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Posted to server-dev@james.apache.org by ad...@apache.org on 2017/07/10 17:54:39 UTC
[27/41] james-project git commit: JAMES-2082 Provide unit tests for
FluentFutureStream util
JAMES-2082 Provide unit tests for FluentFutureStream util
This helps making explicit why several methods are required
Project: http://git-wip-us.apache.org/repos/asf/james-project/repo
Commit: http://git-wip-us.apache.org/repos/asf/james-project/commit/73b50e5e
Tree: http://git-wip-us.apache.org/repos/asf/james-project/tree/73b50e5e
Diff: http://git-wip-us.apache.org/repos/asf/james-project/diff/73b50e5e
Branch: refs/heads/master
Commit: 73b50e5e3e00384e9f093df944d7c85d8c387b7a
Parents: 6b1c3e7
Author: benwa <bt...@linagora.com>
Authored: Sun Jul 9 15:17:21 2017 +0700
Committer: Antoine Duprat <ad...@linagora.com>
Committed: Mon Jul 10 14:23:58 2017 +0200
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.../james/util/FluentFutureStreamTest.java | 236 +++++++++++++++++++
1 file changed, 236 insertions(+)
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http://git-wip-us.apache.org/repos/asf/james-project/blob/73b50e5e/server/container/util-java8/src/test/java/org/apache/james/util/FluentFutureStreamTest.java
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diff --git a/server/container/util-java8/src/test/java/org/apache/james/util/FluentFutureStreamTest.java b/server/container/util-java8/src/test/java/org/apache/james/util/FluentFutureStreamTest.java
new file mode 100644
index 0000000..6bc692c
--- /dev/null
+++ b/server/container/util-java8/src/test/java/org/apache/james/util/FluentFutureStreamTest.java
@@ -0,0 +1,236 @@
+/****************************************************************
+ * 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.james.util;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.Optional;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentLinkedDeque;
+import java.util.stream.Stream;
+
+import org.junit.Test;
+
+import com.github.steveash.guavate.Guavate;
+
+public class FluentFutureStreamTest {
+
+ @Test
+ public void ofFutureShouldConstructAFluentFutureStream() {
+ assertThat(
+ FluentFutureStream.ofFutures(
+ CompletableFuture.completedFuture(1),
+ CompletableFuture.completedFuture(2),
+ CompletableFuture.completedFuture(3))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(1, 2, 3);
+ }
+
+ @Test
+ public void ofShouldConstructAFluentFutureStreamWhenProvidedAFutureOfStream() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(1, 2, 3);
+ }
+
+ @Test
+ public void ofShouldConstructAFluentFutureStreamWhenProvidedAStreamOfFuture() {
+ assertThat(
+ FluentFutureStream.of(
+ Stream.of(
+ CompletableFuture.completedFuture(1),
+ CompletableFuture.completedFuture(2),
+ CompletableFuture.completedFuture(3)))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(1, 2, 3);
+ }
+
+ @Test
+ public void ofNestedStreamsShouldConstructAFluentFutureStreamWhenProvidedAStreamOfFutureOfStream() {
+ assertThat(
+ FluentFutureStream.ofNestedStreams(
+ Stream.of(
+ CompletableFuture.completedFuture(Stream.of(1, 2)),
+ CompletableFuture.completedFuture(Stream.of()),
+ CompletableFuture.completedFuture(Stream.of(3))))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(1, 2, 3);
+ }
+
+
+ @Test
+ public void ofOptionalsShouldConstructAFluentFutureStreamWhenProvidedAStreamOfFutureOfOptionals() {
+ assertThat(
+ FluentFutureStream.ofOptionals(
+ Stream.of(
+ CompletableFuture.completedFuture(Optional.of(1)),
+ CompletableFuture.completedFuture(Optional.of(2)),
+ CompletableFuture.completedFuture(Optional.empty()),
+ CompletableFuture.completedFuture(Optional.of(3))))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(1, 2, 3);
+ }
+
+ @Test
+ public void completableFutureShouldReturnAFutureOfTheUnderLayingStream() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .completableFuture()
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(1, 2, 3);
+ }
+
+ @Test
+ public void mapShouldTransformUnderlyingValues() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .map(i -> i + 1)
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(2, 3, 4);
+ }
+
+ @Test
+ public void flatMapShouldTransformUnderlyingValuesAndFlatMapResult() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .flatMap(i -> Stream.of(i, i + 1))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(1, 2, 2, 3, 3, 4);
+ }
+
+ @Test
+ public void flatMapOptionalShouldTransformUnderlyingValuesAndUnboxResult() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .flatMapOptional(i -> Optional.of(i + 1)
+ .filter(j -> j % 2 == 0))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(2, 4);
+ }
+
+ @Test
+ public void reduceShouldGatherAllValuesOfTheUnderlyingStream() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .reduce((a, b) -> a + b)
+ .join())
+ .contains(6);
+ }
+
+ @Test
+ public void reduceShouldGatherAllValuesOfTheUnderlyingStreamWithAnEmptyValue() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .reduce(0, (a, b) -> a + b)
+ .join())
+ .isEqualTo(6);
+ }
+
+ @Test
+ public void filterShouldBeAppliedOnTheUnderlyingStream() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .filter(i -> i % 2 == 1)
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(1, 3);
+ }
+
+ @Test
+ public void thenComposeOnAllShouldTransformUnderlyingValuesAndComposeFutures() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .thenComposeOnAll(i -> CompletableFuture.completedFuture(i + 1))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(2, 3, 4);
+ }
+
+ @Test
+ public void thenFlatComposeShouldTransformUnderlyingValuesAndComposeFuturesWithStreamUnboxing() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .thenFlatCompose(i -> CompletableFuture.completedFuture(Stream.of(i, i + 1)))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(1, 2, 2, 3, 3, 4);
+ }
+
+ @Test
+ public void thenFlatComposeOnOptionalShouldTransformUnderlyingValuesAndComposeFuturesWithOptionalUnboxing() {
+ assertThat(
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .thenFlatComposeOnOptional(i -> CompletableFuture.completedFuture(Optional.of(i + 1)
+ .filter(j -> j % 2 == 0)))
+ .join()
+ .collect(Guavate.toImmutableList()))
+ .containsExactly(2, 4);
+ }
+
+ @Test
+ public void thenPerformOnAllShouldGenerateASynchronousSideEffectForAllElementsOfTheUnderlyingStream() {
+ ConcurrentLinkedDeque<Integer> sideEffects = new ConcurrentLinkedDeque<>();
+
+ FluentFutureStream.of(
+ CompletableFuture.completedFuture(
+ Stream.of(1, 2, 3)))
+ .performOnAll(i -> {
+ sideEffects.addLast(i);
+ return CompletableFuture.completedFuture(null);
+ })
+ .join()
+ .collect(Guavate.toImmutableList());
+
+ assertThat(sideEffects).containsOnly(1, 2, 3);
+ }
+
+}
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