More property tests

Also put proper comparison methods on `DerivedPath` and
`NixStringContextElem`, which is needed for the tests but good in
general.

1 files changed, 21 insertions, 1 deletions

diff --git a/src/libutil/tests/hash.cc b/src/libutil/tests/hash.cc
index 412c03030..e4e928b3b 100644
--- a/src/libutil/tests/hash.cc
+++ b/src/libutil/tests/hash.cc
@@ -1,5 +1,12 @@
-#include "hash.hh"
+#include <regex>
+
+#include <nlohmann/json.hpp>
 #include <gtest/gtest.h>
+#include <rapidcheck/gtest.h>
+
+#include <hash.hh>
+
+#include "tests/hash.hh"
 
 namespace nix {
 
@@ -73,3 +80,16 @@ namespace nix {
                 "c7d329eeb6dd26545e96e55b874be909");
     }
 }
+
+namespace rc {
+using namespace nix;
+
+Gen<Hash> Arbitrary<Hash>::arbitrary()
+{
+    Hash hash(htSHA1);
+    for (size_t i = 0; i < hash.hashSize; ++i)
+        hash.hash[i] = *gen::arbitrary<uint8_t>();
+    return gen::just(hash);
+}
+
+}