1 files changed, 11 insertions, 0 deletions
diff --git a/src/libutil/tests/canon-path.cc b/src/libutil/tests/canon-path.cc
index c1c5adadf..8fbcf0ddf 100644
--- a/src/libutil/tests/canon-path.cc
+++ b/src/libutil/tests/canon-path.cc
@@ -152,4 +152,15 @@ namespace nix {
             ASSERT_TRUE (CanonPath("/").isAllowed(allowed));
         }
     }
+
+    TEST(CanonPath, makeRelative) {
+        CanonPath d("/foo/bar");
+        ASSERT_EQ(d.makeRelative(CanonPath("/foo/bar")), ".");
+        ASSERT_EQ(d.makeRelative(CanonPath("/foo")), "..");
+        ASSERT_EQ(d.makeRelative(CanonPath("/")), "../..");
+        ASSERT_EQ(d.makeRelative(CanonPath("/foo/bar/xyzzy")), "xyzzy");
+        ASSERT_EQ(d.makeRelative(CanonPath("/foo/bar/xyzzy/bla")), "xyzzy/bla");
+        ASSERT_EQ(d.makeRelative(CanonPath("/foo/xyzzy/bla")), "../xyzzy/bla");
+        ASSERT_EQ(d.makeRelative(CanonPath("/xyzzy/bla")), "../../xyzzy/bla");
+    }
 }