Add module tests for TDBStore

Also add option for developer to use broken disk-image
on TDBStore module tests. This disk-image was used for verifying
IOTSTOR-978 bug.

Author: Seppo Takalo

UNITTESTS/moduletests/storage/kvstore/TDBStore/broken_image.img

@@ -0,0 +1,98 @@
+/* Copyright (c) 2019 ARM Limited
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "gtest/gtest.h"
+#include "features/storage/blockdevice/HeapBlockDevice.h"
+#include "features/storage/blockdevice/FlashSimBlockDevice.h"
+#include "features/storage/kvstore/tdbstore/TDBStore.h"
+#include <stdlib.h>
+#include "stubs/EmulatedSD.h"
+
+#define BLOCK_SIZE (512)
+#define DEVICE_SIZE (BLOCK_SIZE*20)
+
+using namespace mbed;
+// For testing purposes, block device should keep its data between test runs
+// to ensure that we can cope with dirty-images
+HeapBlockDevice sd{DEVICE_SIZE};
+
+// For debugging purpose, we could use file to store the BlockDevice content
+//EmulatedSD sd{"../UNITTESTS/moduletests/storage/kvstore/TDBStore/broken_image.img"};
+
+class TDBStoreModuleTest : public testing::Test {
+protected:
+    FlashSimBlockDevice flash{&sd};
+    TDBStore tdb{&flash};
+
+    virtual void SetUp()
+    {
+        EXPECT_EQ(tdb.init(), MBED_SUCCESS);
+        EXPECT_EQ(tdb.reset(), MBED_SUCCESS);
+    }
+
+    virtual void TearDown()
+    {
+        EXPECT_EQ(tdb.deinit(), MBED_SUCCESS);
+    }
+};
+
+TEST_F(TDBStoreModuleTest, init)
+{
+    EXPECT_EQ(tdb.deinit(), MBED_SUCCESS);
+    EXPECT_EQ(tdb.init(), MBED_SUCCESS);
+    EXPECT_EQ(tdb.init(), MBED_SUCCESS);
+}
+
+TEST_F(TDBStoreModuleTest, set_get)
+{
+    char buf[100];
+    size_t size;
+    EXPECT_EQ(tdb.set("key", "data", 5, 0), MBED_SUCCESS);
+    EXPECT_EQ(tdb.get("key", buf, 100, &size), MBED_SUCCESS);
+    EXPECT_EQ(size, 5);
+    EXPECT_STREQ("data", buf);
+}
+
+TEST_F(TDBStoreModuleTest, reset)
+{
+    char buf[100];
+    size_t size, read;
+    // Write so much, that we are sure that garbage collection have kicked up
+    for (int i = 0; i < 100; ++i) {
+        size = sprintf(buf, "data%d", i);
+        EXPECT_EQ(tdb.set("key", buf, size, 0), MBED_SUCCESS);
+    }
+    EXPECT_EQ(tdb.reset(), MBED_SUCCESS);
+    EXPECT_EQ(tdb.deinit(), MBED_SUCCESS);
+    EXPECT_EQ(tdb.init(), MBED_SUCCESS);
+    // After reset->deinit()->init() there should be no data
+    EXPECT_NE(tdb.get("key", buf, 100, &read), MBED_SUCCESS);
+}
+
+TEST_F(TDBStoreModuleTest, set_deinit_init_get)
+{
+    char buf[100];
+    size_t size;
+    for (int i = 0; i < 10; ++i) {
+        EXPECT_EQ(tdb.set("key", "data", 5, 0), MBED_SUCCESS);
+        EXPECT_EQ(tdb.deinit(), MBED_SUCCESS);
+        EXPECT_EQ(tdb.init(), MBED_SUCCESS);
+        EXPECT_EQ(tdb.get("key", buf, 100, &size), MBED_SUCCESS);
+        EXPECT_EQ(size, 5);
+        EXPECT_STREQ("data", buf);
+        EXPECT_EQ(tdb.remove("key"), MBED_SUCCESS);
+    }
+}

UNITTESTS/moduletests/storage/kvstore/TDBStore/moduletest.cpp

@@ -0,0 +1,28 @@
+
+####################
+# UNIT TESTS
+####################
+
+set(unittest-includes ${unittest-includes}
+  .
+  ..
+  ../features/frameworks/mbed-trace/mbed-trace
+)
+
+set(unittest-sources
+  ../features/storage/blockdevice/FlashSimBlockDevice.cpp
+  ../features/storage/blockdevice/HeapBlockDevice.cpp
+  ../features/storage/blockdevice/BufferedBlockDevice.cpp
+  ../features/storage/kvstore/tdbstore/TDBStore.cpp
+  ../features/frameworks/mbed-trace/source/mbed_trace.c
+  stubs/mbed_atomic_stub.c
+  stubs/mbed_assert_stub.c
+  stubs/mbed_error.c
+  stubs/EmulatedSD.cpp
+)
+
+set(unittest-test-sources
+  moduletests/storage/kvstore/TDBStore/moduletest.cpp
+)
+
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DBYPASS_NVSTORE_CHECK")