DarwinCompatibility: Disable tests that use new API not yet in Foundation

Author: spevans

Diff for: TestFoundation/TestFileHandle.swift

@@ -7,6 +7,8 @@
 // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 //
 
+#if !DARWIN_COMPATIBILITY_TESTS // Disable until Foundation has the new FileHandle API
+
 import Dispatch
 
 class TestFileHandle : XCTestCase {
@@ -484,3 +486,5 @@ class TestFileHandle : XCTestCase {
         ]
     }
 }
+
+#endif

Diff for: TestFoundation/TestNSCalendar.swift

@@ -751,6 +751,7 @@ class TestNSCalendar: XCTestCase {
     }
 
     func test_rangeOfWeekendStartDate_interval_containingDate() throws {
+#if !DARWIN_COMPATIBILITY_TESTS // NSCalender range(ofWeekendContaining:) is experimental
         try enumerateTestWeekends() { (calendar, interval) in
             let startDateResult = calendar.range(ofWeekendContaining: interval.start)
             XCTAssertEqual(startDateResult, interval)
@@ -764,6 +765,7 @@ class TestNSCalendar: XCTestCase {
             let oneSecondBeforeEndResult = calendar.range(ofWeekendContaining: interval.end - 1)
             XCTAssertEqual(oneSecondBeforeEndResult, interval)
         }
+#endif
     }
 
     func test_enumerateDatesStartingAfterDate_chineseEra_matchYearOne() throws {

Diff for: TestFoundation/TestPipe.swift

@@ -7,6 +7,7 @@
 // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 //
 
+#if !DARWIN_COMPATIBILITY_TESTS     // Disable until Foundation has the new FileHandle API
 class TestPipe: XCTestCase {
 
     static var allTests: [(String, (TestPipe) -> () throws -> Void)] {
@@ -57,3 +58,4 @@ class TestPipe: XCTestCase {
         XCTAssertEqual(text, convertedData)
     }
 }
+#endif

Diff for: TestFoundation/TestScanner.swift

@@ -7,6 +7,8 @@
 // See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 //
 
+#if !DARWIN_COMPATIBILITY_TESTS     // Disable until Foundation has the new Scanner API
+
 fileprivate func withScanner(for string: String, invoking block: ((Scanner) throws -> Void)? = nil) rethrows {
     let scanner = Scanner(string: string)
     scanner.locale = Locale(identifier: "en_US_POSIX")
@@ -481,3 +483,5 @@ class TestScanner : XCTestCase {
         ]
     }
 }
+
+#endif