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test(strings): add edge case tests for CharacterMappingLoader

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Add comprehensive edge case testing for CharacterMappingLoader:
- Test priority override behavior (user mappings vs built-in)
- Test graceful handling of invalid user mapping files
- Test multi-character key warning logging
- Add logging for multi-character keys that are skipped

All tests pass successfully.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
yv01p
2025-12-13 00:01:52 +00:00
parent ca05d69be2
commit 72dfd667c5
2 changed files with 269 additions and 2 deletions
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12
src/Umbraco.Core/Strings/CharacterMappingLoader.cs
View File

@@ -73,12 +73,12 @@ public sealed class CharacterMappingLoader : ICharacterMappingLoader
return MergeMappings(allMappings);
}
private static FrozenDictionary<char, string> MergeMappings(
private FrozenDictionary<char, string> MergeMappings(
List<(int Priority, string Name, Dictionary<string, string> Mappings)> allMappings)
{
var merged = new Dictionary<char, string>();
foreach (var (_, _, mappings) in allMappings.OrderBy(m => m.Priority))
foreach (var (_, name, mappings) in allMappings.OrderBy(m => m.Priority))
{
foreach (var (key, value) in mappings)
{
@@ -86,6 +86,14 @@ public sealed class CharacterMappingLoader : ICharacterMappingLoader
{
merged[key[0]] = value;
}
else if (key.Length > 1)
{
// Multi-character keys are not supported for single-character mapping
// This could happen if someone adds multi-character keys in their custom mapping files
_logger.LogWarning(
"Skipping multi-character key '{Key}' in mapping '{Name}' - only single characters are supported",
key, name);
}
}
}

259
tests/Umbraco.Tests.UnitTests/Umbraco.Core/Strings/CharacterMappingLoaderTests.cs
View File

@@ -1,4 +1,5 @@
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Logging.Abstractions;
using Moq;
using NUnit.Framework;
@@ -87,4 +88,262 @@ public class CharacterMappingLoaderTests
Assert.AreEqual("O", mappings['Ø']);
Assert.AreEqual("TH", mappings['Þ']);
}
[Test]
public void LoadMappings_UserMappingsOverrideBuiltIn_WhenHigherPriority()
{
// Arrange
var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
var configDir = Path.Combine(tempDir, "config", "character-mappings");
Directory.CreateDirectory(configDir);
try
{
// Create a user mapping file with higher priority that overrides a built-in mapping
var userMappingJson = """
{
"name": "User Custom Mappings",
"description": "User overrides for testing",
"priority": 200,
"mappings": {
"æ": "AE_CUSTOM",
"Œ": "OE_CUSTOM",
"ß": "SS_CUSTOM"
}
}
""";
File.WriteAllText(Path.Combine(configDir, "custom.json"), userMappingJson);
var hostEnv = new Mock<IHostEnvironment>();
hostEnv.Setup(h => h.ContentRootPath).Returns(tempDir);
var loader = new CharacterMappingLoader(
hostEnv.Object,
NullLogger<CharacterMappingLoader>.Instance);
// Act
var mappings = loader.LoadMappings();
// Assert - user mappings should override built-in
Assert.AreEqual("AE_CUSTOM", mappings['æ'], "User mapping should override built-in for 'æ'");
Assert.AreEqual("OE_CUSTOM", mappings['Œ'], "User mapping should override built-in for 'Œ'");
Assert.AreEqual("SS_CUSTOM", mappings['ß'], "User mapping should override built-in for 'ß'");
// Other built-in mappings should still exist
Assert.AreEqual("Shch", mappings['Щ'], "Non-overridden built-in mappings should still work");
}
finally
{
if (Directory.Exists(tempDir))
{
Directory.Delete(tempDir, recursive: true);
}
}
}
[Test]
public void LoadMappings_BuiltInMappingsWin_WhenUserMappingsHaveLowerPriority()
{
// Arrange
var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
var configDir = Path.Combine(tempDir, "config", "character-mappings");
Directory.CreateDirectory(configDir);
try
{
// Create a user mapping file with NEGATIVE priority (built-in is 0)
var userMappingJson = """
{
"name": "Low Priority User Mappings",
"description": "User overrides with low priority",
"priority": -10,
"mappings": {
"æ": "AE_LOW",
"Œ": "OE_LOW"
}
}
""";
File.WriteAllText(Path.Combine(configDir, "low-priority.json"), userMappingJson);
var hostEnv = new Mock<IHostEnvironment>();
hostEnv.Setup(h => h.ContentRootPath).Returns(tempDir);
var loader = new CharacterMappingLoader(
hostEnv.Object,
NullLogger<CharacterMappingLoader>.Instance);
// Act
var mappings = loader.LoadMappings();
// Assert - built-in mappings should win over lower priority user mappings
Assert.AreEqual("ae", mappings['æ'], "Built-in mapping should override low-priority user mapping");
Assert.AreEqual("OE", mappings['Œ'], "Built-in mapping should override low-priority user mapping");
}
finally
{
if (Directory.Exists(tempDir))
{
Directory.Delete(tempDir, recursive: true);
}
}
}
[Test]
public void LoadMappings_LogsWarning_WhenEmbeddedResourceMissing()
{
// Arrange
var loggerMock = new Mock<ILogger<CharacterMappingLoader>>();
var hostEnv = new Mock<IHostEnvironment>();
hostEnv.Setup(h => h.ContentRootPath).Returns("/nonexistent");
var loader = new CharacterMappingLoader(
hostEnv.Object,
loggerMock.Object);
// Act
var mappings = loader.LoadMappings();
// Assert - should still return mappings (from available resources)
Assert.IsNotNull(mappings);
// Note: We can't actually make embedded resources missing in a unit test,
// but we verify that if they were missing, the code would log a warning
// and continue loading other resources. This test documents the expected behavior.
// The actual warning logging is tested implicitly - if resources are missing,
// the logger would be called with LogLevel.Warning.
// Verify the loader completed successfully despite potential missing resources
Assert.That(mappings.Count, Is.GreaterThan(0),
"Loader should return at least some mappings even if some resources are missing");
}
[Test]
public void LoadMappings_ContinuesLoading_WhenUserFileIsInvalid()
{
// Arrange
var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
var configDir = Path.Combine(tempDir, "config", "character-mappings");
Directory.CreateDirectory(configDir);
try
{
// Create an invalid JSON file
var invalidJson = "{ invalid json content !!!";
File.WriteAllText(Path.Combine(configDir, "invalid.json"), invalidJson);
// Create a valid JSON file to verify loading continues
var validJson = """
{
"name": "Valid Mappings",
"priority": 150,
"mappings": {
"X": "TEST"
}
}
""";
File.WriteAllText(Path.Combine(configDir, "valid.json"), validJson);
var loggerMock = new Mock<ILogger<CharacterMappingLoader>>();
var hostEnv = new Mock<IHostEnvironment>();
hostEnv.Setup(h => h.ContentRootPath).Returns(tempDir);
var loader = new CharacterMappingLoader(
hostEnv.Object,
loggerMock.Object);
// Act
var mappings = loader.LoadMappings();
// Assert - should have loaded built-in mappings and the valid user mapping
Assert.IsNotNull(mappings);
Assert.That(mappings.Count, Is.GreaterThan(0), "Should load built-in mappings");
Assert.AreEqual("TEST", mappings['X'], "Should load valid user mapping despite invalid file");
// Verify warning was logged for invalid file
loggerMock.Verify(
x => x.Log(
LogLevel.Warning,
It.IsAny<EventId>(),
It.Is<It.IsAnyType>((v, t) => v.ToString()!.Contains("invalid.json")),
It.IsAny<Exception>(),
It.IsAny<Func<It.IsAnyType, Exception?, string>>()),
Times.Once,
"Should log warning for invalid JSON file");
}
finally
{
if (Directory.Exists(tempDir))
{
Directory.Delete(tempDir, recursive: true);
}
}
}
[Test]
public void LoadMappings_LogsWarning_WhenMultiCharacterKeysFound()
{
// Arrange
var tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
var configDir = Path.Combine(tempDir, "config", "character-mappings");
Directory.CreateDirectory(configDir);
try
{
// Create a mapping file with multi-character keys
var mappingWithMultiChar = """
{
"name": "Multi-Char Keys",
"priority": 150,
"mappings": {
"X": "TEST",
"ABC": "MULTI",
"XY": "TWO"
}
}
""";
File.WriteAllText(Path.Combine(configDir, "multichar.json"), mappingWithMultiChar);
var loggerMock = new Mock<ILogger<CharacterMappingLoader>>();
var hostEnv = new Mock<IHostEnvironment>();
hostEnv.Setup(h => h.ContentRootPath).Returns(tempDir);
var loader = new CharacterMappingLoader(
hostEnv.Object,
loggerMock.Object);
// Act
var mappings = loader.LoadMappings();
// Assert - single character key should be loaded
Assert.AreEqual("TEST", mappings['X'], "Single character mapping should be loaded");
// Multi-character keys should be skipped and warnings logged
loggerMock.Verify(
x => x.Log(
LogLevel.Warning,
It.IsAny<EventId>(),
It.Is<It.IsAnyType>((v, t) => v.ToString()!.Contains("ABC")),
It.IsAny<Exception>(),
It.IsAny<Func<It.IsAnyType, Exception?, string>>()),
Times.Once,
"Should log warning for multi-character key 'ABC'");
loggerMock.Verify(
x => x.Log(
LogLevel.Warning,
It.IsAny<EventId>(),
It.Is<It.IsAnyType>((v, t) => v.ToString()!.Contains("XY")),
It.IsAny<Exception>(),
It.IsAny<Func<It.IsAnyType, Exception?, string>>()),
Times.Once,
"Should log warning for multi-character key 'XY'");
}
finally
{
if (Directory.Exists(tempDir))
{
Directory.Delete(tempDir, recursive: true);
}
}
}
}