public void UndefVarTest()
{
var parameters = new ParameterCollection { { "a", 1 } };
var undef = new Undefine(new Variable("a"));
undef.Execute(parameters);
Assert.False(parameters.ContainsKey("a"));
}
public void UndefConstTest()
{
var parameters = new ParameterCollection();
var undef = new Undefine(new Variable("π"));
Assert.Throws<ArgumentException>(() => undef.Execute(parameters));
}
public void UndefFuncWithParamsTest()
{
var key1 = new UserFunction("f", new IExpression[0], 0);
var key2 = new UserFunction("f", 1);
var functions = new FunctionCollection { { key1, new Number(1) }, { key2, new Number(2) } };
var undef = new Undefine(key2);
var result = undef.Execute(functions);
Assert.True(functions.ContainsKey(key1));
Assert.False(functions.ContainsKey(key2));
Assert.Equal("The 'f(x1)' function is removed.", result);
}
