tests add to namespace sls (#464)

slsDetectorSoftware/tests/test-Pattern.cpp

@@ -3,7 +3,7 @@
 #include "catch.hpp"
 #include "sls/Pattern.h"
 
-using sls::Pattern;
+namespace sls {
 
 TEST_CASE("Pattern is default constructable and has zeroed fields") {
     Pattern p;
@@ -27,3 +27,5 @@ TEST_CASE("Compare patterns") {
     p1.data()->word[500] = 1;
     REQUIRE_FALSE(p == p1);
 }
+
+} // namespace sls