test: Remove using namespace in header files

"using namespace" in a header file propagates the namespace to
the files including the header file. So it should be avoided.
This removes "using namespace" in header files in test.

Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/test/mapped-buffer.cpp b/test/mapped-buffer.cpp
index 97571945..b4422f7d 100644
--- a/test/mapped-buffer.cpp
+++ b/test/mapped-buffer.cpp
@@ -14,6 +14,7 @@
 #include "camera_test.h"
 #include "test.h"
 
+using namespace libcamera;
 using namespace std;
 
 namespace {