test(std/wasi): add read, write and metadata tests (#6494)

std/wasi/snapshot_preview1_test.ts

@@ -72,6 +72,9 @@ if (import.meta.main) {
       const prelude = await Deno.readTextFile(path.resolve(outdir, basename));
       const options = JSON.parse(prelude);
 
+      await Deno.mkdir(`${testdir}/scratch`);
+
+      try {
         const process = await Deno.run({
           cwd: testdir,
           cmd: [
@@ -116,10 +119,21 @@ if (import.meta.main) {
 
         process.stderr.close();
 
+        if (options.files) {
+          for (const [key, value] of Object.entries(options.files)) {
+            assertEquals(value, await Deno.readTextFile(`${testdir}/${key}`));
+          }
+        }
+
         const status = await process.status();
         assertEquals(status.code, options.exitCode ? +options.exitCode : 0);
 
         process.close();
+      } catch (err) {
+        throw err;
+      } finally {
+        await Deno.remove(`${testdir}/scratch`, { recursive: true });
+      }
     });
   }
 }

std/wasi/testdata/fixture/directory/file

@@ -0,0 +1 @@
+directory/file

std/wasi/testdata/fixture/directory/symlink_to_file

@@ -0,0 +1 @@
+file

std/wasi/testdata/fixture/file

@@ -0,0 +1 @@
+file

std/wasi/testdata/fixture/symlink_to_directory

@@ -0,0 +1 @@
+directory

std/wasi/testdata/fixture/symlink_to_file

@@ -0,0 +1 @@
+file

std/wasi/testdata/std_fs_metadata.rs

@@ -0,0 +1,28 @@
+// { "preopens": { "/fixture": "fixture" } }
+
+fn main() {
+  let metadata = std::fs::metadata("/fixture/directory").unwrap();
+  assert!(metadata.is_dir());
+  assert!(metadata.len() > 0);
+
+  let metadata = std::fs::metadata("/fixture/symlink_to_directory").unwrap();
+  assert!(metadata.is_dir());
+  assert!(metadata.len() > 0);
+
+  let metadata = std::fs::metadata("/fixture/file").unwrap();
+  assert!(metadata.is_file());
+  assert!(metadata.len() > 0);
+
+  let metadata = std::fs::metadata("/fixture/symlink_to_file").unwrap();
+  assert!(metadata.is_file());
+  assert!(metadata.len() > 0);
+
+  let metadata = std::fs::metadata("/fixture/directory/file").unwrap();
+  assert!(metadata.is_file());
+  assert!(metadata.len() > 0);
+
+  let metadata =
+    std::fs::metadata("/fixture/directory/symlink_to_file").unwrap();
+  assert!(metadata.is_file());
+  assert!(metadata.len() > 0);
+}

std/wasi/testdata/std_fs_read.rs

@@ -0,0 +1,17 @@
+// { "preopens": { "/fixture": "fixture" } }
+
+fn main() {
+  assert_eq!(std::fs::read("/fixture/file").unwrap(), b"file\n");
+  assert_eq!(
+    std::fs::read("/fixture/symlink_to_file").unwrap(),
+    b"file\n"
+  );
+  assert_eq!(
+    std::fs::read("/fixture/directory/file").unwrap(),
+    b"directory/file\n"
+  );
+  assert_eq!(
+    std::fs::read("/fixture/directory/symlink_to_file").unwrap(),
+    b"directory/file\n"
+  );
+}

std/wasi/testdata/std_fs_write.rs

@@ -0,0 +1,5 @@
+// { "preopens": { "/scratch": "scratch" }, "files": { "scratch/file": "file" } }
+
+fn main() {
+  assert!(std::fs::write("/scratch/file", b"file").is_ok())
+}