RootFinding: simplify unit test

src/UnitTests/RootFindingTests/BrentRootFinderTest.cs

@@ -1,22 +0,0 @@
-using MathNet.Numerics.RootFinding;
-using NUnit.Framework;
-using System;
-
-namespace MathNet.Numerics.UnitTests.RootFindingTests
-{
-    [TestFixture]
-    public class BrentRootFinderTest
-    {
-        readonly BrentRootFinder _solver = new BrentRootFinder(100, 1e-14);
-
-        [Test]
-        public void MultipleRoots()
-        {
-            Func<double, double> f = (x) => { return x * x - 4; };
-            _solver.Func = f;
-            double root = _solver.Solve(-5, 5);
-
-            Assert.AreEqual(0, f(root));
-        }
-    }
-}

src/UnitTests/RootFindingTests/BrentRootFindingTest.cs

@@ -0,0 +1,17 @@
+using MathNet.Numerics.RootFinding;
+using NUnit.Framework;
+
+namespace MathNet.Numerics.UnitTests.RootFindingTests
+{
+    [TestFixture]
+    public class BrentRootFindingTest
+    {
+        [Test]
+        public void MultipleRoots()
+        {
+            var solver = new BrentRootFinder(100, 1e-14) {Func = x => x*x - 4};
+            double root = solver.Solve(-5, 5);
+            Assert.AreEqual(0, solver.Func(root));
+        }
+    }
+}

src/UnitTests/UnitTests.csproj

@@ -770,7 +770,7 @@
     <Compile Include="Random\WH1982Tests.cs" />
     <Compile Include="Random\WH2006Tests.cs" />
     <Compile Include="Random\XorshiftTests.cs" />
-    <Compile Include="RootFindingTests\BrentRootFinderTest.cs" />
+    <Compile Include="RootFindingTests\BrentRootFindingTest.cs" />
     <Compile Include="SortingTests.cs" />
     <Compile Include="SpecialFunctionsTests\ModifiedStruveTests.cs" />
     <Compile Include="SpecialFunctionsTests\ModifiedBesselTests.cs" />