Split up tests into separate unit tests and performance tests targets

Author: ole

Package.swift

@@ -21,7 +21,10 @@ let package = Package(
             dependencies: [],
             path: "Sources"),
         .testTarget(
-            name: "SortedArrayTests",
+            name: "UnitTests",
+            dependencies: ["SortedArray"]),
+        .testTarget(
+            name: "PerformanceTests",
             dependencies: ["SortedArray"]),
     ],
     swiftLanguageVersions: [4]

Tests/LinuxMain.swift

@@ -1,5 +1,6 @@
 import XCTest
-@testable import SortedArrayTests
+@testable import UnitTests
+@testable import PerformanceTests
 
 XCTMain([
      testCase(SortedArrayTests.allTests),