bd: Adopted the block storage api in the FATFileSystem

Author: geky

features/TESTS/filesystem/fat_file_system/main.cpp

@@ -0,0 +1,80 @@
+#include "mbed.h"
+#include "greentea-client/test_env.h"
+#include "unity.h"
+#include "utest.h"
+
+#include "HeapBlockDevice.h"
+#include "FATFileSystem.h"
+#include <stdlib.h>
+
+using namespace utest::v1;
+
+// Test block device
+#define BLOCK_SIZE 512
+HeapBlockDevice bd(128*BLOCK_SIZE, BLOCK_SIZE);
+
+
+void test_format() {
+    int err = FATFileSystem::format(&bd);
+    TEST_ASSERT_EQUAL(0, err);
+}
+
+template <ssize_t TEST_SIZE>
+void test_read_write() {
+    FATFileSystem fs("fat");
+
+    int err = fs.mount(&bd);
+    TEST_ASSERT_EQUAL(0, err);
+
+    uint8_t *buffer = (uint8_t *)malloc(TEST_SIZE);
+    TEST_ASSERT(buffer);
+    
+    // Fill with random sequence
+    srand(1);
+    for (int i = 0; i < TEST_SIZE; i++) {
+        buffer[i] = 0xff & rand();
+    }
+
+    // write and read file
+    FileHandle *file = fs.open("test_read_write.dat", O_WRONLY | O_CREAT);
+    TEST_ASSERT(file);
+    ssize_t size = file->write(buffer, TEST_SIZE);
+    TEST_ASSERT_EQUAL(TEST_SIZE, size);
+    err = file->close();
+    TEST_ASSERT_EQUAL(0, err);
+
+    file = fs.open("test_read_write.dat", O_RDONLY);
+    TEST_ASSERT(file);
+    size = file->read(buffer, TEST_SIZE);
+    TEST_ASSERT_EQUAL(TEST_SIZE, size);
+    err = file->close();
+    TEST_ASSERT_EQUAL(0, err);
+
+    // Check that the data was unmodified
+    srand(1);
+    for (int i = 0; i < TEST_SIZE; i++) {
+        TEST_ASSERT_EQUAL(0xff & rand(), buffer[i]);
+    }
+
+    err = fs.unmount();
+    TEST_ASSERT_EQUAL(0, err);
+}
+
+
+// Test setup
+utest::v1::status_t test_setup(const size_t number_of_cases) {
+    GREENTEA_SETUP(10, "default_auto");
+    return verbose_test_setup_handler(number_of_cases);
+}
+
+Case cases[] = {
+    Case("Testing formating", test_format),
+    Case("Testing read write < block", test_read_write<BLOCK_SIZE/2>),
+    Case("Testing read write > block", test_read_write<2*BLOCK_SIZE>),
+};
+
+Specification specification(test_setup, cases);
+
+int main() {
+    return !Harness::run(specification);
+}