Fix tests compilation in clang

src/app/color_tests.cpp

@@ -22,8 +22,12 @@
 
 using namespace app;
 
-inline std::ostream& operator<<(std::ostream& os, const Color& color) {
+namespace app {
+
+  inline std::ostream& operator<<(std::ostream& os, const Color& color) {
     return os << color.toString();
+  }
+  
 }
 
 TEST(Color, fromRgb)

src/app/document_range_tests.cpp

@@ -31,6 +31,15 @@
 using namespace app;
 using namespace raster;
 
+namespace app {
+
+  std::ostream& operator<<(std::ostream& os, const DocumentRange& range) {
+    return os << "{ layers: [" << range.layerBegin() << ", " << range.layerEnd() << "]"
+              << ", frames: [" << range.frameBegin() << ", " << range.frameEnd() << "] }";
+  }
+
+}
+
 typedef base::UniquePtr<Document> DocumentPtr;
 
 #define EXPECT_LAYER_ORDER(a, b, c, d)               \
@@ -123,11 +132,6 @@ inline DocumentRange frames_range(int frame) {
   return range(0, frame, 0, frame, DocumentRange::kFrames);
 }
 
-std::ostream& operator<<(std::ostream& os, const DocumentRange& range) {
-  return os << "{ layers: [" << range.layerBegin() << ", " << range.layerEnd() << "]"
-            << ", frames: [" << range.frameBegin() << ", " << range.frameEnd() << "] }";
-}
-
 TEST_F(DocRangeOps, MoveLayersNoOp) {
   // Move one layer to the same place
 

src/base/version_tests.cpp

@@ -11,9 +11,12 @@
 
 using namespace base;
 
-std::ostream& operator<<(std::ostream& os, const Version& ver)
+namespace base {
-{
+
+  std::ostream& operator<<(std::ostream& os, const Version& ver) {
     return os << convert_to<std::string>(ver);
+  }
+  
 }
 
 TEST(Version, Ctor)

src/css/css_tests.cpp

@@ -9,10 +9,11 @@
 #include "css/css.h"
 
 using namespace css;
-using namespace std;
 
-ostream& operator<<(ostream& os, const Value& value)
+namespace css {
-{
+
+  std::ostream& operator<<(std::ostream& os, const Value& value)
+  {
     os << "(" << value.type();
 
     if (value.type() == Value::Number)
@@ -22,7 +23,9 @@ ostream& operator<<(ostream& os, const Value& value)
 
     os << ")";
     return os;
-}
+  }
+  
+} // namespace css
 
 TEST(Css, Style)
 {

src/gfx/hsv_tests.cpp

@@ -12,8 +12,10 @@
 using namespace gfx;
 using namespace std;
 
-ostream& operator<<(ostream& os, const Hsv& hsv)
+namespace gfx {
-{
+
+  ostream& operator<<(ostream& os, const Hsv& hsv)
+  {
     return os << "("
               << hsv.hueInt() << ", "
               << hsv.saturationInt() << ", "
@@ -21,6 +23,8 @@ ostream& operator<<(ostream& os, const Hsv& hsv)
               << hsv.hue() << ", "
               << hsv.saturation() << ", "
               << hsv.value() << ")";
+  }
+  
 }
 
 TEST(Hsv, Ctor)

src/gfx/rect_tests.cpp

@@ -13,13 +13,17 @@
 using namespace std;
 using namespace gfx;
 
-ostream& operator<<(ostream& os, const Rect& rect)
+namespace gfx {
-{
+
+  ostream& operator<<(ostream& os, const Rect& rect)
+  {
     return os << "("
               << rect.x << ", "
               << rect.y << ", "
               << rect.w << ", "
               << rect.h << ")";
+  }
+  
 }
 
 TEST(Rect, Ctor)

src/gfx/region_tests.cpp

@@ -12,13 +12,16 @@
 using namespace std;
 using namespace gfx;
 
-ostream& operator<<(ostream& os, const Rect& rect)
+namespace gfx {
-{
+
+  ostream& operator<<(ostream& os, const Rect& rect) {
     return os << "("
               << rect.x << ", "
               << rect.y << ", "
               << rect.w << ", "
               << rect.h << ")";
+  }
+  
 }
 
 ostream& operator<<(ostream& os, const Region& rgn)

src/gfx/rgb_tests.cpp

@@ -12,12 +12,15 @@
 using namespace gfx;
 using namespace std;
 
-ostream& operator<<(ostream& os, const Rgb& rgb)
+namespace gfx {
-{
+
+  ostream& operator<<(ostream& os, const Rgb& rgb) {
     return os << "("
               << rgb.red() << ", "
               << rgb.green() << ", "
               << rgb.blue() << ")";
+  }
+  
 }
 
 TEST(Rgb, Ctor)