feat(node:readline): add node:readline and node:readline/promises (#1738)

* feat(readline): WIP: add readline

* test(helpers): add deepStrictEqual helper

* feat(readline): add readline & readline/promises to loader

* fix(node:events): emit newListener on new listener added

* feat(readline): finish readline cb interface, add tests

* fix(stream): fix Transform.end()

* fix(node-test-helpers): correct throws behavior, improve how all asserts work

* feat(readline/promises): add readline/promises

* feat(assert): add assert.match

* test(readline): uncomment more tests

* fix(readline): MaxCeil -> MathCeil 🤦

* fix(readline): export promises from node:readline

* fix(readline): temp fix for circular dependency

* cleanup(readline): remove console.log

* fix(readline): change true -> 0 for CommonJS export

* perf(readline): micro-optimizations with some getters

* perf(readline): lazy load isWritable

* cleanup(readline): rename debug flag env var to BUN_JS_DEBUG

1 files changed, 55 insertions, 0 deletions

diff --git a/test/bun.js/readline_promises.node.test.ts b/test/bun.js/readline_promises.node.test.ts
new file mode 100644
index 000000000..eadd289e3
--- /dev/null
+++ b/test/bun.js/readline_promises.node.test.ts
@@ -0,0 +1,55 @@
+import { describe, it } from "bun:test";
+import readlinePromises from "node:readline/promises";
+import { EventEmitter } from "node:events";
+import {
+  createDoneDotAll,
+  createCallCheckCtx,
+  assert,
+} from "./node-test-helpers";
+
+// ----------------------------------------------------------------------------
+// Helpers
+// ----------------------------------------------------------------------------
+
+class FakeInput extends EventEmitter {
+  output = "";
+  resume() {}
+  pause() {}
+  write(data) {
+    this.output += data;
+  }
+  end() {}
+  reset() {
+    this.output = "";
+  }
+}
+
+// ----------------------------------------------------------------------------
+// Tests
+// ----------------------------------------------------------------------------
+
+describe("readline/promises.createInterface()", () => {
+  it("should throw an error when failed completion", (done) => {
+    const createDone = createDoneDotAll(done);
+    const { mustCall, mustNotCall } = createCallCheckCtx(createDone());
+
+    const fi = new FakeInput();
+    const rli = new readlinePromises.Interface({
+      input: fi,
+      output: fi,
+      terminal: true,
+      completer: mustCall(() => Promise.reject(new Error("message"))),
+    });
+
+    rli.on("line", mustNotCall());
+    fi.emit("data", "\t");
+    const outCheckDone = createDone();
+    process.nextTick(() => {
+      console.log("output", fi.output);
+      assert.match(fi.output, /^Tab completion error/);
+      fi.reset();
+      outCheckDone();
+    });
+    rli.close();
+  });
+});