infra(unicorn): prefer-code-point (#2509)

4 files changed, 18 insertions, 14 deletions

diff --git a/src/modules/finance/iban.ts b/src/modules/finance/iban.ts
index 8b3f78c4..d639404c 100644
--- a/src/modules/finance/iban.ts
+++ b/src/modules/finance/iban.ts
@@ -1408,7 +1408,7 @@ const iban: Iban = {
   pattern100: ['001', '002', '003', '004', '005', '006', '007', '008', '009'],
   toDigitString: (str) =>
     str.replace(/[A-Z]/gi, (match) =>
-      String(match.toUpperCase().charCodeAt(0) - 55)
+      String((match.toUpperCase().codePointAt(0) ?? Number.NaN) - 55)
     ),
 };
 
diff --git a/src/modules/helpers/index.ts b/src/modules/helpers/index.ts
index 3f121a41..aaf0e231 100644
--- a/src/modules/helpers/index.ts
+++ b/src/modules/helpers/index.ts
@@ -458,7 +458,9 @@ export class SimpleHelpersModule extends SimpleModuleBase {
       while (range != null) {
         if (range[0].includes('-')) {
           // handle ranges
-          const rangeMinMax = range[0].split('-').map((x) => x.charCodeAt(0));
+          const rangeMinMax = range[0]
+            .split('-')
+            .map((x) => x.codePointAt(0) ?? Number.NaN);
           min = rangeMinMax[0];
           max = rangeMinMax[1];
           // throw error if min larger than max
@@ -469,12 +471,12 @@ export class SimpleHelpersModule extends SimpleModuleBase {
           for (let i = min; i <= max; i++) {
             if (
               isCaseInsensitive &&
-              Number.isNaN(Number(String.fromCharCode(i)))
+              Number.isNaN(Number(String.fromCodePoint(i)))
             ) {
-              const ch = String.fromCharCode(i);
+              const ch = String.fromCodePoint(i);
               rangeCodes.push(
-                ch.toUpperCase().charCodeAt(0),
-                ch.toLowerCase().charCodeAt(0)
+                ch.toUpperCase().codePointAt(0) ?? Number.NaN,
+                ch.toLowerCase().codePointAt(0) ?? Number.NaN
               );
             } else {
               rangeCodes.push(i);
@@ -484,11 +486,11 @@ export class SimpleHelpersModule extends SimpleModuleBase {
           // handle non-ranges
           if (isCaseInsensitive && Number.isNaN(Number(range[0]))) {
             rangeCodes.push(
-              range[0].toUpperCase().charCodeAt(0),
-              range[0].toLowerCase().charCodeAt(0)
+              range[0].toUpperCase().codePointAt(0) ?? Number.NaN,
+              range[0].toLowerCase().codePointAt(0) ?? Number.NaN
             );
           } else {
-            rangeCodes.push(range[0].charCodeAt(0));
+            rangeCodes.push(range[0].codePointAt(0) ?? Number.NaN);
           }
         }
 
@@ -540,7 +542,7 @@ export class SimpleHelpersModule extends SimpleModuleBase {
       }
 
       const generatedString = this.multiple(
-        () => String.fromCharCode(this.arrayElement(rangeCodes)),
+        () => String.fromCodePoint(this.arrayElement(rangeCodes)),
         { count: repetitions }
       ).join('');
 
diff --git a/src/modules/internet/index.ts b/src/modules/internet/index.ts
index 8367825f..395266fb 100644
--- a/src/modules/internet/index.ts
+++ b/src/modules/internet/index.ts
@@ -660,13 +660,15 @@ export class InternetModule extends ModuleBase {
           return charMapping[char];
         }
 
-        if (char.charCodeAt(0) < 0x80) {
+        const charCode = char.codePointAt(0) ?? Number.NaN;
+
+        if (charCode < 0x80) {
           // Keep ASCII characters
           return char;
         }
 
         // Final fallback return the Unicode char code value for Chinese, Japanese, Korean etc, base-36 encoded
-        return char.charCodeAt(0).toString(36);
+        return charCode.toString(36);
       })
       .join('');
     result = result.toString().replace(/'/g, '');
@@ -1495,7 +1497,7 @@ export class InternetModule extends ModuleBase {
       }
 
       const n = this.faker.number.int(94) + 33;
-      let char = String.fromCharCode(n);
+      let char = String.fromCodePoint(n);
       if (memorable) {
         char = char.toLowerCase();
       }
diff --git a/src/modules/string/index.ts b/src/modules/string/index.ts
index 4240a6f1..6428153d 100644
--- a/src/modules/string/index.ts
+++ b/src/modules/string/index.ts
@@ -674,7 +674,7 @@ export class StringModule extends SimpleModuleBase {
     let returnString = '';
 
     while (returnString.length < length) {
-      returnString += String.fromCharCode(
+      returnString += String.fromCodePoint(
         this.faker.number.int(charCodeOption)
       );
     }