[x-asserts-in-one] Single Assert Call for Multiple Properties in JUnit5 (#13413)

testing-modules/junit-5-advanced/pom.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <artifactId>junit-5-advanced</artifactId>
     <version>1.0-SNAPSHOT</version>
@@ -27,6 +27,12 @@
             <version>${jmockit.version}</version>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>
@@ -46,6 +52,7 @@
 
     <properties>
         <jmockit.version>1.49</jmockit.version>
+        <assertj.version>3.24.2</assertj.version>
     </properties>
 
 </project>

testing-modules/junit-5-advanced/src/test/java/com/baeldung/multiassertions/MultiAssertionsInOneUnitTest.java

@@ -0,0 +1,94 @@
+package com.baeldung.multiassertions;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.from;
+import static org.junit.jupiter.api.Assertions.assertAll;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.math.BigDecimal;
+import org.junit.jupiter.api.Test;
+
+public class MultiAssertionsInOneUnitTest {
+    private static final Product EXPECTED = new Product(42L, "LG Monitor", "32 inches, 4K Resolution, Ideal for programmer", true, new BigDecimal("429.99"), 77);
+    private static final Product TO_BE_TESTED = new Product(-1L, "LG Monitor", "dummy value: whatever", true, new BigDecimal("429.99"), 77);
+
+    @Test
+    void givenAProductObject_whenUsingAssertAll_thenAssertMultiPropertiesInOneCall() {
+        //@formatter:off
+        assertAll("Verify Product properties",
+          () -> assertEquals(EXPECTED.getName(), TO_BE_TESTED.getName()),
+          () -> assertEquals(EXPECTED.isOnSale(), TO_BE_TESTED.isOnSale()),
+          () -> assertEquals(EXPECTED.getStockQuantity(), TO_BE_TESTED.getStockQuantity()),
+          () -> assertEquals(EXPECTED.getPrice(), TO_BE_TESTED.getPrice()));
+        //@formatter:on
+    }
+
+    @Test
+    void givenAProductObject_whenUsingAssertJExtracting_thenAssertMultiPropertiesInOneCall() {
+        //@formatter:off
+        assertThat(TO_BE_TESTED)
+          .extracting("name", "onSale", "stockQuantity", "price")
+          .containsExactly(EXPECTED.getName(), EXPECTED.isOnSale(), EXPECTED.getStockQuantity(), EXPECTED.getPrice());
+
+        assertThat(TO_BE_TESTED)
+          .extracting(Product::getName, Product::isOnSale, Product::getStockQuantity,Product::getPrice)
+          .containsExactly(EXPECTED.getName(), EXPECTED.isOnSale(), EXPECTED.getStockQuantity(), EXPECTED.getPrice());
+        //@formatter:on
+    }
+
+    @Test
+    void givenAProductObject_whenUsingAssertJReturns_thenAssertMultiPropertiesInOneCall() {
+        //@formatter:off
+        assertThat(TO_BE_TESTED)
+          .returns(EXPECTED.getName(),from(Product::getName))
+          .returns(EXPECTED.isOnSale(), from(Product::isOnSale))
+          .returns(EXPECTED.getStockQuantity(), from(Product::getStockQuantity))
+          .returns(EXPECTED.getPrice(), from(Product::getPrice))
+
+          .doesNotReturn(EXPECTED.getId(), from(Product::getId))
+          .doesNotReturn(EXPECTED.getDescription(), from(Product::getDescription));
+        //@formatter:on
+    }
+}
+
+class Product {
+    private Long id;
+    private String name;
+    private String description;
+    private boolean onSale;
+    private BigDecimal price;
+    private int stockQuantity;
+
+    public Product(Long id, String name, String description, boolean onSale, BigDecimal price, int stockQuantity) {
+        this.id = id;
+        this.name = name;
+        this.description = description;
+        this.onSale = onSale;
+        this.price = price;
+        this.stockQuantity = stockQuantity;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public boolean isOnSale() {
+        return onSale;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    public int getStockQuantity() {
+        return stockQuantity;
+    }
+}