Improve filter tests

Fix a bug in Pipe::check_available that must date back 15 years...

Add destructors to compression filter so unique_ptr destructor runs
without user having to include an extra header for the owned type.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/tests/tests.cpp b/src/tests/tests.cpp
index 6a7e6292a..a6b6bf802 100644
--- a/src/tests/tests.cpp
+++ b/src/tests/tests.cpp
@@ -232,7 +232,7 @@ bool Test::Result::test_eq(const std::string& what, OctetString produced, OctetS
       }
    else
       {
-      out << " produced unexpected result " << produced.as_string() << " expected " << expected.as_string();
+      out << " produced unexpected result '" << produced.as_string() << "' expected '" << expected.as_string() << "'";
       return test_failure(out.str());
       }
    }