Intellij 插件开发和 Kotlin 测试

Question

I'm trying to develop an intellij plugin written in kotlin - I'm struggling to find any examples of unit tests for the plugin that are written in kotlin, or even java ones with test data that are written using gradle rather than the older dev SDK. Is anyone able to point to a demo application with unit tests? (For inspections, ideally)

Answer 1

Some theory:

• Testing in Gradle

• Add test classes to a Gradle project

• Testing Gradle plugins

• Running JUnit5 tests with Gradle

• Unit testing in Kotlin and kotlin.test library

• Using Gradle with Kotlin

Code samples:

• Article on running Kotlin Unit tests with Gradle

• A tutorial on building apps with Spring Boot and Kotlin with a section on testing with Junit5

• Custom Gradle plugin example

Hope this helps.

Answer 2

These come out of the box now if you use the template: https://github.com/JetBrains/intellij-platform-plugin-template

Here's one of the tests in Kotlin:

package org.jetbrains.plugins.template

import com.intellij.ide.highlighter.XmlFileType
import com.intellij.psi.xml.XmlFile
import com.intellij.testFramework.TestDataPath
import com.intellij.testFramework.fixtures.BasePlatformTestCase
import com.intellij.util.PsiErrorElementUtil

class MyPluginTest : BasePlatformTestCase() {

    fun testXMLFile() {
        val psiFile = myFixture.configureByText(XmlFileType.INSTANCE, "<foo>bar</foo>")
        val xmlFile = assertInstanceOf(psiFile, XmlFile::class.java)

        assertFalse(PsiErrorElementUtil.hasErrors(project, xmlFile.virtualFile))

        assertNotNull(xmlFile.rootTag)

        xmlFile.rootTag?.let {
            assertEquals("foo", it.name)
            assertEquals("bar", it.value.text)
        }
    }
}

The plugin documentation also provides more relevant info for testing: https://plugins.jetbrains.com/docs/intellij/writing-tests.html

Also, here are some unit tests written in Java for the JUnit IntelliJ plugin https://github.com/JetBrains/intellij-community/blob/master/plugins/junit/test/com/intellij/execution/junit/JUnitDetectionTest.java