fix: Setters should always have a void return type

Closes #1215

Author: Gerrit0

src/lib/converter/factories/signature.ts

@@ -2,6 +2,7 @@ import * as ts from "typescript";
 import * as assert from "assert";
 import {
     DeclarationReflection,
+    IntrinsicType,
     ParameterReflection,
     PredicateType,
     Reflection,
@@ -67,6 +68,8 @@ export function createSignature(
     const predicate = context.checker.getTypePredicateOfSignature(signature);
     if (predicate) {
         sigRef.type = convertPredicate(predicate, context.withScope(sigRef));
+    } else if (kind == ReflectionKind.SetSignature) {
+        sigRef.type = new IntrinsicType("void");
     } else {
         sigRef.type = context.converter.convertType(
             context.withScope(sigRef),

src/test/converter2.test.ts

@@ -7,6 +7,7 @@ import {
     DeclarationReflection,
     ProjectReflection,
     ReflectionKind,
+    SignatureReflection,
 } from "../lib/models";
 
 function query(project: ProjectReflection, name: string) {
@@ -56,6 +57,12 @@ const issueTests: Record<string, (project: ProjectReflection) => void> = {
         equal(refl.signatures?.[0]?.comment?.returns, "Test description.\n");
     },
 
+    gh1215(project) {
+        const foo = query(project, "Foo.bar");
+        ok(foo.setSignature instanceof SignatureReflection);
+        equal(foo.setSignature.type?.toString(), "void");
+    },
+
     gh1255(project) {
         const foo = query(project, "C.foo");
         equal(foo.comment?.shortText, "Docs!");

src/test/converter2/issues/gh1215.d.ts

@@ -0,0 +1,3 @@
+declare class Foo {
+    set bar(bar: string);
+}