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Configure all Random instances with the same seed
Issue #413
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170 changes: 170 additions & 0 deletions
170
easy-random-core/src/test/java/org/jeasy/random/RepeatableRandomTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,170 @@ | ||
| /* | ||
| * The MIT License | ||
| * | ||
| * Copyright (c) 2020, Mahmoud Ben Hassine (mahmoud.benhassine@icloud.com) | ||
| * | ||
| * 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 NONINFRINGEMENT. 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 org.jeasy.random; | ||
|
|
||
| import static org.assertj.core.api.Assertions.assertThat; | ||
|
|
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| import java.util.List; | ||
| import java.util.Objects; | ||
| import java.util.concurrent.ThreadLocalRandom; | ||
| import org.junit.jupiter.api.Test; | ||
|
|
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| public class RepeatableRandomTest { | ||
|
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| @Test | ||
| public void validateEqualsAndHashCodeSameRandomInstancePoolSize1() { | ||
| for (int i = 0; i < 3; i++) { | ||
| validateEqualsAndHashCodeSameRandomInstanceImpl(1); | ||
| } | ||
| } | ||
|
|
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| @Test | ||
| public void validateEqualsAndHashCodeSameRandomInstancePoolSize3() { | ||
| for (int i = 0; i < 3; i++) { | ||
| validateEqualsAndHashCodeSameRandomInstanceImpl(3); | ||
| } | ||
| } | ||
|
|
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| private void validateEqualsAndHashCodeSameRandomInstanceImpl(int poolSize) { | ||
| long seed = ThreadLocalRandom.current().nextLong(); | ||
|
|
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| Object instance1 = randomInstance(Pojo.class, seed, poolSize); | ||
| // same seed - hence same object expected | ||
| Object instance2 = randomInstance(Pojo.class, seed, poolSize); | ||
|
|
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| assertThat(instance1) | ||
| .isEqualTo(instance2); | ||
| assertThat(instance1.hashCode()) | ||
| .isEqualTo(instance2.hashCode()); | ||
| } | ||
|
|
||
| private Object randomInstance(Class<?> type, long seed, int poolSize) { | ||
| EasyRandom easyRandom = new EasyRandom(new EasyRandomParameters() | ||
| .objectPoolSize(poolSize) | ||
| .seed(seed) | ||
| .stringLengthRange(3, 5) | ||
| .collectionSizeRange(3, 4)); | ||
| return easyRandom.nextObject(type); | ||
| } | ||
|
|
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| public static class Pojo { | ||
|
|
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| private String id; | ||
|
|
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| private List<PojoA> a; | ||
|
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| private List<PojoB> b; | ||
|
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| Pojo that = (Pojo) o; | ||
| return id.equals(that.id) | ||
| && a.equals(that.a) | ||
| && b.equals(that.b); | ||
| } | ||
|
|
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(id, a, b); | ||
| } | ||
|
|
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| @Override | ||
| public String toString() { | ||
| return "Pojo{" + | ||
| "id='" + id + '\'' + | ||
| ", a=" + a + | ||
| ", b=" + b + | ||
| '}'; | ||
| } | ||
| } | ||
|
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| public static class PojoA { | ||
|
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| private String s; | ||
|
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| // equals/hashCode/toString by id to avoid possible stack overflow | ||
| private Pojo root; | ||
|
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| PojoA that = (PojoA) o; | ||
| return s.equals(that.s) | ||
| && root.id.equals(that.root.id); | ||
| } | ||
|
|
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(s, root.id); | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| return "PojoA{" + | ||
| "s='" + s + '\'' + | ||
| ", root.id=" + root.id + | ||
| '}'; | ||
| } | ||
| } | ||
|
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| public static class PojoB { | ||
|
|
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| private String s; | ||
|
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| @Override | ||
| public boolean equals(Object o) { | ||
| if (this == o) { | ||
| return true; | ||
| } | ||
| if (o == null || getClass() != o.getClass()) { | ||
| return false; | ||
| } | ||
| PojoB that = (PojoB) o; | ||
| return s.equals(that.s); | ||
| } | ||
|
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| @Override | ||
| public int hashCode() { | ||
| return Objects.hash(s); | ||
| } | ||
|
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| @Override | ||
| public String toString() { | ||
| return "PojoB{" + | ||
| "s='" + s + '\'' + | ||
| '}'; | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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|
@@ -41,4 +41,4 @@ void testRandomElementOf() { | |
| // Then | ||
| assertThat(element).isIn(elements); | ||
| } | ||
| } | ||
| } | ||