vstest/test/Microsoft.TestPlatform.Filter.Source.UnitTests/FilterExpressionWrapperTests.cs at d2be9f1a0afb9c2205d1a5631627e149cc3bd3ac · microsoft/vstest · GitHub

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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.

using System;
using System.Collections.Generic;

using Microsoft.VisualStudio.TestPlatform.Common.Filtering;
using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace Microsoft.TestPlatform.Filter.Source.UnitTests;

[TestClass]
public class FilterExpressionWrapperTests
{
    [TestMethod]
    public void ConstructorShouldSetFilterString()
    {
        var filterString = "FullyQualifiedName=Test1";
        var wrapper = new FilterExpressionWrapper(filterString);
        Assert.AreEqual(filterString, wrapper.FilterString);
    }

    [TestMethod]
    public void ParseErrorShouldBeNullForValidFilter()
    {
        var wrapper = new FilterExpressionWrapper("Name=Test1");
        Assert.IsNull(wrapper.ParseError);
    }

    [TestMethod]
    public void ParseErrorShouldBeSetForInvalidFilter()
    {
        var wrapper = new FilterExpressionWrapper("(Name=Test1");
        Assert.IsNotNull(wrapper.ParseError);
    }

    [TestMethod]
    public void EvaluateShouldReturnTrueWhenPropertyMatches()
    {
        var wrapper = new FilterExpressionWrapper("Name=Test1");

        bool result = wrapper.Evaluate(prop => prop == "Name" ? "Test1" : null);

        Assert.IsTrue(result);
    }

    [TestMethod]
    public void EvaluateShouldReturnFalseWhenPropertyDoesNotMatch()
    {
        var wrapper = new FilterExpressionWrapper("Name=Test1");

        bool result = wrapper.Evaluate(prop => prop == "Name" ? "Test2" : null);

        Assert.IsFalse(result);
    }

    [TestMethod]
    public void EvaluateShouldReturnFalseWhenFilterHasParseError()
    {
        var wrapper = new FilterExpressionWrapper("(Name=Test1");

        bool result = wrapper.Evaluate(prop => "Test1");

        Assert.IsFalse(result);
    }

    [TestMethod]
    public void EvaluateShouldSupportAndOperator()
    {
        var wrapper = new FilterExpressionWrapper("Name=Test1&Category=Unit");

        bool result = wrapper.Evaluate(prop => prop switch
        {
            "Name" => "Test1",
            "Category" => "Unit",
            _ => null,
        });

        Assert.IsTrue(result);
    }

    [TestMethod]
    public void EvaluateShouldSupportOrOperator()
    {
        var wrapper = new FilterExpressionWrapper("Name=Test1|Name=Test2");

        bool matchFirst = wrapper.Evaluate(prop => prop == "Name" ? "Test1" : null);
        bool matchSecond = wrapper.Evaluate(prop => prop == "Name" ? "Test2" : null);
        bool matchNeither = wrapper.Evaluate(prop => prop == "Name" ? "Test3" : null);

        Assert.IsTrue(matchFirst);
        Assert.IsTrue(matchSecond);
        Assert.IsFalse(matchNeither);
    }

    [TestMethod]
    public void EvaluateShouldSupportNotEqualOperator()
    {
        var wrapper = new FilterExpressionWrapper("Name!=Test1");

        bool result = wrapper.Evaluate(prop => prop == "Name" ? "Test2" : null);

        Assert.IsTrue(result);
    }

    [TestMethod]
    public void EvaluateShouldSupportContainsOperator()
    {
        var wrapper = new FilterExpressionWrapper("Name~Test");

        bool result = wrapper.Evaluate(prop => prop == "Name" ? "MyTestMethod" : null);

        Assert.IsTrue(result);
    }

    [TestMethod]
    public void ValidForPropertiesShouldReturnNullWhenAllPropertiesAreSupported()
    {
        var wrapper = new FilterExpressionWrapper("Name=Test1");
        var supportedProperties = new List<string> { "Name" };

        string[]? invalidProperties = wrapper.ValidForProperties(supportedProperties);

        Assert.IsNull(invalidProperties);
    }

    [TestMethod]
    public void ValidForPropertiesShouldReturnUnsupportedPropertyNames()
    {
        var wrapper = new FilterExpressionWrapper("UnknownProperty=Value");
        var supportedProperties = new List<string> { "Name", "Category" };

        string[]? invalidProperties = wrapper.ValidForProperties(supportedProperties);

        Assert.IsNotNull(invalidProperties);
        Assert.AreEqual(1, invalidProperties.Length);
        Assert.AreEqual("UnknownProperty", invalidProperties[0]);
    }

    [TestMethod]
    public void FastFilterShouldBeCreatedForSimpleEqualityFilter()
    {
        var wrapper = new FilterExpressionWrapper("Name=Test1");

        Assert.IsNotNull(wrapper.FastFilter);
    }

    [TestMethod]
    public void FastFilterShouldBeNullForComplexFilter()
    {
        var wrapper = new FilterExpressionWrapper("Name=Test1&Name=Test2");

        Assert.IsNull(wrapper.FastFilter);
    }
}