Merge pull request #1319 from oforero/SCALA-724

SCALA-724: Code companion for the article.

Author: dominiqueplante

scala-core-modules/scala-core/src/main/scala-3/com/baeldung/scala/patternmatching/MultipleMatches.scala

@@ -0,0 +1,34 @@
+package com.baeldung.scala.patternmatching
+
+sealed trait Command
+case object Start extends Command
+case object Stop extends Command
+case object Report extends Command
+case class CustomCommand(cmd: String) extends Command
+
+def executeCommand(command: Command): String = command match {
+  case Start | CustomCommand("begin") =>
+    "System Starting."
+  case Stop | CustomCommand("halt") =>
+    "System Stopping."
+  case Report | CustomCommand("status") =>
+    "Generating Report."
+  case _ =>
+    "Unknown Command."
+}
+
+def httpResponse(response: Int): String = response match {
+  case 200 | 201 | 202 => "Success"
+  case 400 | 404 | 500 => "Error"
+  case _               => "Unknown status"
+}
+
+def multipleTypePatterns(obj: Any): String = obj match {
+  case _: String | _: Int => "It's either a String or an Int"
+  case _                  => "It's something else"
+}
+
+def unionTypePattern(obj: Any): String = obj match {
+  case _: (String | Int) => "It's either a String or an Int"
+  case _                 => "It's something else"
+}

scala-core-modules/scala-core/src/test/scala-3/com/baeldung/scala/patternmatching/MultipleMatchesUnitTest.scala

@@ -0,0 +1,33 @@
+package com.baeldung.scala.patternmatching
+
+import org.scalatest.flatspec.AnyFlatSpec
+import org.scalatest.matchers.should.Matchers
+
+class MultipleMatchesUnitTest extends AnyFlatSpec with Matchers {
+
+  "executeCommand" should "start the system when given the command" in {
+    val result = executeCommand(Start)
+    result shouldEqual "System Starting."
+  }
+
+  it should "stop the system when given the command" in {
+    val result = executeCommand(CustomCommand("halt"))
+    result shouldEqual "System Stopping."
+  }
+
+  "httpResponse" should "Error" in {
+    val result = httpResponse(404)
+    result shouldEqual "Error"
+  }
+
+  "multipleTypePatterns" should "Error" in {
+    val result = multipleTypePatterns(4.4)
+    result shouldEqual "It's something else"
+  }
+
+  "unionTypePattern" should "Error" in {
+    val result = unionTypePattern(42)
+    result shouldEqual "It's either a String or an Int"
+  }
+
+}