Let Swift Package Manager support Linux, too (#6)

* update .gitignore

* Support Linux on Swift Package Manager

* fix as #6 (comment)

* fix as #6 (comment)

Author: dankogai

LinuxMain.swift

@@ -0,0 +1,10 @@
+import XCTest
+@testable import SipHashTests
+@testable import PrimitiveTypeTests
+@testable import SipHashableTests
+
+XCTMain([
+          testCase(SipHashTests.allTests),
+          testCase(PrimitiveTypeTests.allTests),
+          testCase(SipHashableTests.allTests),
+])

SipHashTests/PrimitiveTypeTests.swift

@@ -467,4 +467,26 @@ class PrimitiveTypeTests: XCTestCase {
 
         XCTAssertEqual(actual, expected)
     }
+    //
+    // you have to manually register linux tests here :-(
+    //
+    static var allTests = [
+      ("testBoolTrue",        testBoolTrue),
+      ("testInt",             testInt),
+      ("testUInt",            testUInt),
+      ("testInt64",           testInt64),
+      ("testUInt64",          testUInt64),
+      ("testInt32",           testInt32),
+      ("testUInt32",          testUInt32),
+      ("testInt16",           testInt16),
+      ("testUInt16",          testUInt16),
+      ("testInt8",            testInt8),
+      ("testUInt8",           testUInt8),
+      ("testFloat",           testFloat),
+      ("testDouble",          testDouble),
+      ("testFloat80",         testFloat80),
+      // ("testCGFloat",         testCGFloat), // missing in Linux
+      ("testOptional_nil",    testOptional_nil),
+      ("testOptional_nonnil", testOptional_nonnil),
+    ]
 }

SipHashTests/SipHashTests.swift

@@ -140,4 +140,12 @@ class SipHashTests: XCTestCase {
             }
         }
     }
+    //
+    // you have to manually register linux tests here :-(
+    //
+    static var allTests = [
+        ("testVectors", testVectors),
+        ("testSplits", testSplits),
+        ("testDefaultKey",  testDefaultKey),
+    ]
 }

SipHashTests/SipHashableTests.swift

@@ -56,4 +56,12 @@ class SipHashableTests: XCTestCase {
 
         XCTAssertEqual(hash1, hash2)
     }
+    //
+    // you have to manually register linux tests here :-(
+    //
+    static var allTests = [
+      ("testBookHashValue", testBookHashValue),
+      ("testBookEquality", testBookEquality),
+      ("testAddSipHashable", testAddSipHashable),
+    ]
 }