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/*
* StringUtils.cpp
*
* Copyright (C) 2022 by Posit Software, PBC
*
* Unless you have received this program directly from Posit Software pursuant
* to the terms of a commercial license agreement with Posit Software, then
* this program is licensed to you under the terms of version 3 of the
* GNU Affero General Public License. This program is distributed WITHOUT
* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
*
*/
#
include
<
tests/TestThat.hpp
>
#
include
<
core/Algorithm.hpp
>
#
include
<
core/StringUtils.hpp
>
#
define
kLatexStyleLineCommentRegex
(
"
^%+
\\
s*
"
)
namespace
rstudio
{
namespace
core
{
namespace
string_utils
{
using
namespace
algorithm
;
test_context
(
"
String splitting
"
)
{
test_that
(
"
Strings can be split on NUL bytes
"
)
{
std::string
text
(
"
a
\0
b
\0
c
"
,
5
);
std::string
delim
(
"
\0
"
,
1
);
std::vector<std::string> splat =
split
(text, delim);
expect_true
(splat.
size
() ==
3
);
expect_true
(splat[
0
] ==
"
a
"
);
expect_true
(splat[
1
] ==
"
b
"
);
expect_true
(splat[
2
] ==
"
c
"
);
}
test_that
(
"
raw delimiters containing null bytes can be split
"
)
{
std::string
text
(
"
a
\0
b
\0
c
"
,
5
);
std::vector<std::string> splat =
split
(text,
"
\0
"
);
expect_true
(splat.
size
() ==
3
);
expect_true
(splat[
0
] ==
"
a
"
);
expect_true
(splat[
1
] ==
"
b
"
);
expect_true
(splat[
2
] ==
"
c
"
);
}
}
test_context
(
"
isSubsequence
"
)
{
test_that
(
"
isSubsequence works
"
)
{
expect_true
(
isSubsequence
(
"
"
,
"
"
));
expect_true
(
isSubsequence
(
"
annnbnnnc
"
,
"
abc
"
));
expect_false
(
isSubsequence
(
"
abcdef
"
,
"
abdcef
"
));
expect_true
(
isSubsequence
(
"
abcdef
"
,
"
AeF
"
,
true
));
expect_true
(
isSubsequence
(
"
a1d2
"
,
"
12
"
));
}
test_that
(
"
strippedOfBackQuotes works
"
)
{
std::string string =
"
`abc`
"
;
std::string stripped =
strippedOfBackQuotes
(string);
expect_true
(stripped ==
"
abc
"
);
expect_true
(
strippedOfBackQuotes
(
"
abc
"
) ==
"
abc
"
);
}
test_that
(
"
substring works
"
)
{
std::string
string
(
"
abc
"
);
expect_true
(
substring
(string,
2
,
5
) ==
"
abc
"
);
}
test_that
(
"
trimWhitespace works
"
)
{
std::string
string
(
"
abc
"
);
expect_true
(
trimWhitespace
(string) ==
"
abc
"
);
expect_true
(
trimWhitespace
(
"
abc
"
) ==
"
abc
"
);
expect_true
(
trimWhitespace
(
"
"
) ==
"
"
);
}
test_that
(
"
countNewLines works with empty string
"
)
{
std::string
str
(
"
"
);
expect_true
(
countNewlines
(str) ==
0
);
}
test_that
(
"
countNewLines works with line feed
"
)
{
std::string
str
(
"
\n\n\n
"
);
expect_true
(
countNewlines
(str) ==
3
);
}
test_that
(
"
countNewLines works with carriage return/line feed
"
)
{
std::string
str
(
"
\r\n\r\n
"
);
expect_true
(
countNewlines
(str) ==
2
);
}
}
test_context
(
"
Comment extraction
"
)
{
test_that
(
"
Comment headers can be extracted
"
)
{
std::string
text
(
"
% This is a header.
\n
"
"
% Let's hope the text is extracted.
\n
"
"
\n
"
"
This should be ignored.
"
);
std::string extracted;
bool
success =
extractCommentHeader
(text,
kLatexStyleLineCommentRegex
, &extracted);
std::string
expected
(
"
This is a header.
\n
"
"
Let's hope the text is extracted.
\n
"
);
expect_true
(success);
expect_true
(extracted == expected);
}
test_that
(
"
Comment headers with no trailing newline are handled
"
)
{
std::string
text
(
"
% Hello
\n
% World
"
);
std::string extracted;
bool
success =
extractCommentHeader
(text,
kLatexStyleLineCommentRegex
, &extracted);
std::string
expected
(
"
Hello
\n
World
\n
"
);
expect_true
(success);
expect_true
(extracted == expected);
}
test_that
(
"
Edge cases are handled
"
)
{
std::string extracted;
expect_false
(
extractCommentHeader
(
"
"
,
kLatexStyleLineCommentRegex
, &extracted));
std::string
text
(
"
There is a comment
\n
"
"
% but not at the start of the document.
\n
"
);
expect_false
(
extractCommentHeader
(text,
kLatexStyleLineCommentRegex
, &extracted));
}
test_that
(
"
JavaScript literals are escaped
"
)
{
expect_true
(
jsLiteralEscape
(
"
\"
hello
\"
"
) ==
"
\\\"
hello
\\\"
"
);
expect_true
(
jsLiteralEscape
(
"
'goodbye'
"
) ==
"
\\
'goodbye
\\
'
"
);
expect_true
(
jsLiteralEscape
(
"
</script>
"
) ==
"
\\
074/script>
"
);
}
test_that
(
"
HTML tags in JSON are escaped
"
)
{
expect_true
(
jsonHtmlEscape
(
"
<h1>
"
) ==
"
\\
u003ch1
\\
u003e
"
);
expect_true
(
jsonHtmlEscape
(
"
<script>alert!
"
) ==
"
\\
u003cscript
\\
u003ealert!
"
);
}
}
test_context
(
"
String formatting
"
)
{
test_that
(
"
Some simple strings can be formatted
"
)
{
std::string s;
s =
string_utils::sprintf
(
"
%s, %s!
"
,
"
Hello
"
,
"
world
"
);
expect_true
(s ==
"
Hello, world!
"
);
s =
string_utils::sprintf
(
"
%i + %i == %i
"
,
2
,
2
,
2
+
2
);
expect_true
(s ==
"
2 + 2 == 4
"
);
}
}
}
//
end namespace string_utils
}
//
end namespace core
}
//
end namespace rstudio
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