workflows: Run unit tests using GitHub Actions (#200)

* workflows: Re-enable tests job

* workflows: Disable tests on Windows

Requires NIO support on Windows

* workflows: Disable end-to-end tests in GitHub Actions

There is a good chance that GitHub Actions will be able to run these tests,
but we will disable them for now in order to get the unit tests running.
The end-to-end tests could not run with swift-ci, so disabling them here
does not reduce CI coverage.

Author: euanh

.github/workflows/pull_request.yml

@@ -5,11 +5,12 @@ on:
     types: [opened, reopened, synchronize]
 
 jobs:
-  # tests:
-  #   name: Test
-  #   uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
-  #   with:
-  #     linux_pre_build_command: apt-get update && apt-get install -y locales locales-all libsqlite3-dev
+  tests:
+    name: Test
+    uses: swiftlang/github-workflows/.github/workflows/swift_package_test.yml@main
+    with:
+      linux_pre_build_command: apt-get update && apt-get install -y locales locales-all libsqlite3-dev
+      enable_windows_checks: false
   soundness:
     name: Soundness
     uses: swiftlang/github-workflows/.github/workflows/soundness.yml@main

Tests/SwiftSDKGeneratorTests/EndToEndTests.swift

@@ -121,7 +121,9 @@ final class RepeatedBuildTests: XCTestCase {
   private let logger = Logger(label: "swift-sdk-generator")
 
   func testRepeatedSDKBuilds() async throws {
-    if ProcessInfo.processInfo.environment.keys.contains("JENKINS_URL") {
+    if ProcessInfo.processInfo.environment.keys.contains("JENKINS_URL")
+      || ProcessInfo.processInfo.environment.keys.contains("GITHUB_ACTIONS")
+    {
       throw XCTSkip(
         "EndToEnd tests cannot currently run in CI: https://github.com/swiftlang/swift-sdk-generator/issues/145"
       )
@@ -296,7 +298,9 @@ func buildTestcases(config: SDKConfiguration) async throws {
   var logger = Logger(label: "EndToEndTests")
   logger[metadataKey: "testcase"] = "testPackageInitExecutable"
 
-  if ProcessInfo.processInfo.environment.keys.contains("JENKINS_URL") {
+  if ProcessInfo.processInfo.environment.keys.contains("JENKINS_URL")
+    || ProcessInfo.processInfo.environment.keys.contains("GITHUB_ACTIONS")
+  {
     throw XCTSkip(
       "EndToEnd tests cannot currently run in CI: https://github.com/swiftlang/swift-sdk-generator/issues/145"
     )