slug update

src/main/java/io/spring/core/article/Article.java

@@ -57,6 +57,6 @@ public class Article {
     }
 
     private String toSlug(String title) {
-        return title.toLowerCase().replace(' ', '-');
+        return title.toLowerCase().replaceAll("[\\&|[\\uFE30-\\uFFA0]|\\’|\\”|\\s\\?\\,\\.]+", "-");
     }
 }

src/test/java/io/spring/core/article/ArticleTest.java

@@ -0,0 +1,39 @@
+package io.spring.core.article;
+
+import org.junit.Test;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+public class ArticleTest {
+
+    @Test
+    public void should_get_right_slug() throws Exception {
+        Article article = new Article("a new   title", "desc", "body", new String[]{"java"}, "123");
+        assertThat(article.getSlug(), is("a-new-title"));
+    }
+
+    @Test
+    public void should_get_right_slug_with_number_in_title() throws Exception {
+        Article article = new Article("a new title 2", "desc", "body", new String[]{"java"}, "123");
+        assertThat(article.getSlug(), is("a-new-title-2"));
+    }
+
+    @Test
+    public void should_get_lower_case_slug() throws Exception {
+        Article article = new Article("A NEW TITLE", "desc", "body", new String[]{"java"}, "123");
+        assertThat(article.getSlug(), is("a-new-title"));
+    }
+
+    @Test
+    public void should_handle_other_language() throws Exception {
+        Article article = new Article("中文：标题", "desc", "body", new String[]{"java"}, "123");
+        assertThat(article.getSlug(), is("中文-标题"));
+    }
+
+    @Test
+    public void should_handle_commas() throws Exception {
+        Article article = new Article("what?the.hell,w", "desc", "body", new String[]{"java"}, "123");
+        assertThat(article.getSlug(), is("what-the-hell-w"));
+    }
+}