5 files changed, 75 insertions, 0 deletions
diff --git a/src/Notepad/Infrastructure/Extensions/ConversionExtensions.cs b/src/Notepad/Infrastructure/Extensions/ConversionExtensions.cs
new file mode 100644
index 0000000..0266e58
--- /dev/null
+++ b/src/Notepad/Infrastructure/Extensions/ConversionExtensions.cs
@@ -0,0 +1,7 @@
+namespace Notepad.Infrastructure.Extensions {
+    public static class ConversionExtensions {
+        public static T DowncastTo<T>(this object objectToCast) {
+            return (T) objectToCast;
+        }
+    }
+}
+\ No newline at end of file
diff --git a/src/Notepad/Infrastructure/Extensions/EnumerableExtensions.cs b/src/Notepad/Infrastructure/Extensions/EnumerableExtensions.cs
new file mode 100644
index 0000000..d57c0e1
--- /dev/null
+++ b/src/Notepad/Infrastructure/Extensions/EnumerableExtensions.cs
@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+
+namespace Notepad.Infrastructure.Extensions {
+    public static class EnumerableExtensions {
+        public static void Walk<T>(this IEnumerable<T> itemsToWalk) {
+            foreach (var item in itemsToWalk) {}
+        }
+
+        public static IEnumerable<T> ThatSatisfy<T>(this IEnumerable<T> itemsToPeekInto, Predicate<T> criteriaToSatisfy) {
+            foreach (var item in itemsToPeekInto) {
+                if (item.Satisfies(criteriaToSatisfy)) {
+                    yield return item;
+                }
+            }
+        }
+
+        public static IEnumerable<T> SortedUsing<T>(this IEnumerable<T> itemsToSort, IComparer<T> sortingAlgorithm) {
+            var sortedItems = new List<T>(itemsToSort);
+            sortedItems.Sort(sortingAlgorithm);
+            return sortedItems;
+        }
+    }
+}
+\ No newline at end of file
diff --git a/src/Notepad/Infrastructure/Extensions/LoggingExtensions.cs b/src/Notepad/Infrastructure/Extensions/LoggingExtensions.cs
new file mode 100644
index 0000000..a05e2fc
--- /dev/null
+++ b/src/Notepad/Infrastructure/Extensions/LoggingExtensions.cs
@@ -0,0 +1,17 @@
+using System;
+using Notepad.Infrastructure.Logging;
+
+namespace Notepad.Infrastructure.Extensions {
+    public static class LoggingExtensions {
+        public static void LogError(this Exception errorToLog) {
+            Log.For(errorToLog).Error(errorToLog);
+        }
+
+        public static void LogInformational<T>(
+            this T typeToCreateLoggerFor,
+            string formattedMessage,
+            params object[] arguments) {
+            Log.For(typeToCreateLoggerFor).Informational(formattedMessage, arguments);
+        }
+    }
+}
+\ No newline at end of file
diff --git a/src/Notepad/Infrastructure/Extensions/SpecificationExtensions.cs b/src/Notepad/Infrastructure/Extensions/SpecificationExtensions.cs
new file mode 100644
index 0000000..c7ed7dc
--- /dev/null
+++ b/src/Notepad/Infrastructure/Extensions/SpecificationExtensions.cs
@@ -0,0 +1,14 @@
+using System;
+using Notepad.Infrastructure.Core;
+
+namespace Notepad.Infrastructure.Extensions {
+    public static class SpecificationExtensions {
+        public static bool Satisfies<T>(this T itemToValidate, Predicate<T> criteriaToSatisfy) {
+            return criteriaToSatisfy(itemToValidate);
+        }
+
+        public static bool Satisfies<T>(this T itemToValidate, ISpecification<T> criteriaToSatisfy) {
+            return itemToValidate.Satisfies(criteriaToSatisfy.IsSatisfiedBy);
+        }
+    }
+}
+\ No newline at end of file
diff --git a/src/Notepad/Infrastructure/Extensions/StringExtensions.cs b/src/Notepad/Infrastructure/Extensions/StringExtensions.cs
new file mode 100644
index 0000000..9c19f97
--- /dev/null
+++ b/src/Notepad/Infrastructure/Extensions/StringExtensions.cs
@@ -0,0 +1,13 @@
+using Notepad.Domain.FileSystem;
+
+namespace Notepad.Infrastructure.Extensions {
+    public static class StringExtensions {
+        public static string FormatWith(this string formattedString, params object[] arguments) {
+            return string.Format(formattedString, arguments);
+        }
+
+        public static IFilePath AsAnAbsoluteFilePath(this string rawFilePath) {
+            return new AbsoluteFilePath(rawFilePath);
+        }
+    }
+}
+\ No newline at end of file