Create FileLogger JNI (#1517)

photon-targeting/src/test/java/wpiutil_extras/FileLoggerTest.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) Photon Vision.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package wpiutil_extras;
+
+import static org.junit.jupiter.api.Assertions.fail;
+
+import edu.wpi.first.hal.HAL;
+import java.io.IOException;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.photonvision.jni.PhotonTargetingJniLoader;
+import org.photonvision.jni.QueuedFileLogger;
+import org.photonvision.jni.WpilibLoader;
+
+public class FileLoggerTest {
+    @BeforeAll
+    public static void load_wpilib() throws UnsatisfiedLinkError, IOException {
+        if (!WpilibLoader.loadLibraries()) {
+            fail();
+        }
+        if (!PhotonTargetingJniLoader.load()) {
+            fail();
+        }
+
+        HAL.initialize(1000, 0);
+    }
+
+    @AfterAll
+    public static void teardown() {
+        HAL.shutdown();
+    }
+
+    @Test
+    public void smoketest() throws InterruptedException {
+        var logger = new QueuedFileLogger("/var/log/kern.log");
+        for (int i = 0; i < 100; i++) {
+            Thread.sleep(1000);
+
+            for (var line : logger.getNewlines()) {
+                System.out.println(" ->:" + line);
+            }
+        }
+
+        logger.stop();
+    }
+}