chore(runner): update better error message for nested test (vitest-de…

…v#4652)

Co-authored-by: Vladimir Sheremet <sleuths.slews0s@icloud.com>

packages/runner/src/suite.ts

@@ -13,7 +13,7 @@ export const suite = createSuite()
 export const test = createTest(
   function (name: string | Function, fn?: TestFunction, options?: number | TestOptions) {
     if (getCurrentTest())
-      throw new Error('Nested tests are not allowed')
+      throw new Error('Calling the test function inside another test function is not allowed. Please put it inside "describe" or "suite" so it can be properly collected.')
 
     getCurrentSuite().test.fn.call(this, formatName(name), fn, options)
   },

test/core/test/nested-test.test.ts

@@ -3,28 +3,28 @@ import { describe, expect, test } from 'vitest'
 test('nested test should throw error', () => {
   expect(() => {
     test('test inside test', () => {})
-  }).toThrowErrorMatchingInlineSnapshot(`[Error: Nested tests are not allowed]`)
+  }).toThrowErrorMatchingInlineSnapshot(`[Error: Calling the test function inside another test function is not allowed. Please put it inside "describe" or "suite" so it can be properly collected.]`)
 
   expect(() => {
     test.each([1, 2, 3])('test.each inside test %d', () => {})
-  }).toThrowErrorMatchingInlineSnapshot(`[Error: Nested tests are not allowed]`)
+  }).toThrowErrorMatchingInlineSnapshot(`[Error: Calling the test function inside another test function is not allowed. Please put it inside "describe" or "suite" so it can be properly collected.]`)
 
   expect(() => {
     test.skipIf(false)('test.skipIf inside test', () => {})
-  }).toThrowErrorMatchingInlineSnapshot(`[Error: Nested tests are not allowed]`)
+  }).toThrowErrorMatchingInlineSnapshot(`[Error: Calling the test function inside another test function is not allowed. Please put it inside "describe" or "suite" so it can be properly collected.]`)
 })
 
 describe('parallel tests', () => {
   test.concurrent('parallel test 1 with nested test', () => {
     expect(() => {
       test('test inside test', () => {})
-    }).toThrowErrorMatchingInlineSnapshot(`[Error: Nested tests are not allowed]`)
+    }).toThrowErrorMatchingInlineSnapshot(`[Error: Calling the test function inside another test function is not allowed. Please put it inside "describe" or "suite" so it can be properly collected.]`)
   })
   test.concurrent('parallel test 2 without nested test', () => {})
   test.concurrent('parallel test 3 without nested test', () => {})
   test.concurrent('parallel test 4 with nested test', () => {
     expect(() => {
       test('test inside test', () => {})
-    }).toThrowErrorMatchingInlineSnapshot(`[Error: Nested tests are not allowed]`)
+    }).toThrowErrorMatchingInlineSnapshot(`[Error: Calling the test function inside another test function is not allowed. Please put it inside "describe" or "suite" so it can be properly collected.]`)
   })
 })