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Pull out some non-essential pieces of the Shared Layer examples #7040

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Jul 7, 2022
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Pull out some non-essential pieces of the Shared Layer examples #7040

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35 changes: 10 additions & 25 deletions docs/datatypes/test/spec.md
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Original file line number Diff line number Diff line change
Expand Up @@ -134,15 +134,14 @@ import zio._
case class Counter(value: Ref[Int]) {
def inc: UIO[Unit] = value.update(_ + 1)
def get: UIO[Int] = value.get
def reset: UIO[Unit] = value.set(0)
}

object Counter {
val layer =
ZLayer.scoped(
ZIO.acquireRelease(
Ref.make(0).map(Counter(_)) <* ZIO.debug("Counter initialized!")
)(c => c.get.debug("Number of tests executed") *> c.reset)
)(c => c.get.debug("Number of tests executed"))
)
def inc = ZIO.service[Counter].flatMap(_.inc)
}
Expand Down Expand Up @@ -216,11 +215,9 @@ import zio.test._

object Spec1 extends SharedCounterSpec {
override def spec =
suite("spec1")(
test("test1") {
assertTrue(true)
} @@ TestAspect.after(Counter.inc)
)
test("test1") {
assertTrue(true)
} @@ TestAspect.after(Counter.inc)
}
```

Expand All @@ -232,31 +229,19 @@ import zio.test._

object Spec2 extends SharedCounterSpec {
override def spec: Spec[Scope with Counter, Any] =
suite("spec2")(
test("test1") {
assertTrue(true)
} @@ TestAspect.after(Counter.inc),
test("test2") {
assertTrue(true)
} @@ TestAspect.after(Counter.inc),
test("test2") {
assertTrue(true)
} @@ TestAspect.after(Counter.inc)
)
test("test2") {
assertTrue(true)
} @@ TestAspect.after(Counter.inc)
}
```

Now, when we run all specs (`sbt testOnly org.example.*`), we will see an output like this:

```
Counter initialized!
+ spec1
+ test1
+ spec2
+ test3
+ test2
+ test1
Number of tests executed: 4
+ test1
+ test2
Number of tests executed: 2
```

The ZIO test runner will execute all specs with the shared bootstrap layer. This means that the `Counter` service will be created and managed only once, and will be shared between all specs.
Expand Down