#303 fk records

src/main/java/io/github/eocqrs/kafka/fake/FkRecords.java

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+/*
+ *  Copyright (c) 2023 Aliaksei Bialiauski, EO-CQRS
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.eocqrs.kafka.fake;
+
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.apache.kafka.clients.consumer.ConsumerRecords;
+import org.apache.kafka.common.TopicPartition;
+import org.cactoos.Scalar;
+import org.cactoos.list.ListOf;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Fake Records.
+ *
+ * @author Aliaksei Bialiauski (abialiauski.dev@gmail.com)
+ * @since 0.3.5
+ */
+public final class FkRecords implements
+  Scalar<ConsumerRecords<Object, String>> {
+
+  public static final int DEFAULT_PARTITION = 0;
+  public static final long ZERO_OFFSET = 0L;
+  private final String topic;
+  private final Collection<String> datasets;
+
+  public FkRecords(
+    final String tpc,
+    final Collection<String> dtst
+  ) {
+    this.topic = tpc;
+    this.datasets = dtst;
+  }
+
+  @Override
+  public ConsumerRecords<Object, String> value() throws Exception {
+    final Map<TopicPartition, List<ConsumerRecord<Object, String>>> part
+      = new HashMap<>();
+    final List<ConsumerRecord<Object, String>> recs = new ListOf<>();
+    this.datasets.forEach(
+      dataset -> recs.add(
+        new ConsumerRecord<>(
+          this.topic,
+          DEFAULT_PARTITION,
+          ZERO_OFFSET,
+          null,
+          dataset
+        )
+      )
+    );
+    part.put(new TopicPartition(this.topic, DEFAULT_PARTITION), recs);
+    return new ConsumerRecords<>(part);
+  }
+}

src/test/java/io/github/eocqrs/kafka/fake/FkRecordsTest.java

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+/*
+ *  Copyright (c) 2023 Aliaksei Bialiauski, EO-CQRS
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package io.github.eocqrs.kafka.fake;
+
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.cactoos.list.ListOf;
+import org.hamcrest.MatcherAssert;
+import org.hamcrest.Matchers;
+import org.junit.jupiter.api.Test;
+
+import java.util.function.Consumer;
+
+/**
+ * Test case for {@link FkRecords}.
+ *
+ * @author Aliaksei Bialiauski (abialiauski.dev@gmail.com)
+ * @since 0.3.5
+ */
+final class FkRecordsTest {
+
+  @Test
+  void readsRecordsInRightFormat() throws Exception {
+    final String topic = "test";
+    final String value = "test";
+    new FkRecords(topic, new ListOf<>(value))
+      .value()
+      .forEach(rec ->
+        MatcherAssert.assertThat(
+          "Records in right format",
+          rec.value(),
+          Matchers.equalTo(value)
+        ));
+  }
+
+  @Test
+  void readsCountInRightFormat() throws Exception {
+    final String topic = "test";
+    MatcherAssert.assertThat(
+      "Records Count in right format",
+      new FkRecords(
+        topic,
+        new ListOf<>(
+          "first",
+          "second"
+        )
+      ).value().count(),
+      Matchers.equalTo(2)
+    );
+  }
+}