integrates cwalktest with meson build system

* adds `ENABLE_TESTS` option to meson project
* adds conditional compilation of `cwalktest` executable
* registers `cwalktest` test with meson project

meson.build

@@ -14,3 +14,7 @@ cwalk = library('cwalk', 'src/cwalk.c',
 install_headers('include/cwalk.h')
 
 cwalk_dep = declare_dependency(include_directories: 'include', link_with: cwalk)
+
+if get_option('ENABLE_TESTS')
+  subdir('test')
+endif

meson_options.txt

@@ -0,0 +1 @@
+option('ENABLE_TESTS', type: 'boolean', value: false, description: 'Enables building test executables')

test/meson.build

@@ -0,0 +1,23 @@
+cwalktest_sources = files(
+    'main.c',
+    'absolute_test.c',
+    'basename_test.c',
+    'dirname_test.c',
+    'extension_test.c',
+    'guess_test.c',
+    'intersection_test.c',
+    'is_absolute_test.c',
+    'is_relative_test.c',
+    'join_test.c',
+    'normalize_test.c',
+    'relative_test.c',
+    'root_test.c',
+    'segment_test.c',
+    'windows_test.c',
+)
+
+cwalktest = executable('cwalktest',
+    sources: cwalktest_sources,
+    dependencies: cwalk_dep,
+)
+test('cwalktest', cwalktest)