UA-.NETStandard/Tests/Opc.Ua.SourceGeneration.Core.Tests/Schema/LocalizedTextTests.cs

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 *
 * OPC Foundation MIT License 1.00
 *
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 * obtaining a copy of this software and associated documentation
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using NUnit.Framework;

namespace Opc.Ua.Schema.Model.Tests
{
    /// <summary>
    /// Unit tests for the <see cref="LocalizedText"/> class Equals method.
    /// </summary>
    [TestFixture]
    [Category("ModelDesign")]
    [SetCulture("en-us")]
    [SetUICulture("en-us")]
    [Parallelizable]
    public class LocalizedTextTests
    {
        /// <summary>
        /// Tests that Equals returns false when comparing with null.
        /// </summary>
        [Test]
        public void Equals_NullOther_ReturnsFalse()
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
#pragma warning disable CA1508 // Avoid dead conditional code
            bool result = localizedText.Equals(null);
#pragma warning restore CA1508 // Avoid dead conditional code

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals returns true when comparing an instance with itself.
        /// </summary>
        [Test]
        public void Equals_SameInstance_ReturnsTrue()
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText.Equals(localizedText);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals returns true when comparing two instances with identical property values.
        /// </summary>
        [Test]
        public void Equals_IdenticalValues_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals returns false when the Key property differs.
        /// </summary>
        [Test]
        public void Equals_DifferentKey_ReturnsFalse()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key2",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals returns false when the DoNotIgnore property differs.
        /// </summary>
        [Test]
        public void Equals_DifferentDoNotIgnore_ReturnsFalse()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = false,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals returns false when the Value property differs.
        /// </summary>
        [Test]
        public void Equals_DifferentValue_ReturnsFalse()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value2",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals returns false when the IsAutogenerated property differs.
        /// </summary>
        [Test]
        public void Equals_DifferentIsAutogenerated_ReturnsFalse()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = true
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals handles null Key values correctly.
        /// Verifies that two instances with null Key values are equal if all other properties match.
        /// </summary>
        [Test]
        public void Equals_NullKeyInBoth_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = null,
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = null,
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals returns false when one instance has null Key and the other has a non-null Key.
        /// </summary>
        [Test]
        public void Equals_NullKeyInOneInstance_ReturnsFalse()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = null,
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals handles null Value correctly.
        /// Verifies that two instances with null Value are equal if all other properties match.
        /// </summary>
        [Test]
        public void Equals_NullValueInBoth_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = null,
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = null,
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals returns false when one instance has null Value and the other has a non-null Value.
        /// </summary>
        [Test]
        public void Equals_NullValueInOneInstance_ReturnsFalse()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = null,
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals handles empty string Key values correctly.
        /// Verifies that two instances with empty Key values are equal if all other properties match.
        /// </summary>
        [Test]
        public void Equals_EmptyKeyInBoth_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = string.Empty,
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = string.Empty,
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals handles empty string Value correctly.
        /// Verifies that two instances with empty Value are equal if all other properties match.
        /// </summary>
        [Test]
        public void Equals_EmptyValueInBoth_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = string.Empty,
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = string.Empty,
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals handles whitespace string values correctly in Key property.
        /// Verifies that whitespace is considered a distinct value from empty or other whitespace patterns.
        /// </summary>
        [Test]
        public void Equals_WhitespaceKeyInBoth_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "   ",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "   ",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals handles whitespace string values correctly in Value property.
        /// Verifies that whitespace is considered a distinct value from empty or other whitespace patterns.
        /// </summary>
        [Test]
        public void Equals_WhitespaceValueInBoth_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "   ",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "   ",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals handles special characters in string properties correctly.
        /// Verifies that special characters are properly compared.
        /// </summary>
        [Test]
        public void Equals_SpecialCharactersInStrings_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key\t\r\n\\!@#$%^&*()",
                DoNotIgnore = true,
                Value = "value\t\r\n\\!@#$%^&*()",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key\t\r\n\\!@#$%^&*()",
                DoNotIgnore = true,
                Value = "value\t\r\n\\!@#$%^&*()",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals correctly compares instances with default constructor values.
        /// The default constructor initializes Key to "" and DoNotIgnore to false.
        /// </summary>
        [Test]
        public void Equals_DefaultConstructorValues_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText();
            var localizedText2 = new LocalizedText();

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals correctly handles instances with all boolean combinations.
        /// Verifies equality with both DoNotIgnore and IsAutogenerated set to true.
        /// </summary>
        [Test]
        public void Equals_BothBooleanPropertiesTrue_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = true
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = true
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals correctly handles instances with all properties set to false.
        /// Verifies equality with both DoNotIgnore and IsAutogenerated set to false.
        /// </summary>
        [Test]
        public void Equals_BothBooleanPropertiesFalse_ReturnsTrue()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = false,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = "key1",
                DoNotIgnore = false,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals handles very long string values correctly.
        /// Verifies that string comparison works properly with large strings.
        /// </summary>
        [Test]
        public void Equals_VeryLongStrings_ReturnsTrue()
        {
            // Arrange
            string longString = new('a', 10000);
            var localizedText1 = new LocalizedText
            {
                Key = longString,
                DoNotIgnore = true,
                Value = longString,
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = longString,
                DoNotIgnore = true,
                Value = longString,
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals returns false when comparing very long strings that differ.
        /// Verifies that string comparison correctly identifies differences in large strings.
        /// </summary>
        [Test]
        public void Equals_VeryLongStringsDifferent_ReturnsFalse()
        {
            // Arrange
            string longString1 = new('a', 10000);
            string longString2 = new('b', 10000);
            var localizedText1 = new LocalizedText
            {
                Key = longString1,
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };
            var localizedText2 = new LocalizedText
            {
                Key = longString2,
                DoNotIgnore = true,
                Value = "value1",
                IsAutogenerated = false
            };

            // Act
            bool result = localizedText1.Equals(localizedText2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals(object) returns false when parameter is null.
        /// Verifies null handling in object overload.
        /// Expected result: false.
        /// </summary>
        [Test]
        public void Equals_NullObject_ReturnsFalse()
        {
            // Arrange
            var text = new LocalizedText
            {
                Key = "testKey",
                Value = "testValue"
            };

            // Act
#pragma warning disable CA1508 // Avoid dead conditional code
            bool result = text.Equals((object)null);
#pragma warning restore CA1508 // Avoid dead conditional code

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals(object) returns false when parameter is of different type.
        /// Verifies type checking via 'as' operator cast.
        /// Expected result: false.
        /// </summary>
        [Test]
        public void Equals_DifferentType_ReturnsFalse()
        {
            // Arrange
            var text = new LocalizedText
            {
                Key = "testKey",
                Value = "testValue"
            };
            object differentType = "string object";

            // Act
            bool result = text.Equals(differentType);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals(object) returns true when comparing two instances with identical property values.
        /// Verifies value-based equality comparison.
        /// Expected result: true.
        /// </summary>
        [Test]
        public void Equals_EqualInstances_ReturnsTrue()
        {
            // Arrange
            var text1 = new LocalizedText
            {
                Key = "testKey",
                DoNotIgnore = true,
                Value = "testValue",
                IsAutogenerated = false
            };
            var text2 = new LocalizedText
            {
                Key = "testKey",
                DoNotIgnore = true,
                Value = "testValue",
                IsAutogenerated = false
            };

            // Act
            bool result = text1.Equals((object)text2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals(object) returns true when both instances have null Value and other properties are equal.
        /// Verifies null value handling in equality comparison.
        /// Expected result: true.
        /// </summary>
        [Test]
        public void Equals_BothNullValue_ReturnsTrue()
        {
            // Arrange
            var text1 = new LocalizedText
            {
                Key = "testKey",
                DoNotIgnore = true,
                Value = null,
                IsAutogenerated = false
            };
            var text2 = new LocalizedText
            {
                Key = "testKey",
                DoNotIgnore = true,
                Value = null,
                IsAutogenerated = false
            };

            // Act
            bool result = text1.Equals((object)text2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals(object) returns false when one instance has null Value and the other does not.
        /// Verifies null vs non-null value comparison.
        /// Expected result: false.
        /// </summary>
        [Test]
        public void Equals_OneNullValue_ReturnsFalse()
        {
            // Arrange
            var text1 = new LocalizedText
            {
                Key = "testKey",
                DoNotIgnore = true,
                Value = null,
                IsAutogenerated = false
            };
            var text2 = new LocalizedText
            {
                Key = "testKey",
                DoNotIgnore = true,
                Value = "testValue",
                IsAutogenerated = false
            };

            // Act
            bool result = text1.Equals((object)text2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals(object) returns true when comparing instances with empty string Key and Value.
        /// Verifies handling of empty strings in equality comparison.
        /// Expected result: true.
        /// </summary>
        [Test]
        public void Equals_EmptyStrings_ReturnsTrue()
        {
            // Arrange
            var text1 = new LocalizedText
            {
                Key = string.Empty,
                DoNotIgnore = false,
                Value = string.Empty,
                IsAutogenerated = false
            };
            var text2 = new LocalizedText
            {
                Key = string.Empty,
                DoNotIgnore = false,
                Value = string.Empty,
                IsAutogenerated = false
            };

            // Act
            bool result = text1.Equals((object)text2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals(object) returns true when comparing default-initialized instances.
        /// Verifies equality comparison with default property values.
        /// Expected result: true.
        /// </summary>
        [Test]
        public void Equals_DefaultInstances_ReturnsTrue()
        {
            // Arrange
            var text1 = new LocalizedText();
            var text2 = new LocalizedText();

            // Act
            bool result = text1.Equals((object)text2);

            // Assert
            Assert.That(result, Is.True);
        }

        /// <summary>
        /// Tests that Equals(object) returns false when Key differs by whitespace.
        /// Verifies that whitespace differences are detected.
        /// Expected result: false.
        /// </summary>
        [Test]
        public void Equals_KeyDiffersByWhitespace_ReturnsFalse()
        {
            // Arrange
            var text1 = new LocalizedText
            {
                Key = "testKey",
                DoNotIgnore = false,
                Value = "testValue",
                IsAutogenerated = false
            };
            var text2 = new LocalizedText
            {
                Key = "testKey ",
                DoNotIgnore = false,
                Value = "testValue",
                IsAutogenerated = false
            };

            // Act
            bool result = text1.Equals((object)text2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that Equals(object) returns false when Value differs by case.
        /// Verifies that string comparison is case-sensitive.
        /// Expected result: false.
        /// </summary>
        [Test]
        public void Equals_ValueDiffersByCase_ReturnsFalse()
        {
            // Arrange
            var text1 = new LocalizedText
            {
                Key = "testKey",
                DoNotIgnore = false,
                Value = "TestValue",
                IsAutogenerated = false
            };
            var text2 = new LocalizedText
            {
                Key = "testKey",
                DoNotIgnore = false,
                Value = "testvalue",
                IsAutogenerated = false
            };

            // Act
            bool result = text1.Equals((object)text2);

            // Assert
            Assert.That(result, Is.False);
        }

        /// <summary>
        /// Tests that GetHashCode returns consistent value across multiple invocations for the same object.
        /// Input: LocalizedText with all properties set to default values.
        /// Expected: Hash code remains consistent.
        /// </summary>
        [Test]
        public void GetHashCode_ConsistentInvocations_ReturnsSameHashCode()
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = true,
                Value = "TestValue",
                IsAutogenerated = false
            };

            // Act
            int hashCode1 = localizedText.GetHashCode();
            int hashCode2 = localizedText.GetHashCode();

            // Assert
            Assert.That(hashCode2, Is.EqualTo(hashCode1));
        }

        /// <summary>
        /// Tests that equal objects produce equal hash codes.
        /// Input: Two LocalizedText instances with identical property values.
        /// Expected: Both objects return the same hash code.
        /// </summary>
        [Test]
        public void GetHashCode_EqualObjects_ReturnsSameHashCode()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = true,
                Value = "TestValue",
                IsAutogenerated = false
            };

            var localizedText2 = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = true,
                Value = "TestValue",
                IsAutogenerated = false
            };

            // Act
            int hashCode1 = localizedText1.GetHashCode();
            int hashCode2 = localizedText2.GetHashCode();

            // Assert
            Assert.That(hashCode2, Is.EqualTo(hashCode1));
        }

        /// <summary>
        /// Tests that different Key values produce different hash codes.
        /// Input: Two LocalizedText instances differing only in Key property.
        /// Expected: Different hash codes are returned.
        /// </summary>
        [Test]
        public void GetHashCode_DifferentKey_ReturnsDifferentHashCode()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "Key1",
                DoNotIgnore = false,
                Value = "Value",
                IsAutogenerated = false
            };

            var localizedText2 = new LocalizedText
            {
                Key = "Key2",
                DoNotIgnore = false,
                Value = "Value",
                IsAutogenerated = false
            };

            // Act
            int hashCode1 = localizedText1.GetHashCode();
            int hashCode2 = localizedText2.GetHashCode();

            // Assert
            Assert.That(hashCode2, Is.Not.EqualTo(hashCode1));
        }

        /// <summary>
        /// Tests that different DoNotIgnore values produce different hash codes.
        /// Input: Two LocalizedText instances differing only in DoNotIgnore property.
        /// Expected: Different hash codes are returned.
        /// </summary>
        [Test]
        public void GetHashCode_DifferentDoNotIgnore_ReturnsDifferentHashCode()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = true,
                Value = "TestValue",
                IsAutogenerated = false
            };

            var localizedText2 = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = false,
                Value = "TestValue",
                IsAutogenerated = false
            };

            // Act
            int hashCode1 = localizedText1.GetHashCode();
            int hashCode2 = localizedText2.GetHashCode();

            // Assert
            Assert.That(hashCode2, Is.Not.EqualTo(hashCode1));
        }

        /// <summary>
        /// Tests that different Value values produce different hash codes.
        /// Input: Two LocalizedText instances differing only in Value property.
        /// Expected: Different hash codes are returned.
        /// </summary>
        [Test]
        public void GetHashCode_DifferentValue_ReturnsDifferentHashCode()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = false,
                Value = "Value1",
                IsAutogenerated = false
            };

            var localizedText2 = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = false,
                Value = "Value2",
                IsAutogenerated = false
            };

            // Act
            int hashCode1 = localizedText1.GetHashCode();
            int hashCode2 = localizedText2.GetHashCode();

            // Assert
            Assert.That(hashCode2, Is.Not.EqualTo(hashCode1));
        }

        /// <summary>
        /// Tests that different IsAutogenerated values produce different hash codes.
        /// Input: Two LocalizedText instances differing only in IsAutogenerated property.
        /// Expected: Different hash codes are returned.
        /// </summary>
        [Test]
        public void GetHashCode_DifferentIsAutogenerated_ReturnsDifferentHashCode()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = false,
                Value = "TestValue",
                IsAutogenerated = true
            };

            var localizedText2 = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = false,
                Value = "TestValue",
                IsAutogenerated = false
            };

            // Act
            int hashCode1 = localizedText1.GetHashCode();
            int hashCode2 = localizedText2.GetHashCode();

            // Assert
            Assert.That(hashCode2, Is.Not.EqualTo(hashCode1));
        }

        /// <summary>
        /// Tests GetHashCode with null Key value.
        /// Input: LocalizedText with Key set to null.
        /// Expected: Hash code is computed without throwing exception.
        /// </summary>
        [Test]
        public void GetHashCode_NullKey_ReturnsHashCode()
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = null,
                DoNotIgnore = false,
                Value = "TestValue",
                IsAutogenerated = false
            };

            // Act
            int hashCode = localizedText.GetHashCode();

            // Assert
            Assert.That(hashCode, Is.InstanceOf<int>());
        }

        /// <summary>
        /// Tests GetHashCode with null Value.
        /// Input: LocalizedText with Value set to null.
        /// Expected: Hash code is computed without throwing exception.
        /// </summary>
        [Test]
        public void GetHashCode_NullValue_ReturnsHashCode()
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = false,
                Value = null,
                IsAutogenerated = false
            };

            // Act
            int hashCode = localizedText.GetHashCode();

            // Assert
            Assert.That(hashCode, Is.InstanceOf<int>());
        }

        /// <summary>
        /// Tests GetHashCode with all null string properties.
        /// Input: LocalizedText with Key and Value set to null.
        /// Expected: Hash code is computed without throwing exception.
        /// </summary>
        [Test]
        public void GetHashCode_AllNullStrings_ReturnsHashCode()
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = null,
                DoNotIgnore = false,
                Value = null,
                IsAutogenerated = false
            };

            // Act
            int hashCode = localizedText.GetHashCode();

            // Assert
            Assert.That(hashCode, Is.InstanceOf<int>());
        }

        /// <summary>
        /// Tests GetHashCode with empty string properties.
        /// Input: LocalizedText with Key and Value set to empty strings.
        /// Expected: Hash code is computed correctly.
        /// </summary>
        [Test]
        public void GetHashCode_EmptyStrings_ReturnsHashCode()
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = string.Empty,
                DoNotIgnore = false,
                Value = string.Empty,
                IsAutogenerated = false
            };

            // Act
            int hashCode = localizedText.GetHashCode();

            // Assert
            Assert.That(hashCode, Is.InstanceOf<int>());
        }

        /// <summary>
        /// Tests GetHashCode with whitespace string properties.
        /// Input: LocalizedText with Key and Value set to whitespace strings.
        /// Expected: Hash code is computed correctly.
        /// </summary>
        [Test]
        public void GetHashCode_WhitespaceStrings_ReturnsHashCode()
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = "   ",
                DoNotIgnore = false,
                Value = "   ",
                IsAutogenerated = false
            };

            // Act
            int hashCode = localizedText.GetHashCode();

            // Assert
            Assert.That(hashCode, Is.InstanceOf<int>());
        }

        /// <summary>
        /// Tests GetHashCode with very long string properties.
        /// Input: LocalizedText with Key and Value set to very long strings.
        /// Expected: Hash code is computed correctly.
        /// </summary>
        [Test]
        public void GetHashCode_VeryLongStrings_ReturnsHashCode()
        {
            // Arrange
            string longString = new('A', 10000);
            var localizedText = new LocalizedText
            {
                Key = longString,
                DoNotIgnore = true,
                Value = longString,
                IsAutogenerated = true
            };

            // Act
            int hashCode = localizedText.GetHashCode();

            // Assert
            Assert.That(hashCode, Is.InstanceOf<int>());
        }

        /// <summary>
        /// Tests GetHashCode with special characters in string properties.
        /// Input: LocalizedText with Key and Value containing special characters.
        /// Expected: Hash code is computed correctly.
        /// </summary>
        [Test]
        public void GetHashCode_SpecialCharacters_ReturnsHashCode()
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = "Test\nKey\r\n\t",
                DoNotIgnore = false,
                Value = "Value\0\x01\x1F",
                IsAutogenerated = false
            };

            // Act
            int hashCode = localizedText.GetHashCode();

            // Assert
            Assert.That(hashCode, Is.InstanceOf<int>());
        }

        /// <summary>
        /// Tests that two LocalizedText instances with different combinations of boolean properties produce different hash codes.
        /// Input: Multiple LocalizedText instances with different boolean property combinations.
        /// Expected: Different hash codes for different boolean combinations.
        /// </summary>
        [TestCase(false, false, TestName = "GetHashCode_BooleanCombination_FalseFalse")]
        [TestCase(false, true, TestName = "GetHashCode_BooleanCombination_FalseTrue")]
        [TestCase(true, false, TestName = "GetHashCode_BooleanCombination_TrueTrue")]
        [TestCase(true, true, TestName = "GetHashCode_BooleanCombination_TrueFalse")]
        public void GetHashCode_DifferentBooleanCombinations_ReturnsHashCode(bool doNotIgnore, bool isAutogenerated)
        {
            // Arrange
            var localizedText = new LocalizedText
            {
                Key = "TestKey",
                DoNotIgnore = doNotIgnore,
                Value = "TestValue",
                IsAutogenerated = isAutogenerated
            };

            // Act
            int hashCode = localizedText.GetHashCode();

            // Assert
            Assert.That(hashCode, Is.InstanceOf<int>());
        }

        /// <summary>
        /// Tests that equal LocalizedText instances with null properties produce equal hash codes.
        /// Input: Two LocalizedText instances with identical null properties.
        /// Expected: Same hash code is returned.
        /// </summary>
        [Test]
        public void GetHashCode_EqualObjectsWithNullProperties_ReturnsSameHashCode()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = null,
                DoNotIgnore = true,
                Value = null,
                IsAutogenerated = true
            };

            var localizedText2 = new LocalizedText
            {
                Key = null,
                DoNotIgnore = true,
                Value = null,
                IsAutogenerated = true
            };

            // Act
            int hashCode1 = localizedText1.GetHashCode();
            int hashCode2 = localizedText2.GetHashCode();

            // Assert
            Assert.That(hashCode2, Is.EqualTo(hashCode1));
        }

        /// <summary>
        /// Tests that LocalizedText instances where one has null Key and the other has non-null Key produce different hash codes.
        /// Input: Two LocalizedText instances differing only in Key nullability.
        /// Expected: Different hash codes are returned.
        /// </summary>
        [Test]
        public void GetHashCode_NullVsNonNullKey_ReturnsDifferentHashCode()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = null,
                DoNotIgnore = false,
                Value = "Value",
                IsAutogenerated = false
            };

            var localizedText2 = new LocalizedText
            {
                Key = "Key",
                DoNotIgnore = false,
                Value = "Value",
                IsAutogenerated = false
            };

            // Act
            int hashCode1 = localizedText1.GetHashCode();
            int hashCode2 = localizedText2.GetHashCode();

            // Assert
            Assert.That(hashCode2, Is.Not.EqualTo(hashCode1));
        }

        /// <summary>
        /// Tests that LocalizedText instances where one has null Value and the other has non-null Value produce different hash codes.
        /// Input: Two LocalizedText instances differing only in Value nullability.
        /// Expected: Different hash codes are returned.
        /// </summary>
        [Test]
        public void GetHashCode_NullVsNonNullValue_ReturnsDifferentHashCode()
        {
            // Arrange
            var localizedText1 = new LocalizedText
            {
                Key = "Key",
                DoNotIgnore = false,
                Value = null,
                IsAutogenerated = false
            };

            var localizedText2 = new LocalizedText
            {
                Key = "Key",
                DoNotIgnore = false,
                Value = "Value",
                IsAutogenerated = false
            };

            // Act
            int hashCode1 = localizedText1.GetHashCode();
            int hashCode2 = localizedText2.GetHashCode();

            // Assert
            Assert.That(hashCode2, Is.Not.EqualTo(hashCode1));
        }
    }
}