/usr/share/go-1.8/test/string_lit.go is in golang-1.8-src 1.8.3-2ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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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.
// Test string literal syntax.
package main
import "os"
var ecode int
func assert(a, b, c string) {
if a != b {
ecode = 1
print("FAIL: ", c, ": ", a, "!=", b, "\n")
var max int = len(a)
if len(b) > max {
max = len(b)
}
for i := 0; i < max; i++ {
ac := 0
bc := 0
if i < len(a) {
ac = int(a[i])
}
if i < len(b) {
bc = int(b[i])
}
if ac != bc {
print("\ta[", i, "] = ", ac, "; b[", i, "] =", bc, "\n")
}
}
panic("string_lit")
}
}
const (
gx1 = "aä本☺"
gx2 = "aä\xFF\xFF本☺"
gx2fix = "aä\uFFFD\uFFFD本☺"
)
var (
gr1 = []rune(gx1)
gr2 = []rune(gx2)
gb1 = []byte(gx1)
gb2 = []byte(gx2)
)
func main() {
ecode = 0
s :=
"" +
" " +
"'`" +
"a" +
"ä" +
"本" +
"\a\b\f\n\r\t\v\\\"" +
"\000\123\x00\xca\xFE\u0123\ubabe\U0000babe" +
`` +
` ` +
`'"` +
`a` +
`ä` +
`本` +
`\a\b\f\n\r\t\v\\\'` +
`\000\123\x00\xca\xFE\u0123\ubabe\U0000babe` +
`\x\u\U\`
assert("", ``, "empty")
assert(" ", " ", "blank")
assert("\x61", "a", "lowercase a")
assert("\x61", `a`, "lowercase a (backquote)")
assert("\u00e4", "ä", "a umlaut")
assert("\u00e4", `ä`, "a umlaut (backquote)")
assert("\u672c", "本", "nihon")
assert("\u672c", `本`, "nihon (backquote)")
assert("\x07\x08\x0c\x0a\x0d\x09\x0b\x5c\x22",
"\a\b\f\n\r\t\v\\\"",
"backslashes")
assert("\\a\\b\\f\\n\\r\\t\\v\\\\\\\"",
`\a\b\f\n\r\t\v\\\"`,
"backslashes (backquote)")
assert("\x00\x53\000\xca\376S몾몾",
"\000\123\x00\312\xFE\u0053\ubabe\U0000babe",
"backslashes 2")
assert("\\000\\123\\x00\\312\\xFE\\u0123\\ubabe\\U0000babe",
`\000\123\x00\312\xFE\u0123\ubabe\U0000babe`,
"backslashes 2 (backquote)")
assert("\\x\\u\\U\\", `\x\u\U\`, "backslash 3 (backquote)")
// test large and surrogate-half runes. perhaps not the most logical place for these tests.
var r int32
r = 0x10ffff // largest rune value
s = string(r)
assert(s, "\xf4\x8f\xbf\xbf", "largest rune")
r = 0x10ffff + 1
s = string(r)
assert(s, "\xef\xbf\xbd", "too-large rune")
r = 0xD800
s = string(r)
assert(s, "\xef\xbf\xbd", "surrogate rune min")
r = 0xDFFF
s = string(r)
assert(s, "\xef\xbf\xbd", "surrogate rune max")
r = -1
s = string(r)
assert(s, "\xef\xbf\xbd", "negative rune")
// the large rune tests again, this time using constants instead of a variable.
// these conversions will be done at compile time.
s = string(0x10ffff) // largest rune value
assert(s, "\xf4\x8f\xbf\xbf", "largest rune constant")
s = string(0x10ffff + 1)
assert(s, "\xef\xbf\xbd", "too-large rune constant")
s = string(0xD800)
assert(s, "\xef\xbf\xbd", "surrogate rune min constant")
s = string(0xDFFF)
assert(s, "\xef\xbf\xbd", "surrogate rune max constant")
s = string(-1)
assert(s, "\xef\xbf\xbd", "negative rune")
// the large rune tests yet again, with a slice.
rs := []rune{0x10ffff, 0x10ffff + 1, 0xD800, 0xDFFF, -1}
s = string(rs)
assert(s, "\xf4\x8f\xbf\xbf\xef\xbf\xbd\xef\xbf\xbd\xef\xbf\xbd\xef\xbf\xbd", "large rune slice")
assert(string(gr1), gx1, "global ->[]rune")
assert(string(gr2), gx2fix, "global invalid ->[]rune")
assert(string(gb1), gx1, "->[]byte")
assert(string(gb2), gx2, "global invalid ->[]byte")
var (
r1 = []rune(gx1)
r2 = []rune(gx2)
b1 = []byte(gx1)
b2 = []byte(gx2)
)
assert(string(r1), gx1, "->[]rune")
assert(string(r2), gx2fix, "invalid ->[]rune")
assert(string(b1), gx1, "->[]byte")
assert(string(b2), gx2, "invalid ->[]byte")
os.Exit(ecode)
}
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