V9.0.0/netstandard2.0 support replacelineendings #10
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Actionable comments posted: 2
🧹 Outside diff range and nitpick comments (4)
test/Codebelt.Extensions.Xunit.Tests/StringExtensionsTest.cs (1)
13-34: LGTM: Well-structured test with room for expansion.The test method effectively checks the
ReplaceLineEndingsfunctionality for both Windows and Linux line endings. It provides good logging for debugging and usesRuntimeInformationto assert platform-specific results.Consider adding the following test cases to improve coverage:
- Test with a custom replacement string.
- Test with an empty string input.
- Test with a string containing only line endings.
- Test with a string containing no line endings.
Example:
[Fact] public void ReplaceLineEndings_WithCustomReplacement_ShouldReplaceCorrectly() { var input = "Line1\r\nLine2\nLine3"; var expected = "Line1<BR>Line2<BR>Line3"; Assert.Equal(expected, input.ReplaceLineEndings("<BR>")); } [Fact] public void ReplaceLineEndings_WithEmptyString_ShouldReturnEmptyString() { Assert.Equal(string.Empty, string.Empty.ReplaceLineEndings()); }src/Codebelt.Extensions.Xunit/StringExtensions.cs (3)
1-12: Consider revising the namespace name.The namespace
Codebelt.Extensions.Xunitmight be misleading as this file doesn't contain any Xunit-specific code. Consider renaming it to something more generic likeCodebelt.ExtensionsorCodebelt.Extensions.Stringsto better reflect its contents.
15-24: Consider removing or modifying the "stolen" remark.The implementation of
ReplaceLineEndings(string)is correct and well-documented. However, the remark about the source being "shamefully stolen" might not be appropriate for production code. Consider either removing this comment or rephrasing it to acknowledge the inspiration in a more professional manner.
26-42: Well-implemented method with room for minor improvements.The implementation of
ReplaceLineEndings(string, string)is correct, efficient, and well-documented. The use of aValidatorclass for null checks is a good practice. However, consider the following suggestions:
- As mentioned earlier, consider removing or rephrasing the "shamefully stolen" remark.
- For consistency with .NET conventions, consider using
ArgumentNullException.ThrowIfNull(available in .NET 6.0+) instead of the customValidatorclass. If targeting earlier versions, you might want to implement a similar extension method.If targeting .NET 6.0+, you could refactor the null checks like this:
-Validator.ThrowIfNull(input); -Validator.ThrowIfNull(replacementText); +ArgumentNullException.ThrowIfNull(input); +ArgumentNullException.ThrowIfNull(replacementText);If you need to support earlier versions, consider implementing a similar extension method in your
Validatorclass.
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📒 Files selected for processing (2)
- src/Codebelt.Extensions.Xunit/StringExtensions.cs (1 hunks)
- test/Codebelt.Extensions.Xunit.Tests/StringExtensionsTest.cs (1 hunks)
🔇 Additional comments not posted (3)
test/Codebelt.Extensions.Xunit.Tests/StringExtensionsTest.cs (2)
1-6: LGTM: Imports and namespace are appropriate.The imports cover the necessary dependencies for xUnit testing and runtime information. The namespace aligns well with the project structure.
7-11: LGTM: Class definition and constructor are well-structured.The
StringExtensionsTestclass correctly inherits from theTestbase class and properly initializes theITestOutputHelperfor test output logging.src/Codebelt.Extensions.Xunit/StringExtensions.cs (1)
13-13: Well-implemented Regex for newline matching.The
NewLineRegexfield is well-implemented. It uses a compiled Regex for performance and correctly matches all common newline sequences (\r\n,\r,\n). The field is appropriately marked as private and static.
| using System.Runtime.InteropServices; | ||
| using Xunit; | ||
| using Xunit.Abstractions; | ||
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| namespace Codebelt.Extensions.Xunit | ||
| { | ||
| public class StringExtensionsTest : Test | ||
| { | ||
| public StringExtensionsTest(ITestOutputHelper output) : base(output) | ||
| { | ||
| } | ||
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| [Fact] | ||
| public void ReplaceLineEndings_ShouldReplaceNewLineOccurrences() | ||
| { | ||
| var lineEndings = "Windows has \r\n (CRLF) and Linux has \n (LF)"; | ||
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| TestOutput.WriteLine($$""" | ||
| Before: {{lineEndings}} | ||
| After: {{lineEndings.ReplaceLineEndings()}} | ||
| """); | ||
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| TestOutput.WriteLine(RuntimeInformation.OSDescription); | ||
| TestOutput.WriteLine(RuntimeInformation.FrameworkDescription); | ||
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| if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux)) | ||
| { | ||
| Assert.Equal("Windows has \n (CRLF) and Linux has \n (LF)", lineEndings.ReplaceLineEndings()); | ||
| } | ||
| else if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) | ||
| { | ||
| Assert.Equal("Windows has \r\n (CRLF) and Linux has \r\n (LF)", lineEndings.ReplaceLineEndings()); | ||
| } | ||
| } | ||
| } | ||
| } |
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🛠️ Refactor suggestion
Consider expanding test coverage for comprehensive validation.
While the current test provides a good starting point, consider adding the following test methods to ensure comprehensive coverage of the ReplaceLineEndings functionality:
- Test with mixed line endings (CRLF, LF, and CR) in a single string.
- Test with very long strings to ensure performance.
- Test error handling (if applicable) for invalid inputs.
- Test with strings containing Unicode characters.
Example additional test method:
[Fact]
public void ReplaceLineEndings_WithMixedLineEndings_ShouldReplaceAllCorrectly()
{
var input = "Line1\r\nLine2\nLine3\rLine4";
var expected = string.Join(Environment.NewLine, "Line1", "Line2", "Line3", "Line4");
Assert.Equal(expected, input.ReplaceLineEndings());
}Also, consider using [Theory] and [InlineData] attributes for parameterized tests to cover multiple scenarios efficiently.
| #if NETSTANDARD2_0_OR_GREATER | ||
| using System; | ||
| using System.Text.RegularExpressions; | ||
| using Cuemon; | ||
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| namespace Codebelt.Extensions.Xunit | ||
| { | ||
| /// <summary> | ||
| /// Extension methods for the <see cref="string" /> class. | ||
| /// </summary> | ||
| public static class StringExtensions | ||
| { | ||
| private static readonly Regex NewLineRegex = new(@"\r\n|\r|\n", RegexOptions.Compiled); | ||
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| /// <summary> | ||
| /// Replaces all newline sequences in the current string with <see cref="Environment.NewLine"/>. | ||
| /// </summary> | ||
| /// <param name="input">The <see cref="string"/> to extend.</param> | ||
| /// <returns>A string whose contents match the current string, but with all newline sequences replaced with <see cref="Environment.NewLine"/>.</returns> | ||
| /// <remarks>Shamefully stolen from https://github.com/WebFormsCore/WebFormsCore/blob/main/src/WebFormsCore/Util/StringExtensions.cs to support .NET Standard 2.0.</remarks> | ||
| public static string ReplaceLineEndings(this string input) | ||
| { | ||
| return ReplaceLineEndings(input, Environment.NewLine); | ||
| } | ||
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| /// <summary> | ||
| /// Replaces all newline sequences in the current string with <paramref name="replacementText"/>. | ||
| /// </summary> | ||
| /// <param name="input">The <see cref="string"/> to extend.</param> | ||
| /// <param name="replacementText">The text to use as replacement.</param> | ||
| /// <returns>A string whose contents match the current string, but with all newline sequences replaced with <paramref name="replacementText"/>.</returns> | ||
| /// <remarks>Shamefully stolen from https://github.com/WebFormsCore/WebFormsCore/blob/main/src/WebFormsCore/Util/StringExtensions.cs to support .NET Standard 2.0.</remarks> | ||
| /// <exception cref="ArgumentNullException"> | ||
| /// <paramref name="input"/> cannot be null -or- | ||
| /// <paramref name="replacementText"/> cannot be null. | ||
| /// </exception> | ||
| public static string ReplaceLineEndings(this string input, string replacementText) | ||
| { | ||
| Validator.ThrowIfNull(input); | ||
| Validator.ThrowIfNull(replacementText); | ||
| return NewLineRegex.Replace(input, replacementText); | ||
| } | ||
| } | ||
| } | ||
| #endif |
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🛠️ Refactor suggestion
Consider adding a more flexible newline replacement method.
The current implementation is solid and efficient for the most common use cases. However, to provide more flexibility, you might want to consider adding an additional method that allows replacing different newline sequences with different replacement texts. This could be useful in scenarios where more fine-grained control over the replacement is needed.
Here's a suggestion for an additional method:
public static string ReplaceLineEndings(this string input, IDictionary<string, string> replacements)
{
ArgumentNullException.ThrowIfNull(input);
ArgumentNullException.ThrowIfNull(replacements);
return NewLineRegex.Replace(input, match => replacements.TryGetValue(match.Value, out var replacement) ? replacement : match.Value);
}This method would allow users to specify different replacements for different newline sequences, like this:
var replacements = new Dictionary<string, string>
{
{"\r\n", "<CRLF>"},
{"\n", "<LF>"},
{"\r", "<CR>"}
};
string result = input.ReplaceLineEndings(replacements);This addition would provide more flexibility while maintaining the simplicity of the existing methods for common use cases.
Codecov ReportAll modified and coverable lines are covered by tests ✅
Additional details and impacted files@@ Coverage Diff @@
## main #10 +/- ##
==========================================
+ Coverage 73.81% 74.32% +0.51%
==========================================
Files 26 27 +1
Lines 508 522 +14
Branches 43 45 +2
==========================================
+ Hits 375 388 +13
- Misses 129 130 +1
Partials 4 4 ☔ View full report in Codecov by Sentry. |
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gimlichael
deleted the
v9.0.0/netstandard2.0-support-replacelineendings
branch
PR Classification
New feature: Introduces extension methods for the
stringclass to handle newline sequences.PR Summary
Adds new extension methods to the
stringclass for replacing newline sequences and corresponding unit tests.StringExtensions.cs: AddsReplaceLineEndingsmethods for replacing newline sequences withEnvironment.NewLineor custom text.StringExtensionsTest.cs: Adds unit tests usingXunitto verify the functionality ofReplaceLineEndingsmethods across different operating systems.Summary by CodeRabbit
stringclass to replace newline sequences with the system's newline representation or a custom text.