Add LinuxMain.swift files to fixtures

Author: bhargavg

Fixtures/InvalidLayouts/DirectTestsWithModules1/Tests/FooTests.swift

@@ -7,12 +7,10 @@ class FooTests: XCTestCase {
     }
 }
 
-#if os(Linux)
-extension FooTests: XCTestCaseProvider {
-    var allTests: [(String, () throws -> Void)] {
+extension FooTests {
+    static var allTests: [(String, FooTests -> () throws -> Void)] {
         return [
             ("testSuccess", testSuccess),
         ]
     }
 }
-#endif

Fixtures/InvalidLayouts/DirectTestsWithModules1/Tests/LinuxMain.swift

@@ -0,0 +1,7 @@
+import XCTest
+
+@testable import ModuleAtest
+
+XCTMain([
+    testCase(BarTests.allTests)
+])

Fixtures/InvalidLayouts/DirectTestsWithModules1/Tests/ModuleA/ModuleATests.swift

@@ -7,13 +7,10 @@ class BarTests: XCTestCase {
     }
 }
 
-#if os(Linux)
-extension BarTests: XCTestCaseProvider {
-    var allTests: [(String, () throws -> Void)] {
+extension BarTests {
+    static var allTests: [(String, BarTests -> () throws -> Void)] {
         return [
             ("testSuccess", testSuccess),
         ]
     }
 }
-#endif
-

Fixtures/InvalidLayouts/DirectTestsWithModules2/Tests/DirectTestsWithModules2/BarTests.swift

@@ -7,13 +7,10 @@ class BarTests: XCTestCase {
     }
 }
 
-#if os(Linux)
-extension BarTests: XCTestCaseProvider {
-    var allTests: [(String, () throws -> Void)] {
+extension BarTests {
+    static var allTests: [(String, BarTests -> () throws -> Void)] {
         return [
             ("testSuccess", testSuccess),
         ]
     }
 }
-#endif
-

Fixtures/InvalidLayouts/DirectTestsWithModules2/Tests/FooTests.swift

@@ -5,12 +5,10 @@ class FooTests: XCTestCase {
     }
 }
 
-#if os(Linux)
-extension FooTests: XCTestCaseProvider {
-    var allTests: [(String, () throws -> Void)] {
+extension FooTests {
+    static var allTests: [(String, FooTests -> () throws -> Void)] {
         return [
             ("testSuccess", testSuccess),
         ]
     }
 }
-#endif

Fixtures/InvalidLayouts/DirectTestsWithModules2/Tests/LinuxMain.swift

@@ -0,0 +1,7 @@
+import XCTest
+
+@testable import DirectTestsWithModules2test
+
+XCTMain([
+    testCase(BarTests.allTests)
+])

Fixtures/ValidLayouts/SingleModule/DirectTests/Tests/FooTests.swift

@@ -5,12 +5,10 @@ class FooTests: XCTestCase {
     }
 }
 
-#if os(Linux)
-extension FooTests: XCTestCaseProvider {
-    var allTests: [(String, () throws -> Void)] {
+extension FooTests {
+    static var allTests: [(String, FooTests -> () throws -> Void)] {
         return [
             ("testSuccess", testSuccess),
         ]
     }
 }
-#endif

Fixtures/ValidLayouts/SingleModule/DirectTests/Tests/LinuxMain.swift

@@ -0,0 +1,7 @@
+import XCTest
+
+@testable import DirectTeststest
+
+XCTMain([
+    testCase(FooTests.allTests)
+])