public void Analyze_NumberSymbol_ReturnsIdentifierNode()
{
SyntaxNode node = new IdentifierNode("x");
Environment environment = new Environment();
environment.AddValue("x", 2);
node = SemanticAnalyzer.Analyze(node, environment);
Assert.AreEqual("x", node.ToString());
}
public void GetVariable_Number_ReturnsEnvironmentVariable()
{
Environment environment = new Environment();
environment.AddValue("x", 1);
EnvironmentVariable variable = environment.Get("x");
Assert.AreEqual(EnvironmentVariableType.Number, variable.Type);
Assert.AreEqual(1, variable.Value);
}
public void AddValue_AlreadyDefinedSymbol_ThrowsException()
{
Environment environment = new Environment();
environment.AddValue("x", 2);
DefinedSymbolException exception = Assert.Throws <DefinedSymbolException>(() => {
environment.AddSymbol("x");
});
Assert.AreEqual("Symbol x has already been defined", exception.Message);
}
public void Analyze_AmbigiousValueDistribution_ReturnsOperatorNode()
{
IdentifierNode left = new IdentifierNode("x");
SyntaxNode right = new NumberNode(1);
SyntaxNode root = new FunctionOrDistributionNode(left, right);
Environment environment = new Environment();
environment.AddValue("x", 2);
root = SemanticAnalyzer.Analyze(root, environment);
Assert.AreEqual("x * 1", root.ToString());
}