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747 |
jeremybenn |
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package template
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import (
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"bytes"
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"math"
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"strings"
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"testing"
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)
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func TestNextJsCtx(t *testing.T) {
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tests := []struct {
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jsCtx jsCtx
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s string
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}{
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// Statement terminators precede regexps.
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{jsCtxRegexp, ";"},
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// This is not airtight.
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// ({ valueOf: function () { return 1 } } / 2)
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// is valid JavaScript but in practice, devs do not do this.
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// A block followed by a statement starting with a RegExp is
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// much more common:
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// while (x) {...} /foo/.test(x) || panic()
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{jsCtxRegexp, "}"},
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// But member, call, grouping, and array expression terminators
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// precede div ops.
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{jsCtxDivOp, ")"},
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{jsCtxDivOp, "]"},
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// At the start of a primary expression, array, or expression
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// statement, expect a regexp.
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{jsCtxRegexp, "("},
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{jsCtxRegexp, "["},
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{jsCtxRegexp, "{"},
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// Assignment operators precede regexps as do all exclusively
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// prefix and binary operators.
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{jsCtxRegexp, "="},
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{jsCtxRegexp, "+="},
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{jsCtxRegexp, "*="},
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{jsCtxRegexp, "*"},
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{jsCtxRegexp, "!"},
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// Whether the + or - is infix or prefix, it cannot precede a
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// div op.
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{jsCtxRegexp, "+"},
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{jsCtxRegexp, "-"},
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// An incr/decr op precedes a div operator.
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// This is not airtight. In (g = ++/h/i) a regexp follows a
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// pre-increment operator, but in practice devs do not try to
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// increment or decrement regular expressions.
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// (g++/h/i) where ++ is a postfix operator on g is much more
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// common.
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{jsCtxDivOp, "--"},
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{jsCtxDivOp, "++"},
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{jsCtxDivOp, "x--"},
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// When we have many dashes or pluses, then they are grouped
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// left to right.
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{jsCtxRegexp, "x---"}, // A postfix -- then a -.
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// return followed by a slash returns the regexp literal or the
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// slash starts a regexp literal in an expression statement that
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// is dead code.
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{jsCtxRegexp, "return"},
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{jsCtxRegexp, "return "},
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{jsCtxRegexp, "return\t"},
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{jsCtxRegexp, "return\n"},
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{jsCtxRegexp, "return\u2028"},
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// Identifiers can be divided and cannot validly be preceded by
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// a regular expressions. Semicolon insertion cannot happen
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// between an identifier and a regular expression on a new line
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// because the one token lookahead for semicolon insertion has
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// to conclude that it could be a div binary op and treat it as
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// such.
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{jsCtxDivOp, "x"},
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{jsCtxDivOp, "x "},
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{jsCtxDivOp, "x\t"},
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{jsCtxDivOp, "x\n"},
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{jsCtxDivOp, "x\u2028"},
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{jsCtxDivOp, "preturn"},
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// Numbers precede div ops.
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{jsCtxDivOp, "0"},
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// Dots that are part of a number are div preceders.
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{jsCtxDivOp, "0."},
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}
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for _, test := range tests {
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if nextJSCtx([]byte(test.s), jsCtxRegexp) != test.jsCtx {
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t.Errorf("want %s got %q", test.jsCtx, test.s)
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}
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if nextJSCtx([]byte(test.s), jsCtxDivOp) != test.jsCtx {
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t.Errorf("want %s got %q", test.jsCtx, test.s)
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}
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}
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if nextJSCtx([]byte(" "), jsCtxRegexp) != jsCtxRegexp {
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t.Error("Blank tokens")
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}
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if nextJSCtx([]byte(" "), jsCtxDivOp) != jsCtxDivOp {
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t.Error("Blank tokens")
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}
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}
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func TestJSValEscaper(t *testing.T) {
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tests := []struct {
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x interface{}
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js string
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}{
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{int(42), " 42 "},
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{uint(42), " 42 "},
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{int16(42), " 42 "},
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{uint16(42), " 42 "},
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{int32(-42), " -42 "},
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{uint32(42), " 42 "},
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{int16(-42), " -42 "},
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{uint16(42), " 42 "},
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{int64(-42), " -42 "},
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{uint64(42), " 42 "},
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{uint64(1) << 53, " 9007199254740992 "},
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// ulp(1 << 53) > 1 so this loses precision in JS
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// but it is still a representable integer literal.
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{uint64(1)<<53 + 1, " 9007199254740993 "},
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{float32(1.0), " 1 "},
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{float32(-1.0), " -1 "},
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{float32(0.5), " 0.5 "},
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{float32(-0.5), " -0.5 "},
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{float32(1.0) / float32(256), " 0.00390625 "},
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{float32(0), " 0 "},
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{math.Copysign(0, -1), " -0 "},
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{float64(1.0), " 1 "},
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{float64(-1.0), " -1 "},
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{float64(0.5), " 0.5 "},
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{float64(-0.5), " -0.5 "},
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{float64(0), " 0 "},
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{math.Copysign(0, -1), " -0 "},
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{"", `""`},
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{"foo", `"foo"`},
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// Newlines.
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{"\r\n\u2028\u2029", `"\r\n\u2028\u2029"`},
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// "\v" == "v" on IE 6 so use "\x0b" instead.
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{"\t\x0b", `"\u0009\u000b"`},
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{struct{ X, Y int }{1, 2}, `{"X":1,"Y":2}`},
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{[]interface{}{}, "[]"},
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{[]interface{}{42, "foo", nil}, `[42,"foo",null]`},
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{[]string{""}, `["\u003c!--","\u003c/script\u003e","--\u003e"]`},
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{"", `"--\u003e"`},
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{"
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{"]]>", `"]]\u003e"`},
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{"
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{"\U0001D11E", "\"\U0001D11E\""}, // or "\uD834\uDD1E"
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}
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for _, test := range tests {
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if js := jsValEscaper(test.x); js != test.js {
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t.Errorf("%+v: want\n\t%q\ngot\n\t%q", test.x, test.js, js)
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}
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// Make sure that escaping corner cases are not broken
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// by nesting.
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a := []interface{}{test.x}
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want := "[" + strings.TrimSpace(test.js) + "]"
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if js := jsValEscaper(a); js != want {
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t.Errorf("%+v: want\n\t%q\ngot\n\t%q", a, want, js)
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}
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}
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}
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func TestJSStrEscaper(t *testing.T) {
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tests := []struct {
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x interface{}
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esc string
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}{
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{"", ``},
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{"foo", `foo`},
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{"\u0000", `\0`},
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{"\t", `\t`},
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{"\n", `\n`},
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{"\r", `\r`},
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{"\u2028", `\u2028`},
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{"\u2029", `\u2029`},
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{"\\", `\\`},
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{"\\n", `\\n`},
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{"foo\r\nbar", `foo\r\nbar`},
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// Preserve attribute boundaries.
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{`"`, `\x22`},
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{`'`, `\x27`},
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// Allow embedding in HTML without further escaping.
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{`&`, `\x26amp;`},
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// Prevent breaking out of text node and element boundaries.
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{"", `\x3c\/script\x3e`},
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{"
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{"]]>", `]]\x3e`},
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// http://dev.w3.org/html5/markup/aria/syntax.html#escaping-text-span
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// "The text in style, script, title, and textarea elements
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// must not have an escaping text span start that is not
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// followed by an escaping text span end."
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// Furthermore, spoofing an escaping text span end could lead
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// to different interpretation of a sequence otherwise
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// masked by the escaping text span, and spoofing a start could
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// allow regular text content to be interpreted as script
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// allowing script execution via a combination of a JS string
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// injection followed by an HTML text injection.
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{"", `--\x3e`},
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// From http://code.google.com/p/doctype/wiki/ArticleUtf7
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{"+ADw-script+AD4-alert(1)+ADw-/script+AD4-",
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`\x2bADw-script\x2bAD4-alert(1)\x2bADw-\/script\x2bAD4-`,
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},
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// Invalid UTF-8 sequence
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{"foo\xA0bar", "foo\xA0bar"},
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// Invalid unicode scalar value.
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{"foo\xed\xa0\x80bar", "foo\xed\xa0\x80bar"},
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}
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for _, test := range tests {
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esc := jsStrEscaper(test.x)
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if esc != test.esc {
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t.Errorf("%q: want %q got %q", test.x, test.esc, esc)
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}
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}
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}
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func TestJSRegexpEscaper(t *testing.T) {
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tests := []struct {
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x interface{}
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esc string
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}{
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{"", `(?:)`},
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{"foo", `foo`},
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{"\u0000", `\0`},
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{"\t", `\t`},
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{"\n", `\n`},
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{"\r", `\r`},
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{"\u2028", `\u2028`},
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{"\u2029", `\u2029`},
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{"\\", `\\`},
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{"\\n", `\\n`},
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{"foo\r\nbar", `foo\r\nbar`},
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// Preserve attribute boundaries.
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{`"`, `\x22`},
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{`'`, `\x27`},
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// Allow embedding in HTML without further escaping.
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{`&`, `\x26amp;`},
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// Prevent breaking out of text node and element boundaries.
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{"", `\x3c\/script\x3e`},
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{"
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{"]]>", `\]\]\x3e`},
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// Escaping text spans.
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{"", `\-\-\x3e`},
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{"*", `\*`},
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{"+", `\x2b`},
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{"?", `\?`},
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{"[](){}", `\[\]\(\)\{\}`},
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{"$foo|x.y", `\$foo\|x\.y`},
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{"x^y", `x\^y`},
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}
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for _, test := range tests {
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esc := jsRegexpEscaper(test.x)
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if esc != test.esc {
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t.Errorf("%q: want %q got %q", test.x, test.esc, esc)
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}
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}
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}
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func TestEscapersOnLower7AndSelectHighCodepoints(t *testing.T) {
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input := ("\x00\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f" +
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"\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
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` !"#$%&'()*+,-./` +
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`0123456789:;<=>?` +
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`@ABCDEFGHIJKLMNO` +
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`PQRSTUVWXYZ[\]^_` +
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"`abcdefghijklmno" +
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"pqrstuvwxyz{|}~\x7f" +
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"\u00A0\u0100\u2028\u2029\ufeff\U0001D11E")
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tests := []struct {
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name string
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escaper func(...interface{}) string
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escaped string
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}{
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{
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"jsStrEscaper",
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jsStrEscaper,
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"\\0\x01\x02\x03\x04\x05\x06\x07" +
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"\x08\\t\\n\\x0b\\f\\r\x0E\x0F" +
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"\x10\x11\x12\x13\x14\x15\x16\x17" +
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"\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
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` !\x22#$%\x26\x27()*\x2b,-.\/` +
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`0123456789:;\x3c=\x3e?` +
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`@ABCDEFGHIJKLMNO` +
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`PQRSTUVWXYZ[\\]^_` +
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"`abcdefghijklmno" +
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"pqrstuvwxyz{|}~\x7f" +
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"\u00A0\u0100\\u2028\\u2029\ufeff\U0001D11E",
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},
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{
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"jsRegexpEscaper",
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jsRegexpEscaper,
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"\\0\x01\x02\x03\x04\x05\x06\x07" +
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"\x08\\t\\n\\x0b\\f\\r\x0E\x0F" +
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"\x10\x11\x12\x13\x14\x15\x16\x17" +
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"\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f" +
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` !\x22#\$%\x26\x27\(\)\*\x2b,\-\.\/` +
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`0123456789:;\x3c=\x3e\?` +
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`@ABCDEFGHIJKLMNO` +
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`PQRSTUVWXYZ\[\\\]\^_` +
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"`abcdefghijklmno" +
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`pqrstuvwxyz\{\|\}~` + "\u007f" +
|
| 311 |
|
|
"\u00A0\u0100\\u2028\\u2029\ufeff\U0001D11E",
|
| 312 |
|
|
},
|
| 313 |
|
|
}
|
| 314 |
|
|
|
| 315 |
|
|
for _, test := range tests {
|
| 316 |
|
|
if s := test.escaper(input); s != test.escaped {
|
| 317 |
|
|
t.Errorf("%s once: want\n\t%q\ngot\n\t%q", test.name, test.escaped, s)
|
| 318 |
|
|
continue
|
| 319 |
|
|
}
|
| 320 |
|
|
|
| 321 |
|
|
// Escape it rune by rune to make sure that any
|
| 322 |
|
|
// fast-path checking does not break escaping.
|
| 323 |
|
|
var buf bytes.Buffer
|
| 324 |
|
|
for _, c := range input {
|
| 325 |
|
|
buf.WriteString(test.escaper(string(c)))
|
| 326 |
|
|
}
|
| 327 |
|
|
|
| 328 |
|
|
if s := buf.String(); s != test.escaped {
|
| 329 |
|
|
t.Errorf("%s rune-wise: want\n\t%q\ngot\n\t%q", test.name, test.escaped, s)
|
| 330 |
|
|
continue
|
| 331 |
|
|
}
|
| 332 |
|
|
}
|
| 333 |
|
|
}
|
| 334 |
|
|
|
| 335 |
|
|
func BenchmarkJSValEscaperWithNum(b *testing.B) {
|
| 336 |
|
|
for i := 0; i < b.N; i++ {
|
| 337 |
|
|
jsValEscaper(3.141592654)
|
| 338 |
|
|
}
|
| 339 |
|
|
}
|
| 340 |
|
|
|
| 341 |
|
|
func BenchmarkJSValEscaperWithStr(b *testing.B) {
|
| 342 |
|
|
for i := 0; i < b.N; i++ {
|
| 343 |
|
|
jsValEscaper("The quick,\r\nbrown fox jumps\u2028over the dog")
|
| 344 |
|
|
}
|
| 345 |
|
|
}
|
| 346 |
|
|
|
| 347 |
|
|
func BenchmarkJSValEscaperWithStrNoSpecials(b *testing.B) {
|
| 348 |
|
|
for i := 0; i < b.N; i++ {
|
| 349 |
|
|
jsValEscaper("The quick, brown fox jumps over the lazy dog")
|
| 350 |
|
|
}
|
| 351 |
|
|
}
|
| 352 |
|
|
|
| 353 |
|
|
func BenchmarkJSValEscaperWithObj(b *testing.B) {
|
| 354 |
|
|
o := struct {
|
| 355 |
|
|
S string
|
| 356 |
|
|
N int
|
| 357 |
|
|
}{
|
| 358 |
|
|
"The quick,\r\nbrown fox jumps\u2028over the dog\u2028",
|
| 359 |
|
|
42,
|
| 360 |
|
|
}
|
| 361 |
|
|
for i := 0; i < b.N; i++ {
|
| 362 |
|
|
jsValEscaper(o)
|
| 363 |
|
|
}
|
| 364 |
|
|
}
|
| 365 |
|
|
|
| 366 |
|
|
func BenchmarkJSValEscaperWithObjNoSpecials(b *testing.B) {
|
| 367 |
|
|
o := struct {
|
| 368 |
|
|
S string
|
| 369 |
|
|
N int
|
| 370 |
|
|
}{
|
| 371 |
|
|
"The quick, brown fox jumps over the lazy dog",
|
| 372 |
|
|
42,
|
| 373 |
|
|
}
|
| 374 |
|
|
for i := 0; i < b.N; i++ {
|
| 375 |
|
|
jsValEscaper(o)
|
| 376 |
|
|
}
|
| 377 |
|
|
}
|
| 378 |
|
|
|
| 379 |
|
|
func BenchmarkJSStrEscaperNoSpecials(b *testing.B) {
|
| 380 |
|
|
for i := 0; i < b.N; i++ {
|
| 381 |
|
|
jsStrEscaper("The quick, brown fox jumps over the lazy dog.")
|
| 382 |
|
|
}
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
func BenchmarkJSStrEscaper(b *testing.B) {
|
| 386 |
|
|
for i := 0; i < b.N; i++ {
|
| 387 |
|
|
jsStrEscaper("The quick,\r\nbrown fox jumps\u2028over the dog")
|
| 388 |
|
|
}
|
| 389 |
|
|
}
|
| 390 |
|
|
|
| 391 |
|
|
func BenchmarkJSRegexpEscaperNoSpecials(b *testing.B) {
|
| 392 |
|
|
for i := 0; i < b.N; i++ {
|
| 393 |
|
|
jsRegexpEscaper("The quick, brown fox jumps over the lazy dog")
|
| 394 |
|
|
}
|
| 395 |
|
|
}
|
| 396 |
|
|
|
| 397 |
|
|
func BenchmarkJSRegexpEscaper(b *testing.B) {
|
| 398 |
|
|
for i := 0; i < b.N; i++ {
|
| 399 |
|
|
jsRegexpEscaper("The quick,\r\nbrown fox jumps\u2028over the dog")
|
| 400 |
|
|
}
|
| 401 |
|
|
}
|
