Add toStringSigned to Strings.sol (#4330)

Co-authored-by: Francisco <fg@frang.io>
Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>

.changeset/tasty-tomatoes-turn.md

@@ -0,0 +1,5 @@
+---
+'openzeppelin-solidity': major
+---
+
+`Strings`: Rename `toString(int256)` to `toStringSigned(int256)`.

contracts/utils/Strings.sol

@@ -46,7 +46,7 @@ library Strings {
     /**
      * @dev Converts a `int256` to its ASCII `string` decimal representation.
      */
-    function toString(int256 value) internal pure returns (string memory) {
+    function toStringSigned(int256 value) internal pure returns (string memory) {
         return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value)));
     }
 

test/utils/Strings.test.js

@@ -48,22 +48,22 @@ contract('Strings', function () {
     describe('int256', function () {
       it('converts MAX_INT256', async function () {
         const value = constants.MAX_INT256;
-        expect(await this.strings.methods['$toString(int256)'](value)).to.equal(value.toString(10));
+        expect(await this.strings.methods['$toStringSigned(int256)'](value)).to.equal(value.toString(10));
       });
 
       it('converts MIN_INT256', async function () {
         const value = constants.MIN_INT256;
-        expect(await this.strings.methods['$toString(int256)'](value)).to.equal(value.toString(10));
+        expect(await this.strings.methods['$toStringSigned(int256)'](value)).to.equal(value.toString(10));
       });
 
       for (const value of values) {
         it(`convert ${value}`, async function () {
-          expect(await this.strings.methods['$toString(int256)'](value)).to.equal(value);
+          expect(await this.strings.methods['$toStringSigned(int256)'](value)).to.equal(value);
         });
 
         it(`convert negative ${value}`, async function () {
           const negated = new BN(value).neg();
-          expect(await this.strings.methods['$toString(int256)'](negated)).to.equal(negated.toString(10));
+          expect(await this.strings.methods['$toStringSigned(int256)'](negated)).to.equal(negated.toString(10));
         });
       }
     });