lix/tests/unit/libutil/references.cc
John Ericson f7f37035c8 Move tests to separate directories, and document
Today, with the tests inside a `tests` intermingled with the
corresponding library's source code, we have a few problems:

- We have to be careful that wildcards don't end up with tests being
  built as part of Nix proper, or test headers being installed as part
  of Nix proper.

- Tests in libraries but not executables is not right:

  - It means each executable runs the previous unit tests again, because
    it needs the libraries.

  - It doesn't work right on Windows, which doesn't want you to load a
    DLL just for the side global variable . It could be made to work
    with the dlopen equivalent, but that's gross!

This reorg solves these problems.

There is a remaining problem which is that sibbling headers (like
`hash.hh` the test header vs `hash.hh` the main `libnixutil` header) end
up shadowing each other. This PR doesn't solve that. That is left as
future work for a future PR.

Co-authored-by: Valentin Gagarin <valentin.gagarin@tweag.io>

(cherry picked from commit 91b6833686a6a6d9eac7f3f66393ec89ef1d3b57)
(cherry picked from commit a61e42adb528b3d40ce43e07c79368d779a8b624)
2023-12-01 13:05:03 -05:00

47 lines
1.2 KiB
C++

#include "references.hh"
#include <gtest/gtest.h>
namespace nix {
using std::string;
struct RewriteParams {
string originalString, finalString;
StringMap rewrites;
friend std::ostream& operator<<(std::ostream& os, const RewriteParams& bar) {
StringSet strRewrites;
for (auto & [from, to] : bar.rewrites)
strRewrites.insert(from + "->" + to);
return os <<
"OriginalString: " << bar.originalString << std::endl <<
"Rewrites: " << concatStringsSep(",", strRewrites) << std::endl <<
"Expected result: " << bar.finalString;
}
};
class RewriteTest : public ::testing::TestWithParam<RewriteParams> {
};
TEST_P(RewriteTest, IdentityRewriteIsIdentity) {
RewriteParams param = GetParam();
StringSink rewritten;
auto rewriter = RewritingSink(param.rewrites, rewritten);
rewriter(param.originalString);
rewriter.flush();
ASSERT_EQ(rewritten.s, param.finalString);
}
INSTANTIATE_TEST_CASE_P(
references,
RewriteTest,
::testing::Values(
RewriteParams{ "foooo", "baroo", {{"foo", "bar"}, {"bar", "baz"}}},
RewriteParams{ "foooo", "bazoo", {{"fou", "bar"}, {"foo", "baz"}}},
RewriteParams{ "foooo", "foooo", {}}
)
);
}