feat: add a histrical wit-bindgen

__wasm/wit-bindgen-sample/wit-bindgen/crates/gen-js/tests/codegen.rs

@@ -0,0 +1,38 @@
+use std::path::Path;
+use std::process::Command;
+
+mod exports {
+    test_helpers::codegen_js_export!(
+        // ...
+        "*.wit"
+    );
+}
+
+mod imports {
+    test_helpers::codegen_js_import!(
+        "*.wit"
+
+        // This uses buffers, which we don't support in imports just yet
+        // TODO: should support this
+        "!wasi-next.wit"
+        "!host.wit"
+    );
+}
+
+fn verify(dir: &str, name: &str) {
+    let (cmd, args) = if cfg!(windows) {
+        ("cmd.exe", &["/c", "npx.cmd"] as &[&str])
+    } else {
+        ("npx", &[] as &[&str])
+    };
+
+    let status = Command::new(cmd)
+        .args(args)
+        .arg("eslint")
+        .arg("-c")
+        .arg(".eslintrc.js")
+        .arg(Path::new(dir).join(&format!("{}.js", name)))
+        .status()
+        .unwrap();
+    assert!(status.success());
+}