Added unit test for TextInput element

Author: magneticflux-

src/test/groovy/com/github/magneticflux/rss/namespaces/standard/elements/TextInputTest.groovy

@@ -0,0 +1,29 @@
+package com.github.magneticflux.rss.namespaces.standard.elements
+
+import com.github.magneticflux.rss.PersisterSpecification
+import spock.lang.Unroll
+
+import static com.github.magneticflux.rss.UrlUtils.testUrl
+
+class TextInputTest extends PersisterSpecification {
+	@Unroll
+	def 'enclosure #object read/write'() {
+
+		expect: 'the output XML equals the given XML'
+		persister.write(object) == xml
+
+		and: 'the input object equals the given object'
+		persister.read(TextInput, xml) == object
+
+		where:
+		title       | description       | name       | link      | xml
+		'testTitle' | 'testDescription' | 'testName' | testUrl() | """<textInput>
+                                                                     |   <title>$title</title>
+                                                                     |   <description>$description</description>
+                                                                     |   <name>$name</name>
+                                                                     |   <link>$link</link>
+                                                                     |</textInput>""".stripMargin()
+
+		object = new TextInput(title, description, name, link)
+	}
+}