Add integration test. Run with ./gradlew runIntegrationTest

src/integration-test/java/com/replaymod/extra/DownloadOpenEye.java

@@ -0,0 +1,25 @@
+package com.replaymod.extra;
+
+import com.replaymod.core.AbstractTask;
+import com.replaymod.extras.OpenEyeExtra;
+import net.minecraftforge.fml.common.Loader;
+
+import java.io.File;
+import java.nio.file.NoSuchFileException;
+
+public class DownloadOpenEye extends AbstractTask {
+    @Override
+    protected void init() {
+        expectGui(OpenEyeExtra.OfferGui.class, offerGui -> {
+            click(offerGui.yesButton);
+            expectGuiClosed(20 * 1000, () -> {
+                File targetFile = new File(mc.mcDataDir, "mods/" + Loader.MC_VERSION + "/OpenEye.jar");
+                if (!targetFile.exists()) {
+                    future.setException(new NoSuchFileException(targetFile.getAbsolutePath()));
+                } else {
+                    future.set(null);
+                }
+            });
+        });
+    }
+}