Add GitHub Actions workflow for running tests on push

Also fix FakeSession to conform to VT100ScreenDelegate by adding
the missing screenSendTmuxOSC4Report stub method.

Author: gnachman

.github/workflows/test.yml

@@ -0,0 +1,29 @@
+name: Tests
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+jobs:
+  test:
+    runs-on: macos-14
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          submodules: recursive
+
+      - name: Select Xcode
+        run: sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
+
+      - name: Show Xcode version
+        run: xcodebuild -version
+
+      - name: Build
+        run: make Development
+
+      - name: Run tests
+        run: xcodebuild test -project iTerm2.xcodeproj -scheme ModernTests -parallel-testing-enabled NO

ModernTests/VT100ScreenTests.swift

@@ -1570,6 +1570,10 @@ class FakeSession: NSObject, VT100ScreenDelegate {
 
     func screenSendReport(_ data: Data) {
 
+    }
+
+    func screenSendTmuxOSC4Report(_ data: Data) {
+
     }
 
     func screenDidSendAllPendingReports() {