TST: Test using Array conversion instead of equals

Author: MechCoder

mllib/src/main/scala/org/apache/spark/mllib/linalg/Matrices.scala

@@ -519,13 +519,6 @@ class SparseMatrix(
     }
   }
 
-  override def equals(o: Any) = o match {
-    case m: SparseMatrix =>
-      (m.numRows == numRows && m.numCols == numCols && Arrays.equals(colPtrs, m.colPtrs)
-       && Arrays.equals(rowIndices, m.rowIndices) && Arrays.equals(values, m.values))
-    case _ => false
-  }
-
   override def copy = new SparseMatrix(numRows, numCols, colPtrs, rowIndices, values.clone())
 
   private[mllib] def map(f: Double => Double) =

mllib/src/test/scala/org/apache/spark/mllib/linalg/MatricesSuite.scala

@@ -432,7 +432,7 @@ class MatricesSuite extends FunSuite {
     val sm2 = dm2.toSparse
     val mUDT = new MatrixUDT()
     Seq(dm1, dm2, sm1, sm2).foreach {
-        mat => assert(mat === mUDT.deserialize(mUDT.serialize(mat)))
+        mat => assert(mat.toArray === mUDT.deserialize(mUDT.serialize(mat)).toArray)
     }
   }
 }