Github user mengxr commented on a diff in the pull request:
https://github.com/apache/spark/pull/1425#discussion_r15361609
--- Diff:
mllib/src/test/scala/org/apache/spark/mllib/util/TestingUtilsSuite.scala ---
@@ -0,0 +1,264 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.mllib.util
+
+import org.apache.spark.mllib.linalg.Vectors
+import org.scalatest.FunSuite
+import org.apache.spark.mllib.util.TestingUtils._
+import org.scalatest.exceptions.TestFailedException
+
+class TestingUtilsSuite extends FunSuite {
+
+ test("Comparing doubles using relative error in percentage.") {
+
+ assert(23.1 ~== 23.52 %+- 2.0)
+ assert(23.1 ~== 22.74 %+- 2.0)
+ assert(23.1 ~= 23.52 %+- 2.0)
+ assert(23.1 ~= 22.74 %+- 2.0)
+ assert(!(23.1 !~= 23.52 %+- 2.0))
+ assert(!(23.1 !~= 22.74 %+- 2.0))
+
+ withClue("Should throw exception with message when test fails.") {
+ intercept[TestFailedException] {
+ // This will throw exception with the following message.
+ // "Did not expect 23.1 and 23.52 to be within 2.0% using relative
error."
+ assert(23.1 !~== 23.52 %+- 2.0)
+ }
+ intercept[TestFailedException] {
+ // "Did not expect 23.1 and 22.74 to be within 2.0% using relative
error."
+ assert(23.1 !~== 22.74 %+- 2.0)
+ }
+ }
+
+ assert(23.1 !~== 23.63 %+- 2.0)
+ assert(23.1 !~== 22.34 %+- 2.0)
+ assert(23.1 !~= 23.63 %+- 2.0)
+ assert(23.1 !~= 22.34 %+- 2.0)
+ assert(!(23.1 ~= 23.63 %+- 2.0))
+ assert(!(23.1 ~= 22.34 %+- 2.0))
+
+ withClue("Should throw exception with message when test fails.") {
+ intercept[TestFailedException] {
+ // "Expected 23.1 and 23.63 to be within 2.0% using relative
error."
+ assert(23.1 ~== 23.63 %+- 2.0)
+ }
+ intercept[TestFailedException] {
+ // "Expected 23.1 and 22.34 to be within 2.0% using relative
error."
+ assert(23.1 ~== 22.34 %+- 2.0)
+ }
+ }
+
+ withClue("Comparing against zero should fail the test and throw
exception with message.") {
+ intercept[TestFailedException] {
+ // 0.1 or 0.0 is extremely close to zero, so the relative error is
meaningless.
+ assert(0.1 ~== 0.0 %+- 3.2)
+ }
+ intercept[TestFailedException] {
+ // 0.1 or 0.0 is extremely close to zero, so the relative error is
meaningless.
+ assert(0.1 ~= 0.0 %+- 3.2)
+ }
+ intercept[TestFailedException] {
+ // 0.1 or 0.0 is extremely close to zero, so the relative error is
meaningless.
+ assert(0.1 !~== 0.0 %+- 3.2)
+ }
+ intercept[TestFailedException] {
+ // 0.1 or 0.0 is extremely close to zero, so the relative error is
meaningless.
+ assert(0.1 !~= 0.0 %+- 3.2)
+ }
+ intercept[TestFailedException] {
+ // 0.0 or 0.1 is extremely close to zero, so the relative error is
meaningless.
+ assert(0.0 ~== 0.1 %+- 3.2)
+ }
+ intercept[TestFailedException] {
+ // 0.0 or 0.1 is extremely close to zero, so the relative error is
meaningless.
+ assert(0.0 ~= 0.1 %+- 3.2)
+ }
+ intercept[TestFailedException] {
+ // 0.0 or 0.1 is extremely close to zero, so the relative error is
meaningless.
+ assert(0.0 !~== 0.1 %+- 3.2)
+ }
+ intercept[TestFailedException] {
+ // 0.0 or 0.1 is extremely close to zero, so the relative error is
meaningless.
+ assert(0.0 !~= 0.1 %+- 3.2)
+ }
+ }
+
+ // Comparisons of numbers very close to zero.
+ assert(10 * Double.MinPositiveValue ~== 9.5 * Double.MinPositiveValue
%+- 1.0)
+ assert(10 * Double.MinPositiveValue !~== 11 * Double.MinPositiveValue
%+- 1.0)
+
+ assert(-Double.MinPositiveValue ~== 1.18 * -Double.MinPositiveValue
%+- 1.2)
+ assert(-Double.MinPositiveValue ~== 1.38 * -Double.MinPositiveValue
%+- 1.2)
+ }
+
+ test("Comparing doubles using absolute error.") {
+
+ assert(17.8 ~== 17.99 +- 0.2)
+ assert(17.8 ~== 17.61 +- 0.2)
+ assert(17.8 ~= 17.99 +- 0.2)
+ assert(17.8 ~= 17.61 +- 0.2)
+ assert(!(17.8 !~= 17.99 +- 0.2))
+ assert(!(17.8 !~= 17.61 +- 0.2))
+
+ withClue("Should throw exception with message when test fails.") {
+ intercept[TestFailedException] {
+ // This will throw exception with the following message.
+ // "Did not expect 17.8 and 17.99 to be within 0.2 using absolute
error."
+ assert(17.8 !~== 17.99 +- 0.2)
+ }
+ intercept[TestFailedException] {
+ // "Did not expect 17.8 and 17.61 to be within 0.2 using absolute
error."
+ assert(17.8 !~== 17.61 +- 0.2)
+ }
+ }
+
+ assert(17.8 !~== 18.01 +- 0.2)
+ assert(17.8 !~== 17.59 +- 0.2)
+ assert(17.8 !~= 18.01 +- 0.2)
+ assert(17.8 !~= 17.59 +- 0.2)
+ assert(!(17.8 ~= 18.01 +- 0.2))
+ assert(!(17.8 ~= 17.59 +- 0.2))
+
+ withClue("Should throw exception with message when test fails.") {
+ intercept[TestFailedException] {
+ // "Expected 17.8 and 18.01 to be within 0.2 using absolute error."
+ assert(17.8 ~== 18.01 +- 0.2)
+ }
+ intercept[TestFailedException] {
+ // "Expected 17.8 and 17.59 to be within 0.2 using absolute error."
+ assert(17.8 ~== 17.59 +- 0.2)
+ }
+ }
+
+ // Comparisons of numbers very close to zero, and both side of zeros
+ assert(Double.MinPositiveValue ~== 4 * Double.MinPositiveValue +- 5 *
Double.MinPositiveValue)
+ assert(Double.MinPositiveValue !~== 6 * Double.MinPositiveValue +- 5 *
Double.MinPositiveValue)
+
+ assert(-Double.MinPositiveValue ~== 3 * Double.MinPositiveValue +- 5 *
Double.MinPositiveValue)
+ assert(Double.MinPositiveValue !~== -4 * Double.MinPositiveValue +- 5
* Double.MinPositiveValue)
+ }
+
+ test("Comparing vectors using relative error in percentage.") {
+
+ //Comparisons of two dense vectors
+ assert(Vectors.dense(Array(3.1, 3.5)) ~== Vectors.dense(Array(3.130,
3.534)) %+- 1.0)
+
+ assert(Vectors.dense(Array(3.1, 3.5)) !~== Vectors.dense(Array(3.135,
3.534)) %+- 1.0)
+
+ assert(Vectors.dense(Array(3.1, 3.5)) ~= Vectors.dense(Array(3.130,
3.534)) %+- 1.0)
+
+ assert(Vectors.dense(Array(3.1, 3.5)) !~= Vectors.dense(Array(3.135,
3.534)) %+- 1.0)
+
+ assert(!(Vectors.dense(Array(3.1, 3.5)) !~= Vectors.dense(Array(3.130,
3.534)) %+- 1.0))
+
+ assert(!(Vectors.dense(Array(3.1, 3.5)) ~= Vectors.dense(Array(3.135,
3.534)) %+- 1.0))
+
+ withClue("Should throw exception with message when test fails.") {
+ intercept[TestFailedException] {
+ // This will throw exception with the following message.
+ // "Did not expect [3.1,3.5] and [3.13,3.534] to be within 1.0%
+ // using relative error for all elements."
+ assert(Vectors.dense(Array(3.1, 3.5)) !~==
Vectors.dense(Array(3.130, 3.534)) %+- 1.0)
+ }
+ intercept[TestFailedException] {
+ // "Expected [3.1,3.5] and [3.135,3.534] to be within 1.0%
+ // using relative error for all elements."
+ assert(Vectors.dense(Array(3.1, 3.5)) ~==
Vectors.dense(Array(3.135, 3.534)) %+- 1.0)
+ }
+ }
+
+ withClue("Comparing against zero should fail the test and throw
exception with message.") {
+ intercept[TestFailedException] {
+ // "0.01 or 0.0 is extremely close to zero, so the relative error
is meaningless."
+ assert(Vectors.dense(Array(3.1, 0.01)) ~==
Vectors.dense(Array(3.13, 0.0)) %+- 1.0)
+ }
+ intercept[TestFailedException] {
+ // "0.01 or 0.0 is extremely close to zero, so the relative error
is meaningless."
+ assert(Vectors.dense(Array(3.1, 0.01)) ~== Vectors.sparse(2,
Array(0), Array(3.13)) %+- 1.0)
+ }
+ }
+
+ // Comparisons of two sparse vectors
+ assert(Vectors.dense(Array(3.1, 3.5)) ~==
+ Vectors.sparse(2, Array(0, 1), Array(3.130, 3.534)) %+- 1.0)
+
+ assert(Vectors.dense(Array(3.1, 3.5)) !~==
+ Vectors.sparse(2, Array(0, 1), Array(3.135, 3.534)) %+- 1.0)
+ }
+
+ test("Comparing vectors using absolute error.") {
+
+ //Comparisons of two dense vectors
+ assert(Vectors.dense(Array(3.1, 3.5, 0.0)) ~==
+ Vectors.dense(Array(3.1 + 1E-8, 3.5 + 2E-7, 1E-8)) +- 1E-6)
+
+ assert(Vectors.dense(Array(3.1, 3.5, 0.0)) !~==
+ Vectors.dense(Array(3.1 + 1E-5, 3.5 + 2E-7, 1 + 1E-3)) +- 1E-6)
+
+ assert(Vectors.dense(Array(3.1, 3.5, 0.0)) ~=
+ Vectors.dense(Array(3.1 + 1E-8, 3.5 + 2E-7, 1E-8)) +- 1E-6)
+
+ assert(Vectors.dense(Array(3.1, 3.5, 0.0)) !~=
+ Vectors.dense(Array(3.1 + 1E-5, 3.5 + 2E-7, 1 + 1E-3)) +- 1E-6)
+
+ assert(!(Vectors.dense(Array(3.1, 3.5, 0.0)) !~=
+ Vectors.dense(Array(3.1 + 1E-8, 3.5 + 2E-7, 1E-8)) +- 1E-6))
+
+ assert(!(Vectors.dense(Array(3.1, 3.5, 0.0)) ~=
+ Vectors.dense(Array(3.1 + 1E-5, 3.5 + 2E-7, 1 + 1E-3)) +- 1E-6))
+
+ withClue("Should throw exception with message when test fails.") {
+ intercept[TestFailedException] {
+ // This will throw exception with the following message.
--- End diff --
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