add deno test mode, enabled by WASM_BINDGEN_USE_DENO=1

crates/cli/src/bin/wasm-bindgen-test-runner/deno.rs

@@ -0,0 +1,73 @@
+use std::ffi::OsString;
+use std::fs;
+use std::path::Path;
+use std::process::Command;
+
+use anyhow::{Context, Error};
+
+use crate::node::{exec, SHARED_SETUP};
+
+pub fn execute(
+    module: &str,
+    tmpdir: &Path,
+    args: &[OsString],
+    tests: &[String],
+) -> Result<(), Error> {
+    let mut js_to_execute = format!(
+        r#"import * as wasm from "./{0}.js";
+
+        {console_override}
+
+        // global.__wbg_test_invoke = f => f();
+
+        // Forward runtime arguments. These arguments are also arguments to the
+        // `wasm-bindgen-test-runner` which forwards them to deno which we
+        // forward to the test harness. this is basically only used for test
+        // filters for now.
+        cx.args(Deno.args.slice(1));
+
+        const ok = await cx.run(tests.map(n => wasm.__wasm[n]));
+        if (!ok) Deno.exit(1);
+
+        const tests = [];
+    "#,
+        module,
+        console_override = SHARED_SETUP,
+    );
+
+    for test in tests {
+        js_to_execute.push_str(&format!("tests.push('{}')\n", test));
+    }
+
+    let js_path = tmpdir.join("run.js");
+    fs::write(&js_path, js_to_execute).context("failed to write JS file")?;
+
+    /*
+    // Augment `NODE_PATH` so things like `require("tests/my-custom.js")` work
+    // and Rust code can import from custom JS shims. This is a bit of a hack
+    // and should probably be removed at some point.
+    let path = env::var("NODE_PATH").unwrap_or_default();
+    let mut path = env::split_paths(&path).collect::<Vec<_>>();
+    path.push(env::current_dir().unwrap());
+    path.push(tmpdir.to_path_buf());
+    let extra_node_args = env::var("NODE_ARGS")
+        .unwrap_or_default()
+        .split(",")
+        .map(|s| s.to_string())
+        .filter(|s| !s.is_empty())
+        .collect::<Vec<_>>();
+    exec(
+        Command::new("node")
+            .env("NODE_PATH", env::join_paths(&path).unwrap())
+            .args(&extra_node_args)
+            .arg(&js_path)
+            .args(args),
+    )*/
+    exec(
+        Command::new("deno")
+            .arg("run")
+            .arg("--allow-read")
+            .arg(&js_path)
+            .args(args),
+    )
+}

crates/cli/src/bin/wasm-bindgen-test-runner/main.rs

@@ -22,6 +22,7 @@ use wasm_bindgen_cli_support::Bindgen;
 #[global_allocator]
 static ALLOC: std::alloc::System = std::alloc::System;
 
+mod deno;
 mod headless;
 mod node;
 mod server;
@@ -30,6 +31,7 @@ mod shell;
 #[derive(Debug, Copy, Clone, Eq, PartialEq)]
 enum TestMode {
     Node,
+    Deno,
     Browser,
 }
 
@@ -92,6 +94,7 @@ fn main() -> anyhow::Result<()> {
     let test_mode = match custom_section {
         Some(section) if section.data.contains(&0x01) => TestMode::Browser,
         Some(_) => bail!("invalid __wasm_bingen_test_unstable value"),
+        None if std::env::var("WASM_BINDGEN_USE_DENO").is_ok() => TestMode::Deno,
         None => TestMode::Node,
     };
 
@@ -145,6 +148,7 @@ integration test.\
     let mut b = Bindgen::new();
     match test_mode {
         TestMode::Node => b.nodejs(true)?,
+        TestMode::Deno => b.deno(true)?,
         TestMode::Browser => b.web(true)?,
     };
 
@@ -160,6 +164,7 @@ integration test.\
 
     match test_mode {
         TestMode::Node => node::execute(&module, &tmpdir, &args, &tests)?,
+        TestMode::Deno => deno::execute(&module, &tmpdir, &args, &tests)?,
         TestMode::Browser => {
             let srv = server::spawn(
                 &if headless {

crates/cli/src/bin/wasm-bindgen-test-runner/node.rs

@@ -6,6 +6,38 @@ use std::process::Command;
 
 use anyhow::{Context, Error};
 
+// depends on the variable 'wasm' and initializes te WasmBindgenTestContext cx
+pub const SHARED_SETUP: &str = r#"
+const handlers = {};
+
+const wrap = method => {
+    const og = console[method];
+    const on_method = `on_console_${method}`;
+    console[method] = function (...args) {
+        og.apply(this, args);
+        if (handlers[on_method]) {
+            handlers[on_method](args);
+        }
+    };
+};
+
+// override `console.log` and `console.error` etc... before we import tests to
+// ensure they're bound correctly in wasm. This'll allow us to intercept
+// all these calls and capture the output of tests
+wrap("debug");
+wrap("log");
+wrap("info");
+wrap("warn");
+wrap("error");
+
+cx = new wasm.WasmBindgenTestContext();
+handlers.on_console_debug = wasm.__wbgtest_console_debug;
+handlers.on_console_log = wasm.__wbgtest_console_log;
+handlers.on_console_info = wasm.__wbgtest_console_info;
+handlers.on_console_warn = wasm.__wbgtest_console_warn;
+handlers.on_console_error = wasm.__wbgtest_console_error;
+"#;
+
 pub fn execute(
     module: &str,
     tmpdir: &Path,
@@ -15,41 +47,13 @@ pub fn execute(
     let mut js_to_execute = format!(
         r#"
         const {{ exit }} = require('process');
+        const wasm = require("./{0}");
 
-        const handlers = {{}};
+        {console_override}
-
-        const wrap = method => {{
-            const og = console[method];
-            const on_method = `on_console_${{method}}`;
-            console[method] = function (...args) {{
-                og.apply(this, args);
-                if (handlers[on_method]) {{
-                    handlers[on_method](args);
-                }}
-            }};
-        }};
-
-        // override `console.log` and `console.error` etc... before we import tests to
-        // ensure they're bound correctly in wasm. This'll allow us to intercept
-        // all these calls and capture the output of tests
-        wrap("debug");
-        wrap("log");
-        wrap("info");
-        wrap("warn");
-        wrap("error");
 
         global.__wbg_test_invoke = f => f();
 
         async function main(tests) {{
-            const wasm = require("./{0}");
-
-            cx = new wasm.WasmBindgenTestContext();
-            handlers.on_console_debug = wasm.__wbgtest_console_debug;
-            handlers.on_console_log = wasm.__wbgtest_console_log;
-            handlers.on_console_info = wasm.__wbgtest_console_info;
-            handlers.on_console_warn = wasm.__wbgtest_console_warn;
-            handlers.on_console_error = wasm.__wbgtest_console_error;
-
             // Forward runtime arguments. These arguments are also arguments to the
             // `wasm-bindgen-test-runner` which forwards them to node which we
             // forward to the test harness. this is basically only used for test
@@ -63,7 +67,8 @@ pub fn execute(
 
         const tests = [];
     "#,
-        module
+        module,
+        console_override = SHARED_SETUP,
     );
 
     // Note that we're collecting *JS objects* that represent the functions to
@@ -109,7 +114,7 @@ pub fn execute(
 }
 
 #[cfg(unix)]
-fn exec(cmd: &mut Command) -> Result<(), Error> {
+pub fn exec(cmd: &mut Command) -> Result<(), Error> {
     use std::os::unix::prelude::*;
     Err(Error::from(cmd.exec())
         .context("failed to execute `node`")
@@ -117,7 +122,7 @@ fn exec(cmd: &mut Command) -> Result<(), Error> {
 }
 
 #[cfg(windows)]
-fn exec(cmd: &mut Command) -> Result<(), Error> {
+pub fn exec(cmd: &mut Command) -> Result<(), Error> {
     use std::process;
     let status = cmd.status()?;
     process::exit(status.code().unwrap_or(3));