Copied from poc implementation

.travis.yml

@@ -0,0 +1,11 @@
+language: scala
+
+scala:
+- 2.12.6
+
+script:
+- sbt test
+
+before_cache:
+- find $HOME/.ivy2/cache -name "ivydata-*.properties" -print -delete
+- find $HOME/.sbt        -name "*.lock"               -print -delete

build.sbt

@@ -0,0 +1,36 @@
+name := "scalatest-structured-before"
+organization := "com.github.bigwheel"
+version := "1.0"
+scalaVersion := "2.12.6"
+
+libraryDependencies ++= Seq(
+  "org.scalactic" %% "scalactic" % "[3.0.5,)",
+  "org.scalatest" %% "scalatest" % "[3.0.5,)",
+  "org.scalaz" %% "scalaz-core" % "[7.2.26,)",
+)
+
+// about maven publish
+publishMavenStyle := true
+publishTo := {
+  val nexus = "https://oss.sonatype.org/"
+  if (isSnapshot.value)
+    Some("snapshots" at nexus + "content/repositories/snapshots")
+  else
+    Some("releases"  at nexus + "service/local/staging/deploy/maven2")
+}
+publishArtifact in Test := false
+licenses := Seq("BSD-3-Clause" -> url("https://github.com/bigwheel/scalatest-structured-before/blob/master/LICENSE"))
+homepage := Some(url("https://github.com/bigwheel/scalatest-structured-before"))
+pomExtra := (
+  <scm>
+    <url>git@github.com:bigwheel/scalatest-structured-before.git</url>
+    <connection>scm:git:git@github.com:bigwheel/scalatest-structured-before.git</connection>
+  </scm>
+    <developers>
+      <developer>
+        <id>bigwheel</id>
+        <name>k.bigwheel</name>
+        <url>https://github.com/bigwheel</url>
+      </developer>
+    </developers>
+  )

project/build.properties

@@ -1 +1 @@
-sbt.version = 1.2.1
+sbt.version = 1.2.3

src/main/scala/com/github/bigwheel/scalatest/FunSpecEx.scala

@@ -0,0 +1,49 @@
+package com.github.bigwheel.scalatest
+
+import org.scalatest._
+import org.scalactic._
+
+import scalaz._
+import Scalaz._
+
+class FunSpecEx extends FunSpec {
+
+  private[this] type Description = (String, () => Unit)
+  private[this] type DescriptionOrTestTitle = \/[Description, String]
+  private[this] var tree: Tree[DescriptionOrTestTitle] = ("", () => ()).left[String].node()
+
+  override protected val it: ItWord = new ItWord() {
+    override def apply(specText: String, testTags: Tag*)(testFun: => Any /* Assertion */)(implicit pos: source.Position): Unit = {
+      tree = tree.loc.insertDownLast(\/-(specText).asInstanceOf[DescriptionOrTestTitle].leaf).toTree
+      super.apply(specText, testTags: _*)(testFun)(pos)
+    }
+  }
+
+  protected[this] def describeWithBefore(description: String)
+    (before: => Unit)
+    (fun: => Unit)
+    (implicit pos: org.scalactic.source.Position): Unit = {
+    val backup = tree
+    tree = (description, before _).left[String].node()
+    super.describe(description)(fun)(pos)
+    tree = backup.loc.insertDownLast(tree).toTree
+  }
+
+  protected override def runTest(testName: String, args: Args): Status = {
+    val targetTestLeaf: TreeLoc[DescriptionOrTestTitle] = tree.loc.find { treeLoc =>
+      val strOfDescriptionAndTest = treeLoc.path.reverse.map {
+        case -\/(yyy) => yyy._1
+        case \/-(xxx) => xxx
+      }
+      strOfDescriptionAndTest.tail.mkString(" ") == testName
+    }.get
+    val descriptions: Seq[DescriptionOrTestTitle] = targetTestLeaf.path.reverse
+    val befores: Seq[() => Unit] = descriptions.map {
+      case -\/(yyy) => yyy._2
+      case \/-(_) => () => ()
+    }
+    for (before <- befores) before()
+    super.runTest(testName, args)
+  }
+
+}

src/test/scala/com/github/bigwheel/scalatest/FunSpecExSpec.scala

@@ -0,0 +1,36 @@
+package com.github.bigwheel.scalatest
+
+import org.scalatest.Matchers
+
+class FunSpecExSpec extends FunSpecEx with Matchers {
+
+  var subject: Int = _
+
+  describeWithBefore("When initialized by 0"){ subject = 0 } {
+    it("is 0") {
+      subject should be(0)
+    }
+
+    describeWithBefore("when + 5"){ subject += 5 } {
+      it("is 5") {
+        subject should be(5)
+      }
+
+      describeWithBefore("then - 3"){ subject -= 3 } {
+        it("is 2") {
+          subject should be(2)
+        }
+        it("also is even") {
+          (2 % 2) should be (0)
+        }
+      }
+
+      describeWithBefore("and * -1"){ subject *= -1 } {
+        it("is -5") {
+          subject should be(-5)
+        }
+      }
+    }
+  }
+
+}