[StdlibUnittest] Warn if no tests were executed

ktoso · ktoso · commit e32d221e2a9f · 2025-07-02T19:38:50.000+09:00
diff --git a/stdlib/private/StdlibUnittest/StdlibUnittest.swift b/stdlib/private/StdlibUnittest/StdlibUnittest.swift
@@ -1588,6 +1588,9 @@ class _ParentProcess {
         _testSuiteFailedCallback()
       } else {
         print("\(testSuite.name): All tests passed")
+        if testSuite._tests.isEmpty {
+          print("WARNING: SUITE '\(testSuite.name)' CONTAINED NO TESTS! NO TESTS WERE EXECUTED!")
+        }
       }
     }
     let (failed: failedOnShutdown, ()) = _shutdownChild()

Original file line number	Diff line number	Diff line change
`@@ -1588,6 +1588,9 @@ class _ParentProcess {`
`1588`	`1588`	`_testSuiteFailedCallback()`
`1589`	`1589`	`} else {`
`1590`	`1590`	`print("\(testSuite.name): All tests passed")`
	`1591`	`+ if testSuite._tests.isEmpty {`
	`1592`	`+ print("WARNING: SUITE '\(testSuite.name)' CONTAINED NO TESTS! NO TESTS WERE EXECUTED!")`
	`1593`	`+ }`
`1591`	`1594`	`}`
`1592`	`1595`	`}`
`1593`	`1596`	`let (failed: failedOnShutdown, ()) = _shutdownChild()`