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CodeIndexerExpressionTests.cs
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CodeIndexerExpressionTests.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Generic;
using System.Linq;
using Xunit;
namespace System.CodeDom.Tests
{
public class CodeIndexerExpressionTests : CodeObjectTestBase<CodeIndexerExpression>
{
[Fact]
public void Ctor_Default()
{
var indexer = new CodeIndexerExpression();
Assert.Null(indexer.TargetObject);
Assert.Empty(indexer.Indices);
}
public static IEnumerable<object[]> Ctor_CodeExpression_ParamsCodeExpression_TestData()
{
yield return new object[] { null, new CodeExpression[0] };
yield return new object[] { new CodePrimitiveExpression(""), new CodeExpression[] { new CodePrimitiveExpression() } };
yield return new object[] { new CodePrimitiveExpression("Hello"), new CodeExpression[] { new CodePrimitiveExpression("Value1") } };
}
[Theory]
[MemberData(nameof(Ctor_CodeExpression_ParamsCodeExpression_TestData))]
public void Ctor_CodeExpression_ParamsCodeExpression(CodeExpression targetObject, CodeExpression[] parameters)
{
var indexer = new CodeIndexerExpression(targetObject, parameters);
Assert.Equal(targetObject, indexer.TargetObject);
Assert.Equal(parameters, indexer.Indices.Cast<CodeExpression>());
}
[Fact]
public void Ctor_NullIndices_ThrowsArgumentNullException()
{
AssertExtensions.Throws<ArgumentNullException>("value", () => new CodeIndexerExpression(new CodePrimitiveExpression("Hello"), null));
}
[Fact]
public void Ctor_NullObjectInIndices_ThrowsArgumentNullException()
{
CodeExpression[] parameters = new CodeExpression[] { null };
AssertExtensions.Throws<ArgumentNullException>("value", () => new CodeIndexerExpression(new CodePrimitiveExpression("Hello"), parameters));
}
[Theory]
[MemberData(nameof(CodeExpression_TestData))]
public void TargetObject_Set_Get_ReturnsExpected(CodeExpression value)
{
var indexer = new CodeIndexerExpression();
indexer.TargetObject = value;
Assert.Equal(value, indexer.TargetObject);
}
[Fact]
public void Parameters_AddMultiple_ReturnsExpected()
{
var indexer = new CodeIndexerExpression();
CodeExpression expression1 = new CodePrimitiveExpression("Value1");
indexer.Indices.Add(expression1);
Assert.Equal(new CodeExpression[] { expression1 }, indexer.Indices.Cast<CodeExpression>());
CodeExpression expression2 = new CodePrimitiveExpression("Value2");
indexer.Indices.Add(expression2);
Assert.Equal(new CodeExpression[] { expression1, expression2 }, indexer.Indices.Cast<CodeExpression>());
}
}
}