tests/: Add CMocka unit-test infrastructure

This adds the CMocka unit-testing infrastructure into
the meson build system which we will latter follow up
with unit-tests for flashrom's core logic.

BUG=b:157280555
BRANCH=none
TEST=builds

Change-Id: I66665f56627b3d99049176bfbebbd771b080370a
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/41622
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

tests/include/test.h

@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#ifndef _TESTS_TEST_H
+#define _TESTS_TEST_H
+
+/*
+ * Standard test header that should be included in all tests. For now it just encapsulates the
+ * include dependencies for Cmocka. Test-specific APIs that are so generic we would want them
+ * available everywhere could also be added here.
+ */
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+#endif /* _TESTS_TEST_H */

tests/meson.build

@@ -0,0 +1,28 @@
+root_includes = include_directories('../subprojects')
+
+srcs = [
+  'tests.c',
+]
+
+mocks = [
+  '-Wl,--wrap=physunmap',
+  '-Wl,--wrap=physmap',
+  '-Wl,--gc-sections',
+]
+
+flashrom_tests = executable('flashrom_unit_tests',
+  srcs,
+  include_directories : root_includes,
+  c_args : [
+    cargs,
+    '-ffunction-sections',
+    '-fdata-sections',
+    #    '-DSTANDALONE',
+    '-DCONFIG_DEFAULT_PROGRAMMER=PROGRAMMER_DUMMY',
+    '-DCONFIG_DEFAULT_PROGRAMMER_ARGS=""',
+  ],
+  export_dynamic : true,
+  link_args : mocks,
+  dependencies : [cmocka_dep, flashrom_test_dep],
+)
+test('cmocka test flashrom', flashrom_tests)

tests/tests.c

@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* This file is part of the coreboot project. */
+
+#include <include/test.h>
+#include "tests.h"
+
+#include <stdio.h>
+
+/* redefinitions/wrapping */
+void __wrap_physunmap(void *virt_addr, size_t len)
+{
+	fprintf(stderr, "%s\n", __func__);
+}
+void *__wrap_physmap(const char *descr, uintptr_t phys_addr, size_t len)
+{
+	fprintf(stderr, "%s\n", __func__);
+	return NULL;
+}
+
+int main(void)
+{
+	int ret = 0;
+
+	return ret;
+}

tests/tests.h

@@ -0,0 +1,4 @@
+#ifndef TESTS_H
+#define TESTS_H
+
+#endif /* TESTS_H */