Remove the test binary split

tests/meson.build

@@ -1,51 +1,29 @@
-tests = [
-    [
-        'bitmap_test',
-        'bitmap_test_exe',
-        ['../src/graphics/Bitmap.cpp', 'bitmap_test/bitmap_test.cpp'],
-    ],
-    [
-        'monochrome_test',
-        'monochrome_test_exe',
-        [
-            '../src/graphics/Monochrome.cpp',
-            'monochrome_test/monochrome_test.cpp',
-        ],
-    ],
+# Consolidated test binary - all tests in one executable for faster linking
+
+test_sources = [
+    # Test files
+    'bitmap_test/bitmap_test.cpp',
+    'monochrome_test/monochrome_test.cpp',
+    'label_test/label_test.cpp',
+
+    # Source files under test
+    '../src/graphics/Bitmap.cpp',
+    '../src/graphics/Monochrome.cpp',
+    '../src/graphics/Label.cpp',
 ]
 
-foreach test : tests
-    test(
-        test.get(0),
-        executable(
-            test.get(1),
-            sources: test.get(2),
-            include_directories: incdir,
-            dependencies: [
-                gtest_dep,
-                usb_dep,
-                log_dep,
-                pangocairo_dep,
-                cli11_dep,
-            ],
-        ),
-    )
-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,
-        ],
-    ),
+test_exe = executable(
+    'ptprnt_tests',
+    sources: test_sources,
+    include_directories: incdir,
+    dependencies: [
+        gmock_dep,  # GMock includes GTest
+        usb_dep,
+        log_dep,
+        pangocairo_dep,
+        cli11_dep,
+    ],
 )
+
+# Single test that runs all test suites
+test('all_tests', test_exe)