Fixed tests in buildSrc folder. (#10021)

* Fixed CallSiteInstrumentationPluginTest by fixing test `build.gradle` and copy jar file to test build path.
* Fixed InstrumentPluginTest by addin missing `instrumentPluginClasspath` config to the test `build.gradle`
* Introduced `check_build_src` job to run test in `buildSrc` folder on CI.

Author: AlexeyKuznetsov-DD

.gitlab-ci.yml

@@ -435,6 +435,11 @@ test_published_artifacts:
       - scheduler_failure
       - data_integrity_failure
 
+check_build_src:
+  extends: .check_job
+  variables:
+    GRADLE_TARGET: ":buildSrc:build"
+
 check_base:
   extends: .check_job
   variables:

buildSrc/src/main/kotlin/datadog/gradle/plugin/csi/CallSiteInstrumentationExtension.kt

@@ -50,6 +50,7 @@ abstract class CallSiteInstrumentationExtension @Inject constructor(
    */
   val reporters: ListProperty<String> = objectFactory.listProperty<String>().convention(
     listOf(
+      CALL_SITE_CONSOLE_REPORTER,
       CALL_SITE_ERROR_CONSOLE_REPORTER
     )
   )

buildSrc/src/test/groovy/CallSiteInstrumentationPluginTest.groovy

@@ -1,3 +1,4 @@
+import java.nio.file.Files
 import org.gradle.testkit.runner.BuildResult
 import org.gradle.testkit.runner.GradleRunner
 import org.gradle.testkit.runner.UnexpectedBuildFailure
@@ -10,15 +11,14 @@ class CallSiteInstrumentationPluginTest extends Specification {
     plugins {
       id 'java'
       id 'call-site-instrumentation'
-      id 'com.diffplug.spotless' version '6.13.0'
     }
     
     sourceCompatibility = JavaVersion.VERSION_1_8
     targetCompatibility = JavaVersion.VERSION_1_8
 
     csi {
       suffix = 'CallSite'
-      targetFolder = 'csi'
+      targetFolder = project.layout.buildDirectory.dir('csi')
       rootFolder = file('$$ROOT_FOLDER$$')
     }
     
@@ -89,7 +89,15 @@ class CallSiteInstrumentationPluginTest extends Specification {
 
   private static void createGradleProject(final File buildDir, final String gradleFile, final String advice) {
     final projectFolder = new File(System.getProperty('user.dir')).parentFile
-    final callSiteJar = resolve(projectFolder, 'buildSrc', 'call-site-instrumentation-plugin')
+    final callSiteJar = resolve(projectFolder, 'buildSrc', 'call-site-instrumentation-plugin', 'build', 'libs', 'call-site-instrumentation-plugin-all.jar')
+    final testCallSiteJarDir = resolve(buildDir, 'buildSrc', 'call-site-instrumentation-plugin', 'build', 'libs')
+    testCallSiteJarDir.mkdirs()
+
+    Files.copy(
+        callSiteJar.toPath(),
+        testCallSiteJarDir.toPath().resolve(callSiteJar.name)
+    )
+
     final gradleFileContent = gradleFile.replace('$$ROOT_FOLDER$$', projectFolder.toString().replace("\\","\\\\"))
 
     final buildGradle = resolve(buildDir, 'build.gradle')

buildSrc/src/test/groovy/InstrumentPluginTest.groovy

@@ -26,7 +26,11 @@ class InstrumentPluginTest extends Specification {
       compileOnly group: 'net.bytebuddy', name: 'byte-buddy', version: '1.18.1' // just to build TestPlugin
     }
 
-    apply plugin: 'instrument'
+    configurations {
+      instrumentPluginClasspath {
+        canBeResolved = true
+      }
+    }
 
     instrument.plugins = [
       'TestPlugin'