degesch: add a unit test for message wrapping algo

.travis.yml

@@ -34,6 +34,6 @@ before_script:
 script:
  - cmake .. -DCMAKE_INSTALL_PREFIX=/usr
    -DWANT_READLINE=$readline -DWANT_LIBEDIT=$libedit
- - make
+ - make all test
  - cpack -G DEB
  - ../test

CMakeLists.txt

@@ -122,6 +122,23 @@ target_link_libraries (degesch ${project_libraries})
 add_executable (kike kike.c kike-replies.c ${common_sources} ${common_headers})
 target_link_libraries (kike ${project_libraries})
 
+# Tests
+function (make_tests_for target_name)
+	get_target_property (sources   ${target_name} SOURCES)
+	get_target_property (libraries ${target_name} LINK_LIBRARIES)
+
+	set (test test-${target_name})
+	add_executable (${test} ${sources})
+	target_link_libraries (${test} ${libraries})
+	add_test (NAME ${test} COMMAND ${test})
+	set_target_properties (${test} PROPERTIES COMPILE_DEFINITIONS TESTING)
+endfunction (make_tests_for)
+
+include (CTest)
+if (BUILD_TESTING)
+	make_tests_for (degesch)
+endif (BUILD_TESTING)
+
 # Various clang-based diagnostics, loads of fake positives and spam
 file (GLOB clang_tidy_sources *.c)
 set (clang_tidy_checks misc-* readability-*

degesch.c

@@ -11197,6 +11197,42 @@ init_poller_events (struct app_context *ctx)
 	ctx->autoaway_tmr.user_data = ctx;
 }
 
+// --- Tests -------------------------------------------------------------------
+
+// The application is quite monolithic and can only be partially unit-tested
+
+#ifdef TESTING
+
+static void
+test_wrapping (void)
+{
+	struct str_vector v;
+	str_vector_init (&v);
+
+	static const char *message = " foo bar foobar fóóbárbáz";
+	static const char *split[] =
+		{ " foo", "bar", "foob", "ar", "fó", "ób", "árb", "áz" };
+
+	hard_assert (wrap_message (message, 4, &v, NULL));
+	hard_assert (v.len == N_ELEMENTS (split));
+	for (size_t i = 0; i < N_ELEMENTS (split); i++)
+		hard_assert (!strcmp (v.vector[i], split[i]));
+
+	str_vector_free (&v);
+}
+
+int
+main (int argc, char *argv[])
+{
+	struct test test;
+	test_init (&test, argc, argv);
+	test_add_simple (&test, "/wrapping", NULL, test_wrapping);
+	return test_run (&test);
+}
+
+#define main main_shadowed
+#endif // TESTING
+
 // --- Main program ------------------------------------------------------------
 
 static const char *g_logo[] =