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zio.test.internal.SmartAssertions.scala Maven / Gradle / Ivy
package zio.test.internal
import zio.stacktracer.TracingImplicits.disableAutoTrace
import zio._
import zio.internal.ansi.AnsiStringOps
import zio.test.diff.{Diff, DiffResult}
import scala.reflect.ClassTag
import scala.util.{Failure, Success, Try}
import zio.test.{ErrorMessage => M, SmartAssertionOps => _, _}
object SmartAssertions {
val anything: TestArrow[Any, Boolean] =
TestArrow.make[Any, Boolean](_ => TestTrace.boolean(true)(M.was + "anything"))
def approximatelyEquals[A: Numeric](reference: A, tolerance: A): TestArrow[A, Boolean] =
TestArrow.make[A, Boolean] { actual =>
val referenceType = implicitly[Numeric[A]]
val max = referenceType.plus(reference, tolerance)
val min = referenceType.minus(reference, tolerance)
val result = referenceType.gteq(actual, min) && referenceType.lteq(actual, max)
TestTrace.boolean(result) {
M.pretty(actual) + M.did + "approximately equal" + M.pretty(reference) + "with a tolerance of" +
M.pretty(tolerance)
}
}
def custom[A, B](customAssertion: CustomAssertion[A, B]): TestArrow[A, B] =
TestArrow.make { a =>
customAssertion.run(a) match {
case Left(error) => TestTrace.fail(error)
case Right(value) => TestTrace.succeed(value)
}
}
def isSome[A]: TestArrow[Option[A], A] =
TestArrow
.make[Option[A], A] {
case Some(value) => TestTrace.succeed(value)
case None => TestTrace.fail("Option was None")
}
def asTrySuccess[A]: TestArrow[Try[A], A] =
TestArrow
.make[Try[A], A] {
case Failure(_) => TestTrace.fail("Try was Failure")
case Success(value) => TestTrace.succeed(value)
}
def asTryFailure[A]: TestArrow[Try[A], Throwable] =
TestArrow
.make[Try[A], Throwable] {
case Failure(exception) => TestTrace.succeed(exception)
case Success(_) => TestTrace.fail("Try was Success")
}
def asRight[A]: TestArrow[Either[_, A], A] =
TestArrow
.make[Either[_, A], A] {
case Right(value) => TestTrace.succeed(value)
case Left(_) => TestTrace.fail("Either was Left")
}
def asLeft[A]: TestArrow[Either[A, _], A] =
TestArrow
.make[Either[A, _], A] {
case Left(value) => TestTrace.succeed(value)
case Right(_) => TestTrace.fail("Either was Right")
}
def isEmptyIterable[A]: TestArrow[Iterable[A], Boolean] =
TestArrow
.make[Iterable[A], Boolean] { as =>
TestTrace.boolean(as.isEmpty) {
className(as) + M.was + "empty" + M.text(s"(size ${as.size})")
}
}
def isEmptyString: TestArrow[String, Boolean] =
TestArrow
.make[String, Boolean] { string =>
TestTrace.boolean(string.isEmpty) {
M.pretty(string) + M.was + "empty" + M.text(s"(length ${string.length})")
}
}
def isNonEmptyIterable: TestArrow[Iterable[Any], Boolean] =
TestArrow
.make[Iterable[Any], Boolean] { as =>
TestTrace.boolean(as.nonEmpty) {
className(as) + M.choice("was not", "was") + "empty"
}
}
def isNonEmptyString: TestArrow[String, Boolean] =
TestArrow
.make[String, Boolean] { string =>
TestTrace.boolean(string.nonEmpty) {
M.pretty(string) + M.choice("was not", "was") + "empty"
}
}
def isEmptyOption: TestArrow[Option[Any], Boolean] =
TestArrow
.make[Option[Any], Boolean] { option =>
TestTrace.boolean(option.isEmpty) {
className(option) + M.was + "empty"
}
}
def isDefinedOption: TestArrow[Option[Any], Boolean] =
TestArrow
.make[Option[Any], Boolean] { option =>
TestTrace.boolean(option.isDefined) {
className(option) + M.was + "defined"
}
}
def forallIterable[A](predicate: TestArrow[A, Boolean]): TestArrow[Iterable[A], Boolean] =
TestArrow
.make[Iterable[A], Boolean] { seq =>
val results = seq.map(a => TestArrow.run(predicate, Right(a)))
val failures = results.filter(_.isFailure)
val elements = if (failures.size == 1) "element" else "elements"
TestTrace.Node(
Result.succeed(failures.isEmpty),
M.pretty(failures.size) + M.text(s"$elements failed the predicate"),
children = if (failures.isEmpty) None else Some(failures.reduce(_ && _))
)
}
def existsIterable[A](predicate: TestArrow[A, Boolean]): TestArrow[Iterable[A], Boolean] =
TestArrow
.make[Iterable[A], Boolean] { seq =>
val result = seq.view.map(a => TestArrow.run(predicate, Right(a))).find(tt => tt.isSuccess || tt.isDie)
val success = result.filter(_.isSuccess)
val elements = if (success.nonEmpty) "element" else "elements"
val elementsSatisfiedPredicateMsg =
if (result.exists(_.isDie))
M.text(s"$elements satisfied the predicate before it threw an exception")
else
M.text(s"$elements satisfied the predicate")
TestTrace.Node(
Result.succeed(success.nonEmpty),
M.pretty(success.size) + elementsSatisfiedPredicateMsg,
children = result
)
}
def containsSeq[A, B >: A](value: A): TestArrow[Seq[B], Boolean] =
TestArrow
.make[Seq[B], Boolean] { seq =>
TestTrace.boolean(seq.contains(value)) {
className(seq) + M.did + "contain" + M.pretty(value)
}
}
def containsIterable[A](value: A): TestArrow[Iterable[A], Boolean] =
TestArrow
.make[Iterable[A], Boolean] { seq =>
TestTrace.boolean(seq.exists(_ == value)) {
className(seq) + M.did + "contain" + M.pretty(value)
}
}
def containsCause[E](expected: Cause[E]): TestArrow[Cause[E], Boolean] =
TestArrow
.make[Cause[E], Boolean] { cause =>
TestTrace.boolean(cause.contains(expected)) {
M.pretty(cause) + M.did + "contain" + M.pretty(expected)
}
}
def containsOption[A](value: A): TestArrow[Option[A], Boolean] =
TestArrow
.make[Option[A], Boolean] { option =>
TestTrace.boolean(option.contains(value)) {
className(option) + M.did + "contain" + M.pretty(value)
}
}
def containsString(value: String): TestArrow[String, Boolean] =
TestArrow
.make[String, Boolean] { str =>
TestTrace.boolean(str.contains(value)) {
M.pretty(str) + M.did + "contain" + M.pretty(value)
}
}
def hasAt[A](index: Int): TestArrow[Seq[A], A] =
TestArrow
.make[Seq[A], A] { as =>
Try(as(index)).toOption match {
case Some(value) => TestTrace.succeed(value)
case None =>
TestTrace.fail(
M.text("Invalid index") + M.value(index) + "for" + className(as) + "of size" + M.value(as.length)
)
}
}
def hasField[A, B](name: String, proj: A => B): TestArrow[A, B] =
TestArrow
.make[A, B] { a =>
TestTrace.succeed(proj(a))
}
def hasKey[K, V](key: K): TestArrow[Map[K, V], V] =
TestArrow
.make[Map[K, V], V] { mapKV =>
Try(mapKV(key)).toOption match {
case Some(value) => TestTrace.succeed(value)
case None =>
TestTrace.fail(
M.text("Missing key") + M.pretty(key)
)
}
}
def head[A]: TestArrow[Iterable[A], A] =
TestArrow
.make[Iterable[A], A] { as =>
as.headOption match {
case Some(value) => TestTrace.succeed(value)
case None =>
TestTrace.fail(className(as) + "was empty")
}
}
def last[A]: TestArrow[Iterable[A], A] =
TestArrow
.make[Iterable[A], A] { as =>
as.lastOption match {
case Some(value) => TestTrace.succeed(value)
case None => TestTrace.fail(className(as) + "was empty")
}
}
def isEven[A](implicit integral: Integral[A]): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { (a: A) =>
TestTrace.boolean(integral.rem(a, integral.fromInt(2)) == integral.fromInt(0)) {
M.pretty(a) + M.was + "even"
}
}
def isOdd[A](implicit integral: Integral[A]): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { (a: A) =>
TestTrace.boolean(integral.rem(a, integral.fromInt(2)) == integral.fromInt(1)) {
M.pretty(a) + M.was + "odd"
}
}
def greaterThan[A](that: A)(implicit ordering: Ordering[A]): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { (a: A) =>
TestTrace.boolean(ordering.gt(a, that)) {
M.pretty(a) + M.was + "greater than" + M.pretty(that)
}
}
def greaterThanOrEqualTo[A](that: A)(implicit ordering: Ordering[A]): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(ordering.gteq(a, that)) {
M.pretty(a) + M.was + s"greater than or equal to" + M.pretty(that)
}
}
def lessThan[A](that: A)(implicit ordering: Ordering[A]): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(ordering.lt(a, that)) {
M.pretty(a) + M.was + "less than" + M.pretty(that)
}
}
def lessThanOrEqualTo[A](that: A)(implicit ordering: Ordering[A]): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(ordering.lteq(a, that)) {
M.pretty(a) + M.was + "less than or equal to" + M.pretty(that)
}
}
def greaterThanL[A, B](that: B)(implicit ordering: Ordering[B], conv: (A => B)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { (a: A) =>
TestTrace.boolean(ordering.gt(conv(a), that)) {
M.pretty(a) + M.was + "greater than" + M.pretty(that)
}
}
def greaterThanOrEqualToL[A, B](that: B)(implicit ordering: Ordering[B], conv: (A => B)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(ordering.gteq(conv(a), that)) {
M.pretty(a) + M.was + s"greater than or equal to" + M.pretty(that)
}
}
def lessThanL[A, B](that: B)(implicit ordering: Ordering[B], conv: (A => B)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(ordering.lt(conv(a), that)) {
M.pretty(a) + M.was + "less than" + M.pretty(that)
}
}
def lessThanOrEqualToL[A, B](that: B)(implicit ordering: Ordering[B], conv: (A => B)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(ordering.lteq(conv(a), that)) {
M.pretty(a) + M.was + "less than or equal to" + M.pretty(that)
}
}
def greaterThanR[A, B](that: B)(implicit ordering: Ordering[A], conv: (B => A)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { (a: A) =>
TestTrace.boolean(ordering.gt(a, conv(that))) {
M.pretty(a) + M.was + "greater than" + M.pretty(that)
}
}
def greaterThanOrEqualToR[A, B](that: B)(implicit ordering: Ordering[A], conv: (B => A)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(ordering.gteq(a, conv(that))) {
M.pretty(a) + M.was + s"greater than or equal to" + M.pretty(that)
}
}
def lessThanR[A, B](that: B)(implicit ordering: Ordering[A], conv: (B => A)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(ordering.lt(a, conv(that))) {
M.pretty(a) + M.was + "less than" + M.pretty(that)
}
}
def lessThanOrEqualToR[A, B](that: B)(implicit ordering: Ordering[A], conv: (B => A)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(ordering.lteq(a, conv(that))) {
M.pretty(a) + M.was + "less than or equal to" + M.pretty(that)
}
}
def equalTo[A](that: A)(implicit diff: OptionalImplicit[Diff[A]]): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
val result = (a, that) match {
case (a: Array[_], that: Array[_]) => a.sameElements[Any](that)
case _ => a == that
}
TestTrace.boolean(result) {
diff.value match {
case Some(diff) if !diff.isLowPriority && !result =>
val diffResult = diff.diff(that, a)
diffResult match {
case DiffResult.Different(_, _, None) =>
M.pretty(a) + M.equals + M.pretty(that)
case diffResult =>
M.choice("There was no difference", "There was a difference") ++
M.custom(ConsoleUtils.underlined("Expected")) ++ M.custom(PrettyPrint(that)) ++
M.custom(
ConsoleUtils.underlined(
"Diff"
) + s" ${scala.Console.RED}-expected ${scala.Console.GREEN}+obtained".faint
) ++
M.custom(scala.Console.RESET + diffResult.render)
}
case _ =>
M.pretty(a) + M.equals + M.pretty(that)
}
}
}
def equalToL[A, B](that: B)(implicit diff: OptionalImplicit[Diff[B]], conv: (A => B)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
val result = (a, that) match {
case (a: Array[_], that: Array[_]) => a.sameElements[Any](that)
case _ => a == that
}
TestTrace.boolean(result) {
diff.value match {
case Some(diff) if !diff.isLowPriority && !result =>
val diffResult = diff.diff(that, conv(a))
diffResult match {
case DiffResult.Different(_, _, None) =>
M.pretty(a) + M.equals + M.pretty(that)
case diffResult =>
M.choice("There was no difference", "There was a difference") ++
M.custom(ConsoleUtils.underlined("Expected")) ++ M.custom(PrettyPrint(that)) ++
M.custom(
ConsoleUtils.underlined(
"Diff"
) + s" ${scala.Console.RED}-expected ${scala.Console.GREEN}+obtained".faint
) ++
M.custom(scala.Console.RESET + diffResult.render)
}
case _ =>
M.pretty(a) + M.equals + M.pretty(that)
}
}
}
def equalToR[A, B](that: B)(implicit diff: OptionalImplicit[Diff[A]], conv: (B => A)): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
val result = (a, that) match {
case (a: Array[_], that: Array[_]) => a.sameElements[Any](that)
case _ => a == that
}
TestTrace.boolean(result) {
diff.value match {
case Some(diff) if !diff.isLowPriority && !result =>
val diffResult = diff.diff(conv(that), a)
diffResult match {
case DiffResult.Different(_, _, None) =>
M.pretty(a) + M.equals + M.pretty(that)
case diffResult =>
M.choice("There was no difference", "There was a difference") ++
M.custom(ConsoleUtils.underlined("Expected")) ++ M.custom(PrettyPrint(that)) ++
M.custom(
ConsoleUtils.underlined(
"Diff"
) + s" ${scala.Console.RED}-expected ${scala.Console.GREEN}+obtained".faint
) ++
M.custom(scala.Console.RESET + diffResult.render)
}
case _ =>
M.pretty(a) + M.equals + M.pretty(that)
}
}
}
def asCauseDie[E]: TestArrow[Cause[E], Throwable] =
TestArrow
.make[Cause[E], Throwable] {
case cause if cause.dieOption.isDefined =>
TestTrace.succeed(cause.dieOption.get)
case _ =>
TestTrace.fail(M.value("Cause") + M.did + "contain a" + M.value("Die"))
}
def asCauseFailure[E]: TestArrow[Cause[E], E] =
TestArrow
.make[Cause[E], E] {
case cause if cause.failureOption.isDefined =>
TestTrace.succeed(cause.failureOption.get)
case _ =>
TestTrace.fail(M.value("Cause") + M.did + "contain a" + M.value("Fail"))
}
def asCauseInterrupted[E]: TestArrow[Cause[E], Boolean] =
TestArrow
.make[Cause[E], Boolean] {
case cause if cause.isInterrupted =>
TestTrace.succeed(true)
case _ =>
TestTrace.fail(M.value("Cause") + M.did + "contain a" + M.value("Interrupt"))
}
def asExitDie[E, A]: TestArrow[Exit[E, A], Throwable] =
TestArrow
.make[Exit[E, A], Throwable] {
case Exit.Failure(cause) if cause.dieOption.isDefined =>
TestTrace.succeed(cause.dieOption.get)
case Exit.Success(_) =>
TestTrace.fail(M.value("Exit.Success") + M.was + "a" + M.value("Cause.Die"))
case Exit.Failure(_) =>
TestTrace.fail(M.value("Exit.Failure") + M.did + "contain a" + M.value("Cause.Die"))
}
def asExitCause[E]: TestArrow[Exit[E, Any], Cause[E]] =
TestArrow
.make[Exit[E, Any], Cause[E]] {
case Exit.Failure(cause) =>
TestTrace.succeed(cause)
case Exit.Success(_) =>
TestTrace.fail(M.value("Exit.Success") + M.did + "contain a" + M.value("Cause"))
}
def asExitFailure[E]: TestArrow[Exit[E, Any], E] =
TestArrow
.make[Exit[E, Any], E] {
case Exit.Failure(cause) if cause.failureOption.isDefined =>
TestTrace.succeed(cause.failureOption.get)
case Exit.Success(_) =>
TestTrace.fail(M.value("Exit.Success") + M.was + "a" + M.value("Failure"))
case Exit.Failure(_) =>
TestTrace.fail(M.value("Exit.Failure") + M.did + "contain a" + M.value("Cause.Fail"))
}
def asExitInterrupted[E, A]: TestArrow[Exit[E, A], Boolean] =
TestArrow
.make[Exit[E, A], Boolean] {
case Exit.Failure(cause) if cause.isInterrupted =>
TestTrace.succeed(true)
case Exit.Success(_) =>
TestTrace.fail(M.value("Exit.Success") + M.was + "interrupted")
case Exit.Failure(_) =>
TestTrace.fail(M.value("Exit.Failure") + M.did + "contain a" + M.value("Cause.Interrupt"))
}
def asExitSuccess[E, A]: TestArrow[Exit[E, A], A] =
TestArrow
.make[Exit[E, A], A] {
case Exit.Success(value) =>
TestTrace.succeed(value)
case Exit.Failure(_) =>
TestTrace.fail(M.value("Exit") + M.was + "a" + M.value("Success"))
}
val throws: TestArrow[Any, Throwable] =
TestArrow.makeEither(
TestTrace.succeed,
_ => TestTrace.fail("Expected failure")
)
def as[A, B](implicit CB: ClassTag[B]): TestArrow[A, B] =
TestArrow
.make[A, B] { a =>
CB.unapply(a) match {
case Some(value) => TestTrace.succeed(value)
case None =>
TestTrace.fail(M.value(a.getClass.getSimpleName) + "is not an instance of" + M.value(className(CB)))
}
}
def is[A, B](implicit CB: ClassTag[B]): TestArrow[A, Boolean] =
TestArrow
.make[A, Boolean] { a =>
TestTrace.boolean(CB.unapply(a).isDefined) {
M.value(a.getClass.getSimpleName) + M.was + "an instance of" + M.value(className(CB))
}
}
def startsWithSeq[A](prefix: Seq[A]): TestArrow[Seq[A], Boolean] =
TestArrow
.make[Seq[A], Boolean] { seq =>
TestTrace.boolean(seq.startsWith(prefix)) {
M.pretty(seq) + M.did + "start with" + M.pretty(prefix)
}
}
def startsWithString(prefix: String): TestArrow[String, Boolean] =
TestArrow
.make[String, Boolean] { string =>
TestTrace.boolean(string.startsWith(prefix)) {
M.value(string) + M.did + "start with" + M.value(prefix)
}
}
def endsWithSeq[A](postfix: Seq[A]): TestArrow[Seq[A], Boolean] =
TestArrow
.make[Seq[A], Boolean] { seq =>
TestTrace.boolean(seq.endsWith(postfix)) {
M.value(seq) + M.did + "end with" + M.value(seq)
}
}
def endsWithString(postfix: String): TestArrow[String, Boolean] =
TestArrow
.make[String, Boolean] { string =>
TestTrace.boolean(string.endsWith(postfix)) {
M.value(string) + M.did + "end with" + M.value(postfix)
}
}
private def className[A](C: ClassTag[A]): String =
try {
C.runtimeClass.getSimpleName
} catch {
// See https://github.com/scala/bug/issues/2034.
case t: InternalError if t.getMessage == "Malformed class name" =>
C.runtimeClass.getName
}
private def className[A](a: Iterable[A]) =
M.value(a.toString.takeWhile(_ != '('))
private def className[A](a: Option[A]) =
M.value(a.toString.takeWhile(_ != '('))
object Implicits {
case class Converter[-A, +B](f: A => B)
case class Converter2[-A, +B](f: A => B)
implicit val byte: Converter[Byte, java.lang.Byte] = Converter(x => x)
implicit val short: Converter[Short, java.lang.Short] = Converter(x => x)
implicit val int: Converter[Int, java.lang.Integer] = Converter(x => x)
implicit val long: Converter[Long, java.lang.Long] = Converter(x => x)
implicit val float: Converter[Float, java.lang.Float] = Converter(x => x)
implicit val double: Converter[Double, java.lang.Double] = Converter(x => x)
implicit val byte2: Converter2[java.lang.Byte, Byte] = Converter2(x => x)
implicit val short2: Converter2[java.lang.Short, Short] = Converter2(x => x)
implicit val int2: Converter2[java.lang.Integer, Int] = Converter2(x => x)
implicit val long2: Converter2[java.lang.Long, Long] = Converter2(x => x)
implicit val float2: Converter2[java.lang.Float, Float] = Converter2(x => x)
implicit val double2: Converter2[java.lang.Double, Double] = Converter2(x => x)
implicit def converter[A, B, C](implicit g: Converter[B, C], f: A => B): A => C =
g.f.compose(f)
implicit def converter2[A, B, C](implicit f: Converter2[A, B], g: B => C): A => C =
g.compose(f.f)
}
}
