1 files changed, 75 insertions, 0 deletions
diff --git a/core/source/test/scala/com/rockymadden/stringmetric/similarity/DiceSorensenMetricSpec.scala b/core/source/test/scala/com/rockymadden/stringmetric/similarity/DiceSorensenMetricSpec.scala
new file mode 100755
index 0000000..5ddfc06
--- /dev/null
+++ b/core/source/test/scala/com/rockymadden/stringmetric/similarity/DiceSorensenMetricSpec.scala
@@ -0,0 +1,75 @@
+package com.rockymadden.stringmetric.similarity
+
+import com.rockymadden.stringmetric.ScalaTest
+import org.junit.runner.RunWith
+import org.scalatest.junit.JUnitRunner
+
+@RunWith(classOf[JUnitRunner])
+final class DiceSorensenMetricSpec extends ScalaTest {
+	import DiceSorensenMetricSpec.Metric
+
+	"DiceSorensenMetric" should provide {
+		"compare method" when passed {
+			"empty arguments" should returns {
+				"None" in {
+					Metric.compare("", "")(1).isDefined should be (false)
+					Metric.compare("abc", "")(1).isDefined should be (false)
+					Metric.compare("", "xyz")(1).isDefined should be (false)
+				}
+			}
+			"equal arguments" should returns {
+				"1" in {
+					Metric.compare("abc", "abc")(1).get should be (1)
+					Metric.compare("abc", "abc")(2).get should be (1)
+					Metric.compare("abc", "abc")(3).get should be (1)
+				}
+			}
+			"unequal arguments" should returns {
+				"0" in {
+					Metric.compare("abc", "xyz")(1).get should be (0)
+					Metric.compare("abc", "xyz")(2).get should be (0)
+					Metric.compare("abc", "xyz")(3).get should be (0)
+				}
+			}
+			"invalid arguments" should returns {
+				"None" in {
+					Metric.compare("n", "naght")(2).isDefined should be (false)
+					Metric.compare("night", "n")(2).isDefined should be (false)
+					Metric.compare("ni", "naght")(3).isDefined should be (false)
+					Metric.compare("night", "na")(3).isDefined should be (false)
+				}
+			}
+			"valid arguments" should returns {
+				"Double indicating distance" in {
+					Metric.compare("night", "nacht")(1).get should be (0.6)
+					Metric.compare("night", "naght")(1).get should be (0.8)
+					Metric.compare("context", "contact")(1).get should be (0.7142857142857143)
+
+					Metric.compare("night", "nacht")(2).get should be (0.25)
+					Metric.compare("night", "naght")(2).get should be (0.5)
+					Metric.compare("context", "contact")(2).get should be (0.5)
+					Metric.compare("contextcontext", "contact")(2).get should be (0.3157894736842105)
+					Metric.compare("context", "contactcontact")(2).get should be (0.3157894736842105)
+					Metric.compare("ht", "nacht")(2).get should be (0.4)
+					Metric.compare("xp", "nacht")(2).get should be (0)
+					Metric.compare("ht", "hththt")(2).get should be (0.3333333333333333)
+
+					Metric.compare("night", "nacht")(3).get should be (0)
+					Metric.compare("night", "naght")(3).get should be (0.3333333333333333)
+					Metric.compare("context", "contact")(3).get should be (0.4)
+				}
+			}
+		}
+	}
+	"DiceSorensenMetric companion object" should provide {
+		"pass-through compare method" should returns {
+			"same value as class" in {
+				DiceSorensenMetric.compare("context", "contact")(3).get should be (0.4)
+			}
+		}
+	}
+}
+
+object DiceSorensenMetricSpec {
+	private final val Metric = DiceSorensenMetric()
+}