From db0e08518a7d37b37a31ae6904e2a1d379e4545f Mon Sep 17 00:00:00 2001
From: Jyeu <chen@jyeu.xyz>
Date: Sat, 14 Mar 2026 22:31:35 +0800
Subject: [PATCH] test(operations): add tests for `ToFullwidth` function

---
 tests/operations/index.mjs             |   1 +
 tests/operations/tests/ToFullwidth.mjs | 144 +++++++++++++++++++++++++
 2 files changed, 145 insertions(+)
 create mode 100644 tests/operations/tests/ToFullwidth.mjs

diff --git a/tests/operations/index.mjs b/tests/operations/index.mjs
index fb03a5f71..bd08a7c7e 100644
--- a/tests/operations/index.mjs
+++ b/tests/operations/index.mjs
@@ -167,6 +167,7 @@ import "./tests/TakeNthBytes.mjs";
 import "./tests/Template.mjs";
 import "./tests/TextEncodingBruteForce.mjs";
 import "./tests/TextIntegerConverter.mjs";
+import "./tests/ToFullwidth.mjs";
 import "./tests/ToFromInsensitiveRegex.mjs";
 import "./tests/TranslateDateTimeFormat.mjs";
 import "./tests/Typex.mjs";
diff --git a/tests/operations/tests/ToFullwidth.mjs b/tests/operations/tests/ToFullwidth.mjs
new file mode 100644
index 000000000..0d1c52fd9
--- /dev/null
+++ b/tests/operations/tests/ToFullwidth.mjs
@@ -0,0 +1,144 @@
+/**
+ * To Fullwidth tests.
+ *
+ * @author jyeu [chen@jyeu.xyz]
+ *
+ * @copyright Crown Copyright 2026
+ * @license Apache-2.0
+ */
+import TestRegister from "../../lib/TestRegister.mjs";
+
+TestRegister.addTests([
+    {
+        name: "To Fullwidth: empty string",
+        input: "",
+        expectedOutput: "",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: lowercase letters",
+        input: "admin",
+        expectedOutput: "\uFF41\uFF44\uFF4D\uFF49\uFF4E",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: uppercase letters",
+        input: "ADMIN",
+        expectedOutput: "\uFF21\uFF24\uFF2D\uFF29\uFF2E",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: digits",
+        input: "0123456789",
+        expectedOutput: "\uFF10\uFF11\uFF12\uFF13\uFF14\uFF15\uFF16\uFF17\uFF18\uFF19",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: space becomes ideographic space (U+3000)",
+        input: "hello world",
+        expectedOutput: "\uFF48\uFF45\uFF4C\uFF4C\uFF4F\u3000\uFF57\uFF4F\uFF52\uFF4C\uFF44",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: common punctuation and symbols",
+        input: "!@#$%^&*()_+-=[]{}|;':\",./<>?",
+        expectedOutput: "\uFF01\uFF20\uFF03\uFF04\uFF05\uFF3E\uFF06\uFF0A\uFF08\uFF09\uFF3F\uFF0B\uFF0D\uFF1D\uFF3B\uFF3D\uFF5B\uFF5D\uFF5C\uFF1B\uFF07\uFF1A\uFF02\uFF0C\uFF0E\uFF0F\uFF1C\uFF1E\uFF1F",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: slash for WAF bypass simulation",
+        input: "/admin/secret",
+        expectedOutput: "\uFF0F\uFF41\uFF44\uFF4D\uFF49\uFF4E\uFF0F\uFF53\uFF45\uFF43\uFF52\uFF45\uFF54",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: non-ASCII characters pass through unchanged",
+        input: "你好世界",
+        expectedOutput: "你好世界",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: newline passes through unchanged",
+        input: "line1\nline2",
+        expectedOutput: "\uFF4C\uFF49\uFF4E\uFF45\uFF11\n\uFF4C\uFF49\uFF4E\uFF45\uFF12",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: mixed ASCII and non-ASCII",
+        input: "hello,世界!",
+        expectedOutput: "\uFF48\uFF45\uFF4C\uFF4C\uFF4F\uFF0C世界\uFF01",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: boundary character 0x21 (!)",
+        input: "!",
+        expectedOutput: "\uFF01",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+    {
+        name: "To Fullwidth: boundary character 0x7E (~)",
+        input: "~",
+        expectedOutput: "\uFF5E",
+        recipeConfig: [
+            {
+                op: "To Fullwidth",
+                args: [],
+            },
+        ],
+    },
+]);