[Tests] Add regression tests for pull request swiftlang#7

swiftlang#7 fix a
problem with XCTAssertEqualsWithAccuracy. This test ensures
that fix does not regress.

Author: modocache

Tests/Functional/NegativeAccuracyTestCase/main.swift

@@ -0,0 +1,51 @@
+// RUN: %{swiftc} %s -o %{built_tests_dir}/NegativeAccuracyTestCase
+// RUN: %{built_tests_dir}/NegativeAccuracyTestCase > %t || true
+// RUN: %{xctest_checker} %t %s
+// CHECK: Test Case 'NegativeAccuracyTestCase.test_equalWithAccuracy_passes' started.
+// CHECK: Test Case 'NegativeAccuracyTestCase.test_equalWithAccuracy_passes' passed \(\d+\.\d+ seconds\).
+// CHECK: Test Case 'NegativeAccuracyTestCase.test_equalWithAccuracy_fails' started.
+// CHECK: .*/Tests/Functional/NegativeAccuracyTestCase/main.swift:39: error: NegativeAccuracyTestCase.test_equalWithAccuracy_fails : XCTAssertEqualWithAccuracy failed: \(\"0\.0\"\) is not equal to \(\"0\.2\"\) \+\/- \(\"-0\.1\"\) - $
+// CHECK: Test Case 'NegativeAccuracyTestCase.test_equalWithAccuracy_fails' failed \(\d+\.\d+ seconds\).
+// CHECK: Test Case 'NegativeAccuracyTestCase.test_notEqualWithAccuracy_passes' started.
+// CHECK: Test Case 'NegativeAccuracyTestCase.test_notEqualWithAccuracy_passes' passed \(\d+\.\d+ seconds\).
+// CHECK: Test Case 'NegativeAccuracyTestCase.test_notEqualWithAccuracy_fails' started.
+// CHECK: .*/Tests/Functional/NegativeAccuracyTestCase/main.swift:47: error: NegativeAccuracyTestCase.test_notEqualWithAccuracy_fails : XCTAssertNotEqualWithAccuracy failed: \("1\.0"\) is equal to \("2\.0"\) \+/- \("-1\.0"\) - $
+// CHECK: Test Case 'NegativeAccuracyTestCase.test_notEqualWithAccuracy_fails' failed \(\d+\.\d+ seconds\).
+// CHECK: Executed 4 tests, with 2 failures \(0 unexpected\) in \d+\.\d+ \(\d+\.\d+\) seconds
+// CHECK: Total executed 4 tests, with 2 failures \(0 unexpected\) in \d+\.\d+ \(\d+\.\d+\) seconds
+
+#if os(Linux) || os(FreeBSD)
+    import XCTest
+#else
+    import SwiftXCTest
+#endif
+
+// Regression test for https://github.com/apple/swift-corelibs-xctest/pull/7
+class NegativeAccuracyTestCase: XCTestCase {
+    var allTests: [(String, () -> ())] {
+        return [
+            ("test_equalWithAccuracy_passes", test_equalWithAccuracy_passes),
+            ("test_equalWithAccuracy_fails", test_equalWithAccuracy_fails),
+            ("test_notEqualWithAccuracy_passes", test_notEqualWithAccuracy_passes),
+            ("test_notEqualWithAccuracy_fails", test_notEqualWithAccuracy_fails),
+        ]
+    }
+
+    func test_equalWithAccuracy_passes() {
+        XCTAssertEqualWithAccuracy(0, 0.1, accuracy: -0.1)
+    }
+
+    func test_equalWithAccuracy_fails() {
+        XCTAssertEqualWithAccuracy(0, 0.2, accuracy: -0.1)
+    }
+
+    func test_notEqualWithAccuracy_passes() {
+        XCTAssertNotEqualWithAccuracy(1, 2, -0.5)
+    }
+
+    func test_notEqualWithAccuracy_fails() {
+        XCTAssertNotEqualWithAccuracy(1, 2, -1)
+    }
+}
+
+XCTMain([NegativeAccuracyTestCase()])

XCTest.xcodeproj/project.pbxproj

@@ -44,6 +44,7 @@
 		DA78F7F61C4039410082E15B /* compare.py */ = {isa = PBXFileReference; lastKnownFileType = text.script.python; path = compare.py; sourceTree = "<group>"; };
 		DA78F7F81C4039410082E15B /* main.py */ = {isa = PBXFileReference; lastKnownFileType = text.script.python; path = main.py; sourceTree = "<group>"; };
 		DA78F7FA1C4039410082E15B /* xctest_checker.py */ = {isa = PBXFileReference; lastKnownFileType = text.script.python; path = xctest_checker.py; sourceTree = "<group>"; };
+		DADB97581C406879005E68B6 /* main.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = main.swift; sourceTree = "<group>"; };
 		EA3E74BB1BF2B6D500635A73 /* build_script.py */ = {isa = PBXFileReference; lastKnownFileType = text.script.python; path = build_script.py; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
@@ -122,6 +123,7 @@
 			children = (
 				DA78F7E91C4039410082E15B /* lit.cfg */,
 				DA78F7EA1C4039410082E15B /* SingleFailingTestCase */,
+				DADB97571C406879005E68B6 /* NegativeAccuracyTestCase */,
 				DA78F7ED1C4039410082E15B /* xctest_checker */,
 			);
 			path = Functional;
@@ -166,6 +168,14 @@
 			path = xctest_checker;
 			sourceTree = "<group>";
 		};
+		DADB97571C406879005E68B6 /* NegativeAccuracyTestCase */ = {
+			isa = PBXGroup;
+			children = (
+				DADB97581C406879005E68B6 /* main.swift */,
+			);
+			path = NegativeAccuracyTestCase;
+			sourceTree = "<group>";
+		};
 		EA3E74BC1BF2B6D700635A73 /* Linux Build */ = {
 			isa = PBXGroup;
 			children = (