Fix various tests

libraries/tools/binary-compatibility-validator/build.gradle

@@ -40,4 +40,10 @@ test {
     systemProperty 'overwrite.output', System.getProperty("overwrite.output", "false")
     systemProperty 'kotlinVersion', project.version
     jvmArgs '-ea'
+
+    ignoreFailures = System.getenv("kotlin_build_ignore_test_failures") == 'yes'
+    environment("PROJECT_CLASSES_DIRS", sourceSets.test.output.classesDirs.asPath)
+    environment("PROJECT_BUILD_DIR", buildDir)
+
+    workingDir = projectDir
 }

libraries/tools/binary-compatibility-validator/src/test/kotlin/org.jetbrains.kotlin.tools.tests/CasesPublicAPITest.kt

@@ -8,8 +8,13 @@ import java.io.File
 class CasesPublicAPITest {
 
     companion object {
-        val visibilities by lazy { readKotlinVisibilities(File("build/cases-declarations.json")) }
-        val baseClassPath = File("build/classes/test/cases").absoluteFile
+        val visibilities by lazy { readKotlinVisibilities(File(System.getenv("PROJECT_BUILD_DIR") ?: "build", "cases-declarations.json")) }
+        val baseClassPaths: List<File> =
+                (System.getenv("PROJECT_CLASSES_DIRS")?.let { it.split(File.pathSeparator) }
+                ?: listOf("build/classes/kotlin/test/cases", "build/classes/java/test/cases"))
+                        .mapNotNull { File(it, "cases").canonicalFile.takeIf { it.isDirectory } }
+                        .takeIf { it.isNotEmpty() }
+                ?: throw IllegalStateException("Unable to get classes output dirs, set PROJECT_CLASSES_DIRS environment variable")
         val baseOutputPath = File("src/test/kotlin/cases")
     }
 
@@ -42,8 +47,8 @@ class CasesPublicAPITest {
 
 
     private fun snapshotAPIAndCompare(testClassRelativePath: String) {
-        val testClassPath = baseClassPath.resolve(testClassRelativePath)
-        val testClasses = testClassPath.listFiles() ?: throw IllegalStateException("Cannot list files in $testClassPath")
+        val testClassPaths = baseClassPaths.map { it.resolve(testClassRelativePath) }
+        val testClasses = testClassPaths.flatMap { it.listFiles()?.asIterable() ?: emptyList() }
         val testClassStreams = testClasses.asSequence().filter { it.name.endsWith(".class") }.map { it.inputStream() }
 
         val api = getBinaryAPI(testClassStreams, visibilities).filterOutNonPublic()