Add a "make test" target

- Then add bizarro workarounds to get it to actually work. But hey,
  the issue for this has only been open in the bug tracker for 7
  years.

CMakeLists.txt

@@ -8,3 +8,20 @@ set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -g3 -Wall -Werror -Wno-sign-c
 
 add_executable(test_basic.testbin
   src/test/test_basic.cc)
+
+enable_testing()
+
+add_test(test_basic bin/test_basic.testbin)
+# CMake test support is a total shitshow. The test targets don't have
+# a dependency on the test binary, and it's in fact impossible to add
+# any dependencies at all for a test target. This means that "make
+# test" will never do the right thing, but just run some random
+# previously compiled versions.
+#
+# All the workarounds suck. This one seems to suck the least; add a
+# test that builds the other tests, and then add this non-standard
+# test-only sequencing dependency to force that test to run first.
+add_test(build_test_code "${CMAKE_COMMAND}" --build ${CMAKE_BINARY_DIR} --target all)
+set_tests_properties(test_basic PROPERTIES DEPENDS build_test_code)
+
+