JUnit –リストをテストする方法
まず、hamcrest-coreのJUnitバンドルコピーを除外し、有用なhamcrest-libraryを含めます。これには、Listデータ型をテストするための多くの有用なメソッドが含まれています。
pom.xml
junit junit 4.12 test org.hamcrest hamcrest-core org.hamcrest hamcrest-library 1.3 test
1. リスト文字列をアサート
パッケージorg.hamcrest.collectionを確認してください。CollectionまたはListをテストするための多くの便利なメソッドが含まれています。
ListTest.java
package com.example;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.hamcrest.collection.IsEmptyCollection;
import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.collection.IsCollectionWithSize.hasSize;
import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInAnyOrder;
import static org.hamcrest.collection.IsIterableContainingInOrder.contains;
import static org.hamcrest.MatcherAssert.assertThat;
public class ListTest {
@Test
public void testAssertList() {
List actual = Arrays.asList("a", "b", "c");
List expected = Arrays.asList("a", "b", "c");
//All passed / true
//1. Test equal.
assertThat(actual, is(expected));
//2. If List has this value?
assertThat(actual, hasItems("b"));
//3. Check List Size
assertThat(actual, hasSize(3));
assertThat(actual.size(), is(3));
//4. List order
// Ensure Correct order
assertThat(actual, contains("a", "b", "c"));
// Can be any order
assertThat(actual, containsInAnyOrder("c", "b", "a"));
//5. check empty list
assertThat(actual, not(IsEmptyCollection.empty()));
assertThat(new ArrayList<>(), IsEmptyCollection.empty());
}
}
2. リストの整数をアサート
パッケージorg.hamcrest.numberを確認してください。数値をアサートするメソッドがあります。
ListTest.java
package com.example;
import org.junit.Test;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.hamcrest.collection.IsEmptyCollection;
import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.collection.IsCollectionWithSize.hasSize;
import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInAnyOrder;
import static org.hamcrest.collection.IsIterableContainingInOrder.contains;
import static org.hamcrest.number.OrderingComparison.greaterThanOrEqualTo;
import static org.hamcrest.number.OrderingComparison.lessThan;
import static org.hamcrest.MatcherAssert.assertThat;
public class ListTest {
@Test
public void testAssertList() {
List actual = Arrays.asList(1, 2, 3, 4, 5);
List expected = Arrays.asList(1, 2, 3, 4, 5);
//All passed / true
//1. Test equal.
assertThat(actual, is(expected));
//2. Check List has this value
assertThat(actual, hasItems(2));
//3. Check List Size
assertThat(actual, hasSize(4));
assertThat(actual.size(), is(5));
//4. List order
// Ensure Correct order
assertThat(actual, contains(1, 2, 3, 4, 5));
// Can be any order
assertThat(actual, containsInAnyOrder(5, 4, 3, 2, 1));
//5. check empty list
assertThat(actual, not(IsEmptyCollection.empty()));
assertThat(new ArrayList<>(), IsEmptyCollection.empty());
//6. Test numeric comparisons
assertThat(actual, everyItem(greaterThanOrEqualTo(1)));
assertThat(actual, everyItem(lessThan(10)));
}
}
Noteorg.hamcrest.collectionとorg.hamcrest.numberの両方がhamcrest-libraryに属しています
3. リストオブジェクトのアサート
ListTest.java
package com.example;
import org.junit.Test;
import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import static org.hamcrest.CoreMatchers.*;
import static org.hamcrest.Matchers.hasProperty;
import static org.hamcrest.collection.IsIterableContainingInAnyOrder.containsInAnyOrder;
import static org.junit.Assert.assertThat;
public class ListTest {
@Test
public void testAssertList() {
List list = Arrays.asList(
new Fruit("Banana", 99),
new Fruit("Apple", 20)
);
//Test equals
assertThat(list, hasItems(
new Fruit("Banana", 99),
new Fruit("Apple", 20)
));
assertThat(list, containsInAnyOrder(
new Fruit("Apple", 20),
new Fruit("Banana", 99)
));
//Test class property, and its value
assertThat(list, containsInAnyOrder(
hasProperty("name", is("Apple")),
hasProperty("name", is("Banana"))
));
}
public class Fruit {
public Fruit(String name, int qty) {
this.name = name;
this.qty = qty;
}
private String name;
private int qty;
public int getQty() {
return qty;
}
public void setQty(int qty) {
this.qty = qty;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
//Test equal, override equals() and hashCode()
@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
Fruit fruit = (Fruit) o;
return qty == fruit.qty &&
Objects.equals(name, fruit.name);
}
@Override
public int hashCode() {
return Objects.hash(name, qty);
}
}
}
以下のリストテストの例を共有してください:)