Move around unit test dirs to match new names

src/nix-fetchers-tests/.version

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+../../.version

src/nix-fetchers-tests/build-utils-meson

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+../../build-utils-meson

src/nix-fetchers-tests/data/public-key/defaultType.json

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+{
+  "key": "ABCDE",
+  "type": "ssh-ed25519"
+}

src/nix-fetchers-tests/data/public-key/noRoundTrip.json

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+{
+  "key": "ABCDE"
+}

src/nix-fetchers-tests/data/public-key/simple.json

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+{
+  "key": "ABCDE",
+  "type": "ssh-rsa"
+}

src/nix-fetchers-tests/meson.build

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+project('nix-fetchers-tests', 'cpp',
+  version : files('.version'),
+  default_options : [
+    'cpp_std=c++2a',
+    # TODO(Qyriad): increase the warning level
+    'warning_level=1',
+    'debug=true',
+    'optimization=2',
+    'errorlogs=true', # Please print logs for tests that fail
+  ],
+  meson_version : '>= 1.1',
+  license : 'LGPL-2.1-or-later',
+)
+
+cxx = meson.get_compiler('cpp')
+
+subdir('build-utils-meson/deps-lists')
+
+deps_private_maybe_subproject = [
+  dependency('nix-store-test-support'),
+  dependency('nix-fetchers'),
+]
+deps_public_maybe_subproject = [
+]
+subdir('build-utils-meson/subprojects')
+
+subdir('build-utils-meson/export-all-symbols')
+
+rapidcheck = dependency('rapidcheck')
+deps_private += rapidcheck
+
+gtest = dependency('gtest', main : true)
+deps_private += gtest
+
+add_project_arguments(
+  # TODO(Qyriad): Yes this is how the autoconf+Make system did it.
+  # It would be nice for our headers to be idempotent instead.
+  '-include', 'config-util.hh',
+  '-include', 'config-store.hh',
+  '-include', 'config-store.hh',
+  language : 'cpp',
+)
+
+subdir('build-utils-meson/diagnostics')
+
+sources = files(
+  'public-key.cc',
+)
+
+include_dirs = [include_directories('.')]
+
+
+this_exe = executable(
+  meson.project_name(),
+  sources,
+  dependencies : deps_private_subproject + deps_private + deps_other,
+  include_directories : include_dirs,
+  # TODO: -lrapidcheck, see ../libutil-support/build.meson
+  link_args: linker_export_flags + ['-lrapidcheck'],
+  # get main from gtest
+  install : true,
+)
+
+test(meson.project_name(), this_exe, env : ['_NIX_TEST_UNIT_DATA=' + meson.current_source_dir() + '/data'])

src/nix-fetchers-tests/package.nix

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+{ lib
+, stdenv
+, releaseTools
+
+, meson
+, ninja
+, pkg-config
+
+, nix-fetchers
+, nix-store-test-support
+
+, rapidcheck
+, gtest
+, runCommand
+
+# Configuration Options
+
+, versionSuffix ? ""
+
+# Check test coverage of Nix. Probably want to use with at least
+# one of `doCheck` or `doInstallCheck` enabled.
+, withCoverageChecks ? false
+}:
+
+let
+  inherit (lib) fileset;
+
+  version = lib.fileContents ./.version + versionSuffix;
+
+  mkDerivation =
+    if withCoverageChecks
+    then
+      # TODO support `finalAttrs` args function in
+      # `releaseTools.coverageAnalysis`.
+      argsFun:
+         releaseTools.coverageAnalysis (let args = argsFun args; in args)
+    else stdenv.mkDerivation;
+in
+
+mkDerivation (finalAttrs: {
+  pname = "nix-fetchers-tests";
+  inherit version;
+
+  src = fileset.toSource {
+    root = ./.;
+    fileset = fileset.unions [
+      ./meson.build
+      # ./meson.options
+      (fileset.fileFilter (file: file.hasExt "cc") ./.)
+      (fileset.fileFilter (file: file.hasExt "hh") ./.)
+    ];
+  };
+
+  outputs = [ "out" "dev" ];
+
+  nativeBuildInputs = [
+    meson
+    ninja
+    pkg-config
+  ];
+
+  buildInputs = [
+    nix-fetchers
+    nix-store-test-support
+    rapidcheck
+    gtest
+  ];
+
+  preConfigure =
+    # "Inline" .version so it's not a symlink, and includes the suffix.
+    # Do the meson utils, without modification.
+    ''
+      echo ${version} > .version
+      cp -r ${../../build-utils-meson} build-utils-meson
+    '';
+
+  mesonFlags = [
+  ];
+
+  env = lib.optionalAttrs (stdenv.isLinux && !(stdenv.hostPlatform.isStatic && stdenv.system == "aarch64-linux")) {
+    LDFLAGS = "-fuse-ld=gold";
+  };
+
+  enableParallelBuilding = true;
+
+  separateDebugInfo = !stdenv.hostPlatform.isStatic;
+
+  # TODO Always true after https://github.com/NixOS/nixpkgs/issues/318564
+  strictDeps = !withCoverageChecks;
+
+  hardeningDisable = lib.optional stdenv.hostPlatform.isStatic "pie";
+
+  passthru = {
+    tests = {
+      run = runCommand "${finalAttrs.pname}-run" {
+      } ''
+        PATH="${lib.makeBinPath [ finalAttrs.finalPackage ]}:$PATH"
+        export _NIX_TEST_UNIT_DATA=${./data}
+        nix-fetchers-tests
+        touch $out
+      '';
+    };
+  };
+
+  meta = {
+    platforms = lib.platforms.unix ++ lib.platforms.windows;
+  };
+
+} // lib.optionalAttrs withCoverageChecks {
+  lcovFilter = [ "*/boost/*" "*-tab.*" ];
+
+  hardeningDisable = [ "fortify" ];
+})

src/nix-fetchers-tests/public-key.cc

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+#include <gtest/gtest.h>
+#include "fetchers.hh"
+#include "json-utils.hh"
+#include <nlohmann/json.hpp>
+#include "tests/characterization.hh"
+
+namespace nix {
+
+using nlohmann::json;
+
+class PublicKeyTest : public CharacterizationTest
+{
+    Path unitTestData = getUnitTestData() + "/public-key";
+
+public:
+    Path goldenMaster(std::string_view testStem) const override {
+        return unitTestData + "/" + testStem;
+    }
+};
+
+#define TEST_JSON(FIXTURE, NAME, VAL)                                     \
+    TEST_F(FIXTURE, PublicKey_ ## NAME ## _from_json) {                   \
+        readTest(#NAME ".json", [&](const auto & encoded_) {              \
+            fetchers::PublicKey expected { VAL };                         \
+            fetchers::PublicKey got = nlohmann::json::parse(encoded_);    \
+            ASSERT_EQ(got, expected);                                     \
+        });                                                               \
+    }                                                                     \
+                                                                          \
+    TEST_F(FIXTURE, PublicKey_ ## NAME ## _to_json) {                     \
+        writeTest(#NAME ".json", [&]() -> json {                          \
+            return nlohmann::json(fetchers::PublicKey { VAL });           \
+        }, [](const auto & file) {                                        \
+            return json::parse(readFile(file));                           \
+        }, [](const auto & file, const auto & got) {                      \
+            return writeFile(file, got.dump(2) + "\n");                   \
+        });                                                               \
+    }
+
+TEST_JSON(PublicKeyTest, simple, (fetchers::PublicKey { .type = "ssh-rsa", .key = "ABCDE" }))
+
+TEST_JSON(PublicKeyTest, defaultType, fetchers::PublicKey { .key = "ABCDE" })
+
+#undef TEST_JSON
+
+TEST_F(PublicKeyTest, PublicKey_noRoundTrip_from_json) {
+    readTest("noRoundTrip.json", [&](const auto & encoded_) {
+        fetchers::PublicKey expected = { .type = "ssh-ed25519", .key = "ABCDE" };
+        fetchers::PublicKey got = nlohmann::json::parse(encoded_);
+        ASSERT_EQ(got, expected);
+    });
+}
+
+}