- added basic nodefs r/w test

2 files changed, 53 insertions, 0 deletions

diff --git a/tests/fs/test_nodefs_rw.c b/tests/fs/test_nodefs_rw.c
new file mode 100644
index 00000000..140da332
--- /dev/null
+++ b/tests/fs/test_nodefs_rw.c
@@ -0,0 +1,49 @@
+#include <assert.h>
+#include <stdio.h>
+#include <emscripten.h>
+
+int main() {
+  FILE *file;
+  int res;
+  char buffer[512];
+
+  // write something locally with node
+  EM_ASM(
+    var fs = require('fs');
+    fs.writeFileSync('foobar.txt', 'yeehaw');
+  );
+
+  // mount the current folder as a NODEFS instance
+  // inside of emscripten
+  EM_ASM(
+    FS.mkdir('/working');
+    FS.mount(NODEFS, { root: '.' }, '/working');
+  );
+
+  // read and validate the contents of the file
+  file = fopen("/working/foobar.txt", "r");
+  assert(file);
+  res = fread(buffer, sizeof(char), 6, file);
+  assert(res == 6);
+  fclose(file);
+
+  assert(!strcmp(buffer, "yeehaw"));
+
+  // write out something new
+  file = fopen("/working/foobar.txt", "w");
+  assert(file);
+  res = fwrite("cheez", sizeof(char), 5, file);
+  assert(res == 5);
+  fclose(file);
+
+  // validate the changes were persisted to the underlying fs
+  EM_ASM(
+    var fs = require('fs');
+    var contents = fs.readFileSync('foobar.txt', { encoding: 'utf8' });
+    assert(contents === 'cheez');
+  );
+
+  puts("success");
+
+  return 0;
+}
diff --git a/tests/test_core.py b/tests/test_core.py
index e78fb513..f41d59ab 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -7742,6 +7742,10 @@ def process(filename):
     finally:
       Settings.INCLUDE_FULL_LIBRARY = 0
 
+  def test_fs_nodefs_rw(self):
+    src = open(path_from_root('tests', 'fs', 'test_nodefs_rw.c'), 'r').read()
+    self.do_run(src, 'success', force_c=True)
+
   def test_unistd_access(self):
     if Settings.ASM_JS: Settings.ASM_JS = 2 # skip validation, asm does not support random code
     if not self.is_le32(): return self.skip('le32 needed for inline js')