[PATCH 2/2] unit: Test unlimited objects configuration

[Sebastian Huber]

From: Frank Kühndel <frank.kuehndel at embedded-brains.de>

This unit test covers code paths which are only reached if unlimited
objects are used.

Update #3716.
---
 .../build/testsuites/unit/unit-no-clock-0.yml |   1 +
 testsuites/unit/tc-config.c                   | 171 ++++++++++++++++++
 2 files changed, 172 insertions(+)
 create mode 100644 testsuites/unit/tc-config.c

diff --git a/spec/build/testsuites/unit/unit-no-clock-0.yml b/spec/build/testsuites/unit/unit-no-clock-0.yml
index 517b84284d..797e4cbd8a 100644
--- a/spec/build/testsuites/unit/unit-no-clock-0.yml
+++ b/spec/build/testsuites/unit/unit-no-clock-0.yml
@@ -11,6 +11,7 @@ includes: []
 ldflags: []
 links: []
 source:
+- testsuites/unit/tc-config.c
 - testsuites/unit/tc-misaligned-builtin-memcpy.c
 - testsuites/unit/tc-score-msgq.c
 - testsuites/unit/tc-score-rbtree.c
diff --git a/testsuites/unit/tc-config.c b/testsuites/unit/tc-config.c
new file mode 100644
index 0000000000..415142e1b4
--- /dev/null
+++ b/testsuites/unit/tc-config.c
@@ -0,0 +1,171 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @ingroup RtemsConfigUnitConfig
+ */
+
+/*
+ * Copyright (C) 2021 embedded brains GmbH & Co. KG
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*
+ * This file is part of the RTEMS quality process and was automatically
+ * generated.  If you find something that needs to be fixed or
+ * worded better please post a report or patch to an RTEMS mailing list
+ * or raise a bug report:
+ *
+ * https://www.rtems.org/bugs.html
+ *
+ * For information on updating and regenerating please refer to the How-To
+ * section in the Software Requirements Engineering chapter of the
+ * RTEMS Software Engineering manual.  The manual is provided as a part of
+ * a release.  For development sources please refer to the online
+ * documentation at:
+ *
+ * https://docs.rtems.org
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems.h>
+#include <rtems/rtems/semdata.h>
+#include <rtems/score/object.h>
+#include <rtems/score/objectdata.h>
+
+#include <rtems/test.h>
+
+/**
+ * @defgroup RtemsConfigUnitConfig spec:/rtems/config/unit/config
+ *
+ * @ingroup TestsuitesUnitNoClock0
+ *
+ * @brief Unit tests for the configuration manager.
+ *
+ * Parts of the file ``cpukit/sapi/src/getconfigmax.c`` are only executed when
+ * unlimited objects are configured.  The space qualified code subset does not
+ * support this feature.  This test exercises the code parts otherwise not
+ * reached in order to achieve full code coverage.
+ *
+ * This test case performs the following actions:
+ *
+ * - Call get_config_max() indirectly through
+ *   rtems_configuration_get_maximum_semaphores() with a specially manipulated
+ *   argument to enter an if-branch only accessed when unlimited objects are
+ *   configured.
+ *
+ *   - The value returned by the function call must be the one artificially
+ *     injected by this test.
+ *
+ * @{
+ */
+
+#define SEMAPHORES_PER_BLOCK 32
+
+/**
+ * @brief Test context for spec:/rtems/config/unit/config test case.
+ */
+typedef struct {
+  /**
+   * @brief This member contains the original value of
+   *   ``_Semaphore_Information->objects_per_block``.
+   */
+  Objects_Maximum objects_per_block_ori;
+} RtemsConfigUnitConfig_Context;
+
+static RtemsConfigUnitConfig_Context
+  RtemsConfigUnitConfig_Instance;
+
+static void RtemsConfigUnitConfig_Setup( RtemsConfigUnitConfig_Context *ctx )
+{
+  ctx->objects_per_block_ori = _Semaphore_Information.objects_per_block;
+  _Semaphore_Information.objects_per_block = SEMAPHORES_PER_BLOCK;
+}
+
+static void RtemsConfigUnitConfig_Setup_Wrap( void *arg )
+{
+  RtemsConfigUnitConfig_Context *ctx;
+
+  ctx = arg;
+  RtemsConfigUnitConfig_Setup( ctx );
+}
+
+static void RtemsConfigUnitConfig_Teardown(
+  RtemsConfigUnitConfig_Context *ctx
+)
+{
+  _Semaphore_Information.objects_per_block = ctx->objects_per_block_ori;
+}
+
+static void RtemsConfigUnitConfig_Teardown_Wrap( void *arg )
+{
+  RtemsConfigUnitConfig_Context *ctx;
+
+  ctx = arg;
+  RtemsConfigUnitConfig_Teardown( ctx );
+}
+
+static T_fixture RtemsConfigUnitConfig_Fixture = {
+  .setup = RtemsConfigUnitConfig_Setup_Wrap,
+  .stop = NULL,
+  .teardown = RtemsConfigUnitConfig_Teardown_Wrap,
+  .scope = NULL,
+  .initial_context = &RtemsConfigUnitConfig_Instance
+};
+
+/**
+ * @brief Call get_config_max() indirectly through
+ *   rtems_configuration_get_maximum_semaphores() with a specially manipulated
+ *   argument to enter an if-branch only accessed when unlimited objects are
+ *   configured.
+ */
+static void RtemsConfigUnitConfig_Action_0(
+  RtemsConfigUnitConfig_Context *ctx
+)
+{
+  uint32_t max = rtems_configuration_get_maximum_semaphores();
+
+  /*
+   * The value returned by the function call must be the one artificially
+   * injected by this test.
+   */
+  T_eq_u32( max, SEMAPHORES_PER_BLOCK | RTEMS_UNLIMITED_OBJECTS );
+}
+
+/**
+ * @fn void T_case_body_RtemsConfigUnitConfig( void )
+ */
+T_TEST_CASE_FIXTURE( RtemsConfigUnitConfig, &RtemsConfigUnitConfig_Fixture )
+{
+  RtemsConfigUnitConfig_Context *ctx;
+
+  ctx = T_fixture_context();
+
+  RtemsConfigUnitConfig_Action_0( ctx );
+}
+
+/** @} */
-- 
2.35.3