public void GetVariable_Function_ReturnsEnvironmentVariable()
{
Environment environment = new Environment();
environment.AddFunction("x", null);
EnvironmentVariable variable = environment.Get("x");
Assert.AreEqual(EnvironmentVariableType.Function, variable.Type);
}
public void AddFunction_AlreadyDefinedSymbol_ThrowsException()
{
Environment environment = new Environment();
DefinedSymbolException exception = Assert.Throws <DefinedSymbolException>(() => {
environment.AddFunction("sin", null);
});
Assert.AreEqual("Symbol sin has already been defined", exception.Message);
}
public void Simplify_OperatorWithNumberAndFunction_ReturnsOperatorNode()
{
Environment environment = new Environment();
environment.AddSymbol("x");
environment.AddFunction("f", GetExpression("x", environment));
SyntaxNode node = GetExpression("2 + f(x)", environment);
node = OperatorSimplification.Simplify((OperatorNode)node, environment);
Assert.NotNull(node);
Assert.AreEqual("2 + f(x)", node.ToString());
}
public void Analyze_AmbigiousFunction_ReturnsFunctionNode()
{
IdentifierNode left = new IdentifierNode("x");
SyntaxNode right = new NumberNode(1);
SyntaxNode root = new FunctionOrDistributionNode(left, right);
Environment environment = new Environment();
environment.AddFunction("x", null);
root = SemanticAnalyzer.Analyze(root, environment);
Assert.AreEqual("x(1)", root.ToString());
}