Table of Contents
ToggleTesting with AssertJ Class in Java
介紹 hasDeclaredFields 、 hasDeclaredMethods 、 hasPublicFields 、 hasPublicMethods 等方法,提供驗證類別條件判斷等方法,編寫的測試程式使用流暢的斷言語句,通常與 JUnit 測試一起使用, AssertJ 斷言的基本方法是 assertThat 方法,使用 Testing Java AssertJ Class 流式斷言,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
| +- TestingAssertJClassTest.java
單元測試
Java AssertJ Class Testing 斷言類別的主要目的是取得類別以進行斷言。
Fruit
建立 Fruit 類別,覆寫 toString ,定義屬性和方法,用來建立一個物件。
@NoArgsConstructor
@Getter
@Setter
@Builder
public static class Fruit {
public String name;
public double quantity;
private int type;
public Fruit(String name, double quantity, int type) {
this.name = name;
this.quantity = quantity;
this.type = type;
}
public String toString() {
ToStringBuilder builder = new ToStringBuilder(this, ToStringStyle.JSON_STYLE);
builder.appendSuper(super.toString());
builder.append("name", name);
builder.append("quantity", quantity);
builder.append("type", type);
return builder.toString();
}
private void toFormat() {
}
}
hasDeclaredFields
Java AssertJ Class Testing 驗證類別是否有指定的宣告欄位,若不成立,則會拋出 AssertionError 。
@Test
public void hasDeclaredFields() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasDeclaredFields("value");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasDeclaredFields("name", "quantity");
}
class java.lang.String
class org.ruoxue.spring_boot_168.test.assertj.clazz.TestingAssertJClassTest$Fruit
hasDeclaredMethods
Java AssertJ Class Testing 驗證類別是否有指定的宣告方法,若不成立,則會拋出 AssertionError 。
@Test
public void hasDeclaredMethods() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasDeclaredMethods("concat", "nonSyncContentEquals");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasDeclaredMethods("getName", "toFormat");
}
class java.lang.String
class org.ruoxue.spring_boot_168.test.assertj.clazz.TestingAssertJClassTest$Fruit
hasPublicFields
Java AssertJ Class Testing 驗證類別是否有指定的公用宣告欄位,若不成立,則會拋出 AssertionError 。
@Test
public void hasPublicFields() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasPublicFields("CASE_INSENSITIVE_ORDER");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasPublicFields("name");
}
class java.lang.String
class org.ruoxue.spring_boot_168.test.assertj.clazz.TestingAssertJClassTest$Fruit
hasPublicMethods
Java AssertJ Class Testing 驗證類別是否有指定的公用宣告方法,若不成立,則會拋出 AssertionError 。
@Test
public void hasPublicMethods() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasPublicMethods("concat");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasPublicMethods("getName");
}
class java.lang.String
class org.ruoxue.spring_boot_168.test.assertj.clazz.TestingAssertJClassTest$Fruit
hasOnlyDeclaredFields
Java Testing AssertJ Class 驗證類別是否有所有的宣告欄位,順序不需要保持一致,若不成立,則會拋出 AssertionError 。
@Test
public void hasOnlyDeclaredFields() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasOnlyDeclaredFields("value", "hash", "serialVersionUID", "serialPersistentFields",
"CASE_INSENSITIVE_ORDER").hasOnlyDeclaredFields("hash", "value", "serialVersionUID",
"serialPersistentFields", "CASE_INSENSITIVE_ORDER");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasOnlyDeclaredFields("name", "quantity", "type").hasOnlyDeclaredFields("quantity", "name",
"type");
}
class java.lang.String
class org.ruoxue.spring_boot_168.test.assertj.clazz.TestingAssertJClassTest$Fruit
hasOnlyPublicFields
Java Testing AssertJ Class 驗證類別是否有所有的宣告方法,順序不需要保持一致,若不成立,則會拋出 AssertionError 。
@Test
public void hasOnlyPublicFields() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasOnlyPublicFields("CASE_INSENSITIVE_ORDER");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasOnlyPublicFields("name", "quantity").hasOnlyPublicFields("quantity", "name");
}
class java.lang.String
class org.ruoxue.spring_boot_168.test.assertj.clazz.TestingAssertJClassTest$Fruit
TestingAssertJClassTest.java
Java Testing AssertJ Class 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.assertThat;
import org.apache.commons.lang3.builder.ToStringBuilder;
import org.apache.commons.lang3.builder.ToStringStyle;
import org.junit.jupiter.api.Test;
import lombok.Builder;
import lombok.Getter;
import lombok.NoArgsConstructor;
import lombok.Setter;
public class TestingAssertJClassTest {
@NoArgsConstructor
@Getter
@Setter
@Builder
public static class Fruit {
public String name;
public double quantity;
private int type;
public Fruit(String name, double quantity, int type) {
this.name = name;
this.quantity = quantity;
this.type = type;
}
public String toString() {
ToStringBuilder builder = new ToStringBuilder(this, ToStringStyle.JSON_STYLE);
builder.appendSuper(super.toString());
builder.append("name", name);
builder.append("quantity", quantity);
builder.append("type", type);
return builder.toString();
}
private void toFormat() {
}
}
@Test
public void hasDeclaredFields() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasDeclaredFields("value");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasDeclaredFields("name", "quantity");
}
@Test
public void hasDeclaredMethods() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasDeclaredMethods("concat", "nonSyncContentEquals");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasDeclaredMethods("getName", "toFormat");
}
@Test
public void hasPublicFields() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasPublicFields("CASE_INSENSITIVE_ORDER");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasPublicFields("name");
}
@Test
public void hasPublicMethods() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasPublicMethods("concat");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasPublicMethods("getName");
}
@Test
public void hasOnlyDeclaredFields() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasOnlyDeclaredFields("value", "hash", "serialVersionUID", "serialPersistentFields",
"CASE_INSENSITIVE_ORDER").hasOnlyDeclaredFields("hash", "value", "serialVersionUID",
"serialPersistentFields", "CASE_INSENSITIVE_ORDER");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasOnlyDeclaredFields("name", "quantity", "type").hasOnlyDeclaredFields("quantity", "name",
"type");
}
@Test
public void hasOnlyPublicFields() {
Class<?> clazz = String.class;
System.out.println(clazz);
assertThat(clazz).hasOnlyPublicFields("CASE_INSENSITIVE_ORDER");
Class<?> clazz2 = Fruit.class;
System.out.println(clazz2);
assertThat(clazz2).hasOnlyPublicFields("name", "quantity").hasOnlyPublicFields("quantity", "name");
}
}
心得分享
AssertJ Class Java Testing 除了提供流式判斷,還針對 Class 做特殊判斷,在許多測試驗證的場景,讓開發者使用更流暢的驗證,不需要再寫迴圈,善用 Java Testing AssertJ Class 將有助於驗證效率的提升。