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49 changes: 49 additions & 0 deletions
49
Src/FluentAssertions/Common/MemberPathSegmentEqualityComparer.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| using System.Collections.Generic; | ||
| using System.Text.RegularExpressions; | ||
|
|
||
| namespace FluentAssertions.Common | ||
| { | ||
| /// <summary> | ||
| /// Compares two segments of a <see cref="MemberPath"/>. | ||
| /// Sets the <see cref="AnyIndexQualifier"/> equal with any numeric index qualifier. | ||
| /// All other comparisons are default string equality. | ||
| /// </summary> | ||
| internal class MemberPathSegmentEqualityComparer : IEqualityComparer<string> | ||
| { | ||
| private const string AnyIndexQualifier = "*"; | ||
| private static readonly Regex IndexQualifierRegex = new(@"^\d+$"); | ||
|
|
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| /// <summary> | ||
| /// Compares two segments of a <see cref="MemberPath"/>. | ||
| /// </summary> | ||
| /// <param name="x">Left part of the comparison.</param> | ||
| /// <param name="y">Right part of the comparison.</param> | ||
| /// <returns>True if segments are equal, false if not.</returns> | ||
| public bool Equals(string x, string y) | ||
| { | ||
| if (x == AnyIndexQualifier) | ||
| { | ||
| return IsIndexQualifier(y); | ||
| } | ||
|
|
||
| if (y == AnyIndexQualifier) | ||
| { | ||
| return IsIndexQualifier(x); | ||
| } | ||
|
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| return x == y; | ||
| } | ||
|
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| private static bool IsIndexQualifier(string segment) | ||
| => segment == AnyIndexQualifier || IndexQualifierRegex.IsMatch(segment); | ||
|
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| public int GetHashCode(string obj) | ||
| { | ||
| #if NETCOREAPP2_1_OR_GREATER | ||
| return obj.GetHashCode(System.StringComparison.Ordinal); | ||
| #else | ||
| return obj.GetHashCode(); | ||
| #endif | ||
| } | ||
| } | ||
| } |
75 changes: 75 additions & 0 deletions
75
Src/FluentAssertions/Common/ReadOnlyNonGenericCollectionWrapper.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,75 @@ | ||
| using System; | ||
| using System.Collections; | ||
| using System.Collections.Generic; | ||
| using System.Data; | ||
| using System.Linq; | ||
|
|
||
| namespace FluentAssertions.Common | ||
| { | ||
| internal static class ReadOnlyNonGenericCollectionWrapper | ||
| { | ||
| public static ReadOnlyNonGenericCollectionWrapper<DataTableCollection, DataTable> Create(DataTableCollection collection) | ||
| { | ||
| return | ||
| (collection != null) | ||
| ? new ReadOnlyNonGenericCollectionWrapper<DataTableCollection, DataTable>(collection) | ||
| : null; | ||
| } | ||
|
|
||
| public static ReadOnlyNonGenericCollectionWrapper<DataColumnCollection, DataColumn> Create(DataColumnCollection collection) | ||
| { | ||
| return | ||
| (collection != null) | ||
| ? new ReadOnlyNonGenericCollectionWrapper<DataColumnCollection, DataColumn>(collection) | ||
| : null; | ||
| } | ||
|
|
||
| public static ReadOnlyNonGenericCollectionWrapper<DataRowCollection, DataRow> Create(DataRowCollection collection) | ||
| { | ||
| return | ||
| (collection != null) | ||
| ? new ReadOnlyNonGenericCollectionWrapper<DataRowCollection, DataRow>(collection) | ||
| : null; | ||
| } | ||
| } | ||
|
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| internal class ReadOnlyNonGenericCollectionWrapper<TCollection, TItem> : ICollection<TItem> | ||
| where TCollection : ICollection | ||
| { | ||
| public TCollection UnderlyingCollection { get; } | ||
|
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| public ReadOnlyNonGenericCollectionWrapper(TCollection collection) | ||
| { | ||
| Guard.ThrowIfArgumentIsNull(collection, nameof(collection)); | ||
|
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| UnderlyingCollection = collection; | ||
| } | ||
|
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| public int Count => UnderlyingCollection.Count; | ||
|
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| public bool IsReadOnly => true; | ||
|
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| public IEnumerator<TItem> GetEnumerator() => UnderlyingCollection.Cast<TItem>().GetEnumerator(); | ||
|
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| IEnumerator IEnumerable.GetEnumerator() => UnderlyingCollection.GetEnumerator(); | ||
|
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| public bool Contains(TItem item) => UnderlyingCollection.Cast<TItem>().Contains(item); | ||
|
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| public void CopyTo(TItem[] array, int arrayIndex) => UnderlyingCollection.CopyTo(array, arrayIndex); | ||
|
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| /* | ||
| Mutation is not supported, but these methods must be implemented to satisfy ICollection<T>: | ||
| * Add | ||
| * Clear | ||
| * Remove | ||
| */ | ||
|
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| public void Add(TItem item) => throw new NotSupportedException(); | ||
|
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| public void Clear() => throw new NotSupportedException(); | ||
|
|
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| public bool Remove(TItem item) => throw new NotSupportedException(); | ||
| } | ||
| } |
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