Fully implemented the windows registry-based settings store; added more unit tests for the registry settings store

git-svn-id: file:///srv/devel/repo-conversion/nusu@319 d2e56fa2-650e-0410-a79f-9358c0239efd

Source/Settings/WindowsRegistryStore.Test.cs

@@ -18,15 +18,15 @@ License along with this library
 */
 #endregion
 
-#if UNITTEST
+#if UNITTEST && WINDOWS
 
 using System;
+using System.Collections.Generic;
+using System.Globalization;
+
+using Microsoft.Win32;
 
 using NUnit.Framework;
-using System.IO;
-using Microsoft.Win32;
-using System.Globalization;
-using System.Collections.Generic;
 
 namespace Nuclex.Support.Settings {
 
@@ -179,6 +179,76 @@ namespace Nuclex.Support.Settings {
 
         var optionInfos = new List<OptionInfo>(context.Store.EnumerateOptions(null));
         Assert.That(optionInfos.Count, Is.EqualTo(3));
+
+        string[] actualNames = new string[] {
+          optionInfos[0].Name, optionInfos[1].Name, optionInfos[2].Name
+        };
+        Assert.That(actualNames, Is.EquivalentTo(names));
+      }
+    }
+
+    /// <summary>
+    ///   Verifies that accessing an option that doesn't exist throws an exception
+    /// </summary>
+    [Test]
+    public void AccessingNonExistingOptionThrowsException() {
+      using(var context = new TestContext()) {
+        Assert.That(
+          () => context.Store.Get<string>(null, "doesn't exist"),
+          Throws.Exception.AssignableTo<KeyNotFoundException>()
+        );
+      }
+    }
+
+    /// <summary>
+    ///   Verifies that accessing a category that doesn't exist throws an exception
+    /// </summary>
+    [Test]
+    public void AccessingNonExistingCategoryThrowsException() {
+      using(var context = new TestContext()) {
+        Assert.That(
+          () => context.Store.Get<string>("doesn't exist", "test"),
+          Throws.Exception.AssignableTo<KeyNotFoundException>()
+        );
+      }
+    }
+
+    /// <summary>
+    ///   Verifies that values can be removed from a registry key
+    /// </summary>
+    [Test]
+    public void ValuesCanBeRemovedFromRoot() {
+      using(var context = new TestContext()) {
+        context.Store.Set(null, "nothing", "short-lived");
+        Assert.That(context.Store.Remove(null, "nothing"), Is.True);
+        Assert.That(context.Store.Remove(null, "nothing"), Is.False);
+
+        Assert.That(context.Store.EnumerateOptions(), Is.Empty);
+      }
+    }
+
+    /// <summary>
+    ///   Verifies that values can be removed from the subkey of a registry key
+    /// </summary>
+    [Test]
+    public void ValuesCanBeRemovedFromCategory() {
+      using(var context = new TestContext()) {
+        context.Store.Set("limbo", "nothing", "short-lived");
+        Assert.That(context.Store.Remove("limbo", "nothing"), Is.True);
+        Assert.That(context.Store.Remove("limbo", "nothing"), Is.False);
+
+        Assert.That(context.Store.EnumerateOptions("limbo"), Is.Empty);
+      }
+    }
+
+    /// <summary>
+    ///   Verifies that values can be removed from a non-existing subkey without
+    ///   causing an error
+    /// </summary>
+    [Test]
+    public void RemovingValueFromNonExistingCategoryCanBeHandled() {
+      using(var context = new TestContext()) {
+        Assert.That(context.Store.Remove("empty", "nothing"), Is.False);
       }
     }
 

Source/Settings/WindowsRegistryStore.cs

@@ -131,11 +131,11 @@ namespace Nuclex.Support.Settings {
       if(string.IsNullOrEmpty(category)) {
         return tryGetValueFromKey(this.rootKey, optionName, out value);
       } else {
-				RegistryKey categoryKey = this.rootKey.OpenSubKey(category, this.writable);
-				if(categoryKey == null) {
-					value = default(TValue);
-					return false;
-				}
+        RegistryKey categoryKey = this.rootKey.OpenSubKey(category, this.writable);
+        if(categoryKey == null) {
+          value = default(TValue);
+          return false;
+        }
         using(categoryKey) {
           return tryGetValueFromKey(categoryKey, optionName, out value);
         }
@@ -151,16 +151,38 @@ namespace Nuclex.Support.Settings {
       if(string.IsNullOrEmpty(category)) {
         setValue(this.rootKey, optionName, value);
       } else {
-				RegistryKey categoryKey = this.rootKey.OpenSubKey(category, this.writable);
-				if(categoryKey == null) {
-					categoryKey = this.rootKey.CreateSubKey(category);
-				}
+        RegistryKey categoryKey = this.rootKey.OpenSubKey(category, this.writable);
+        if(categoryKey == null) {
+          categoryKey = this.rootKey.CreateSubKey(category);
+        }
         using(categoryKey) {
           setValue(categoryKey, optionName, value);
         }
       }
     }
 
+    /// <summary>Removes the option with the specified name</summary>
+    /// <param name="category">Category the option is found in. Can be null.</param>
+    /// <param name="optionName">Name of the option that will be removed</param>
+    /// <returns>True if the option was found and removed</returns>
+    public bool Remove(string category, string optionName) {
+      if(string.IsNullOrEmpty(category)) {
+        object value = this.rootKey.GetValue(optionName);
+        this.rootKey.DeleteValue(optionName, throwOnMissingValue: false);
+        return (value != null);
+      } else {
+        RegistryKey categoryKey = this.rootKey.OpenSubKey(category, this.writable);
+        if(categoryKey == null) {
+          return false;
+        }
+        using(categoryKey) {
+          object value = categoryKey.GetValue(optionName);
+          categoryKey.DeleteValue(optionName, throwOnMissingValue: false);
+          return (value != null);
+        }
+      }
+    }
+
     /// <summary>Writes a setting to the registry</summary>
     /// <typeparam name="TValue"></typeparam>
     /// <param name="registryKey"></param>
@@ -187,14 +209,6 @@ namespace Nuclex.Support.Settings {
       }
     }
 
-    /// <summary>Removes the option with the specified name</summary>
-    /// <param name="category">Category the option is found in. Can be null.</param>
-    /// <param name="optionName">Name of the option that will be removed</param>
-    /// <returns>True if the option was found and removed</returns>
-    public bool Remove(string category, string optionName) {
-      throw new NotImplementedException();
-    }
-
     /// <summary>Tries to retrieve the value of a registry key if it exists</summary>
     /// <typeparam name="TValue">Type of value the registry key is expected to have</typeparam>
     /// <param name="categoryKey">Registry key the value is stored under</param>
@@ -228,33 +242,7 @@ namespace Nuclex.Support.Settings {
         case RegistryValueKind.QWord: { return typeof(long); }
         case RegistryValueKind.MultiString: { return typeof(string[]); }
         case RegistryValueKind.ExpandString:
-        case RegistryValueKind.String: {
-          string value = (string)categoryKey.GetValue(optionName);
-          if(value.Length == 0) {
-            return typeof(string);
-          }
-
-          // If there are at least two characters, it may be an integer with
-          // a sign in front of it
-          if(value.Length >= 2) {
-            int index = 0;
-            if(ParserHelper.SkipInteger(value, ref index)) {
-              if(index >= value.Length) {
-                return typeof(int);
-              }
-              if(value[index] == '.') {
-                return typeof(float);
-              }
-            }
-          } else { // If it's just a single character, it may be a number
-            if(char.IsNumber(value, 0)) {
-              return typeof(int);
-            }
-          }
-
-          return typeof(string);
-        }
-
+        case RegistryValueKind.String: { return typeof(string); }
         case RegistryValueKind.Unknown:
         case RegistryValueKind.None:
         default: { return typeof(string); }