2 files changed, 97 insertions, 0 deletions
diff --git a/tests/fs/test_idbfs_sync.c b/tests/fs/test_idbfs_sync.c
new file mode 100644
index 00000000..ff356416
--- /dev/null
+++ b/tests/fs/test_idbfs_sync.c
@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <emscripten.h>
+
+#define EM_ASM_REEXPAND(x) EM_ASM(x)
+
+void success() {
+  int result = 1;
+  REPORT_RESULT();
+}
+
+int main() {
+  EM_ASM(
+    FS.mkdir('/working');
+    FS.mount(IDBFS, {}, '/working');
+  );
+
+#if FIRST
+  // store local files to backing IDB
+  EM_ASM_REEXPAND(
+    FS.writeFile('/working/waka.txt', 'az');
+    FS.writeFile('/working/moar.txt', SECRET);
+    FS.syncfs(function (err) {
+      assert(!err);
+
+      ccall('success', 'v', '', []);
+    });
+  );
+#else
+  // load files from backing IDB
+  EM_ASM_REEXPAND(
+    FS.syncfs(true, function (err) {
+      assert(!err);
+
+      var contents = FS.readFile('/working/waka.txt', { encoding: 'utf8' });
+      assert(contents === 'az');
+
+      var secret = FS.readFile('/working/moar.txt', { encoding: 'utf8' });
+      assert(secret === SECRET);
+
+      ccall('success', 'v', '', []);
+    });
+  );
+#endif
+
+  emscripten_exit_with_live_runtime();
+
+  return 0;
+}
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;
+}