Improve logging dependencies for tests

build.gradle

@@ -57,7 +57,7 @@ configure(allprojects) { project ->
 	ext.rxjavaVersion        = "1.3.4"
 	ext.rxjavaAdapterVersion = "1.2.1"
 	ext.rxjava2Version       = "2.1.8"
-	ext.slf4jVersion         = "1.7.25"
+	ext.slf4jVersion         = "1.7.25"	// spring-jcl + consistent 3rd party deps
 	ext.tiles3Version        = "3.0.8"
 	ext.tomcatVersion        = "8.5.27"
 	ext.undertowVersion      = "1.4.22.Final"
@@ -89,6 +89,15 @@ configure(allprojects) { project ->
 	configurations.all {
 		// Check for updates every build
 		resolutionStrategy.cacheChangingModulesFor 0, 'seconds'
+
+		// Consistent slf4j version (e.g. clashes between slf4j versions)
+		resolutionStrategy.eachDependency { DependencyResolveDetails details ->
+			if (details.requested.group == 'org.slf4j') {
+				details.useVersion slf4jVersion
+			}
+		}
+
+		exclude group: "org.slf4j", module: "jcl-over-slf4j"
 	}
 
 	def commonCompilerArgs =
@@ -149,6 +158,8 @@ configure(allprojects) { project ->
 		testCompile("org.hamcrest:hamcrest-all:1.3")
 		testCompile("org.xmlunit:xmlunit-matchers:2.3.0")
 		testRuntime("org.apache.logging.log4j:log4j-core:${log4jVersion}")
+		testRuntime("org.apache.logging.log4j:log4j-slf4j-impl:${log4jVersion}")
+		testRuntime("org.apache.logging.log4j:log4j-jul:${log4jVersion}")
         // JSR-305 only used for non-required meta-annotations
 		compileOnly("com.google.code.findbugs:jsr305:3.0.2")
 		testCompileOnly("com.google.code.findbugs:jsr305:3.0.2")

spring-context-support/spring-context-support.gradle

@@ -16,7 +16,6 @@ dependencies {
 	optional("org.freemarker:freemarker:${freemarkerVersion}")
 	testCompile(project(":spring-context"))
 	testCompile("org.hsqldb:hsqldb:${hsqldbVersion}")
-	testCompile("org.slf4j:slf4j-api:${slf4jVersion}")
 	testCompile("org.hibernate:hibernate-validator:6.0.7.Final")
 	testRuntime("org.ehcache:jcache:1.0.1")
 	testRuntime("org.ehcache:ehcache:3.4.0")

spring-context/spring-context.gradle

@@ -24,7 +24,6 @@ dependencies {
 	optional("org.jetbrains.kotlin:kotlin-reflect:${kotlinVersion}")
 	optional("org.jetbrains.kotlin:kotlin-stdlib:${kotlinVersion}")
 	testCompile("org.apache.commons:commons-pool2:2.5.0")
-	testCompile("org.slf4j:slf4j-api:${slf4jVersion}")
 	testCompile("javax.inject:javax.inject-tck:1")
 	testRuntime("javax.xml.bind:jaxb-api:2.3.0")
 	testRuntime("org.glassfish:javax.el:3.0.1-b08")

spring-test/spring-test.gradle

@@ -74,12 +74,8 @@ dependencies {
 	testCompile("com.thoughtworks.xstream:xstream:1.4.10")
 	testCompile("com.rometools:rome:1.9.0")
 	testCompile("org.apache.tiles:tiles-api:${tiles3Version}")
-	testCompile("org.apache.tiles:tiles-core:${tiles3Version}") {
-		exclude group: "org.slf4j", module: "jcl-over-slf4j"
-	}
-	testCompile("org.apache.tiles:tiles-servlet:${tiles3Version}") {
-		exclude group: "org.slf4j", module: "jcl-over-slf4j"
-	}
+	testCompile("org.apache.tiles:tiles-core:${tiles3Version}")
+	testCompile("org.apache.tiles:tiles-servlet:${tiles3Version}")
 	testCompile("org.hsqldb:hsqldb:${hsqldbVersion}")
 	testCompile("org.apache.httpcomponents:httpclient:4.5.5") {
 		exclude group: "commons-logging", module: "commons-logging"
@@ -91,7 +87,6 @@ dependencies {
 	testRuntime("org.junit.platform:junit-platform-launcher:${junitPlatformVersion}")
 	testRuntime("org.junit.vintage:junit-vintage-engine:${junitVintageVersion}")
 	testCompile('de.bechte.junit:junit-hierarchicalcontextrunner:4.12.1')
-	testRuntime("org.apache.logging.log4j:log4j-jul:${log4jVersion}")  // Java Util Logging for JUnit 5
 	testRuntime("javax.annotation:javax.annotation-api:1.3.1")
 	testRuntime("org.glassfish:javax.el:3.0.1-b08")
 	testRuntime("com.sun.xml.bind:jaxb-core:2.3.0")

spring-webmvc/spring-webmvc.gradle

@@ -36,20 +36,11 @@ dependencies {
 	optional("com.fasterxml.jackson.dataformat:jackson-dataformat-smile:${jackson2Version}")
 	optional("com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:${jackson2Version}")
 	optional("org.apache.tiles:tiles-api:${tiles3Version}")
-	optional("org.apache.tiles:tiles-core:${tiles3Version}") {
-		exclude group: "org.slf4j", module: "jcl-over-slf4j"
-	}
-	optional("org.apache.tiles:tiles-servlet:${tiles3Version}") {
-		exclude group: "org.slf4j", module: "jcl-over-slf4j"
-	}
-	optional("org.apache.tiles:tiles-jsp:${tiles3Version}") {
-		exclude group: "org.slf4j", module: "jcl-over-slf4j"
-	}
-	optional("org.apache.tiles:tiles-el:${tiles3Version}") {
-		exclude group: "org.slf4j", module: "jcl-over-slf4j"
-	}
+	optional("org.apache.tiles:tiles-core:${tiles3Version}")
+	optional("org.apache.tiles:tiles-servlet:${tiles3Version}")
+	optional("org.apache.tiles:tiles-jsp:${tiles3Version}")
+	optional("org.apache.tiles:tiles-el:${tiles3Version}")
 	optional("org.apache.tiles:tiles-extras:${tiles3Version}") {
-		exclude group: "org.slf4j", module: "jcl-over-slf4j"
 		exclude group: "org.springframework", module: "spring-web"
 	}
 	optional("org.codehaus.groovy:groovy-all:${groovyVersion}")