Libc: add dirent tests

JIRA: CI-359

libc/dirent/closedir.c

@@ -22,10 +22,12 @@
 #include <dirent.h>
 #include <errno.h>
 #include <sys/types.h>
+#include <sys/stat.h>
 #include <string.h>
 
 #include <unity_fixture.h>
 #include "common.h"
+#include "dirent_helper_functions.h"
 
 #define MAIN_DIR "test_closedir"
 
@@ -36,8 +38,9 @@ TEST_GROUP(dirent_closedir);
 TEST_SETUP(dirent_closedir)
 {
 	errno = 0;
-	TEST_ASSERT_TRUE(mkdir(MAIN_DIR, 0777) != -1 || errno == EEXIST);
-	TEST_ASSERT_TRUE(mkdir(MAIN_DIR "/dir1", 0777) != -1 || errno == EEXIST);
+	TEST_MKDIR_ASSERTED(MAIN_DIR, S_IRWXU);
+	errno = 0;
+	TEST_MKDIR_ASSERTED(MAIN_DIR "/dir1", S_IRUSR);
 }
 
 
@@ -66,8 +69,95 @@ TEST(dirent_closedir, closing_non_empty_dir)
 }
 
 
+TEST(dirent_closedir, preserving_content_after_closedir)
+{
+	char dirNames[7][10];
+	ino_t inodes[7];
+	struct dirent *info;
+	DIR *dp1;
+	int result = 0;
+	errno = 0;
+
+
+	TEST_MKDIR_ASSERTED(MAIN_DIR "/test_preserve", S_IRWXU);
+	TEST_MKDIR_ASSERTED(MAIN_DIR "/test_preserve/B", S_IRUSR);
+	TEST_MKDIR_ASSERTED(MAIN_DIR "/test_preserve/CC", S_IRUSR);
+	TEST_MKDIR_ASSERTED(MAIN_DIR "/test_preserve/DDDD", S_IRUSR);
+	TEST_MKDIR_ASSERTED(MAIN_DIR "/test_preserve/EEEEEE", S_IRUSR);
+
+
+	dp1 = opendir(MAIN_DIR "/test_preserve");
+	TEST_ASSERT_NOT_NULL(dp1);
+
+	/*
+	 *Create an array with names of dirs.
+	 *Indexes will be used to associate name of each directory with a bit
+	 */
+	{
+		int i = 0;
+		while ((info = readdir(dp1)) != NULL) {
+			inodes[i] = info->d_ino;
+			strcpy(dirNames[i++], info->d_name);
+		}
+	}
+
+
+	closedir(dp1);
+	DIR *dp2 = opendir(MAIN_DIR "/test_preserve");
+	TEST_ASSERT_NOT_NULL(dp2);
+	rewinddir(dp2);
+
+	/*
+	 * Map each directory to a bit.
+	 * In case of fail set most left bit to 1.
+	 * Assert every bit is high except the first two.
+	 */
+
+	/* Go through each entry */
+
+	while ((info = readdir(dp2)) != NULL) {
+
+		int found = 0;
+		char name[10];
+		strcpy(name, info->d_name);
+
+		/* determine the index of given name */
+		for (int i = 0; i < 7; ++i) {
+
+			if (!strcmp(name, dirNames[i])) {
+
+				TEST_ASSERT_EQUAL_INT64(inodes[i], info->d_ino);
+
+				/* Set the index bit of found name */
+				result |= 1 << i;
+
+				found = 1;
+			}
+		}
+
+		/* Name found, time to search for another name */
+		if (found)
+			continue;
+
+		TEST_FAIL();
+	}
+
+	/* result variable should be 0b0011 1111, which is 63, or 3f */
+	TEST_ASSERT_EQUAL_INT(0x3f, result);
+
+	closedir(dp2);
+
+	rmdir(MAIN_DIR "/test_preserve/B");
+	rmdir(MAIN_DIR "/test_preserve/CC");
+	rmdir(MAIN_DIR "/test_preserve/DDDD");
+	rmdir(MAIN_DIR "/test_preserve/EEEEEE");
+	rmdir(MAIN_DIR "/test_preserve");
+}
+
+
 TEST_GROUP_RUNNER(dirent_closedir)
 {
 	RUN_TEST_CASE(dirent_closedir, closing_empty_dir);
 	RUN_TEST_CASE(dirent_closedir, closing_non_empty_dir);
+	RUN_TEST_CASE(dirent_closedir, preserving_content_after_closedir);
 }

libc/dirent/dirent_helper_functions.h

@@ -5,16 +5,15 @@
 #include <sys/stat.h>
 #include <string.h>
 
-#define INO_T_TEST_MAX_DIRS 10
 
+#define TEST_MKDIR_ASSERTED(path, mode) TEST_ASSERT_TRUE_MESSAGE(mkdir(path, mode) != -1 || errno == EEXIST, strerror(errno))
 
-void test_mkdir_asserted(char *path, mode_t mode);
+#define TEST_OPENDIR_ASSERTED(path) \
+	({ \
+		DIR *dp = opendir(path); \
+		TEST_ASSERT_NOT_NULL(dp); \
+		dp; \
+	})
 
-int test_create_directories(int num_of_dirs);
 
-int d_ino_in(ino_t arg, ino_t *arr);
-
-DIR *test_opendir_asserted(const char *path);
-
-
-#endif
+#endif