bug presentation

Author: kastoestoramadus

config/src/test/scala/com/typesafe/config/impl/ConfigDefaultRenderingTest.scala

@@ -0,0 +1,41 @@
+package com.typesafe.config.impl
+
+import com.typesafe.config.{ ConfigFactory, ConfigParseOptions, ConfigRenderOptions }
+import org.junit.Test
+
+// Regression tests for rendering old behaviour compatibility
+class ConfigDefaultRenderingTest extends TestUtils {
+    private val parseOptions = ConfigParseOptions.defaults.setAllowMissing(true)
+    private val myDefaultRenderOptions = ConfigRenderOptions.defaults
+        .setJson(false)
+        .setOriginComments(false)
+        .setComments(true)
+        .setFormatted(true)
+
+    def formatHocon(
+        str: String): String =
+        ConfigFactory
+            .parseString(str, parseOptions)
+            .root
+            .render(
+                myDefaultRenderOptions)
+
+    @Test
+    def properArrayConcat(): Unit = {
+        val in =
+            """except: ${ex1} ${ex2}
+        |myEmpty: " "
+        |""".stripMargin
+        val result = formatHocon(in)
+
+        val expected =
+            """except = ${ex1} ${ex2}
+        |myEmpty = " "
+        |""".stripMargin
+
+        println(expected)
+        println(result)
+        checkEqualObjects(expected, result)
+    }
+
+}