Add a basic test for opendir, readdir, and closedir. (#266)

Author: sunfishcode

tests/general/opendir.c

@@ -0,0 +1,72 @@
+#include <fcntl.h>
+#include <string.h>
+#include <stdbool.h>
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <dirent.h>
+#include <errno.h>
+#include <limits.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#define perror_and_exit(message) \
+  do {                           \
+    perror(message);             \
+    return EXIT_FAILURE;         \
+  } while (0)
+
+#define OFFSET 10726
+#define LENGTH 143
+
+int main(int argc, char *argv[]) {
+  if (argc != 2) {
+    fprintf(stderr, "usage: %s <dir>\n", argv[0]);
+    return EXIT_FAILURE;
+  }
+  DIR *dir = opendir(argv[1]);
+  if (dir == NULL) {
+    perror_and_exit("opendir");
+  }
+
+  int count = 0;
+  int zeros = 0;
+  errno = 0;
+  for (;; count += 1) {
+    struct dirent *ent = readdir(dir);
+    if (ent == NULL) {
+      if (errno == 0) {
+        break;
+      }
+      perror_and_exit("readdir");
+    }
+
+    if (strcmp(ent->d_name, "file.md") == 0) {
+      assert(ent->d_type == DT_REG);
+    } else if (strcmp(ent->d_name, "dir") == 0) {
+      assert(ent->d_type == DT_DIR);
+    } else if (strcmp(ent->d_name, "file-symlink") == 0) {
+      assert(ent->d_type == DT_LNK);
+    } else if (strcmp(ent->d_name, "dir-symlink") == 0) {
+      assert(ent->d_type == DT_LNK);
+    } else if (strcmp(ent->d_name, ".") == 0) {
+      assert(ent->d_type == DT_DIR);
+    } else if (strcmp(ent->d_name, "..") == 0) {
+      assert(ent->d_type == DT_DIR);
+    } else {
+      assert(false);
+    }
+    if (ent->d_ino == 0) {
+      zeros += 1;
+    }
+  }
+
+  assert(count == 6);
+  assert(zeros <= 1);
+
+  if (closedir(dir) != 0)
+    perror_and_exit("closedir");
+
+  return EXIT_SUCCESS;
+}

tests/general/opendir.c.dir/dir-symlink

@@ -0,0 +1 @@
+dir

tests/general/opendir.c.dir/dir/file.txt

@@ -0,0 +1 @@
+This is a file in a directory.

tests/general/opendir.c.dir/file-symlink

@@ -0,0 +1 @@
+file.md

tests/general/opendir.c.dir/file.md

@@ -0,0 +1 @@
+# This is a top-level file

tests/run.sh

@@ -10,7 +10,7 @@ set -ueo pipefail
 # location.  Alternatively, exporting $CC and $CXX allow more flexibility. e.g:
 #
 #  export CXX="<wasi-sdk>/bin/clang++ --sysroot <wasi-sdk>/share/wasi-sysroot"
-#  export CCC="<wasi-sdk>/bin/clang --sysroot <wasi-sdk>/share/wasi-sysroot"
+#  export CC="<wasi-sdk>/bin/clang --sysroot <wasi-sdk>/share/wasi-sysroot"
 #
 
 # Determine the wasm runtime to use, if one is provided.