Fix 'test' dependencies

The previously used approach of

project(':smack-core').sourceSets.test.runtimeClasspath

caused the 'eclipse' target to produce duplicate classpath entries in
.classpath when run with Gradle >= 2.6. It also relied on Gradle
internals.

Instead we now use

project(path: ":smack-core", configuration: "testRuntime")
project(path: ":smack-core", configuration: "archives")

to be able to use test classes from other subprojects (usually
smack-core) in e.g. smack-extensions. The 'archives' configuration
includes the test jar.

See also https://discuss.gradle.org/t/11784

Thanks to Lari Hotari for helping with this issue.

build.gradle

@@ -274,7 +274,7 @@ subprojects {
 		classifier = 'javadoc'
 		from javadoc.destinationDir
 	}
-	task testJar(type: Jar) {
+	task testJar(type: Jar, dependsOn: testClasses) {
 		classifier = 'tests'
 		from sourceSets.test.output
 	}
@@ -293,6 +293,10 @@ subprojects {
 		}
 	}
 
+	configurations {
+		archivesOutput.extendsFrom (testCompile)
+	}
+
 	artifacts {
 		archives sourcesJar
 		archives javadocJar

smack-debug-slf4j/build.gradle

@@ -6,5 +6,5 @@ Connect your favourite slf4j backend of choice to get output inside of it"""
 dependencies {
     compile project(':smack-core')
     compile 'org.slf4j:slf4j-api:[1.7,1.8)'
-    testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+    testCompile project(path: ":smack-core", configuration: "testRuntime")
 }

smack-debug/build.gradle

@@ -4,5 +4,5 @@ Inspect the exchanged XMPP stanzas."""
 
 dependencies {
 	compile project(':smack-core')
-	testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+	testCompile project(path: ":smack-core", configuration: "testRuntime")
 }

smack-experimental/build.gradle

@@ -7,5 +7,6 @@ between patch versions."""
 dependencies {
 	compile project(':smack-core')
 	compile project(':smack-extensions')
-	testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+	testCompile project(path: ":smack-core", configuration: "testRuntime")
+	testCompile project(path: ":smack-core", configuration: "archives")
 }

smack-extensions/build.gradle

@@ -10,5 +10,6 @@ dependencies {
 	// Some implementations need APIs provided by smack-im,
 	// e.g. message delivery receipts the roster
 	compile project(':smack-im')
-	testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+	testCompile project(path: ":smack-core", configuration: "testRuntime")
+	testCompile project(path: ":smack-core", configuration: "archives")
 }

smack-im/build.gradle

@@ -7,5 +7,6 @@ Roster, Chat and other functionality."""
 // sourceSet.test of the core subproject
 dependencies {
 	compile project(':smack-core')
-	testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+	testCompile project(path: ":smack-core", configuration: "testRuntime")
+	testCompile project(path: ":smack-core", configuration: "archives")
 }

smack-jingle-old/build.gradle

@@ -7,5 +7,5 @@ dependencies {
 	compile project(':smack-extensions')
 	compile 'javax.media:jmf:2.1.1e'
 	compile files('libs/jspeex-0.9.7-jfcom.jar', 'libs/jstun.jar', 'libs/Speex.jar')
-	testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+	testCompile project(path: ":smack-core", configuration: "testRuntime")
 }

smack-legacy/build.gradle

@@ -6,5 +6,5 @@ Usually XEPs in the state 'retracted', 'rejected', 'deprecated',
 dependencies {
 	compile project(':smack-core')
 	compile project(':smack-extensions')
-	testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+	testCompile project(path: ":smack-core", configuration: "testRuntime")
 }

smack-sasl-javax/build.gradle

@@ -4,5 +4,6 @@ Use javax.security.sasl for SASL."""
 
 dependencies {
 	compile project(path: ':smack-core')
-	testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+	testCompile project(path: ":smack-core", configuration: "testRuntime")
+	testCompile project(path: ":smack-core", configuration: "archives")
 }

smack-sasl-provided/build.gradle

@@ -4,5 +4,6 @@ Use Smack provided code for SASL."""
 
 dependencies {
 	compile project(path: ':smack-core')
-	testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+	testCompile project(path: ":smack-core", configuration: "testRuntime")
+	testCompile project(path: ":smack-core", configuration: "archives")
 }

smack-tcp/build.gradle

@@ -3,5 +3,5 @@ Smack for standard XMPP connections over TCP."""
 
 dependencies {
 	compile project(':smack-core')
-	testCompile project(':smack-core').sourceSets.test.runtimeClasspath
+	testCompile project(path: ":smack-core", configuration: "testRuntime")
 }