test: introduce (mini) unit test framework

Lightweight unit testing framework, providing a structured way to define,
execute, and report tests. It includes a central test registry, a flexible
command-line argument parser of the form "--key=value" / "-k=value" /
"-key=value" (facilitating future framework extensions), ability to run
tests in parallel and accumulated test time logging reports.

So far the supported command-line args are:
- "--jobs=<num>" or "-j=<num>" to specify the number of parallel workers.
- "--seed=<hex>" to specify the RNG seed (random if not set).
- "--iterations=<num>" or "-i=<num>" to specify the number of iterations.

Compatibility Note:
To stay compatible with previous versions, the framework also supports
the two original positional arguments: the iterations count and the
RNG seed (in that order).

Author: furszy

Makefile.am

@@ -47,6 +47,8 @@ noinst_HEADERS += src/assumptions.h
 noinst_HEADERS += src/checkmem.h
 noinst_HEADERS += src/tests_common.h
 noinst_HEADERS += src/testutil.h
+noinst_HEADERS += src/unit_test.h
+noinst_HEADERS += src/unit_test.c
 noinst_HEADERS += src/util.h
 noinst_HEADERS += src/util_local_visibility.h
 noinst_HEADERS += src/int128.h
@@ -121,7 +123,7 @@ if USE_TESTS
 TESTS += noverify_tests
 noinst_PROGRAMS += noverify_tests
 noverify_tests_SOURCES = src/tests.c
-noverify_tests_CPPFLAGS = $(SECP_CONFIG_DEFINES)
+noverify_tests_CPPFLAGS = $(SECP_CONFIG_DEFINES) -DSUPPORTS_CONCURRENCY=$(SUPPORTS_CONCURRENCY)
 noverify_tests_LDADD = $(COMMON_LIB) $(PRECOMPUTED_LIB)
 noverify_tests_LDFLAGS = -static
 if !ENABLE_COVERAGE

configure.ac

@@ -443,6 +443,14 @@ if test x"$enable_experimental" = x"no"; then
   fi
 fi
 
+# Check for concurrency support (tests only)
+if test "x$enable_tests" != x"no"; then
+  AC_CHECK_HEADERS([sys/types.h sys/wait.h unistd.h])
+  AS_IF([test "x$ac_cv_header_sys_types_h" = xyes && test "x$ac_cv_header_sys_wait_h" = xyes &&
+         test "x$ac_cv_header_unistd_h" = xyes], [SUPPORTS_CONCURRENCY=1])
+  AC_SUBST(SUPPORTS_CONCURRENCY)
+fi
+
 ###
 ### Generate output
 ###

src/CMakeLists.txt

@@ -134,12 +134,23 @@ if(SECP256K1_BUILD_BENCHMARK)
 endif()
 
 if(SECP256K1_BUILD_TESTS)
+  include(CheckIncludeFile)
+  check_include_file(sys/types.h HAVE_SYS_TYPES_H)
+  check_include_file(sys/wait.h HAVE_SYS_WAIT_H)
+  check_include_file(unistd.h HAVE_UNISTD_H)
+
+  set(TEST_DEFINITIONS)
+  if(HAVE_SYS_TYPES_H AND HAVE_SYS_WAIT_H AND HAVE_UNISTD_H)
+    list(APPEND TEST_DEFINITIONS SUPPORTS_CONCURRENCY=1)
+  endif()
+
   add_executable(noverify_tests tests.c)
   target_link_libraries(noverify_tests secp256k1_precomputed secp256k1_asm)
+  target_compile_definitions(noverify_tests PRIVATE ${TEST_DEFINITIONS})
   add_test(NAME secp256k1_noverify_tests COMMAND noverify_tests)
   if(NOT CMAKE_BUILD_TYPE STREQUAL "Coverage")
     add_executable(tests tests.c)
-    target_compile_definitions(tests PRIVATE VERIFY)
+    target_compile_definitions(tests PRIVATE VERIFY ${TEST_DEFINITIONS})
     target_link_libraries(tests secp256k1_precomputed secp256k1_asm)
     add_test(NAME secp256k1_tests COMMAND tests)
   endif()