feat(api): add getGlobalTestNamePattern method

docs/advanced/api/vitest.md

@@ -375,6 +375,14 @@ This methods overrides the global [test name pattern](/config/#testnamepattern).
 This method doesn't start running any tests. To run tests with updated pattern, call [`runTestSpecifications`](#runtestspecifications).
 :::
 
+## getGlobalTestNamePattern
+
+```ts
+function getGlobalTestNamePattern(): RegExp | undefined
+```
+
+Returns the regexp used for the global test name pattern.
+
 ## resetGlobalTestNamePattern
 
 ```ts

packages/vitest/src/node/core.ts

@@ -1001,6 +1001,16 @@ export class Vitest {
     }
   }
 
+  /**
+   * Returns the regexp used for the global test name pattern.
+   */
+  public getGlobalTestNamePattern(): RegExp | undefined {
+    if (this.configOverride.testNamePattern != null) {
+      return this.configOverride.testNamePattern
+    }
+    return this.config.testNamePattern
+  }
+
   /**
    * Resets the global test name pattern. This method doesn't run any tests.
    */

test/cli/test/public-api.test.ts

@@ -94,3 +94,22 @@ it.each([
     })
   })
 })
+
+it('can modify the global test name pattern', async () => {
+  const { ctx } = await runVitest({
+    testNamePattern: 'custom',
+    include: ['non-existing'],
+  })
+
+  expect(ctx?.getGlobalTestNamePattern()).toEqual(/custom/)
+
+  // reset just removes the override, user config is not touched
+  ctx?.resetGlobalTestNamePattern()
+  expect(ctx?.getGlobalTestNamePattern()).toEqual(/custom/)
+
+  ctx?.setGlobalTestNamePattern(/new pattern/)
+  expect(ctx?.getGlobalTestNamePattern()).toEqual(/new pattern/)
+
+  ctx?.resetGlobalTestNamePattern()
+  expect(ctx?.getGlobalTestNamePattern()).toEqual(/custom/)
+})