Display only failed and skipped tests by default (#298)

Passed tests are not displayed by default. Use the property 
`-PverboseTests=ON` to display them.

Author: dpad85

.github/workflows/test.yml

@@ -72,7 +72,7 @@ jobs:
       # 4 - tests
       - name: Check with integration
         if: matrix.os == 'ubuntu-latest'
-        run: ./gradlew check -PintegrationTests=include
+        run: ./gradlew check -PintegrationTests=include -PverboseTests=ON
       - name: Check without integration
         if: matrix.os != 'ubuntu-latest'
-        run: ./gradlew check
+        run: ./gradlew check -PverboseTests=ON

build.gradle.kts

@@ -160,11 +160,22 @@ afterEvaluate {
 }
 
 afterEvaluate {
-    tasks.withType<AbstractTestTask>() {
+    tasks.withType<AbstractTestTask> {
+        val verboseTests = project.findProperty("verboseTests") == "ON"
         testLogging {
-            events("passed", "skipped", "failed", "standard_out", "standard_error")
             showExceptions = true
             showStackTraces = true
+            if (verboseTests) {
+                events("passed", "skipped", "failed")
+                showStandardStreams = true
+            } else {
+                events("skipped", "failed")
+            }
+            afterSuite(KotlinClosure2({ desc: TestDescriptor, result: TestResult ->
+                if (desc.parent == null && result.failedTestCount == 0L) {
+                    println("${result.testCount} tests completed: ${result.successfulTestCount} passed, ${result.failedTestCount} failed, ${result.skippedTestCount} skipped")
+                }
+            }))
         }
     }
     tasks.withType<org.jetbrains.kotlin.gradle.targets.jvm.tasks.KotlinJvmTest> {