Add placeholder test to arbitrary test target.

Tests/JSONAPIArbitraryTests/PlaceholderTests.swift

@@ -0,0 +1,15 @@
+//
+//  PlaceholderTests.swift
+//  JSONAPIArbitraryTests
+//
+//  Created by Mathew Polzin on 12/7/18.
+//
+
+import XCTest
+import JSONAPIArbitrary
+
+class PlaceholderTests: XCTestCase {
+	func test_Placeholder() {
+
+	}
+}

Tests/JSONAPIArbitraryTests/XCTestManifests.swift

@@ -0,0 +1,15 @@
+import XCTest
+
+extension PlaceholderTests {
+    static let __allTests = [
+        ("test_Placeholder", test_Placeholder),
+    ]
+}
+
+#if !os(macOS)
+public func __allTests() -> [XCTestCaseEntry] {
+    return [
+        testCase(PlaceholderTests.__allTests),
+    ]
+}
+#endif

Tests/JSONAPIOpenAPITests/XCTestManifests.swift

@@ -0,0 +1,20 @@
+import XCTest
+
+extension JSONAPIRelationshipsOpenAPITests {
+    static let __allTests = [
+        ("test_NullableToOne", test_NullableToOne),
+        ("test_OptionalNullableToOne", test_OptionalNullableToOne),
+        ("test_OptionalToMany", test_OptionalToMany),
+        ("test_OptionalToOne", test_OptionalToOne),
+        ("test_ToMany", test_ToMany),
+        ("test_ToOne", test_ToOne),
+    ]
+}
+
+#if !os(macOS)
+public func __allTests() -> [XCTestCaseEntry] {
+    return [
+        testCase(JSONAPIRelationshipsOpenAPITests.__allTests),
+    ]
+}
+#endif

Tests/LinuxMain.swift

@@ -1,10 +1,14 @@
 import XCTest
 
 import JSONAPITests
-import JSONAPITestLibTests
+import JSONAPITestingTests
+import JSONAPIOpenAPITests
+import JSONAPIArbitraryTests
 
 var tests = [XCTestCaseEntry]()
 tests += JSONAPITests.__allTests()
-tests += JSONAPITestLibTests.__allTests()
+tests += JSONAPITestingTests.__allTests()
+tests += JSONAPIOpenAPITests.__allTests()
+tests += JSONAPIArbitraryTests.__allTests()
 
 XCTMain(tests)