test: add test and readme

README.md

@@ -33,6 +33,11 @@ See [Conventional Commits](https://www.conventionalcommits.org/) for sample titl
 **Optional.** URL to be used when linking the "Details" in the actions overview.
 > Default: `"https://www.conventionalcommits.org/en/v1.0.0/#summary"`.
 
+### `scope-required`
+
+**Optional.** Set to `true` if you want to fail in case the scope isn't set.
+> Default: `false`.
+
 ## Outputs
 
 ### `success`

action.yml

@@ -23,7 +23,7 @@ inputs:
     required: false
     default: https://www.conventionalcommits.org/en/v1.0.0/#summary
   scope-required:
-    description: Set to true if you want to fail in case the scope isn't set
+    description: Set to true if you want to fail in case the scope isn't set.
     required: false
     default: false
     type: boolean

src/validateTitle.test.js

@@ -41,3 +41,9 @@ it('throws for PR titles with an unknown type', async () => {
     /Unknown release type "foo" found in pull request title "foo: Bar"./
   );
 });
+
+it('throws for PR titles without a scope when its required', async () => {
+  await expect(validateTitle(preset, 'feat: Add feature', true)).rejects.toThrow(
+    /No scope found in pull request title "feat: Add feature" but it's required./
+  );
+});