Fixes #321 - append unicode flag to regex patterns (#322)

* Fixes #321 - append unicode flag to regex patterns

* chore: adding changeset

* Fixing other failing tests

Author: pauljamescleary

.changeset/fix-unicode-escape-classes.md

@@ -0,0 +1,5 @@
+---
+"openapi-zod-client": patch
+---
+
+Append unicode flag for schema regular expression patterns when the pattern includes common unicode escape classes

lib/src/openApiToZod.ts

@@ -372,7 +372,7 @@ const formatPatternIfNeeded = (pattern: string) => {
 
     pattern = escapeControlCharacters(pattern);
 
-    return `/${pattern}/`;
+    return pattern.includes("\\u") || pattern.includes("\\p") ? `/${pattern}/u` : `/${pattern}/`;
 };
 
 const getZodChainableStringValidations = (schema: SchemaObject) => {

lib/tests/invalid-pattern-regex.test.ts

@@ -26,6 +26,6 @@ test("invalid-pattern-regex", () => {
     expect(
         getZodSchema({ schema: controlCharacters }) + getZodChain({ schema: controlCharacters })
     ).toMatchInlineSnapshot(
-        '"z.string().regex(/[\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\t\\n\\x0b\\x0c\\r\\x0e\\x0f\\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17\\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f\\x7f\\x80\\x81\\x82\\x83\\x84\\x85\\x86\\x87\\x88\\x89\\x8a\\x8b\\x8c\\x8d\\x8e\\x8f\\x90\\x91\\x92\\x93\\x94\\x95\\x96\\x97\\x98\\x99\\x9a\\x9b\\x9c\\x9d\\x9e\\x9f\\ufffe\\uffff]+/).optional()"'
+        '"z.string().regex(/[\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\t\\n\\x0b\\x0c\\r\\x0e\\x0f\\x10\\x11\\x12\\x13\\x14\\x15\\x16\\x17\\x18\\x19\\x1a\\x1b\\x1c\\x1d\\x1e\\x1f\\x7f\\x80\\x81\\x82\\x83\\x84\\x85\\x86\\x87\\x88\\x89\\x8a\\x8b\\x8c\\x8d\\x8e\\x8f\\x90\\x91\\x92\\x93\\x94\\x95\\x96\\x97\\x98\\x99\\x9a\\x9b\\x9c\\x9d\\x9e\\x9f\\ufffe\\uffff]+/u).optional()"'
     );
 });

lib/tests/unicode-pattern-regex.test.ts

@@ -0,0 +1,35 @@
+import { getZodSchema } from "../src";
+import { expect, test } from "vitest";
+import { getZodChain } from "../src/openApiToZod";
+import { SchemaObject } from "openapi3-ts";
+
+test("unicode-pattern-regex", () => {
+    const schema: SchemaObject = {
+        type: "string",
+        pattern: "\\p{L}+",
+    };
+    const schemaWithSlashes: SchemaObject = {
+        type: "string",
+        pattern: "/\\p{L}+/",
+    };
+    const schemaWithComplexUnicodePattern: SchemaObject = {
+        type: "string",
+        pattern: "$|^[\\p{L}\\d]+[\\p{L}\\d\\s.&()\\*'',-;#]*|$",
+    };
+    const schemaWithSlashU: SchemaObject = {
+        type: "string",
+        pattern: "\\u{1F600}+",
+    }
+    expect(getZodSchema({ schema: schema }) + getZodChain({ schema })).toMatchInlineSnapshot(
+        '"z.string().regex(/\\p{L}+/u).optional()"'
+    );
+    expect(getZodSchema({ schema: schemaWithSlashes }) + getZodChain({ schema: schemaWithSlashes })).toMatchInlineSnapshot(
+        '"z.string().regex(/\\p{L}+/u).optional()"'
+    );
+    expect(getZodSchema({ schema: schemaWithComplexUnicodePattern }) + getZodChain({ schema: schemaWithComplexUnicodePattern })).toMatchInlineSnapshot(
+        '"z.string().regex(/$|^[\\p{L}\\d]+[\\p{L}\\d\\s.&()\\*\'\',-;#]*|$/u).optional()"'
+    );
+    expect(getZodSchema({ schema: schemaWithSlashU }) + getZodChain({ schema: schemaWithSlashU })).toMatchInlineSnapshot(
+        '"z.string().regex(/\\u{1F600}+/u).optional()"'
+    );
+});