Revert "move libexpr unit test logic to functional test"

This reverts commit 87605c539cdf361b2a416a7e12c1e3e5da85161d.

tests/functional/local.mk

@@ -106,7 +106,6 @@ nix_tests = \
   eval-store.sh \
   why-depends.sh \
   derivation-json.sh \
-  derivation-advanced-attributes.sh \
   import-derivation.sh \
   nix_path.sh \
   case-hack.sh \

tests/unit/libexpr/derivation.cc

@@ -0,0 +1,50 @@
+#include "gtest/gtest.h"
+#include <string>
+#include "tests/characterization.hh"
+#include "tests/libexpr.hh"
+#include "derivations.hh"
+
+namespace nix {
+
+class DerivationTest : public CharacterizationTest, public LibExprTest
+{
+    Path unitTestData = getUnitTestData() + "/derivation";
+
+public:
+    Path goldenMaster(std::string_view testStem) const override
+    {
+        return unitTestData + "/" + testStem;
+    }
+};
+
+#define EXPR_DRV_TEST(NAME, STEM)                                                               \
+    TEST_F(DerivationTest, Derivation_##NAME)                                                   \
+    {                                                                                           \
+        writeTest(                                                                              \
+            STEM ".drv",                                                                        \
+            [&]() -> Derivation {                                                               \
+                Value v = eval(readFile(goldenMaster(STEM ".nix")));                            \
+                Symbol s = state.symbols.create("drvPath");                                     \
+                auto attr = v.attrs() -> get(s);                                                \
+                state.forceValueDeep(*attr->value);                                             \
+                NixStringContext context;                                                       \
+                auto storePath = state.coerceToStorePath(attr->pos, *attr->value, context, ""); \
+                                                                                                \
+                return store->readDerivation(storePath);                                        \
+            },                                                                                  \
+            [&](const auto & file) {                                                            \
+                auto s = readFile(file);                                                        \
+                return parseDerivation(*store, std::move(s), STEM);                             \
+            },                                                                                  \
+            [&](const auto & file, const auto & got) {                                          \
+                auto s = got.unparse(*store, false);                                            \
+                return writeFile(file, std::move(s));                                           \
+            });                                                                                 \
+    }
+
+EXPR_DRV_TEST(advancedAttributes, "advanced-attributes");
+EXPR_DRV_TEST(advancedAttributes_defaults, "advanced-attributes-defaults");
+EXPR_DRV_TEST(advancedAttributes_structuredAttrs, "advanced-attributes-structured-attrs");
+EXPR_DRV_TEST(advancedAttributes_structuredAttrs_defaults, "advanced-attributes-structured-attrs-defaults");
+
+}

tests/unit/libstore/data/derivation/advanced-attributes-defaults.drv

@@ -1 +1 @@
-../../../../functional/derivation/advanced-attributes-defaults.drv
+../../../libexpr/data/derivation/advanced-attributes-defaults.drv

tests/unit/libstore/data/derivation/advanced-attributes-structured-attrs-defaults.drv

@@ -1 +1 @@
-../../../../functional/derivation/advanced-attributes-structured-attrs-defaults.drv
+../../../libexpr/data/derivation/advanced-attributes-structured-attrs-defaults.drv

tests/unit/libstore/data/derivation/advanced-attributes-structured-attrs.drv

@@ -1 +1 @@
-../../../../functional/derivation/advanced-attributes-structured-attrs.drv
+../../../libexpr/data/derivation/advanced-attributes-structured-attrs.drv

tests/unit/libstore/data/derivation/advanced-attributes.drv

@@ -1 +1 @@
-../../../../functional/derivation/advanced-attributes.drv
+../../../libexpr/data/derivation/advanced-attributes.drv