From 4adc61baeba93bc08749c7586d0a36bee01ece8d Mon Sep 17 00:00:00 2001
From: Daniel Walter <dwalter@sigma-star.at>
Date: Wed, 31 Aug 2016 10:10:55 +0200
Subject: Add unit test helpers

Signed-off-by: Daniel Walter <dwalter@sigma-star.at>
---
 tests/unittests/test_lib.h | 151 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 151 insertions(+)
 create mode 100644 tests/unittests/test_lib.h

diff --git a/tests/unittests/test_lib.h b/tests/unittests/test_lib.h
new file mode 100644
index 0000000..122672b
--- /dev/null
+++ b/tests/unittests/test_lib.h
@@ -0,0 +1,151 @@
+#include <stdarg.h>
+#include <setjmp.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <cmocka.h>
+
+int __real_open(const char*, mode_t);
+int __real_close(int);
+int __real_stat(const char*, struct stat *);
+ssize_t __real_read(int, void*, size_t);
+
+/* syscalls to mock */
+int __wrap_open(const char *path, mode_t mode)
+{
+	check_expected(path);
+	mode_t m = mock_type(mode_t);
+	mode_t a = mode & m;
+	assert_int_equal(a, m);
+	int retval = mock_type(int);
+	/* fake open if retval > 0 */
+	if (retval > 0)
+		return retval;
+
+	return __real_open(path, mode);
+}
+
+int __wrap_close(int fd)
+{
+	check_expected(fd);
+	int retval = mock_type(int);
+	if (retval != 0)
+		return __real_close(fd);
+	return retval;
+}
+
+int __wrap_ioctl(int fd, int req, ...)
+{
+	assert_true(fd > 0);
+	check_expected(req);
+	int retval = mock_type(int);
+	void *expected_arg = mock_type(void*);
+	size_t expected_len = mock_type(size_t);
+	if (expected_arg == NULL)
+		return retval;
+	va_list ap;
+	va_start(ap, req);
+	void *arg = va_arg(ap, void *);
+	va_end(ap);
+	assert_non_null(arg);
+	assert_memory_equal(expected_arg, arg, expected_len);
+	return retval;
+}
+
+int __wrap_stat(const char *path, struct stat *buf)
+{
+	check_expected(path);
+	assert_non_null(buf);
+	return mock_type(int);
+}
+
+int __wrap_read(int fd, char *buf, size_t len)
+{
+	assert_true(fd > 0);
+	assert_non_null(buf);
+	check_expected(len);
+	int retval = mock_type(int);
+	int real = mock_type(int);
+	if (real)
+		return __real_read(fd, buf, len);
+	return retval;
+}
+
+int __wrap_write(int fd, char *buf, size_t len)
+{
+	assert_true(fd > 0);
+	assert_non_null(buf);
+	void *expected_buf = mock_type(void*);
+	size_t expected_len = mock_type(size_t);
+	assert_int_equal(expected_len, len);
+	assert_memory_equal(expected_buf, buf, expected_len);
+	return mock_type(int);
+}
+
+off_t __wrap_lseek(int fd, off_t seek, int whence)
+{
+	assert_true(fd > 0);
+	check_expected(seek);
+	check_expected(whence);
+	return mock_type(off_t);
+}
+
+#define expect_open(X,Y,Z) do { \
+		expect_string(__wrap_open, path, X);\
+		will_return(__wrap_open, Y);\
+		will_return(__wrap_open, Z);\
+	} while(0);
+
+#define expect_close(X,Y) do { \
+		expect_value(__wrap_close, fd, X);\
+		will_return(__wrap_close, Y);\
+	} while(0);
+
+#define expect_ioctl(W,X,Y,Z) do { \
+		expect_value(__wrap_ioctl, req, (int)W);\
+		will_return(__wrap_ioctl, X);\
+		will_return(__wrap_ioctl, Y);\
+		will_return(__wrap_ioctl, Z);\
+	} while(0);
+
+#define expect_ioctl_short(X,Y) do { \
+		expect_value(__wrap_ioctl, req, (int)X);\
+		will_return(__wrap_ioctl, Y);\
+		will_return(__wrap_ioctl, NULL);\
+		will_return(__wrap_ioctl, 0);\
+	} while(0);
+
+#define expect_stat(X,Y) do { \
+		expect_string(__wrap_stat, path, X);\
+		will_return(__wrap_stat, Y);\
+	} while(0);
+
+#define expect_write(X,Y,Z) do { \
+		will_return(__wrap_write, X);\
+		will_return(__wrap_write, Y);\
+		will_return(__wrap_write, Z);\
+	} while(0);
+
+#define expect_lseek(X,Y,Z) do { \
+		expect_value(__wrap_lseek, seek, X);\
+		expect_value(__wrap_lseek, whence, Y);\
+		will_return(__wrap_lseek, Z);\
+	} while(0);
+
+#define expect_read(X,Y) do { \
+		expect_value(__wrap_read, len, X);\
+		will_return(__wrap_read, Y);\
+		will_return(__wrap_read, 0);\
+	} while(0);
+
+#define expect_read_real(X,Y) do { \
+		expect_value(__wrap_read, len, X);\
+		will_return(__wrap_read, Y);\
+		will_return(__wrap_read, 1);\
+	} while(0);
-- 
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