Framework for integration tests

Author: ting-yuan

api/build.gradle.kts

@@ -36,4 +36,10 @@ publishing {
             }
         }
     }
+    repositories {
+        maven {
+            name = "test"
+            url = uri("${rootProject.buildDir}/repos/test")
+        }
+    }
 }

gradle-plugin/build.gradle.kts

@@ -64,4 +64,10 @@ publishing {
             }
         }
     }
+    repositories {
+        maven {
+            name = "test"
+            url = uri("${rootProject.buildDir}/repos/test")
+        }
+    }
 }

integration-tests/build.gradle.kts

@@ -0,0 +1,20 @@
+val junitVersion: String by project
+val kotlinBaseVersion: String by project
+
+plugins {
+    kotlin("jvm")
+}
+
+dependencies {
+    testImplementation("junit:junit:$junitVersion")
+    testImplementation(gradleTestKit())
+}
+
+tasks.test {
+    systemProperty("kotlinVersion", kotlinBaseVersion)
+    systemProperty("kspVersion", version)
+    systemProperty("testRepo", File(rootProject.buildDir, "repos/test").absolutePath)
+    dependsOn(":api:publishAllPublicationsToTestRepository")
+    dependsOn(":gradle-plugin:publishAllPublicationsToTestRepository")
+    dependsOn(":symbol-processing:publishAllPublicationsToTestRepository")
+}

integration-tests/src/test/kotlin/com/google/devtools/ksp/test/Artifact.kt

@@ -0,0 +1,24 @@
+import org.junit.*
+import java.io.File
+import java.util.zip.ZipFile
+
+// A snapshot of the digest of output jar.
+class Artifact(file: File) {
+    private fun getCRCs(file: File): Map<String, Long> {
+        Assert.assertTrue(file.exists())
+        return ZipFile(file).use {
+            it.entries().asSequence().map {
+                it.name to it.crc
+            }.toMap()
+        }
+    }
+
+    val crcs: Map<String, Long> = getCRCs(file)
+
+    override fun equals(other: Any?): Boolean {
+        if (other !is Artifact)
+            return false
+
+        return crcs == other.crcs
+    }
+}

integration-tests/src/test/kotlin/com/google/devtools/ksp/test/TemporaryTestProject.kt

@@ -0,0 +1,26 @@
+package com.google.devtools.ksp.test
+
+import org.junit.rules.TemporaryFolder
+import java.io.File
+
+class TemporaryTestProject(projectName: String) : TemporaryFolder() {
+    private val testProjectSrc = File("src/test/resources", projectName)
+
+    override fun before() {
+        super.before()
+
+        testProjectSrc.copyRecursively(root)
+
+        val kotlinVersion = System.getProperty("kotlinVersion")
+        val kspVersion = System.getProperty("kspVersion")
+        val testRepo = System.getProperty("testRepo")
+        val gradleProperties = File(root, "gradle.properties")
+        gradleProperties.appendText("\nkotlinVersion=$kotlinVersion")
+        gradleProperties.appendText("\nkspVersion=$kspVersion")
+        gradleProperties.appendText("\ntestRepo=$testRepo")
+    }
+
+    fun restore(file: String) {
+        File(testProjectSrc, file).copyTo(File(root, file), true)
+    }
+}

settings.gradle.kts

@@ -9,6 +9,7 @@ include("api")
 include("gradle-plugin")
 include("compiler-plugin")
 include("symbol-processing")
+include("integration-tests")
 
 val kotlinProjectPath: String? by settings
 if (kotlinProjectPath != null) {

symbol-processing/build.gradle.kts

@@ -69,4 +69,10 @@ publishing {
             }
         }
     }
+    repositories {
+        maven {
+            name = "test"
+            url = uri("${rootProject.buildDir}/repos/test")
+        }
+    }
 }