Merge pull request swiftlang#28863 from Catfish-Man/ducking-types-test

Catfish-Man · web-flow · commit 6936d0dc60b4 · 2019-12-18T17:24:39.000-08:00
Add a test for incorrectly constructing a Set from an NSArray
diff --git a/test/stdlib/NSSetAPI.swift b/test/stdlib/NSSetAPI.swift
@@ -67,6 +67,12 @@ NSSetAPI.test("AnyHashable containing NSSet that contains an NSSet") {
   }
 }
 
+NSSetAPI.test("Incorrectly constructed Set for backwards compatibility") {
+  let array:NSArray = [NSObject()] as NSArray
+  let wrongSet = Set<NSObject>(_immutableCocoaSet: array)
+  print(wrongSet.startIndex)
+}
+
 var NSOrderedSetAPI = TestSuite("NSOrderedSetAPI")
 
 NSOrderedSetAPI.test("Sequence") {

Original file line number	Diff line number	Diff line change
`@@ -67,6 +67,12 @@ NSSetAPI.test("AnyHashable containing NSSet that contains an NSSet") {`
`67`	`67`	`}`
`68`	`68`	`}`
`69`	`69`
	`70`	`+NSSetAPI.test("Incorrectly constructed Set for backwards compatibility") {`
	`71`	`+ let array:NSArray = [NSObject()] as NSArray`
	`72`	`+ let wrongSet = Set<NSObject>(_immutableCocoaSet: array)`
	`73`	`+ print(wrongSet.startIndex)`
	`74`	`+}`
	`75`	`+`
`70`	`76`	`var NSOrderedSetAPI = TestSuite("NSOrderedSetAPI")`
`71`	`77`
`72`	`78`	`NSOrderedSetAPI.test("Sequence") {`