Multilabel support & Label refactoring (#17)

Reviewed-on: moritz/ptouch-prnt#17

tests/meson.build

@@ -4,11 +4,6 @@ tests = [
         'bitmap_test_exe',
         ['../src/graphics/Bitmap.cpp', 'bitmap_test/bitmap_test.cpp'],
     ],
-    [
-        'label_test',
-        'label_test_exe',
-        ['../src/graphics/Label.cpp', 'label_test/label_test.cpp'],
-    ],
     [
         'monochrome_test',
         'monochrome_test_exe',
@@ -35,4 +30,22 @@ foreach test : tests
             ],
         ),
     )
-endforeach
+endforeach
+
+# Label test requires GMock for mocking Cairo/Pango
+test(
+    'label_test',
+    executable(
+        'label_test_exe',
+        sources: ['../src/graphics/Label.cpp', 'label_test/label_test.cpp'],
+        include_directories: incdir,
+        dependencies: [
+            gmock_dep,
+            gtest_dep,
+            usb_dep,
+            log_dep,
+            pangocairo_dep,
+            cli11_dep,
+        ],
+    ),
+)