Moved .forTesting() functions to new importable LambdaRuntimeTestUtils target (#20)

* Created new importable LambdaRuntimeTestUtils target for Environment.forTesting() and other testing utility code.
* Moved Invocation.forTesting() to the LambdaRuntimeTestUtils target.
* Removed unnecessary dependencies in LambdaRuntimeTestUtils target
* Removed NIO imports in LambdaRuntimeTestUtils source files
* Tweaks to imports and code style.

Author: mr-j-tree

Package.swift

@@ -22,6 +22,15 @@ let package = Package(
       name: "LambdaRuntime",
       dependencies: ["AsyncHTTPClient", "NIO", "NIOHTTP1", "NIOFoundationCompat", "Logging", "Base64Kit"]
     ),
-    .testTarget(name: "LambdaRuntimeTests", dependencies: ["LambdaRuntime", "NIOTestUtils", "Logging"])
+    .target(
+      name: "LambdaRuntimeTestUtils",
+      dependencies: ["NIOHTTP1", "LambdaRuntime"]
+    ),
+    .testTarget(name: "LambdaRuntimeTests", dependencies: [
+        "LambdaRuntime",
+        "LambdaRuntimeTestUtils",
+        "NIOTestUtils",
+        "Logging",
+    ])
   ]
 )

Tests/LambdaRuntimeTests/Utils/Environment+TestUtils.swift renamed to Sources/LambdaRuntimeTestUtils/Environment+TestUtils.swift

@@ -1,10 +1,8 @@
-import NIO
-import NIOHTTP1
 @testable import LambdaRuntime
 
 extension Environment {
 
-  static func forTesting(
+  public static func forTesting(
     lambdaRuntimeAPI: String? = nil,
     handler         : String? = nil,
     functionName    : String? = nil,

Tests/LambdaRuntimeTests/Utils/Invocation+TestUtils.swift renamed to Sources/LambdaRuntimeTestUtils/Invocation+TestUtils.swift

@@ -1,11 +1,10 @@
 import Foundation
-import NIO
 import NIOHTTP1
 @testable import LambdaRuntime
 
 extension Invocation {
 
-  static func forTesting(
+  public static func forTesting(
     requestId  : String       = UUID().uuidString.lowercased(),
     timeout    : TimeInterval = 1,
     functionArn: String       = "arn:aws:lambda:us-east-1:123456789012:function:custom-runtime",

Tests/LambdaRuntimeTests/ContextTests.swift

@@ -2,6 +2,7 @@ import Foundation
 import XCTest
 import NIO
 @testable import LambdaRuntime
+import LambdaRuntimeTestUtils
 
 class ContextTests: XCTestCase {
 

Tests/LambdaRuntimeTests/Events/APIGatewayTests.swift

@@ -3,6 +3,7 @@ import XCTest
 import NIO
 import NIOHTTP1
 import NIOFoundationCompat
+import LambdaRuntimeTestUtils
 @testable import LambdaRuntime
 
 class APIGatewayTests: XCTestCase {

Tests/LambdaRuntimeTests/Runtime+CodableTests.swift

@@ -2,6 +2,7 @@ import Foundation
 import XCTest
 import NIO
 import NIOHTTP1
+import LambdaRuntimeTestUtils
 @testable import LambdaRuntime
 
 class RuntimeCodableTests: XCTestCase {