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diff --git a/javatests/com/google/gwtexpui/safehtml/client/SafeHtml_WikifyTest.java b/javatests/com/google/gwtexpui/safehtml/client/SafeHtml_WikifyTest.java
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+++ b/javatests/com/google/gwtexpui/safehtml/client/SafeHtml_WikifyTest.java
@@ -0,0 +1,120 @@
+// Copyright (C) 2009 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "<p>AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.gwtexpui.safehtml.client;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import org.junit.Test;
+
+public class SafeHtml_WikifyTest {
+  @Test
+  public void wikify_OneLine1() {
+    final SafeHtml o = html("A  B");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString()).isEqualTo("<p>A  B</p>");
+  }
+
+  @Test
+  public void wikify_OneLine2() {
+    final SafeHtml o = html("A  B\n");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString()).isEqualTo("<p>A  B\n</p>");
+  }
+
+  @Test
+  public void wikify_OneParagraph1() {
+    final SafeHtml o = html("A\nB");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString()).isEqualTo("<p>A\nB</p>");
+  }
+
+  @Test
+  public void wikify_OneParagraph2() {
+    final SafeHtml o = html("A\nB\n");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString()).isEqualTo("<p>A\nB\n</p>");
+  }
+
+  @Test
+  public void wikify_TwoParagraphs() {
+    final SafeHtml o = html("A\nB\n\nC\nD");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString()).isEqualTo("<p>A\nB</p><p>C\nD</p>");
+  }
+
+  @Test
+  public void linkify_SimpleHttp1() {
+    final SafeHtml o = html("A http://go.here/ B");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString())
+        .isEqualTo(
+            "<p>A <a href=\"http://go.here/\" target=\"_blank\" rel=\"nofollow\""
+                + ">http://go.here/</a> B</p>");
+  }
+
+  @Test
+  public void linkify_SimpleHttps2() {
+    final SafeHtml o = html("A https://go.here/ B");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString())
+        .isEqualTo(
+            "<p>A <a href=\"https://go.here/\" target=\"_blank\" rel=\"nofollow\""
+                + ">https://go.here/</a> B</p>");
+  }
+
+  @Test
+  public void linkify_Parens1() {
+    final SafeHtml o = html("A (http://go.here/) B");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString())
+        .isEqualTo(
+            "<p>A (<a href=\"http://go.here/\" target=\"_blank\" rel=\"nofollow\""
+                + ">http://go.here/</a>) B</p>");
+  }
+
+  @Test
+  public void linkify_Parens() {
+    final SafeHtml o = html("A http://go.here/#m() B");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString())
+        .isEqualTo(
+            "<p>A <a href=\"http://go.here/#m()\" target=\"_blank\" rel=\"nofollow\""
+                + ">http://go.here/#m()</a> B</p>");
+  }
+
+  @Test
+  public void linkify_AngleBrackets1() {
+    final SafeHtml o = html("A <http://go.here/> B");
+    final SafeHtml n = o.wikify();
+    assertThat(o).isNotSameAs(n);
+    assertThat(n.asString())
+        .isEqualTo(
+            "<p>A &lt;<a href=\"http://go.here/\" target=\"_blank\" rel=\"nofollow\""
+                + ">http://go.here/</a>&gt; B</p>");
+  }
+
+  private static SafeHtml html(String text) {
+    return new SafeHtmlBuilder().append(text).toSafeHtml();
+  }
+}