Add Kotlin-based display name test

Issue #1836

Author: sormuras

junit-jupiter-params/src/test/kotlin/org/junit/jupiter/params/aggregator/DisplayNameTests.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015-2019 the original author or authors.
+ *
+ * All rights reserved. This program and the accompanying materials are
+ * made available under the terms of the Eclipse Public License v2.0 which
+ * accompanies this distribution and is available at
+ *
+ * http://www.eclipse.org/legal/epl-v20.html
+ */
+@file:Suppress("unused")
+
+package org.junit.jupiter.params.aggregator
+
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.TestInfo
+import org.junit.jupiter.params.ParameterizedTest
+import org.junit.jupiter.params.provider.MethodSource
+
+// https://github.com/junit-team/junit5/issues/1836
+object DisplayNameTests {
+    @JvmStatic
+    fun data() = arrayOf(
+            arrayOf("A", 1),
+            arrayOf("B", 2),
+            arrayOf("C", 3)
+    )
+
+    @ParameterizedTest
+    @MethodSource("data")
+    fun test(char: String, number: Int, info: TestInfo) {
+        assertEquals("[$number] $char, $number", info.displayName)
+    }
+}