Include usual test dependencies

Author: michaelahlers

dependencies.sbt

@@ -1 +1,31 @@
 ThisBuild / scalaVersion := "2.13.14"
+
+/**
+ * ScalaTest is the most flexible and most popular testing tool in the Scala ecosystem.
+ * @see [[https://www.scalatest.org/]]
+ */
+libraryDependencies +=
+  "org.scalatest" %% "scalatest" % "3.2.18" % Test
+
+/**
+ * Readable deltas for Scala case classes.
+ * @see [[https://github.com/softwaremill/diffx]]
+ */
+libraryDependencies ++=
+  "com.softwaremill.diffx"   %% "diffx-scalatest-must"   % "0.9.0" % Test ::
+    "com.softwaremill.diffx" %% "diffx-scalatest-should" % "0.9.0" % Test ::
+    Nil
+
+/**
+ * Property-based testing for Scala, with support for ScalaTest.
+ * Also includes support for automatic derivation of ScalaCheck instances.
+ *
+ * @see [[https://scalacheck.org]]
+ * @see [[https://scalatest.org/plus/scalacheck]]
+ * @see [[https://github.com/spotify/magnolify]]
+ */
+libraryDependencies ++=
+  "org.scalacheck"      %% "scalacheck"           % "1.17.0"   % Test ::
+    "org.scalatestplus" %% "scalacheck-1-17"      % "3.2.18.0" % Test ::
+    "com.spotify"       %% "magnolify-scalacheck" % "0.7.2"    % Test ::
+    Nil