Case insensitive enumeration reader (#139)

src/main/scala/net/ceedubs/ficus/readers/CaseInsensitiveEnumerationReader.scala

@@ -0,0 +1,7 @@
+package net.ceedubs.ficus.readers
+
+trait CaseInsensitiveEnumerationReader extends EnumerationReader {
+
+  override protected def findEnumValue[T <: Enumeration](enum: T, configValue: String): Option[T#Value] =
+    enum.values.find(_.toString.toLowerCase == configValue.toLowerCase)
+}

src/main/scala/net/ceedubs/ficus/readers/EnumerationReader.scala

@@ -21,8 +21,7 @@ trait EnumerationReader {
       }
 
       val value = config.getString(path)
-      enum.values
-        .find(_.toString == value)
+      findEnumValue(enum, value)
         .getOrElse(
           throw new BadValue(
             config.origin(),
@@ -34,6 +33,9 @@ trait EnumerationReader {
         .asInstanceOf[T#Value]
     }
   }
+
+  protected def findEnumValue[T <: Enumeration](enum: T, configValue: String): Option[T#Value] =
+    enum.values.find(_.toString == configValue)
 }
 
 object EnumerationReader extends EnumerationReader

src/test/scala/net/ceedubs/ficus/readers/CaseInsensitiveEnumerationReadersSpec.scala

@@ -0,0 +1,19 @@
+package net.ceedubs.ficus.readers
+
+import com.typesafe.config.ConfigFactory
+import net.ceedubs.ficus.readers.EnumerationReadersSpec._
+
+import scala.reflect.ClassTag
+
+class CaseInsensitiveEnumerationReadersSpec extends EnumerationReadersSpec with CaseInsensitiveEnumerationReader {
+  override def is = super.is.append(s2"""
+      A case insensitive enumeration value reader should
+        map a string value with different case to its enumeration counterpart $successMixedCaseMapping
+      """)
+
+  def successMixedCaseMapping = {
+    val cfg               = ConfigFactory.parseString("myValue = secOND")
+    implicit val classTag = ClassTag[StringValueEnum.type](StringValueEnum.getClass)
+    enumerationValueReader[StringValueEnum.type].read(cfg, "myValue") must be equalTo StringValueEnum.second
+  }
+}