running geb test with gradle 2.3 - HashMap$Entry exception - groovy

Question

I am trying to run geb tests through gradle. I've these installed
java version "1.8.0_31"
Groovy Version: 2.4.0
Gradle 2.3
But i am getting this error when running the test.
Exception in thread "main" java.lang.NoClassDefFoundError: java/util/HashMap$Ent
ry
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2693)
Running a simple groovy script with above setup and the below Build.gradle is fine.
Build.gradle looks like this:
buildscript {
repositories {
jcenter()
}
}
apply plugin: 'java'
apply plugin: 'groovy'
repositories {
jcenter()
mavenCentral()
}
dependencies {
def seleniumVersion = "2.45.0"
def phantomJsVersion = '1.1.0'
// selenium drivers
compile "org.seleniumhq.selenium:selenium-firefox-driver:$seleniumVersion"
compile "org.seleniumhq.selenium:selenium-support:$seleniumVersion"
compile("com.github.detro.ghostdriver:phantomjsdriver:$phantomJsVersion") {
transitive = false
}
// geb
compile 'org.codehaus.geb:geb-core:0.7.2'
compile 'org.codehaus.geb:geb-spock:0.7.2'
// spock
compile 'org.spockframework:spock-core:0.6-groovy-1.8'
//junit
testCompile group: 'junit', name: 'junit', version: '4.7'
}
task runGebScript (dependsOn: 'classes', type: JavaExec) {
main = 'test'
classpath = sourceSets.main.runtimeClasspath
}
Can someone please help.

Answer 1

According to Gradle dependency report for the build you included, the Groovy version used for testCompile configuration is 1.8.5. Only groovy 2.x is JDK8 compatible. I would do as ataylor suggests and bump Spock version. If you use 1.0-groovy-2.4 then you'll be using Groovy 2.4.1. Also, I would suggest updating version of Geb while you're at it - the latest is 0.10.0. Your dependency versions are way out of date.

Answer 2

Something is trying to use the inner class HashMap.Entry, which no longer exists in Java 8. It's difficult to tell where without a complete stack trace.
However, you're using this version of spock: org.spockframework:spock-core:0.6-groovy-1.8. That version is not compatible with groovy 2.0+. Try updating the dependency to org.spockframework:spock-core:1.0-groovy-2.4.