93 lines
3.5 KiB
C#
93 lines
3.5 KiB
C#
/*
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Copyright 2014 Alex Dyachenko
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This file is part of the MPIR Library.
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The MPIR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 3 of the License, or (at
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your option) any later version.
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The MPIR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the MPIR Library. If not, see http://www.gnu.org/licenses/.
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*/
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Reflection;
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using System.Text;
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using System.Threading.Tasks;
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using Microsoft.VisualStudio.TestTools.UnitTesting;
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namespace MPIR.Tests.HugeRationalTests
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{
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[TestClass]
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public class ExpressionTests
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{
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[TestMethod]
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public void TestAllExpressions()
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{
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var baseExpr = typeof(RationalExpression);
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var allExpressions =
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baseExpr.Assembly.GetTypes()
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.Where(x => baseExpr.IsAssignableFrom(x) && !x.IsAbstract)
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.ToList();
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using (var a = HugeRational.FromLong(-9, 1))
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using (var b = HugeRational.FromLong(4, 1))
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using (var r = MpirRandom.Default())
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{
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var expr = a + (-a * 2) * 3 * (a.Abs() * -2 + -64 + a * a) + 116UL + a;
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VerifyPartialResult(r, expr, 44);
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expr = expr + a * 5 + (a+b) * (b + 1) * (b + -3) * b + (b * -a) - (b * 25UL) - a + (b << 3) - ((a*b) << 1);
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VerifyPartialResult(r, expr, -52);
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expr = expr - 2 - 3UL + (b - (a << 1)) + (b * b - 15UL) * (b - a) * (a - 11) * (b - 3UL) - (-340 - a) + (20UL - b);
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VerifyPartialResult(r, expr, 52);
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expr = expr + (-7 - 2 * a) + (28UL - 4 * b) + -(a + b * 2) + (3 * a).Abs();
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VerifyPartialResult(r, expr, 103);
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expr = expr / a + expr / (3 * b) - a / b - b / (a + 10); //to do: adjust result
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VerifyPartialResult(r, expr, -20);
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expr = expr + (b >> 1);
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VerifyPartialResult(r, expr, -18);
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MarkExpressionsUsed(allExpressions, expr);
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}
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Assert.AreEqual(0, allExpressions.Count, "Expression types not exercised: " + string.Join("",
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allExpressions.Select(x => Environment.NewLine + x.Name).OrderBy(x => x)));
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}
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private void VerifyPartialResult(MpirRandom rnd, RationalExpression expr, long expected)
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{
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rnd.Seed(123);
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using (var r = new HugeRational())
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{
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r.Value = expr;
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Assert.AreEqual(expected.ToString(), r.ToString());
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}
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}
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private void MarkExpressionsUsed(List<Type> allExpressions, RationalExpression expr)
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{
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var type = expr.GetType();
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allExpressions.Remove(type);
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var children = type.GetFields(BindingFlags.NonPublic | BindingFlags.Instance)
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.Where(x => typeof(RationalExpression).IsAssignableFrom(x.FieldType))
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.Select(x => (RationalExpression)x.GetValue(expr))
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.Where(x => x != null)
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.ToList();
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foreach (var childExpr in children)
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MarkExpressionsUsed(allExpressions, childExpr);
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}
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}
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}
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