display test results during testing

test/build.gradle

@@ -28,6 +28,35 @@ android.applicationVariants.all { variant ->
     tasks["compile${productFlavor}${buildType}UnitTestSources"].dependsOn(tasks["merge${productFlavor}${buildType}Assets"])
 }
 
+// display test progress http://stackoverflow.com/a/36130467/999458
+tasks.withType(Test) {
+    testLogging {
+        // set options for log level LIFECYCLE
+        events "passed", "skipped", "failed", "standardOut"
+        showExceptions true
+        exceptionFormat "full"
+        showCauses true
+        showStackTraces true
+
+        // set options for log level DEBUG and INFO
+        debug {
+            events "started", "passed", "skipped", "failed", "standardOut", "standardError"
+            exceptionFormat "full"
+        }
+        info.events = debug.events
+        info.exceptionFormat = debug.exceptionFormat
+
+        afterSuite { desc, result ->
+            if (!desc.parent) { // will match the outermost suite
+                def output = "Results: ${result.resultType} (${result.testCount} tests, ${result.successfulTestCount} successes, ${result.failedTestCount} failures, ${result.skippedTestCount} skipped)"
+                def startItem = '|  ', endItem = '  |'
+                def repeatLength = startItem.length() + output.length() + endItem.length()
+                println('\n' + ('-' * repeatLength) + '\n' + startItem + output + endItem + '\n' + ('-' * repeatLength))
+            }
+        }
+    }
+}
+
 dependencies {
     compile project(':library')
     testCompile 'org.slf4j:slf4j-simple:1.7.21'