Spring-Test with JUnit 4, And JUnit 5

Gradle

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib"
    implementation "org.springframework:spring-context:5.2.0.RELEASE"

    testImplementation 'junit:junit:4.12'        <----------- JUnit 4
    testImplementation "org.springframework:spring-test:5.2.0.RELEASE"    <------ Spring-Test
    testRuntimeOnly("org.junit.vintage:junit-vintage-engine:5.7.1")      <------ JUnit Engine
}

Start a Spring Test

import pkg.JavaConfig
import org.junit.Test
import org.junit.runner.RunWith
import org.springframework.beans.factory.annotation.Autowired
import org.springframework.context.ApplicationContext
import org.springframework.test.context.ContextConfiguration
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner

@RunWith(SpringJUnit4ClassRunner::class)
@ContextConfiguration(classes = [JavaConfig::class])
class ApplicationContextTest {
    @Autowired lateinit var ctx: ApplicationContext
    @Test
    fun testApplicationContext() {
        // TODO
    }
}

also:

class ApplicationContextTest {
    @Autowired val ctx: ApplicationContext? = null
    @Test
    fun testApplicationContext() {
        assert(ctx !== null)
    }
}

参数化测试

package headfirst_junit

import org.junit.Assert.assertEquals
import org.junit.Test
import org.junit.runner.RunWith
import org.junit.runners.Parameterized
import java.util.regex.Pattern

object EmailIdUtility {
    fun isValid(email: String): Boolean {
        val regex =
            "^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$"
        val pattern = Pattern.compile(regex)
        val m = pattern.matcher(email)
        return m.matches()
    }
}

@RunWith(value = Parameterized::class)
class EmailIdValidatorTest(
    private val email: String,
    private val expected: Boolean)
{
    @Test
    fun testIsValidEmailId() {
        val actual = EmailIdUtility.isValid(email)
        assertEquals(expected, actual)
    }

    companion object {
        @JvmStatic
        @Parameterized.Parameters(name = "{index}: isValid({0})={1}")
        fun data(): Any {
            return arrayOf(
                arrayOf("mary@testdomain.com", true),
                arrayOf("mary.smith@testdomain.com", true),
                arrayOf("mary_smith123@testdomain.com", true),
                arrayOf("mary@testdomaindotcom", false),
                arrayOf("mary-smith@testdomain", false),
                arrayOf("testdomain.com", false)
            )
        }
    }
}

迁移到JUnit 5

Gradle

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib"
    implementation "org.springframework:spring-context:5.2.0.RELEASE"

    testImplementation "org.springframework:spring-test:5.2.0.RELEASE"    <------ Spring-Test
    testImplementation 'org.junit.jupiter:junit-jupiter-api:5.7.1'        <----------- JUnit 5
    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.7.1'
}

迁移技巧By Gradle：https://junit.org/junit5/docs/current/user-guide/#migrating-from-junit4-tips

• @RunWith不复存在; 被@ExtendWith取代。

迁移技巧By Spring社区：https://www.baeldung.com/junit-5-migration

• SpringJUnit4ClassRunner -> SpringExtension

@RunWith(SpringJUnit4ClassRunner::class)
@ContextConfiguration(["/app-config.xml", "/test-data-access-config.xml"])
public class SpringExtensionTest {
    /*...*/
}

现在，在JUnit 5中，它是一个简单的扩展：

@ExtendWith(SpringExtension::class)
@ContextConfiguration(["/app-config.xml", "/test-data-access-config.xml"])
public class SpringExtensionTest {
    /*...*/
}