Merge pull request swiftlang#2223 from ahoppen/ahoppen/test-examples

Run tests of the Examples package in CI

Author: ahoppen

SwiftSyntaxDevUtils/Sources/swift-syntax-dev-utils/commands/Test.swift

@@ -26,6 +26,7 @@ struct Test: ParsableCommand, BuildCommand {
   func run() throws {
     try runTests()
     try runCodeGenerationTests()
+    try runExamplesTests()
 
     logSection("All tests passed")
   }
@@ -55,6 +56,18 @@ struct Test: ParsableCommand, BuildCommand {
     )
   }
 
+  private func runExamplesTests() throws {
+    logSection("Running Examples Tests")
+    try invokeSwiftPM(
+      action: "test",
+      packageDir: Paths.examplesDir,
+      additionalArguments: ["--test-product", "ExamplesPackageTests"],
+      additionalEnvironment: swiftPMEnvironmentVariables,
+      captureStdout: false,
+      captureStderr: false
+    )
+  }
+
   private func findSwiftpmBinPath(packageDir: URL) throws -> String {
     return try invokeSwiftPM(
       action: "build",