Table of Contents
ToggleAssertJ Class Methods
提供了一組豐富的斷言和真正有用的錯誤訊息,驗證 Class 是否為空值、實例相等, 提高了測試程式碼的可讀性,使用 AssertJ Class Java Methods 流式斷言驗證程式碼,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
| +- clazz
| +- AssertJClassMethodsTest.java
單元測試
AssertJ Class Methods Java 斷言類別的主要目的是取得類別以進行斷言。
isNull
AssertJ Class Methods Java 驗證是否為空值,若不成立,則會拋出 AssertionError 。
@Test
public void isNull() {
Class<?> clazz = null;
System.out.println(clazz);
assertThat(clazz).isNull();
Class<?> clazz2 = null;
System.out.println(clazz2);
assertThat(clazz2).isNull();
}
null
null
isNotNull
AssertJ Class Methods Java 驗證是否不為空值,若不成立,則會拋出 AssertionError 。
@Test
public void isNotNull() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).isNotNull();
Class<?> clazz2 = Integer.class;
System.out.println(clazz2);
assertThat(clazz2).isNotNull();
}
class java.lang.String
class java.lang.Integer
isEqualTo
AssertJ Class Methods in Java 驗證類別是否相等,若不成立,則會拋出 AssertionError 。
@Test
public void isEqualTo() {
Class<?> clazz = String.class;
Class<?> clazz2 = String.class;
System.out.println(clazz);
System.out.println(clazz2);
assertThat(clazz).isEqualTo(clazz2);
Class<?> intClazz = Integer.class;
Class<?> intClazz2 = Integer.class;
System.out.println(intClazz);
System.out.println(intClazz2);
assertThat(intClazz).isEqualTo(intClazz2);
}
class java.lang.String
class java.lang.String
class java.lang.Integer
class java.lang.Integer
isNotEqualTo
AssertJ Class Methods in Java 驗證類別是否不相等,若不成立,則會拋出 AssertionError 。
@Test
public void isNotEqualTo() {
Class<?> clazz = String.class;
Class<?> clazz2 = Character.class;
System.out.println(clazz);
System.out.println(clazz2);
assertThat(clazz).isNotEqualTo(clazz2);
Class<?> intClazz = Integer.class;
Class<?> intClazz2 = Double.class;
System.out.println(intClazz);
System.out.println(intClazz2);
assertThat(intClazz).isNotEqualTo(intClazz2);
}
class java.lang.String
class java.lang.Character
class java.lang.Integer
class java.lang.Double
isSameAs
AssertJ Class Functions in Java 驗證類別是否相等,若不成立,則會拋出 AssertionError 。
@Test
public void isSameAs() {
Class<?> clazz = String.class;
Class<?> clazz2 = clazz;
System.out.println(clazz);
System.out.println(clazz2);
assertThat(clazz).isSameAs(clazz2);
Class<?> intClazz = Integer.class;
Class<?> intClazz2 = intClazz;
System.out.println(intClazz);
System.out.println(intClazz2);
assertThat(intClazz).isSameAs(intClazz2);
}
class java.lang.String
class java.lang.String
class java.lang.Integer
class java.lang.Integer
isNotSameAs
AssertJ Class Functions in Java 驗證類別是否不相等,若不成立,則會拋出 AssertionError 。
@Test
public void isNotSameAs() {
Class<?> clazz = String.class;
Class<?> clazz2 = Character.class;
System.out.println(clazz);
System.out.println(clazz2);
assertThat(clazz).isNotSameAs(clazz2);
Class<?> intClazz = Integer.class;
Class<?> intClazz2 = Double.class;
System.out.println(intClazz);
System.out.println(intClazz2);
assertThat(intClazz).isNotSameAs(intClazz2);
}
class java.lang.String
class java.lang.Character
class java.lang.Integer
class java.lang.Double
AssertJClassMethodsTest.java
AssertJ Class Methods in Java 新增單元測試,驗證是否符合預期。
package org.ruoxue.spring_boot_168.test.assertj.clazz;
import static org.assertj.core.api.Assertions.*;
import org.junit.jupiter.api.Test;
public class AssertJClassMethodsTest {
@Test
public void isNull() {
Class<?> clazz = null;
System.out.println(clazz);
assertThat(clazz).isNull();
Class<?> clazz2 = null;
System.out.println(clazz2);
assertThat(clazz2).isNull();
}
@Test
public void isNotNull() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).isNotNull();
Class<?> clazz2 = Integer.class;
System.out.println(clazz2);
assertThat(clazz2).isNotNull();
}
@Test
public void isEqualTo() {
Class<?> clazz = String.class;
Class<?> clazz2 = String.class;
System.out.println(clazz);
System.out.println(clazz2);
assertThat(clazz).isEqualTo(clazz2);
Class<?> intClazz = Integer.class;
Class<?> intClazz2 = Integer.class;
System.out.println(intClazz);
System.out.println(intClazz2);
assertThat(intClazz).isEqualTo(intClazz2);
}
@Test
public void isNotEqualTo() {
Class<?> clazz = String.class;
Class<?> clazz2 = Character.class;
System.out.println(clazz);
System.out.println(clazz2);
assertThat(clazz).isNotEqualTo(clazz2);
Class<?> intClazz = Integer.class;
Class<?> intClazz2 = Double.class;
System.out.println(intClazz);
System.out.println(intClazz2);
assertThat(intClazz).isNotEqualTo(intClazz2);
}
@Test
public void isSameAs() {
Class<?> clazz = String.class;
Class<?> clazz2 = clazz;
System.out.println(clazz);
System.out.println(clazz2);
assertThat(clazz).isSameAs(clazz2);
Class<?> intClazz = Integer.class;
Class<?> intClazz2 = intClazz;
System.out.println(intClazz);
System.out.println(intClazz2);
assertThat(intClazz).isSameAs(intClazz2);
}
@Test
public void isNotSameAs() {
Class<?> clazz = String.class;
Class<?> clazz2 = Character.class;
System.out.println(clazz);
System.out.println(clazz2);
assertThat(clazz).isNotSameAs(clazz2);
Class<?> intClazz = Integer.class;
Class<?> intClazz2 = Double.class;
System.out.println(intClazz);
System.out.println(intClazz2);
assertThat(intClazz).isNotSameAs(intClazz2);
}
}
心得分享
AssertJ Class Functions in Java 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,善用 AssertJ Class Methods in Java 將有助於驗證效率的提升。