mirror of
https://github.com/NixOS/nix
synced 2025-07-01 12:37:59 +02:00
f3e1c47f47
The short answer for why we need to do this is so we can consistently do `#include "nix/..."`. Without this change, there are ways to still make that work, but they are hacky, and they have downsides such as making it harder to make sure headers from the wrong Nix library (e..g. `libnixexpr` headers in `libnixutil`) aren't being used. The C API alraedy used `nix_api_*`, so its headers are *not* put in subdirectories accordingly. Progress on #7876 We resisted doing this for a while because it would be annoying to not have the header source file pairs close by / easy to change file path/name from one to the other. But I am ameliorating that with symlinks in the next commit.
122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
#include <gtest/gtest.h>
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#include "nix/position.hh"
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namespace nix {
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inline Pos::Origin makeStdin(std::string s)
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{
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return Pos::Stdin{make_ref<std::string>(s)};
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}
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TEST(Position, getSnippetUpTo_0)
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{
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Pos::Origin o = makeStdin("");
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Pos p(1, 1, o);
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ASSERT_EQ(p.getSnippetUpTo(p), "");
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}
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TEST(Position, getSnippetUpTo_1)
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{
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Pos::Origin o = makeStdin("x");
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{
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// NOTE: line and column are actually 1-based indexes
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Pos start(0, 0, o);
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Pos end(99, 99, o);
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ASSERT_EQ(start.getSnippetUpTo(start), "");
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ASSERT_EQ(start.getSnippetUpTo(end), "x");
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ASSERT_EQ(end.getSnippetUpTo(end), "");
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ASSERT_EQ(end.getSnippetUpTo(start), std::nullopt);
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}
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{
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// NOTE: line and column are actually 1-based indexes
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Pos start(0, 99, o);
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Pos end(99, 0, o);
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ASSERT_EQ(start.getSnippetUpTo(start), "");
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// "x" might be preferable, but we only care about not crashing for invalid inputs
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ASSERT_EQ(start.getSnippetUpTo(end), "");
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ASSERT_EQ(end.getSnippetUpTo(end), "");
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ASSERT_EQ(end.getSnippetUpTo(start), std::nullopt);
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}
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{
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Pos start(1, 1, o);
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Pos end(1, 99, o);
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ASSERT_EQ(start.getSnippetUpTo(start), "");
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ASSERT_EQ(start.getSnippetUpTo(end), "x");
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ASSERT_EQ(end.getSnippetUpTo(end), "");
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ASSERT_EQ(end.getSnippetUpTo(start), "");
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}
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{
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Pos start(1, 1, o);
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Pos end(99, 99, o);
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ASSERT_EQ(start.getSnippetUpTo(start), "");
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ASSERT_EQ(start.getSnippetUpTo(end), "x");
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ASSERT_EQ(end.getSnippetUpTo(end), "");
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ASSERT_EQ(end.getSnippetUpTo(start), std::nullopt);
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}
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}
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TEST(Position, getSnippetUpTo_2)
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{
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Pos::Origin o = makeStdin("asdf\njkl\nqwer");
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{
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Pos start(1, 1, o);
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Pos end(1, 2, o);
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ASSERT_EQ(start.getSnippetUpTo(start), "");
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ASSERT_EQ(start.getSnippetUpTo(end), "a");
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ASSERT_EQ(end.getSnippetUpTo(end), "");
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// nullopt? I feel like changing the column handling would just make it more fragile
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ASSERT_EQ(end.getSnippetUpTo(start), "");
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}
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{
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Pos start(1, 2, o);
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Pos end(1, 3, o);
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ASSERT_EQ(start.getSnippetUpTo(end), "s");
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}
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{
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Pos start(1, 2, o);
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Pos end(2, 2, o);
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ASSERT_EQ(start.getSnippetUpTo(end), "sdf\nj");
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}
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{
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Pos start(1, 2, o);
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Pos end(3, 2, o);
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ASSERT_EQ(start.getSnippetUpTo(end), "sdf\njkl\nq");
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}
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{
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Pos start(1, 2, o);
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Pos end(2, 99, o);
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ASSERT_EQ(start.getSnippetUpTo(end), "sdf\njkl");
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}
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{
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Pos start(1, 4, o);
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Pos end(2, 99, o);
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ASSERT_EQ(start.getSnippetUpTo(end), "f\njkl");
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}
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{
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Pos start(1, 5, o);
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Pos end(2, 99, o);
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ASSERT_EQ(start.getSnippetUpTo(end), "\njkl");
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}
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{
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Pos start(1, 6, o); // invalid: starting column past last "line character", ie at the newline
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Pos end(2, 99, o);
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ASSERT_EQ(start.getSnippetUpTo(end), "\njkl"); // jkl might be acceptable for this invalid start position
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}
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{
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Pos start(1, 1, o);
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Pos end(2, 0, o); // invalid
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ASSERT_EQ(start.getSnippetUpTo(end), "asdf\n");
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}
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}
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TEST(Position, example_1)
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{
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Pos::Origin o = makeStdin(" unambiguous = \n /** Very close */\n x: x;\n# ok\n");
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Pos start(2, 5, o);
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Pos end(2, 22, o);
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ASSERT_EQ(start.getSnippetUpTo(end), "/** Very close */");
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}
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} // namespace nix
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