ABC123"},
StringTest{"azAZ09_", "AZAZ09_"}
}
var lowerASCIITests = []StringTest {
StringTest{"", ""},
StringTest{"abc", "abc"},
StringTest{"AbC123", "abc123"},
StringTest{"azAZ09_", "azaz09_"}
}
var trimSpaceASCIITests = []StringTest {
StringTest{"", ""},
StringTest{"abc", "abc"},
StringTest{" ", ""},
StringTest{" \t\r\n \t\t\r\r\n\n ", ""},
StringTest{" \t\r\n x\t\t\r\r\n\n ", "x"},
StringTest{" \t\r\n x\t\t\r\r\ny\n ", "x\t\t\r\r\ny"},
StringTest{"1 \t\r\n2", "1 \t\r\n2"},
}
func TestUpperASCII(t *testing.T) {
runStringTests(t, UpperASCII, "UpperASCII", upperASCIITests);
}
func TestLowerASCII(t *testing.T) {
runStringTests(t, LowerASCII, "LowerASCII", lowerASCIITests);
}
func TestTrimSpaceASCII(t *testing.T) {
runStringTests(t, TrimSpaceASCII, "TrimSpaceASCII", trimSpaceASCIITests);
}
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