Swift: Additional test cases.

Author: geoffw0

swift/ql/test/library-tests/regex/parse.expected

@@ -6549,3 +6549,53 @@ regex.swift:
 
 #  221| [RegExpStar] .*
 #-----| 0 -> [RegExpDot] .
+
+#  227| [RegExpGroup] (?i-s)
+#-----| 0 -> [RegExpConstant, RegExpNormalChar] i-s
+
+#  227| [RegExpSequence] (?i-s)abc
+#-----| 0 -> [RegExpGroup] (?i-s)
+#-----| 1 -> [RegExpConstant, RegExpNormalChar] abc
+
+#  227| [RegExpConstant, RegExpNormalChar] i-s
+
+#  227| [RegExpConstant, RegExpNormalChar] abc
+
+#  230| [RegExpConstant, RegExpNormalChar] abc
+
+#  230| [RegExpSequence] abc(?i)def
+#-----| 0 -> [RegExpConstant, RegExpNormalChar] abc
+#-----| 1 -> [RegExpGroup] (?i)
+#-----| 2 -> [RegExpConstant, RegExpNormalChar] def
+
+#  230| [RegExpGroup] (?i)
+#-----| 0 -> [RegExpConstant, RegExpNormalChar] i
+
+#  230| [RegExpConstant, RegExpNormalChar] i
+
+#  230| [RegExpConstant, RegExpNormalChar] def
+
+#  231| [RegExpConstant, RegExpNormalChar] abc
+
+#  231| [RegExpSequence] abc(?i:def)ghi
+#-----| 0 -> [RegExpConstant, RegExpNormalChar] abc
+#-----| 1 -> [RegExpGroup] (?i:def)
+#-----| 2 -> [RegExpConstant, RegExpNormalChar] ghi
+
+#  231| [RegExpGroup] (?i:def)
+#-----| 0 -> [RegExpConstant, RegExpNormalChar] i:def
+
+#  231| [RegExpConstant, RegExpNormalChar] i:def
+
+#  231| [RegExpConstant, RegExpNormalChar] ghi
+
+#  232| [RegExpGroup] (?i)
+#-----| 0 -> [RegExpConstant, RegExpNormalChar] i
+
+#  232| [RegExpConstant, RegExpNormalChar] i
+
+#  232| [RegExpConstant, RegExpNormalChar] abc
+
+#  232| [RegExpConstant, RegExpNormalChar] -i
+
+#  232| [RegExpConstant, RegExpNormalChar] def

swift/ql/test/library-tests/regex/regex.swift

@@ -223,4 +223,11 @@ func myRegexpMethodsTests(b: Bool, str_unknown: String) throws {
     _ = input.replacingOccurrences(of: ".*", with: "", options: [.regularExpression, .caseInsensitive]) // $ MISSING: regex=.* input=input modes=IGNORECASE
 
     _ = NSString(string: "abc").replacingOccurrences(of: ".*", with: "", options: [.regularExpression, .caseInsensitive], range: NSMakeRange(0, inputNS.length)) // $ MISSING: regex=.* input=inputNS modes=IGNORECASE
+
+    _ = try Regex("(?i-s)abc").firstMatch(in: input) // $ input=input regex=(?i-s)abc MISSING: modes=IGNORECASE SPURIOUS: modes="DOTALL | IGNORECASE"
+
+    // these cases use parse modes on localized areas of the regex, which we don't currently support
+    _ = try Regex("abc(?i)def").firstMatch(in: input) // $ input=input modes=IGNORECASE regex=abc(?i)def
+    _ = try Regex("abc(?i:def)ghi").firstMatch(in: input) // $ input=input modes=IGNORECASE regex=abc(?i:def)ghi
+    _ = try Regex("(?i)abc(?-i)def").firstMatch(in: input) // $ input=input modes=IGNORECASE regex=(?i)abc(?-i)def SPURIOUS: hasParseFailure=
 }