fix(eslint-plugin): [unified-signatures] allow overloads with different named and different number of parameters (typescript-eslint#6877)

NotWoods · web-flow · commit 939d6656ebcb · 2023-04-10T11:57:50.000-04:00
diff --git a/packages/eslint-plugin/src/rules/unified-signatures.ts b/packages/eslint-plugin/src/rules/unified-signatures.ts
@@ -212,10 +212,7 @@ export default util.createRule<Options, MessageIds>({
       const bTypeParams =
         b.typeParameters !== undefined ? b.typeParameters.params : undefined;
 
-      if (
-        ignoreDifferentlyNamedParameters &&
-        a.params.length === b.params.length
-      ) {
+      if (ignoreDifferentlyNamedParameters) {
         for (let i = 0; i < a.params.length; i += 1) {
           if (
             a.params[i].type === b.params[i].type &&
diff --git a/packages/eslint-plugin/tests/rules/unified-signatures.test.ts b/packages/eslint-plugin/tests/rules/unified-signatures.test.ts
@@ -169,6 +169,14 @@ function f(a: number | string): void {}
     },
     {
       code: `
+function f(m: number): void;
+function f(v: number, u: string): void;
+function f(v: number, u?: string): void {}
+      `,
+      options: [{ ignoreDifferentlyNamedParameters: true }],
+    },
+    {
+      code: `
 function f(a: boolean, ...c: number[]): void;
 function f(a: boolean, ...d: string[]): void;
 function f(a: boolean, ...c: (number | string)[]): void {}
