add BireducibleTests

laws/src/main/scala/cats/laws/discipline/BireducibleTests.scala

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2015 Typelevel
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package cats
+package laws
+package discipline
+
+import org.scalacheck.Arbitrary
+import org.scalacheck.Cogen
+import org.scalacheck.Prop._
+
+import arbitrary._
+
+trait BireducibleTests[F[_, _]] extends BifoldableTests[F] {
+  def laws: BireducibleLaws[F]
+
+  def bireducible[
+    A: Arbitrary: Cogen: Eq: Semigroup,
+    B: Arbitrary: Cogen: Eq: Semigroup,
+    C: Arbitrary: Cogen: Eq: Monoid
+  ](implicit arbF: Arbitrary[F[A, B]]): RuleSet =
+    new DefaultRuleSet(
+      "bireducible",
+      Some(bifoldable[A, B, C]),
+      "bireduceLeft consistent with default implementation" ->
+        forAll(laws.bireduceLeftConsistentWithDefaultImplementation[A, B] _),
+      "bireduceRight consistent with default implementation" ->
+        forAll(laws.bireduceRightConsistentWithDefaultImplementation[A, B] _),
+      "bireduceMap consistent with default implementation" ->
+        forAll(laws.bireduceMapConsistentWithDefaultImplementation[A, B, C] _),
+      "bireduce consistent with default implementation" ->
+        forAll(laws.bireduceConsistentWithDefaultImplementation[A, B] _),
+      "bireduceLeftTo consistent with bireduceRightTo" ->
+        forAll(laws.bireduceLeftToConsistentWithBireduceRightTo[A, B, C] _)
+    )
+}
+
+object BireducibleTests {
+  def apply[F[_, _]: Bireducible]: BireducibleTests[F] =
+    new BireducibleTests[F] { def laws: BireducibleLaws[F] = BireducibleLaws[F] }
+}