Add a unit test for tests that can link against executables.

Author: abertelrud

Tests/FunctionalTests/MiscellaneousTests.swift

@@ -537,6 +537,20 @@ class MiscellaneousTestCase: XCTestCase {
         }
     }
 
+    func testTestsCanLinkAgainstExecutable() {
+        fixture(name: "Miscellaneous/ExeTest") { prefix in
+            do {
+                let (stdout, _) = try executeSwiftTest(prefix)
+                XCTAssertMatch(stdout, .contains("Compiling Exe main.swift"))
+                XCTAssertMatch(stdout, .contains("Compiling ExeTests ExeTests.swift"))
+                XCTAssertMatch(stdout, .contains("Eliding symbols from Exe_main.swift.o"))
+                XCTAssertMatch(stdout, .contains("Linking ExeTestPackageTests"))
+            } catch {
+                XCTFail()
+            }
+        }
+    }
+
     func testExecutableTargetMismatch() {
         fixture(name: "Miscellaneous/TargetMismatch") { path in
             do {