1 files changed, 32 insertions, 0 deletions
diff --git a/src/libstore/tests/outputs-spec.cc b/src/libstore/tests/outputs-spec.cc
index 06e4cabbd..984d1d963 100644
--- a/src/libstore/tests/outputs-spec.cc
+++ b/src/libstore/tests/outputs-spec.cc
@@ -2,6 +2,7 @@
 
 #include <nlohmann/json.hpp>
 #include <gtest/gtest.h>
+#include <rapidcheck/gtest.h>
 
 namespace nix {
 
@@ -199,3 +200,34 @@ TEST_JSON(ExtendedOutputsSpec, names, R"(["a","b"])", (ExtendedOutputsSpec::Expl
 #undef TEST_JSON
 
 }
+
+namespace rc {
+using namespace nix;
+
+Gen<OutputsSpec> Arbitrary<OutputsSpec>::arbitrary()
+{
+    switch (*gen::inRange<uint8_t>(0, 1)) {
+    case 0:
+        return gen::just((OutputsSpec) OutputsSpec::All { });
+    default:
+        return gen::just((OutputsSpec) OutputsSpec::Names {
+            *gen::nonEmpty(gen::container<StringSet>(gen::map(
+                gen::arbitrary<StorePathName>(),
+                [](StorePathName n) { return n.name; }))),
+        });
+    }
+}
+
+}
+
+namespace nix {
+
+RC_GTEST_PROP(
+    OutputsSpec,
+    prop_round_rip,
+    (const OutputsSpec & o))
+{
+    RC_ASSERT(o == OutputsSpec::parse(o.to_string()));
+}
+
+}