Break out bridging to a separate test source file

Author: tbkka

test/stdlib/ParseFloat64-bridging.swift

@@ -0,0 +1,39 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-build-swift -g %s -o %t/a.out -enable-experimental-feature Extern
+// RUN: %target-codesign %t/a.out
+// RUN: %target-run %t/a.out
+
+// REQUIRES: executable_test
+// REQUIRES: objc_interop
+
+// Needed to declare the ABI entry point
+// REQUIRES: swift_feature_Extern
+
+import StdlibUnittest
+import Foundation
+
+let tests = TestSuite("FloatingPointParsing")
+
+tests.test("Bridged - short") {
+  let s1 = "1.02.03.0"
+  let nss1 = NSString(utf8String: s1)!
+  let bridged = String(nss1)
+  let range = bridged.firstIndex(of: "2")!..<bridged.firstIndex(of: "3")!
+  let sub = bridged[range]
+  let parsed = Float64(sub)
+  expectNotNil(parsed)
+  expectEqual(parsed!.bitPattern, (2.0).bitPattern)
+}
+
+tests.test("Bridged - long") {
+  let s1 = "1.02.0000000000000000000000000000000000000000000000000000000000003.04.05.06.07.08.09.010.011.012.013.014.015.0"
+  let nss1 = NSString(utf8String: s1)!
+  let bridged = String(nss1)
+  let range = bridged.firstIndex(of: "2")!..<bridged.firstIndex(of: "3")!
+  let sub = bridged[range]
+  let parsed = Float64(sub)
+  expectNotNil(parsed)
+  expectEqual(parsed!.bitPattern, (2.0).bitPattern)
+}
+
+runAllTests()