Update simple test to check if JNI+Rust works

Author: sungshik

src/test/java/engineering/swat/watch/impl/mac/NativeEventStreamTests.java

@@ -0,0 +1,83 @@
+/*
+ * BSD 2-Clause License
+ *
+ * Copyright (c) 2023, Swat.engineering
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+package engineering.swat.watch.impl.mac;
+
+import static org.awaitility.Awaitility.await;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.WatchEvent.Kind;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.awaitility.Awaitility;
+import org.checkerframework.checker.nullness.qual.Nullable;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import engineering.swat.watch.TestDirectory;
+import engineering.swat.watch.TestHelper;
+
+public class NativeEventStreamTests {
+
+    private TestDirectory testDir;
+
+    @BeforeEach
+    void setup() throws IOException {
+        testDir = new TestDirectory();
+    }
+
+    @AfterEach
+    void cleanup() {
+        if (testDir != null) {
+            testDir.close();
+        }
+    }
+
+    @BeforeAll
+    static void setupEverything() {
+        Awaitility.setDefaultTimeout(TestHelper.NORMAL_WAIT);
+    }
+
+    @Test
+    void signalsAreSent() throws IOException, InterruptedException {
+        var signaled = new AtomicBoolean(false);
+        try (var stream = new NativeEventStream(testDir.getTestDirectory(),
+            new NativeEventHandler() {
+                @Override
+                public <T> void handle(Kind<T> kind, @Nullable T context) {
+                    signaled.set(true);
+                }
+            }
+        )) {
+            stream.open();
+            Files.write(testDir.getTestFiles().get(0), "Hello".getBytes());
+            await("Signal received").untilTrue(signaled);
+        }
+    }
+}