Add test cases for only-match-at-start with lookaheads

natecook1000 · natecook1000 · commit 21434ae6b238 · 2025-09-29T12:52:46.000-05:00
diff --git a/Tests/RegexTests/CompileTests.swift b/Tests/RegexTests/CompileTests.swift
@@ -589,5 +589,9 @@ extension RegexTests {
     try expectCanOnlyMatchAtStart("(foo)?^bar", true)  // The initial group must match ""
     try expectCanOnlyMatchAtStart("(?:foo)?^bar", true)
     try expectCanOnlyMatchAtStart("(foo)+^bar", false) // This can't actually match anywhere
+    
+    // Test lookahead assertions with anchor
+    try expectCanOnlyMatchAtStart("(?=^)foo", true)
+    try expectCanOnlyMatchAtStart("(?!^)foo", false)
   }
 }

Original file line number	Diff line number	Diff line change
`@@ -589,5 +589,9 @@ extension RegexTests {`
`589`	`589`	`try expectCanOnlyMatchAtStart("(foo)?^bar", true) // The initial group must match ""`
`590`	`590`	`try expectCanOnlyMatchAtStart("(?:foo)?^bar", true)`
`591`	`591`	`try expectCanOnlyMatchAtStart("(foo)+^bar", false) // This can't actually match anywhere`
	`592`	`+`
	`593`	`+ // Test lookahead assertions with anchor`
	`594`	`+ try expectCanOnlyMatchAtStart("(?=^)foo", true)`
	`595`	`+ try expectCanOnlyMatchAtStart("(?!^)foo", false)`
`592`	`596`	`}`
`593`	`597`	`}`