Add test for RealNNVectorizer (#288)

core/src/test/scala/com/salesforce/op/stages/impl/feature/RealNNVectorizerTest.scala

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2017, Salesforce.com, Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * * Redistributions of source code must retain the above copyright notice, this
+ *   list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright notice,
+ *   this list of conditions and the following disclaimer in the documentation
+ *   and/or other materials provided with the distribution.
+ *
+ * * Neither the name of the copyright holder nor the names of its
+ *   contributors may be used to endorse or promote products derived from
+ *   this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+package com.salesforce.op.stages.impl.feature
+
+import com.salesforce.op.features.types.{ArrayDoubleConversions, OPVector, RealNN}
+import com.salesforce.op.test.{OpTransformerSpec, TestFeatureBuilder}
+import org.junit.runner.RunWith
+import org.scalatest.junit.JUnitRunner
+
+@RunWith(classOf[JUnitRunner])
+class RealNNVectorizerTest extends OpTransformerSpec[OPVector, RealNNVectorizer] {
+  val sample = Seq(RealNN(-1.0), RealNN(-4.0), RealNN(5.0), RealNN(-5.5), RealNN(0.1), RealNN(2.0), RealNN(0.0))
+  val (inputData, f1) = TestFeatureBuilder(sample)
+  val transformer: RealNNVectorizer = new RealNNVectorizer().setInput(f1)
+
+  val expectedResult: Seq[OPVector] = Array(-1.0, -4.0, 5.0, -5.5, 0.1, 2.0, 0.0).map(Array(_).toOPVector)
+
+  it should "be applied via shortcut" in {
+    val f2 = f1.vectorize()
+    f2.originStage.isInstanceOf[RealNNVectorizer] shouldBe true
+  }
+}