Add test for RuntimeEnvironment new functions

be2-scala/src/test/scala/ch/epfl/pop/config/RuntimeEnvironmentSuite.scala

@@ -0,0 +1,52 @@
+package ch.epfl.pop.config
+
+import ch.epfl.pop.config.RuntimeEnvironment.{readClientEndpoints, readServerPeers}
+import org.scalatest.funsuite.{AnyFunSuiteLike => FunSuite}
+import org.scalatest.matchers.should.Matchers.{convertToAnyShouldWrapper, equal}
+
+import java.io.{BufferedWriter, FileWriter}
+import scala.io.Source.fromFile
+
+class RuntimeEnvironmentSuite extends FunSuite {
+
+  test("readClientEndpoints() should only return the addresses that match the regex from the schema") {
+    val path = "src/main/scala/ch/epfl/pop/config/client-endpoints-list.conf"
+    // Save old file content
+    val source = fromFile(path)
+    val oldContent = source.mkString
+    source.close()
+
+    // Values to add in the file
+    val address1 = "ws://127.0.0.1:7000/client"
+    val address2 = "ws://127.0.0.1:8000/client"
+    val address3 = "ws://127.0.0.1:9000/client"
+    val invalidAddress = "http://127.0.0.1/"
+
+    // Writing the values
+    var file = new BufferedWriter(new FileWriter(path))
+
+    file.append(address1)
+    file.newLine()
+    file.append(address2)
+    file.newLine()
+    file.append(invalidAddress)
+    file.newLine()
+    file.append(address3)
+    file.close()
+
+    // Verify it works as expected
+    readClientEndpoints() should equal(List(address1, address2, address3))
+
+    // Restore old content
+    file = new BufferedWriter(new FileWriter(path))
+    file.write(oldContent)
+    file.close()
+  }
+
+  // If this test doesn't pass it may be because the default config were not restored in the previous test
+  test("Read of default client endpoint and server peers config should be empty") {
+    readClientEndpoints().isEmpty should equal(true)
+    readServerPeers().isEmpty should equal(true)
+  }
+
+}