From 9f351136adde11a891664063c071a25235d74c5d Mon Sep 17 00:00:00 2001
From: Alberto Ricart <alberto@synadia.com>
Date: Mon, 10 May 2021 14:30:21 -0500
Subject: [PATCH] changed to a simple switch

---
 nats-base-client/jsutil.ts | 29 ++++++++++++++++++++++++++---
 tests/jsm_test.ts          | 36 ++++++++++++++++++++++--------------
 2 files changed, 48 insertions(+), 17 deletions(-)

diff --git a/nats-base-client/jsutil.ts b/nats-base-client/jsutil.ts
index 9b2081b8..89caefcc 100644
--- a/nats-base-client/jsutil.ts
+++ b/nats-base-client/jsutil.ts
@@ -30,15 +30,38 @@ export function validateStreamName(name?: string) {
   return validateName("stream", name);
 }
 
+function badChar(s: string): string {
+  switch (s) {
+    case ".":
+      return "dot (.)";
+    case "*":
+      return "asterisk (*)";
+    case ">":
+      return "greater than (>)";
+    case "\r":
+      return "carriage return (␍)";
+    case "\n":
+      return "line feed (␊)";
+    case "\t":
+      return "tab (␉)";
+    case "\f":
+      return "form feed (␌)";
+    default:
+      return "unknown";
+  }
+}
+
 export function validateName(context: string, name = "") {
   if (name === "") {
     throw Error(`${context} name required`);
   }
-  const bad = [".", "*", ">"];
+  const bad = [".", "*", ">", "\r", "\n", "\t", "\f"];
   bad.forEach((v) => {
-    if (name.indexOf(v) !== -1) {
+    const idx = name.indexOf(v);
+    if (idx !== -1) {
+      const rep = badChar(v);
       throw Error(
-        `invalid ${context} name - ${context} name cannot contain '${v}'`,
+        `invalid ${context} name - ${context} name cannot contain '${rep}'`,
       );
     }
   });
diff --git a/tests/jsm_test.ts b/tests/jsm_test.ts
index c694619b..c3789f9b 100644
--- a/tests/jsm_test.ts
+++ b/tests/jsm_test.ts
@@ -41,7 +41,10 @@ import {
 } from "./jstest_util.ts";
 import { connect } from "../src/mod.ts";
 import { assertThrowsAsyncErrorCode } from "./helpers/mod.ts";
-import { validateName } from "../nats-base-client/jsutil.ts";
+import {
+  validateName,
+  validateStreamName,
+} from "../nats-base-client/jsutil.ts";
 
 const StreamNameRequired = "stream name required";
 const ConsumerNameRequired = "durable name required";
@@ -536,19 +539,23 @@ Deno.test("jsm - advisories", async () => {
 });
 
 Deno.test("jsm - validate name", () => {
-  type t = [string, boolean];
+  type t = [string, boolean, string];
   const tests: t[] = [
-    ["", false],
-    [".", false],
-    ["*", false],
-    [">", false],
-    ["hello.", false],
-    ["hello.*", false],
-    ["hello.>", false],
-    ["one.two", false],
-    ["one*two", false],
-    ["one>two", false],
-    ["stream", true],
+    ["", false, "name required"],
+    [".", false, "dot"],
+    ["*", false, "asterisk"],
+    [">", false, "greater than"],
+    ["hello\n", false, "line feed"],
+    ["hello\r", false, "carriage return"],
+    ["he\tllo", false, "tab"],
+    ["he\fllo", false, "form feed"],
+    ["hello.", false, "dot"],
+    ["hello*", false, "asterisk"],
+    ["hello>", false, "greater than"],
+    ["one.two", false, "dot"],
+    ["one*two", false, "asterisk"],
+    ["one>two", false, "greater than"],
+    ["stream", true, ""],
   ];
 
   tests.forEach((v, idx) => {
@@ -557,10 +564,11 @@ Deno.test("jsm - validate name", () => {
       if (!v[1]) {
         fail(`${v[0]} should have been rejected`);
       }
-    } catch (_err) {
+    } catch (err) {
       if (v[1]) {
         fail(`${v[0]} should have been valid`);
       }
+      assert(err.message.includes(v[2]));
     }
   });
 });