Add rapidcheck dependency for testing

Property tests are great!

Co-authored-by: Cole Helbling <cole.e.helbling@outlook.com>

configure.ac

@@ -274,6 +274,12 @@ fi
 PKG_CHECK_MODULES([GTEST], [gtest_main])
 
 
+# Look for rapidcheck.
+# No pkg-config yet, https://github.com/emil-e/rapidcheck/issues/302
+AC_CHECK_HEADERS([rapidcheck/gtest.h], [], [], [#include <gtest/gtest.h>])
+AC_CHECK_LIB([rapidcheck], [])
+
+
 # Look for nlohmann/json.
 PKG_CHECK_MODULES([NLOHMANN_JSON], [nlohmann_json >= 3.9])
 

doc/manual/src/contributing/hacking.md

@@ -92,7 +92,8 @@ $ nix develop
 
 The unit-tests for each Nix library (`libexpr`, `libstore`, etc..) are defined
 under `src/{library_name}/tests` using the
-[googletest](https://google.github.io/googletest/) framework.
+[googletest](https://google.github.io/googletest/) and
+[rapidcheck](https://github.com/emil-e/rapidcheck) frameworks.
 
 You can run the whole testsuite with `make check`, or the tests for a specific component with `make libfoo-tests_RUN`. Finer-grained filtering is also possible using the [--gtest_filter](https://google.github.io/googletest/advanced.html#running-a-subset-of-the-tests) command-line option.
 

flake.nix

@@ -82,7 +82,9 @@
         });
 
         configureFlags =
-          lib.optionals stdenv.isLinux [
+          [
+            "CXXFLAGS=-I${lib.getDev rapidcheck}/extras/gtest/include"
+          ] ++ lib.optionals stdenv.isLinux [
             "--with-boost=${boost}/lib"
             "--with-sandbox-shell=${sh}/bin/busybox"
           ]
@@ -116,6 +118,7 @@
             boost
             lowdown-nix
             gtest
+            rapidcheck
           ]
           ++ lib.optionals stdenv.isLinux [libseccomp]
           ++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium

src/libstore/tests/local.mk

@@ -12,4 +12,4 @@ libstore-tests_CXXFLAGS += -I src/libstore -I src/libutil
 
 libstore-tests_LIBS = libstore libutil
 
-libstore-tests_LDFLAGS := $(GTEST_LIBS)
+libstore-tests_LDFLAGS := -lrapidcheck $(GTEST_LIBS)