fix: allow to ignore floating promise with void operator: @typescript-eslint/no-floating-promises

Author: theoludwig

.eslintrc.json

@@ -140,7 +140,7 @@
     "no-useless-return": "error",
     "no-else-return": ["error", { "allowElseIf": false }],
     "no-var": "error",
-    "no-void": "error",
+    "no-void": ["error", { "allowAsStatement": true }],
     "no-with": "error",
     "object-shorthand": ["error", "properties"],
     "one-var": ["error", { "initialized": "never" }],

test/fixtures/typescript-no-errors-ignore-promise.ts

@@ -0,0 +1,3 @@
+const returnsPromise = async (): Promise<void> => {}
+
+void returnsPromise()

test/validate-config.js

@@ -37,3 +37,10 @@ test("ensure we allow top-level await", async () => {
   )
   assert.strictEqual(lintResult?.errorCount, 0)
 })
+
+test("ensure we allow to ignore floating promise with void operator (@typescript-eslint/no-floating-promises)", async () => {
+  const [lintResult] = await eslint.lintFiles(
+    "test/fixtures/typescript-no-errors-ignore-promise.ts",
+  )
+  assert.strictEqual(lintResult?.errorCount, 0)
+})