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feat: add string.ConcatIf

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Oliver Booth 2023-04-14 13:55:52 +01:00
parent 63e2f7b69e
commit 6f3a667e37
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3 changed files with 113 additions and 0 deletions

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@ -23,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
- X10D: Added `TextWriter.WriteLineNoAlloc(uint[, ReadOnlySpan<char>[, IFormatProvider]])`. - X10D: Added `TextWriter.WriteLineNoAlloc(uint[, ReadOnlySpan<char>[, IFormatProvider]])`.
- X10D: Added `TextWriter.WriteLineNoAlloc(long[, ReadOnlySpan<char>[, IFormatProvider]])`. - X10D: Added `TextWriter.WriteLineNoAlloc(long[, ReadOnlySpan<char>[, IFormatProvider]])`.
- X10D: Added `TextWriter.WriteLineNoAlloc(ulong[, ReadOnlySpan<char>[, IFormatProvider]])`. - X10D: Added `TextWriter.WriteLineNoAlloc(ulong[, ReadOnlySpan<char>[, IFormatProvider]])`.
- X10D: Added `string.ConcatIf`.
- X10D.Unity: Added `RaycastHit.GetComponent` and `RaycastHit.TryGetComponent`. - X10D.Unity: Added `RaycastHit.GetComponent` and `RaycastHit.TryGetComponent`.
- X10D.Unity: Added `DebugUtility.DrawFunction`, and `DebugUtility.DrawUnjoinedPolyhedron` on which it relies. - X10D.Unity: Added `DebugUtility.DrawFunction`, and `DebugUtility.DrawUnjoinedPolyhedron` on which it relies.

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@ -105,6 +105,44 @@ public class StringTests
Assert.Throws<ArgumentNullException>(() => _ = "Hello World".ChangeEncoding(Encoding.UTF8, null!)); Assert.Throws<ArgumentNullException>(() => _ = "Hello World".ChangeEncoding(Encoding.UTF8, null!));
} }
[Test]
public void ConcatIf_ShouldConcatenateString_GivenTrueCondition()
{
Assert.Multiple(() =>
{
Assert.That("Hello".ConcatIf(true, " World"), Is.EqualTo("Hello World"));
Assert.That("Hello".ConcatIf(true, () => " World"), Is.EqualTo("Hello World"));
Assert.That("Hello".ConcatIf(() => true, " World"), Is.EqualTo("Hello World"));
Assert.That("Hello".ConcatIf(() => true, () => " World"), Is.EqualTo("Hello World"));
});
}
[Test]
public void ConcatIf_ShouldNotConcatenateString_GivenFalseCondition()
{
Assert.Multiple(() =>
{
Assert.That("Hello".ConcatIf(false, " World"), Is.EqualTo("Hello"));
Assert.That("Hello".ConcatIf(false, () => " World"), Is.EqualTo("Hello"));
Assert.That("Hello".ConcatIf(() => false, " World"), Is.EqualTo("Hello"));
Assert.That("Hello".ConcatIf(() => false, () => " World"), Is.EqualTo("Hello"));
});
}
[Test]
public void ConcatIf_ShouldThrowArgumentNullException_GivenNullConditionFactory()
{
Assert.Throws<ArgumentNullException>(() => _ = "".ConcatIf(null!, "Hello World"));
Assert.Throws<ArgumentNullException>(() => _ = "".ConcatIf(null!, () => "Hello World"));
}
[Test]
public void ConcatIf_ShouldThrowArgumentNullException_GivenNullValueFactory()
{
Assert.Throws<ArgumentNullException>(() => _ = "".ConcatIf(true, (Func<string>?)null!));
Assert.Throws<ArgumentNullException>(() => _ = "".ConcatIf(() => true, (Func<string>?)null!));
}
[Test] [Test]
public void CountSubstring_ShouldHonor_StringComparison() public void CountSubstring_ShouldHonor_StringComparison()
{ {

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@ -125,6 +125,80 @@ public static class StringExtensions
return value.GetBytes(sourceEncoding).ToString(destinationEncoding); return value.GetBytes(sourceEncoding).ToString(destinationEncoding);
} }
/// <summary>
/// Appends a string to the current string if the specified condition evaluates to <see langword="true" />.
/// </summary>
/// <param name="value">The current string.</param>
/// <param name="condition">The condition to evaluate.</param>
/// <param name="appendValue">The string to append if the condition is true.</param>
/// <returns>The concatenated string.</returns>
[Pure]
public static string? ConcatIf(this string? value, bool condition, string? appendValue)
{
return condition ? value + appendValue : value;
}
/// <summary>
/// Appends a string to the current string if the specified condition evaluates to <see langword="true" />.
/// </summary>
/// <param name="value">The current string.</param>
/// <param name="conditionFactory">The function that returns the condition to evaluate.</param>
/// <param name="appendValue">The string to append if the condition is true.</param>
/// <returns>The concatenated string.</returns>
/// <exception cref="ArgumentNullException"><paramref name="conditionFactory" /> is <see langword="null" />.</exception>
[Pure]
public static string? ConcatIf(this string? value, Func<bool> conditionFactory, string? appendValue)
{
if (conditionFactory is null)
{
throw new ArgumentNullException(nameof(conditionFactory));
}
return conditionFactory() ? value + appendValue : value;
}
/// <summary>
/// Appends a string to the current string if the specified condition evaluates to <see langword="true" />.
/// </summary>
/// <param name="value">The current string.</param>
/// <param name="condition">The condition to evaluate.</param>
/// <param name="valueFactory">The function that returns the string to append if the condition is true.</param>
/// <returns>The concatenated string.</returns>
[Pure]
public static string? ConcatIf(this string? value, bool condition, Func<string?> valueFactory)
{
if (valueFactory is null)
{
throw new ArgumentNullException(nameof(valueFactory));
}
return condition ? value + valueFactory() : value;
}
/// <summary>
/// Appends a string to the current string if the specified condition evaluates to <see langword="true" />.
/// </summary>
/// <param name="value">The current string.</param>
/// <param name="conditionFactory">The function that returns the condition to evaluate.</param>
/// <param name="valueFactory">The function that returns the string to append if the condition is true.</param>
/// <returns>The concatenated string.</returns>
/// <exception cref="ArgumentNullException"><paramref name="conditionFactory" /> is <see langword="null" />.</exception>
[Pure]
public static string? ConcatIf(this string? value, Func<bool> conditionFactory, Func<string?> valueFactory)
{
if (conditionFactory is null)
{
throw new ArgumentNullException(nameof(conditionFactory));
}
if (valueFactory is null)
{
throw new ArgumentNullException(nameof(valueFactory));
}
return conditionFactory() ? value + valueFactory() : value;
}
/// <summary> /// <summary>
/// Counts the occurrences of a character within the current character span. /// Counts the occurrences of a character within the current character span.
/// </summary> /// </summary>