Failure Intro example #bruce #time 20m

src/test/scala/experiments/FailVarieties.scala

@@ -3,10 +3,30 @@ package experiments
 import zio.*
 import zio.test.*
 
-case object ErrorObjectA:
-  val msg = "Failed: ErrorObjectA"
-case object ErrorObjectB
-    extends Exception("Failed: ErrorObjectB")
+case object ObjectX
+case object ExceptionX extends Exception:
+  override def toString: String = "ExceptionX"
+
+def failureTypes(n: Int) =
+  n match
+    case 0 =>
+      ZIO.fail("String fail")
+    case 1 =>
+      ZIO.fail(ObjectX)
+    case _ =>
+      ZIO.fail(ExceptionX)
+
+object TestFailureTypes extends ZIOAppDefault:
+  def run =
+    defer:
+      val r0 = failureTypes(0).flip.run
+      printLine(s"r0: $r0").run
+      val r1 = failureTypes(1).flip.run
+      printLine(s"r1: $r1").run
+      val r2 = failureTypes(2).flip.run
+      printLine(s"r2: $r2").run
+
+// -------------------------------------------------
 
 def matchTo1(n: Int) =
   if n == 1 then
@@ -22,7 +42,7 @@ def matchTo2(n: Int) =
   if n == 2 then
     defer:
       printLine("Failed at 2").run
-      ZIO.fail(ErrorObjectA)
+      ZIO.fail(ObjectX)
   else
     defer:
       printLine("Passed 2").run
@@ -32,21 +52,24 @@ def matchTo3(n: Int) =
   if n == 2 then
     defer:
       printLine("Failed at 3").run
-      ZIO.fail(ErrorObjectB)
+      ZIO.fail(ExceptionX)
   else
     defer:
       printLine("Passed 3").run
       ZIO.succeed("Passed 3")
 
 def completeTo(n: Int) =
   defer:
-    val r1 =  matchTo1(n).catchAll:
+    val r1 =
+      matchTo1(n).catchAll:
         e => ZIO.debug(s"Caught: $e").as(e)
     printLine(r1).run
-    val r2 =  matchTo2(n).catchAll:
+    val r2 =
+      matchTo2(n).catchAll:
         e => ZIO.debug(s"Caught: $e").as(e)
     printLine(r2).run
-    val r3 = matchTo3(n).catchAll:
+    val r3 =
+      matchTo3(n).catchAll:
         e => ZIO.debug(s"Caught: $e").as(e)
     printLine(s"Success: $r1 $r2 $r3").run