Created LevenshteinMetric, spec, and command.

2 files changed, 96 insertions, 0 deletions

diff --git a/cli/source/core/scala/org/hashtree/stringmetric/cli/command/levenshteinMetric.scala b/cli/source/core/scala/org/hashtree/stringmetric/cli/command/levenshteinMetric.scala
new file mode 100755
index 0000000..5a2d2d6
--- /dev/null
+++ b/cli/source/core/scala/org/hashtree/stringmetric/cli/command/levenshteinMetric.scala
@@ -0,0 +1,57 @@
+package org.hashtree.stringmetric.cli.command
+
+import org.hashtree.stringmetric.{ CaseStringCleaner, LevenshteinMetric, StringCleanerDelegate }
+import org.hashtree.stringmetric.cli._
+import org.hashtree.stringmetric.cli.command._
+
+/**
+ * The levenshteinMetric [[org.hashtree.stringmetric.cli.command.Command]]. Compares the number of characters that two
+ * strings are different from one another via insertion, deletion, and substitution.
+ */
+object levenshteinMetric extends Command {
+	override def main(args: Array[String]): Unit = {
+		val options = OptionMapUtility.toOptionMap(args)
+
+		try {
+			// Help.
+			if (options.contains('h) || options.contains('help)) {
+				help()
+				exit(options)
+			// Execute.
+			} else if (options.contains('dashless) && options('dashless).count(_ == ' ') == 1) {
+				execute(options)
+				exit(options)
+			// Invalid syntax.
+			} else {
+				throw new IllegalArgumentException("Expected valid syntax. See --help.")
+			}
+		} catch {
+			case e => error(e)(options)
+		}
+	}
+
+	override def help(): Unit = {
+		val ls = sys.props("line.separator")
+		val tab = "  "
+
+		println(
+			"Compares the number of characters that two strings are different from one another via insertion, deletion, " +
+			"and substitution." + ls + ls +
+			"Syntax:" + ls +
+			tab + "levenshteinMetric [Options] string1 string2..." + ls + ls +
+			"Options:" + ls +
+			tab + "-h, --help" + ls +
+			tab + tab + "Outputs description, syntax, and options."
+		)
+	}
+
+	override def execute(options: OptionMap): Unit = {
+		val strings = options('dashless).split(" ")
+
+		println(
+			LevenshteinMetric.compare(strings(0),
+				strings(1))(new StringCleanerDelegate with CaseStringCleaner
+			).getOrElse("not comparable").toString
+		)
+	}
+}
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diff --git a/cli/source/test/scala/org/hashtree/stringmetric/cli/command/levenshteinMetricSpec.scala b/cli/source/test/scala/org/hashtree/stringmetric/cli/command/levenshteinMetricSpec.scala
new file mode 100755
index 0000000..77d7187
--- /dev/null
+++ b/cli/source/test/scala/org/hashtree/stringmetric/cli/command/levenshteinMetricSpec.scala
@@ -0,0 +1,39 @@
+package org.hashtree.stringmetric.cli.command
+
+import org.hashtree.stringmetric.ScalaTest
+import org.junit.runner.RunWith
+import org.scalatest.junit.JUnitRunner
+
+@RunWith(classOf[JUnitRunner])
+final class levenshteinMetricSpec extends ScalaTest {
+	"levenshteinMetric" should provide {
+		"main method" when passed {
+			"valid dashless arguments" should executes {
+				"print if they are a match" in {
+					val out = new java.io.ByteArrayOutputStream()
+
+					Console.withOut(out)(
+						levenshteinMetric.main(Array("--unitTest", "--debug", "aBc", "abc"))
+					)
+
+					out.toString should equal ("0\n")
+					out.reset()
+
+					Console.withOut(out)(
+						levenshteinMetric.main(Array("--unitTest", "--debug", "aBc", "xyz"))
+					)
+
+					out.toString should equal ("3\n")
+					out.reset()
+				}
+			}
+			"no dashless arguments" should throws {
+				"IllegalArgumentException" in {
+					evaluating {
+						levenshteinMetric.main(Array("--unitTest", "--debug"))
+					} should produce [IllegalArgumentException]
+				}
+			}
+		}
+	}
+}
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