Createa a build_00_utilities project containing testing helpers, including the ConsoleTest abstract class.

00_Utilities/jvmTestUtils/kotlin/test/ConsoleTest.kt

@@ -0,0 +1,37 @@
+package com.pcholt.console.testutils
+
+import com.google.common.truth.Truth
+import org.junit.Rule
+import org.junit.contrib.java.lang.system.SystemOutRule
+import org.junit.contrib.java.lang.system.TextFromStandardInputStream
+
+abstract class ConsoleTest {
+    @get:Rule
+    val inputRule = TextFromStandardInputStream.emptyStandardInputStream()
+
+    @get:Rule
+    val systemOutRule = SystemOutRule().enableLog()
+
+    val regexInputCommand = "\\{(.*)}".toRegex()
+
+    fun assertConversation(conversation: String, runMain: () -> Unit) {
+
+        inputRule.provideLines(*regexInputCommand
+            .findAll(conversation)
+            .map { it.groupValues[1] }
+            .toList().toTypedArray())
+
+        runMain()
+
+        Truth.assertThat(
+            systemOutRule.log.trimWhiteSpace()
+        )
+            .isEqualTo(
+                regexInputCommand
+                    .replace(conversation, "").trimWhiteSpace()
+            )
+    }
+
+    private fun String.trimWhiteSpace() =
+        replace("[\\s]+".toRegex(), " ")
+}