1 files changed, 150 insertions, 0 deletions
diff --git a/modules/search/search.test b/modules/search/search.test
index fe2062dff..1a78c9eb4 100644
--- a/modules/search/search.test
+++ b/modules/search/search.test
@@ -872,3 +872,153 @@ class SearchConfigSettingsForm extends DrupalWebTestCase {
   }
 }
 
+/**
+ * Test the CJK tokenizer.
+ */
+class SearchTokenizerTestCase extends DrupalWebTestCase {
+  public static function getInfo() {
+    return array(
+      'name' => 'CJK tokenizer',
+      'description' => 'Check that CJK tokenizer works as intended.',
+      'group' => 'Search',
+    );
+  }
+
+  function setUp() {
+    parent::setUp('search');
+  }
+
+  /**
+   * Verifies that strings of CJK characters are tokenized.
+   *
+   * The search_simplify() function does special things with numbers, symbols,
+   * and punctuation. So we only test that CJK characters that are not in these
+   * character classes are tokenized properly. See PREG_CLASS_CKJ for more
+   * information.
+   */
+  function testTokenizer() {
+    // Set the minimum word size to 1 (to split all CJK characters) and make
+    // sure CJK tokenizing is turned on.
+    variable_set('minimum_word_size', 1);
+    variable_set('overlap_cjk', TRUE);
+    $this->refreshVariables();
+
+    // Create a string of CJK characters from various character ranges in
+    // the Unicode tables.
+
+    // Beginnings of the character ranges.
+    $starts = array(
+      'CJK unified' => 0x4e00,
+      'CJK Ext A' => 0x3400,
+      'CJK Compat' => 0xf900,
+      'Hangul Jamo' => 0x1100,
+      'Hangul Ext A' => 0xa960,
+      'Hangul Ext B' => 0xd7b0,
+      'Hangul Compat' => 0x3131,
+      'Half non-punct 1' => 0xff21,
+      'Half non-punct 2' => 0xff41,
+      'Half non-punct 3' => 0xff66,
+      'Hangul Syllables' => 0xac00,
+      'Hiragana' => 0x3040,
+      'Katakana' => 0x30a1,
+      'Katakana Ext' => 0x31f0,
+      'CJK Reserve 1' => 0x20000,
+      'CJK Reserve 2' => 0x30000,
+      'Bomofo' => 0x3100,
+      'Bomofo Ext' => 0x31a0,
+      'Lisu' => 0xa4d0,
+      'Yi' => 0xa000,
+    );
+
+    // Ends of the character ranges.
+    $ends = array(
+      'CJK unified' => 0x9fcf,
+      'CJK Ext A' => 0x4dbf,
+      'CJK Compat' => 0xfaff,
+      'Hangul Jamo' => 0x11ff,
+      'Hangul Ext A' => 0xa97f,
+      'Hangul Ext B' => 0xd7ff,
+      'Hangul Compat' => 0x318e,
+      'Half non-punct 1' => 0xff3a,
+      'Half non-punct 2' => 0xff5a,
+      'Half non-punct 3' => 0xffdc,
+      'Hangul Syllables' => 0xd7af,
+      'Hiragana' => 0x309f,
+      'Katakana' => 0x30ff,
+      'Katakana Ext' => 0x31ff,
+      'CJK Reserve 1' => 0x2fffd,
+      'CJK Reserve 2' => 0x3fffd,
+      'Bomofo' => 0x312f,
+      'Bomofo Ext' => 0x31b7,
+      'Lisu' => 0xa4fd,
+      'Yi' => 0xa48f,
+    );
+
+    // Generate characters consisting of starts, midpoints, and ends.
+    $chars = array();
+    $charcodes = array();
+    foreach ($starts as $key => $value) {
+      $charcodes[] = $starts[$key];
+      $chars[] = $this->code2utf($starts[$key]);
+      $mid = round(0.5 * ($starts[$key] + $ends[$key]));
+      $charcodes[] = $mid;
+      $chars[] = $this->code2utf($mid);
+      $charcodes[] = $ends[$key];
+      $chars[] = $this->code2utf($ends[$key]);
+    }
+
+    // Merge into a string and tokenize.
+    $string = implode('', $chars);
+    $out = trim(search_simplify($string));
+    $expected = drupal_strtolower(implode(' ', $chars));
+
+    // Verify that the output matches what we expect.
+    $this->assertEqual($out, $expected, 'CJK tokenizer worked on all supplied CJK characters');
+  }
+
+  /**
+   * Verifies that strings of non-CJK characters are not tokenized.
+   *
+   * This is just a sanity check - it verifies that strings of letters are
+   * not tokenized.
+   */
+  function testNoTokenizer() {
+    // Set the minimum word size to 1 (to split all CJK characters) and make
+    // sure CJK tokenizing is turned on.
+    variable_set('minimum_word_size', 1);
+    variable_set('overlap_cjk', TRUE);
+    $this->refreshVariables();
+
+    $letters = 'abcdefghijklmnopqrstuvwxyz';
+    $out = trim(search_simplify($letters));
+
+    $this->assertEqual($letters, $out, 'Letters are not CJK tokenized');
+  }
+
+  /**
+   * Like PHP chr() function, but for unicode characters.
+   *
+   * chr() only works for ASCII characters up to character 255. This function
+   * converts a number to the corresponding unicode character. Adapted from
+   * functions supplied in comments on several functions on php.net.
+   */
+  function code2utf($num) {
+    if ($num < 128) {
+      return chr($num);
+    }
+
+    if ($num < 2048) {
+      return chr(($num >> 6) + 192) . chr(($num & 63) + 128);
+    }
+
+    if ($num < 65536) {
+      return chr(($num >> 12) + 224) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
+    }
+
+    if ($num < 2097152) {
+      return chr(($num >> 18) + 240) . chr((($num >> 12) & 63) + 128) . chr((($num >> 6) & 63) + 128) . chr(($num & 63) + 128);
+    }
+
+    return '';
+  }
+}