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Better separation of built-in string.Format and Smart.Format features (…
…axuno#175) #### Better separation of built-in string.Format and Smart.Format features 1. Settings.StringFormatCompatibility == true * In this mode, *SmartFormat* is a drop-in replacement for `string.Format` regarding formatting syntax. * Curly braces `{}` **must** be escaped with double braces `{{` and `}}` * The `Parser` will not include the formatter name or formatting options. Like with `string.Format`, everything after the `Selector` separator (colon) is considered as format specifier. * `DefaultFormatter` is the only formatter which will be invoked. * Even in compatibility mode, *SmartFormat* will * Process named `Placeholder`s (beside indexed `Placeholder`s) * have `ISource`s available for `Placeholder`s. * be able to process escaped string literals like \n, \U1234 etc. 2. Settings.StringFormatCompatibility == false * Makes full use of all *SmartFormat* features * Any character can be used, as long as few special characters are escaped with a backslash `\`. These are e.g. `{}()[]():.`. * This leads to a slightly different format string syntax. Example: `string.Format("It is now {0:yyyy/MM/dd HH:mm:ss}, DateTime.Now)` vs. `Smart.Format("It is now {Date:yyyy/MM/dd HH\:mm\:ss}, DateTime.Now)`. 3. All modes * It is possible to use a `System.IFormatProvider` as argument to `Smart.Format` - same as with `string.Format`. This custom format provider can in turn call a `System.ICustomFormatter` for special formatting needs. * This feature is implemented in the `DefaultFormatter`.
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68 changes: 68 additions & 0 deletions
68
src/SmartFormat.Tests/Utilities/CustomFormatProviderTests.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
| using NUnit.Framework; | ||
| using SmartFormat.Extensions; | ||
|
|
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| namespace SmartFormat.Tests.Utilities | ||
| { | ||
| [TestFixture] | ||
| public class CustomFormatProviderTests | ||
| { | ||
| private SmartFormatter GetSimpleFormatter() | ||
| { | ||
| var formatter = new SmartFormatter(); | ||
| formatter.FormatterExtensions.Add(new DefaultFormatter()); | ||
| formatter.SourceExtensions.Add(new ReflectionSource(formatter)); | ||
| formatter.SourceExtensions.Add(new DefaultSource(formatter)); | ||
| return formatter; | ||
| } | ||
|
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| #region *** Format with custom formatter *** | ||
|
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| [TestCase("format", "value", true)] | ||
| [TestCase("tamrof", "eulav", true)] | ||
| [TestCase("format", "value", false)] | ||
| [TestCase("tamrof", "eulav", false)] | ||
| public void Format_With_CustomFormatter(string format, string value, bool stringFormatCompatible) | ||
| { | ||
| var smart = GetSimpleFormatter(); | ||
| smart.Settings.StringFormatCompatibility = stringFormatCompatible; | ||
| var expected = new string(format.Reverse().Select(c => c).ToArray()) + ": " + | ||
| new string(value.Reverse().Select(c => c).ToArray()); | ||
| var resultSmartFormat = smart.Format(new ReverseFormatProvider(), $"{{0:{format}}}", value); | ||
| var resultStringFormat = string.Format(new ReverseFormatProvider(), $"{{0:{format}}}", value); | ||
| Assert.That(resultSmartFormat, Is.EqualTo(expected)); | ||
| Assert.That(resultStringFormat, Is.EqualTo(expected)); | ||
| } | ||
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| /// <summary> | ||
| /// Used for Format_With_CustomFormatter test | ||
| /// </summary> | ||
| public class ReverseFormatProvider : IFormatProvider | ||
| { | ||
| public object GetFormat(Type formatType) | ||
| { | ||
| if (formatType == typeof(ICustomFormatter)) return new ReverseFormatAndArgumentFormatter(); | ||
|
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| return new object(); | ||
| } | ||
| } | ||
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| /// <summary> | ||
| /// Used for Format_With_CustomFormatter test | ||
| /// </summary> | ||
| public class ReverseFormatAndArgumentFormatter : ICustomFormatter | ||
| { | ||
| public string Format(string format, object arg, IFormatProvider formatProvider) | ||
| { | ||
| return new string(format.Reverse().Select(c => c).ToArray()) + ": " + | ||
| new string((arg as string ?? "?").Reverse().Select(c => c).ToArray()); | ||
| } | ||
| } | ||
|
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| #endregion | ||
| } | ||
| } |
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