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AssertJ Object in Java with Examples - AssertJ 155

AssertJ Object in Java with Examples – AssertJ 155

AssertJ Object in Java with Examples

為用 Java 編寫的測試程式提供了流暢的斷言語句，這些斷言語句通常與 JUnit 測試一起使用， AssertJ 斷言的基本方法是 assertThat 方法，驗證 Object 是否相同元素、大小， AssertJ Object in Java 本篇增加了範例，並透過單元測試來驗證產出結果。

檔案目錄

./
   +- src
       +- test
       |   +- org
       |       +- ruoxue
       |           +- spring_boot_168
       |               +- test
       |                   +- assertj
       |                       +- object
       |                           +- AssertJObjectWithExamplesTest.java

單元測試

AssertJ Object Java 斷言物件的主要目的是取得物件以進行斷言。

has

驗證是否符合條件，若不成立，則會拋出 AssertionError 。

	@Test
	public void has() {
		Object value = "AssertJ";
		System.out.println(value);
		Condition<Object> equals = new Condition<Object>(o -> o.equals("AssertJ"), "equals");
		assertThat(value).has(equals);

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		Condition<Object> toString = new Condition<Object>(o -> o.toString().equals("155"), "toString");
		assertThat(value).has(toString);
	}
AssertJ
155

hasSameClassAs

AssertJ Object Java 驗證類別是否相同，若不成立，則會拋出 AssertionError 。

	@Test
	public void hasSameClassAs() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).hasSameClassAs("151");

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).hasSameClassAs(BigDecimal.valueOf(151));
	}
AssertJ
155

hasSameHashCodeAs

AssertJ Object Java 驗證 hash code 是否相同，若不成立，則會拋出 AssertionError 。

	@Test
	public void hasSameHashCodeAs() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).hasSameHashCodeAs("AssertJ");

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).hasSameHashCodeAs(BigDecimal.valueOf(155));
	}
AssertJ
155

hasToString

AssertJ Object Java 驗證 toString 是否相同，若不成立，則會拋出 AssertionError 。

	@Test
	public void hasToString() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).hasToString("AssertJ");

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).hasToString("155");
	}
AssertJ
155

doesNotHave

AssertJ Object Java 驗證是否不符合條件，若不成立，則會拋出 AssertionError 。

	@Test
	public void doesNotHave() {
		Object value = "AssertJ";
		System.out.println(value);
		Condition<Object> equals = new Condition<Object>(o -> o.equals("155"), "equals");
		assertThat(value).doesNotHave(equals);

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		Condition<Object> toString = new Condition<Object>(o -> o.toString().equals("AssertJ"), "toString");
		assertThat(value).doesNotHave(toString);
	}
AssertJ
155

doesNotHaveSameClassAs

Java AssertJ Object 驗證類別是否不相同，若不成立，則會拋出 AssertionError 。

	@Test
	public void doesNotHaveSameClassAs() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).doesNotHaveSameClassAs(BigDecimal.valueOf(155));

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).doesNotHaveSameClassAs("AssertJ");
	}
AssertJ
155

doesNotHaveSameHashCodeAs

Java AssertJ Object 驗證 hash code 是否不相同，若不成立，則會拋出 AssertionError 。

	@Test
	public void doesNotHaveSameHashCodeAs() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).doesNotHaveSameHashCodeAs(BigDecimal.valueOf(155));

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).doesNotHaveSameHashCodeAs("AssertJ");
	}

AssertJ
155

doesNotHaveToString

Java AssertJ Object 驗證 toString 是否不相同，若不成立，則會拋出 AssertionError 。

	@Test
	public void doesNotHaveToString() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).doesNotHaveToString("155");

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).doesNotHaveToString("AssertJ");
	}
AssertJ
155

AssertJObjectWithExamplesTest.java

Java AssertJ Object 新增單元測試，驗證是否符合預期。

package org.ruoxue.spring_boot_168.test.assertj.object;

import static org.assertj.core.api.Assertions.*;

import java.math.BigDecimal;

import org.assertj.core.api.Condition;
import org.junit.jupiter.api.Test;

public class AssertJObjectWithExamplesTest {

	@Test
	public void has() {
		Object value = "AssertJ";
		System.out.println(value);
		Condition<Object> equals = new Condition<Object>(o -> o.equals("AssertJ"), "equals");
		assertThat(value).has(equals);

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		Condition<Object> toString = new Condition<Object>(o -> o.toString().equals("155"), "toString");
		assertThat(value).has(toString);
	}

	@Test
	public void hasSameClassAs() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).hasSameClassAs("151");

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).hasSameClassAs(BigDecimal.valueOf(151));
	}

	@Test
	public void hasSameHashCodeAs() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).hasSameHashCodeAs("AssertJ");

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).hasSameHashCodeAs(BigDecimal.valueOf(155));
	}

	@Test
	public void hasToString() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).hasToString("AssertJ");

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).hasToString("155");
	}

	@Test
	public void doesNotHave() {
		Object value = "AssertJ";
		System.out.println(value);
		Condition<Object> equals = new Condition<Object>(o -> o.equals("155"), "equals");
		assertThat(value).doesNotHave(equals);

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		Condition<Object> toString = new Condition<Object>(o -> o.toString().equals("AssertJ"), "toString");
		assertThat(value).doesNotHave(toString);
	}

	@Test
	public void doesNotHaveSameClassAs() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).doesNotHaveSameClassAs(BigDecimal.valueOf(155));

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).doesNotHaveSameClassAs("AssertJ");
	}

	@Test
	public void doesNotHaveSameHashCodeAs() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).doesNotHaveSameHashCodeAs(BigDecimal.valueOf(155));

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).doesNotHaveSameHashCodeAs("AssertJ");
	}

	@Test
	public void doesNotHaveToString() {
		Object value = "AssertJ";
		System.out.println(value);
		assertThat(value).doesNotHaveToString("155");

		value = BigDecimal.valueOf(155);
		System.out.println(value);
		assertThat(value).doesNotHaveToString("AssertJ");
	}
}

心得分享

Java AssertJ Object Example 提高了測試程式碼的可讀性，基本方法是 assertThat 方法，善用 Java AssertJ Object 將有助於驗證效率的提升。

原碼下載

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