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ExpressionRewriterAssertions.cs
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ExpressionRewriterAssertions.cs
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using System;
using System.Collections.Generic;
using System.Linq.Expressions;
using System.Text.RegularExpressions;
using AgileObjects.ReadableExpressions;
using Newtonsoft.Json.Linq;
using Octokit.GraphQL.Core.Builders;
using Xunit;
namespace Octokit.GraphQL.Core.UnitTests
{
public static class ExpressionRewriterAssertions
{
private const string AnonymousType = "AnonymousType";
private static readonly int AnonymousTypeLength = AnonymousType.Length;
public static void AssertExpressionQueryEqual<T>(Expression expected, IQueryableValue<T> actual)
{
var actualCompiledQuery = actual.Compile();
AssertCompiledQueryExpressionEqual(expected, actualCompiledQuery);
}
public static void AssertExpressionQueryEqual<T>(Expression expected, IQueryableList<T> actual)
{
var actualCompiledQuery = actual.Compile();
AssertCompiledQueryExpressionEqual(expected, actualCompiledQuery);
}
public static void AssertExpressionQueryEqual<T>(string expectedString, IQueryableValue<T> actual)
{
var actualCompiledQuery = actual.Compile();
AssertCompiledQueryExpressionEqual(expectedString, actualCompiledQuery);
}
public static void AssertCompiledQueryExpressionEqual<T>(Expression expected, ICompiledQuery<T> actualCompiledQuery, params string[] subqueryPlaceholderReplacements)
{
var expectedString = expected.ToReadableString();
AssertCompiledQueryExpressionEqual(expectedString, actualCompiledQuery, subqueryPlaceholderReplacements);
}
public static void AssertCompiledQueryExpressionEqual<T>(string expectedString, ICompiledQuery<T> actualCompiledQuery, params string[] subqueryPlaceholderReplacements)
{
var actualResultExpression = actualCompiledQuery.GetResultBuilderExpression();
var actualString = actualResultExpression.ToReadableString(settings => settings.NameAnonymousTypesUsing(_ => "object"));
expectedString = ReplaceSubqueryPlaceholders(expectedString, subqueryPlaceholderReplacements);
// hacky fix for anonymous types: actual strings give "new" and expected strings give "new object"
expectedString = StripWhitespace(expectedString);
expectedString = expectedString.Replace("new{", "newobject{");
Assert.Equal(expectedString, StripWhitespace(actualString));
}
public static string ReplaceSubqueryPlaceholders(string expectedString, params string[] subqueryPlaceholderReplacements)
{
foreach (var subqueryPlaceholderReplacement in subqueryPlaceholderReplacements)
{
var regex = new Regex("SubqueryPlaceholder.placeholder");
expectedString = regex.Replace(expectedString, subqueryPlaceholderReplacement, 1);
}
return expectedString;
}
public static string StripWhitespace(string x)
{
return x.Replace(" ", string.Empty).Replace("\r", string.Empty).Replace("\n", string.Empty);
}
public static void AssertSubqueryEqual<T>(Expression<Func<JObject, T>> expectedResultExpression,
Expression<Func<JObject, JToken>> expectedPageInfoExpression,
Expression<Func<JObject, IEnumerable<JToken>>> expectedParentIdExpression,
Expression<Func<JObject, IEnumerable<JToken>>> expectedParentPageInfoExpression,
PagedSubquery<T> subquery)
{
var resultExpression = ExpressionCompiler.GetSourceExpression(subquery.MasterQuery.ResultBuilder);
Assert.Equal(StripWhitespace(expectedResultExpression.ToReadableString()), StripWhitespace(resultExpression.ToReadableString()));
var pageInfoExpression = ExpressionCompiler.GetSourceExpression(subquery.PageInfo);
Assert.Equal(StripWhitespace(expectedPageInfoExpression.ToReadableString()), StripWhitespace(pageInfoExpression.ToReadableString()));
var parentIdExpression = ExpressionCompiler.GetSourceExpression(subquery.ParentIds);
Assert.Equal(StripWhitespace(expectedParentIdExpression.ToReadableString()), StripWhitespace(parentIdExpression.ToReadableString()));
var parentPageInfoExpression = ExpressionCompiler.GetSourceExpression(subquery.ParentPageInfo);
Assert.Equal(StripWhitespace(expectedParentPageInfoExpression.ToReadableString()), StripWhitespace(parentPageInfoExpression.ToReadableString()));
}
}
}