public void SuccessfullySetFunctionInfo()
{
var function = new LogarithmFunction();
Assert.NotNull(function.FunctionInfo);
Assert.Equal("Logarithm", function.FunctionInfo.Name);
Assert.Equal("Find the logarithm of a number.", function.FunctionInfo.Description);
Assert.Collection(function.FunctionInfo.Tags,
i => Assert.Equal("algebra", i),
i => Assert.Equal("logarithm", i));
}
public void EqualsButDiffRefsTestProgram()
{
var const1 = new Constant(0);
var const2 = new Constant(1);
var const3 = new Constant(3);
var addition = new AdditionFunction(const1, const3);
var subtr = new SubtractionFunction(const2, addition);
var log1 = new LogarithmFunction(subtr, const1);
var log2 = new LogarithmFunction(subtr, const1);
Console.WriteLine($"{log1}, {log2}");
Assert.AreEqual(log1, log2, $"{log1} should be equal to {log2}.");
Assert.AreNotSame(log1, log2, $"{log1} should not be the same as {log2}.");
}
public void TestLogarithm()
{
//Arrange
VariableNode variableNode = new VariableNode();
LogarithmFunction logarithmNode = new LogarithmFunction(variableNode);
//Act
double result1 = logarithmNode.Calculate(1);
double result2 = logarithmNode.Calculate(2);
double result4 = logarithmNode.Calculate(4);
//Assert
Assert.AreEqual(0, result1);
Assert.AreEqual(0.6931, Math.Round(result2, 4));
Assert.AreEqual(1.3863, Math.Round(result4, 4));
}
public void SuccessfullyCalculateALogarithmWithOnlyLogarithmSpecified()
{
var function = new LogarithmFunction();
var inputs = function.GetInputs();
Assert.Equal(2, inputs.Length);
inputs[0].Value = 8;
var result = function.Calculate(inputs);
Assert.Collection(result,
i =>
{
Assert.Equal(typeof(double), i.Value.GetType());
Assert.Equal(Math.Log(8, 10), TypeConverter.ToObject <double>(i.Value));
});
}
