test: cross language test cases for reservoir sampling sketch

src/test/java/org/apache/datasketches/sampling/ReservoirCrossLanguageTest.java

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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.datasketches.sampling;
+
+import org.apache.datasketches.common.ArrayOfDoublesSerDe;
+import org.apache.datasketches.common.ArrayOfLongsSerDe;
+import org.apache.datasketches.common.ArrayOfStringsSerDe;
+import org.testng.annotations.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+
+import static org.apache.datasketches.common.TestUtil.GENERATE_JAVA_FILES;
+import static org.apache.datasketches.common.TestUtil.javaPath;
+
+/**
+ * Serialize binary sketches to be tested by other language code.
+ * Test deserialization of binary sketches serialized by other language code.
+ */
+public class ReservoirCrossLanguageTest {
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirLongsSketchEmpty() throws IOException {
+    final int k = 128;
+    final ReservoirLongsSketch sk = ReservoirLongsSketch.newInstance(k);
+
+    Files.newOutputStream(javaPath.resolve("reservoir_longs_empty_k" + k + "_java.sk"))
+        .write(sk.toByteArray());
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirLongsSketchExact() throws IOException {
+    final int k = 128;
+    final int[] nArr = {1, 10, 32, 100, 128};
+
+    for (final int n : nArr) {
+      final ReservoirLongsSketch sk = ReservoirLongsSketch.newInstance(k);
+      for (int i = 0; i < n; i++) {
+        sk.update(i);
+      }
+      Files.newOutputStream(javaPath.resolve("reservoir_longs_exact_n" + n + "_k" + k + "_java.sk"))
+          .write(sk.toByteArray());
+    }
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirLongsSketchSampling() throws IOException {
+    final int[] kArr = {32, 64, 128};
+    final long n = 1000;
+
+    for (final int k : kArr) {
+      final long[] predeterminedSamples = new long[k];
+      for (int i = 0; i < k; i++) {
+        predeterminedSamples[i] = i * 2;
+      }
+
+      final ReservoirLongsSketch sk = ReservoirLongsSketch.getInstance(
+          predeterminedSamples,
+          n,
+          org.apache.datasketches.common.ResizeFactor.X8,
+          k
+      );
+
+      Files.newOutputStream(javaPath.resolve("reservoir_longs_sampling_n" + n + "_k" + k + "_java.sk"))
+          .write(sk.toByteArray());
+    }
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirItemsSketchLongEmpty() throws IOException {
+    final int k = 128;
+    final ReservoirItemsSketch<Long> sk = ReservoirItemsSketch.newInstance(k);
+
+    Files.newOutputStream(javaPath.resolve("reservoir_items_long_empty_k" + k + "_java.sk"))
+        .write(sk.toByteArray(new ArrayOfLongsSerDe()));
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirItemsSketchLongExact() throws IOException {
+    final int k = 128;
+    final int[] nArr = {1, 10, 32, 100, 128};
+
+    for (final int n : nArr) {
+      final ReservoirItemsSketch<Long> sk = ReservoirItemsSketch.newInstance(k);
+      for (int i = 0; i < n; i++) {
+        sk.update((long) i);
+      }
+      Files.newOutputStream(javaPath.resolve("reservoir_items_long_exact_n" + n + "_k" + k + "_java.sk"))
+          .write(sk.toByteArray(new ArrayOfLongsSerDe()));
+    }
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirItemsSketchLongSampling() throws IOException {
+    final int[] kArr = {32, 64, 128};
+    final long n = 1000;
+
+    for (final int k : kArr) {
+      final java.util.ArrayList<Long> predeterminedSamples = new java.util.ArrayList<>();
+      for (int i = 0; i < k; i++) {
+        predeterminedSamples.add((long) (i * 2));
+      }
+
+      final ReservoirItemsSketch<Long> sk = ReservoirItemsSketch.newInstance(
+          predeterminedSamples,
+          n,
+          org.apache.datasketches.common.ResizeFactor.X8,
+          k
+      );
+
+      Files.newOutputStream(javaPath.resolve("reservoir_items_long_sampling_n" + n + "_k" + k + "_java.sk"))
+          .write(sk.toByteArray(new ArrayOfLongsSerDe()));
+    }
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirItemsSketchDoubleEmpty() throws IOException {
+    final int k = 128;
+    final ReservoirItemsSketch<Double> sk = ReservoirItemsSketch.newInstance(k);
+
+    Files.newOutputStream(javaPath.resolve("reservoir_items_double_empty_k" + k + "_java.sk"))
+        .write(sk.toByteArray(new ArrayOfDoublesSerDe()));
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirItemsSketchDoubleExact() throws IOException {
+    final int k = 128;
+    final int[] nArr = {1, 10, 32, 100, 128};
+
+    for (final int n : nArr) {
+      final ReservoirItemsSketch<Double> sk = ReservoirItemsSketch.newInstance(k);
+      for (int i = 0; i < n; i++) {
+        sk.update((double) i);
+      }
+      Files.newOutputStream(javaPath.resolve("reservoir_items_double_exact_n" + n + "_k" + k + "_java.sk"))
+          .write(sk.toByteArray(new ArrayOfDoublesSerDe()));
+    }
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirItemsSketchDoubleSampling() throws IOException {
+    final int[] kArr = {32, 64, 128};
+    final long n = 1000;
+
+    for (final int k : kArr) {
+      final java.util.ArrayList<Double> predeterminedSamples = new java.util.ArrayList<>();
+      for (int i = 0; i < k; i++) {
+        predeterminedSamples.add((double) (i * 2));
+      }
+
+      final ReservoirItemsSketch<Double> sk = ReservoirItemsSketch.newInstance(
+          predeterminedSamples,
+          n,
+          org.apache.datasketches.common.ResizeFactor.X8,
+          k
+      );
+
+      Files.newOutputStream(javaPath.resolve("reservoir_items_double_sampling_n" + n + "_k" + k + "_java.sk"))
+          .write(sk.toByteArray(new ArrayOfDoublesSerDe()));
+    }
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirItemsSketchStringEmpty() throws IOException {
+    final int k = 128;
+    final ReservoirItemsSketch<String> sk = ReservoirItemsSketch.newInstance(k);
+
+    Files.newOutputStream(javaPath.resolve("reservoir_items_string_empty_k" + k + "_java.sk"))
+        .write(sk.toByteArray(new ArrayOfStringsSerDe()));
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirItemsSketchStringExact() throws IOException {
+    final int k = 128;
+    final int[] nArr = {1, 10, 32, 100, 128};
+
+    for (final int n : nArr) {
+      final ReservoirItemsSketch<String> sk = ReservoirItemsSketch.newInstance(k);
+      for (int i = 0; i < n; i++) {
+        sk.update("item" + i);
+      }
+      Files.newOutputStream(javaPath.resolve("reservoir_items_string_exact_n" + n + "_k" + k + "_java.sk"))
+          .write(sk.toByteArray(new ArrayOfStringsSerDe()));
+    }
+  }
+
+  @Test(groups = {GENERATE_JAVA_FILES})
+  public void generateReservoirItemsSketchStringSampling() throws IOException {
+    final int[] kArr = {32, 64, 128};
+    final long n = 1000;
+
+    for (final int k : kArr) {
+      final java.util.ArrayList<String> predeterminedSamples = new java.util.ArrayList<>();
+      for (int i = 0; i < k; i++) {
+        predeterminedSamples.add("item" + (i * 2));
+      }
+
+      final ReservoirItemsSketch<String> sk = ReservoirItemsSketch.newInstance(
+          predeterminedSamples,
+          n,
+          org.apache.datasketches.common.ResizeFactor.X8,
+          k
+      );
+
+      Files.newOutputStream(javaPath.resolve("reservoir_items_string_sampling_n" + n + "_k" + k + "_java.sk"))
+          .write(sk.toByteArray(new ArrayOfStringsSerDe()));
+    }
+  }
+}