diff --git a/bibtexbrowser-test.php b/bibtexbrowser-test.php
new file mode 100755
index 0000000..6c009a3
--- /dev/null
+++ b/bibtexbrowser-test.php
@@ -0,0 +1,198 @@
+<?php
+/** PhPUnit tests for bibtexbrowser
+
+To run them:
+$ phpunit bibtexbrowser-test.php 
+
+With coverage:
+$ phpunit --coverage-html ./coverage btb-test.php 
+
+(be sure that xdebug is enabled: /etc/php5/cli/conf.d# ln -s ../../mods-available/xdebug.ini)
+*/
+
+$_GET['library']=1;
+
+require_once ('bibtexbrowser.php');
+
+error_reporting(E_ALL);
+
+class BTBTest extends PHPUnit_Framework_TestCase {
+
+  function setUp() {
+    $test_data = fopen('php://memory','x+');
+    fwrite($test_data, "@book{aKey,title={A Book},author={Martin Monperrus},publisher={Springer},year=2009}\n".
+    "@book{aKey/withSlash,title={Slash Dangerous for web servers},author={Ap Ache},publisher={Springer},year=2009}\n"
+    );
+    fseek($test_data,0);
+    $this->btb = new BibDataBase();
+    $this->btb->update_internal("inline", $test_data);
+  }
+
+
+  function test_bibentry_to_html() {
+    $first_entry=$this->btb->bibdb[array_keys($this->btb->bibdb)[0]];
+    $this->assertEquals('<span class="bibmenu"><a class="biburl" title="aKey" href="bibtexbrowser.php?key=aKey&amp;bib=inline">[bibtex]</a></span>',$first_entry->bib2links());
+    $this->assertEquals('<a class="bibanchor" name=""></a>',$first_entry->anchor());
+  }
+
+  function testMultiSearch() {
+    $q=array(Q_AUTHOR=>'monperrus');
+    $results=$this->btb->multisearch($q);
+    $entry = $results[0];
+    $this->assertTrue(count($results) == 1);
+    $this->assertTrue($entry->getTitle() == 'A Book');
+  }
+  
+  function testMultiSearch2() {
+    $q=array(Q_AUTHOR=>'monperrus|ducasse');
+    $results=$this->btb->multisearch($q);
+    $entry = $results[0];
+    $this->assertTrue(count($results) == 1);
+    $this->assertTrue($entry->getTitle() == 'A Book');
+  }
+
+  function test_config_value() {
+    // default value
+    $this->assertFalse(config_value('BIBTEXBROWSER_NO_DEFAULT'));       
+    
+    // setting to true
+    bibtexbrowser_configure('BIBTEXBROWSER_NO_DEFAULT', true);
+    $this->assertTrue(config_value('BIBTEXBROWSER_NO_DEFAULT'));      
+    ob_start();
+    default_message();
+    $this->assertEquals('', ob_get_flush());
+
+    // setting to false
+    bibtexbrowser_configure('BIBTEXBROWSER_NO_DEFAULT', false);
+    $this->assertFalse(config_value('BIBTEXBROWSER_NO_DEFAULT'));      
+    ob_start();
+    default_message();
+    $this->assertContains('Congratulations', ob_get_flush());
+  }
+
+  function testInternationalization() {
+    global $BIBTEXBROWSER_LANG;
+    $BIBTEXBROWSER_LANG=array();
+    $BIBTEXBROWSER_LANG['Refereed Conference Papers']="foo";
+    $this->assertEquals("foo",__("Refereed Conference Papers"));
+    
+    $BIBTEXBROWSER_LANG['Books']="Livres";
+    $d = new AcademicDisplay();
+    $d->setDB($this->btb);
+    ob_start();
+    $d->display();
+    $data = ob_get_flush();
+    $this->assertContains('Livres', $data);
+  }
+
+  
+  function testNoSlashInKey() {
+    $q=array(Q_SEARCH=>'Slash');
+    $results=$this->btb->multisearch($q);
+    $this->assertTrue(count($results) == 1);
+    $entry = $results[0];
+    $this->assertContains("aKey-withSlash",$entry->toHTML());
+
+    $q=array(Q_KEY=>'aKey-withSlash');
+    $results=$this->btb->multisearch($q);
+    $entry2 = $results[0];
+    $this->assertSame($entry2,$entry);
+  }
+  
+  function test_string_should_be_deleted_after_update() {
+    $test_data = fopen('php://memory','x+');
+    fwrite($test_data, "@book{aKey,title={A Book},author={Martin Monperrus},publisher={Springer},year=2009}\n".
+    "@String{x=2008}\n"
+    );
+    fseek($test_data,0);
+    $btb = new BibDataBase();
+    $btb->update_internal("inline", $test_data);
+//     print_r($btb->stringdb);
+    $this->assertEquals(1,count($btb->stringdb));
+    
+    // replacing the existing one
+    $test_data = fopen('php://memory','x+');
+    fwrite($test_data, "@book{aKey2,title={A Book},author={Martin Monperrus},publisher={Springer},year=2009}\n".
+    "@String{x=2009}\n"
+    );
+    fseek($test_data,0);
+    $btb = new BibDataBase();
+    $btb->update_internal("inline2", $test_data);
+//     print_r($btb->stringdb);
+    $this->assertEquals(1,count($btb->stringdb));
+    $this->assertEquals("2009",$btb->stringdb['x']->value);// 
+
+    // now adding another one and removing the string
+    $test_data2 = fopen('php://memory','x+');
+    fwrite($test_data2, "@book{aKey,title={A Book},author={Martin Monperrus},publisher={Springer},year=2009}\n".
+    "@String{y=2010}\n"
+    );
+    fseek($test_data2,0);    
+    $btb->update_internal("inline2", $test_data2);
+    $this->assertEquals(1,count($btb->stringdb));// 
+    $this->assertEquals("2010",$btb->stringdb['y']->value);// 
+
+  }
+
+  function test_google_scholar_metadata() {
+    $test_data = fopen('php://memory','x+');
+    fwrite($test_data, "@article{aKey,title={A Book},author={Martin Monperrus},publisher={Springer},year=2009,pages={42--4242},number=1}\n".
+    "@String{x=2008}\n"
+    );
+    fseek($test_data,0);
+    $db = new BibDataBase();
+    $db->update_internal("inline", $test_data);
+    $dis = new BibEntryDisplay($db->getEntryByKey('aKey'));
+    $metadata = $dis->metadata_dict();
+    //print_r($metadata);
+    $this->assertEquals("A Book",$metadata['citation_title']);
+    $this->assertEquals("2009",$metadata['citation_date']);
+    $this->assertEquals("2009",$metadata['citation_year']);
+    $this->assertEquals("42",$metadata['citation_firstpage']);
+    $this->assertEquals("4242",$metadata['citation_lastpage']);
+    $this->assertEquals("1",$metadata['citation_issue']);
+    
+  }
+  
+  function test_math_cal() {
+    $test_data = fopen('php://memory','x+');
+    fwrite($test_data, "@book{aKey,title={{A Book{} $\mbox{foo}$ tt $\boo{t}$}} ,author={Martin Monperrus},publisher={Springer},year=2009}\n".
+    "@String{x=2008}\n"
+    );
+    fseek($test_data,0);
+    $btb = new BibDataBase();
+    $btb->update_internal("inline", $test_data);    
+    $first_entry=$btb->bibdb[array_keys($btb->bibdb)[0]];
+//    $this->assertTrue(strpos('A Book{} $\mbox{foo}$',$first_entry->toHTML());    
+    $this->assertEquals('A Book $\mbox{foo}$ tt $\boo{t}$',$first_entry->getTitle());    
+  }
+  
+  function test_link_configuration() {
+    $test_data = fopen('php://memory','x+');
+    fwrite($test_data, "@book{aKey,pdf={myarticle.pdf}}\n"
+    );
+    fseek($test_data,0);
+    $btb = new BibDataBase();
+    $btb->update_internal("inline", $test_data);    
+    $first_entry=$btb->bibdb[array_keys($btb->bibdb)[0]];
+    $this->assertEquals('<a href="myarticle.pdf">[pdf]</a>',$first_entry->getLink('pdf'));    
+    $this->assertEquals('<a href="myarticle.pdf">[pdf]</a>',$first_entry->getUrlLink());    
+    $this->assertEquals('<a href="myarticle.pdf"><img class="icon" src="pdficon.png" alt="[pdf]" title="pdf"/></a>',$first_entry->getLink('pdf','pdficon.png'));
+    $this->assertEquals('<a href="myarticle.pdf">[see]</a>',$first_entry->getLink('pdf',NULL,'see'));    
+  }
+
+  // see https://github.com/monperrus/bibtexbrowser/pull/14
+  function test_zotero() {
+    $test_data = fopen('php://memory','x+');
+    fwrite($test_data, "@book{aKey,file={myarticle.pdf}}\n"
+    );
+    fseek($test_data,0);
+    $btb = new BibDataBase();
+    $btb->update_internal("inline", $test_data);    
+    $first_entry=$btb->bibdb[array_keys($btb->bibdb)[0]];
+    $this->assertEquals('<a href="myarticle.pdf">[pdf]</a>',$first_entry->getUrlLink());    
+  }
+
+} // end class
+
+?>