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Jim
2023-05-09 20:31:11 +01:00
parent 9f57a4ab4d
commit b5c318f865
13 changed files with 1174 additions and 0 deletions
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92
MathEngine/EngineTests/Parser Tests/ParserTests.cs Normal file
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using MathEngine.Parser.Tokeniser;
using MathEngine.Parser.Parser;
namespace EngineTests
{
/// <summary>
/// Class for testing the Parser
/// </summary>
[TestClass]
public class ParserTests
{
/// <summary>
/// Test the Parser on a basic List of tokens
/// </summary>
[TestMethod]
public void TestParserBasicExpression()
{
//Arrange
string testString = "3+4";
List<Token> testList = Tokeniser.Tokenise(testString);
Token three = new("3", Token.Type.Numeric, Token.NumericType.Decimal, 0);
Token four = new("4", Token.Type.Numeric, Token.NumericType.Decimal, 0);
Assert.IsNotNull(testList);
Stack<Token> expectedStack = new();
expectedStack.Push(Token.Plus);
expectedStack.Push(four);
expectedStack.Push(three);
//Act
Stack<Token> returnedStack = Parser.Parse(testList);
//Assert
if (returnedStack.Count != expectedStack.Count)
{
Assert.Fail();
}
else
{
while (returnedStack.Count > 0)
{
if (!returnedStack.Pop().Equals(expectedStack.Pop()))
{
Assert.Fail();
}
}
}
}
/// <summary>
/// Test the Parser on a more compilicated basic expression to see if operator precedence is respected
/// </summary>
[TestMethod]
public void TestParserBasicExpressionAllOperators()
{
//Arrange
string testString = "3+4*8-47.2/9";
List<Token> testList = Tokeniser.Tokenise(testString);
Token three = new("3", Token.Type.Numeric, Token.NumericType.Decimal, 0);
Token four = new("4", Token.Type.Numeric, Token.NumericType.Decimal, 0);
Token eight = new("8", Token.Type.Numeric, Token.NumericType.Decimal, 0);
Token nine = new("9", Token.Type.Numeric, Token.NumericType.Decimal, 0);
Token fourSevenPoint2 = new("47.2", Token.Type.Numeric, Token.NumericType.Decimal, 0);
Assert.IsNotNull(testList);
Stack<Token> expectedStack = new();
expectedStack.Push(Token.Minus);
expectedStack.Push(Token.Divide);
expectedStack.Push(nine);
expectedStack.Push(fourSevenPoint2);
expectedStack.Push(Token.Plus);
expectedStack.Push(Token.Multiply);
expectedStack.Push(eight);
expectedStack.Push(four);
expectedStack.Push(three);
//Act
Stack<Token> returnedStack = Parser.Parse(testList);
//Assert
if (returnedStack.Count != expectedStack.Count)
{
Assert.Fail();
}
else
{
while (returnedStack.Count > 0)
{
if (!returnedStack.Pop().Equals(expectedStack.Pop()))
{
Assert.Fail();
}
}
}
}
}
}