Added test case for parallel watches that should not overlap

Author: DavyLandman

src/test/java/engineering/swat/watch/ParallelWatches.java

@@ -0,0 +1,144 @@
+/*
+ * 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;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.time.Duration;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import org.awaitility.Awaitility;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+class ParallelWatches {
+    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 directoryAndFile() throws IOException {
+        var dirTriggered = new AtomicBoolean();
+        var fileTriggered = new AtomicBoolean();
+        var file = testDir.getTestFiles().get(0);
+        var file2 = testDir.getTestFiles().get(1);
+        assertEquals(testDir.getTestDirectory(), file.getParent(), "Test file should be a direct child of the test dir");
+        assertEquals(testDir.getTestDirectory(), file2.getParent(), "Test file should be a direct child of the test dir");
+        try (var dirWatch = Watch.build(testDir.getTestDirectory(), WatchScope.PATH_AND_CHILDREN)
+            .on(e -> dirTriggered.set(true))
+            .start()) {
+            try (var fileWatch = Watch.build(file, WatchScope.PATH_ONLY).on(e -> fileTriggered.set(true)).start())  {
+                Files.write(file, "test".getBytes());
+                Awaitility.await()
+                    .alias("Directory should have picked up the file")
+                    .untilTrue(dirTriggered);
+                Awaitility.await()
+                    .alias("File should have picked up the file")
+                    .untilTrue(fileTriggered);
+
+                dirTriggered.set(false);
+                fileTriggered.set(false);
+
+                Awaitility.await()
+                    .alias("should remain false")
+                    .pollDelay(TestHelper.SHORT_WAIT.minus(Duration.ofMillis(100)))
+                    .untilFalse(fileTriggered);
+
+                assertFalse(dirTriggered.get(), "Directory should also have not seen new events");
+
+                Files.write(file2, "test2".getBytes());
+                Awaitility.await()
+                    .alias("Directory should have picked up the file")
+                    .untilTrue(dirTriggered);
+                Awaitility.await()
+                    .alias("File should not have picked up the file")
+                    .during(TestHelper.SHORT_WAIT)
+                    .untilFalse(fileTriggered);
+            }
+        }
+    }
+
+    @Test
+    void nestedDirectory() throws IOException {
+        var dirTriggered = new AtomicBoolean();
+        var nestedDirTriggered = new AtomicBoolean();
+        var dir1 = testDir.getTestDirectory();
+        var dir2 = dir1.resolve("nested");
+        Files.createDirectories(dir2);
+        try (var dirWatch = Watch.build(dir1, WatchScope.PATH_AND_ALL_DESCENDANTS)
+            .on(e -> dirTriggered.set(true))
+            .start()) {
+            try (var nestedDirWatch = Watch.build(dir2, WatchScope.PATH_AND_CHILDREN).on(e -> nestedDirTriggered.set(true)).start())  {
+                Files.write(dir1.resolve("a1.txt"), "1".getBytes());
+                Awaitility.await().alias("Directory should have picked up the file")
+                    .untilTrue(dirTriggered);
+                Awaitility.await().alias("Nested dir should not have picked up the file")
+                    .during(TestHelper.SHORT_WAIT)
+                    .untilFalse(nestedDirTriggered);
+
+                dirTriggered.set(false);
+
+                Awaitility.await()
+                    .alias("should remain false")
+                    .pollDelay(TestHelper.SHORT_WAIT.minus(Duration.ofMillis(100)))
+                    .untilFalse(dirTriggered);
+
+                assertFalse(nestedDirTriggered.get(), "Nested directory should also have not seen new events");
+
+                Files.write(dir2.resolve("a2.txt"), "test2".getBytes());
+                Awaitility.await()
+                    .alias("Directory should have picked up the file")
+                    .untilTrue(dirTriggered);
+                Awaitility.await()
+                    .alias("Nested directory should have picked up the file")
+                    .untilTrue(nestedDirTriggered);
+            }
+        }
+    }
+
+
+}