Apache Allura™

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import unittest

from allura.lib.diff import HtmlSideBySideDiff


class TestHtmlSideBySideDiff:

    # these tests are representative but not complete
    # there are a lot of different nuanced situations (e.g. trailing blanks etc)
    # and manually testing after changes is recommended too

    def test_make_table(self):
        a = 'line A1\nline 2\nline 3'.splitlines(keepends=True)
        b = 'line 1B\nline X\ntotalchg\n\tnew<script>&"'.splitlines(keepends=True)
        expected = '''\
<table class="side-by-side-diff">
  <thead>
    <th class="lineno"></th>
    <th>file a</th>
    <th class="lineno"></th>
    <th>file b</th>
  </thead>
<tr>
  <td class="lineno">1</td>
  <td class="diff-chg"><pre>line <span class="diff-rem">A</span>1</pre></td>
  <td class="lineno">1</td>
  <td class="diff-chg"><pre>line 1<span class="diff-add">B</span></pre></td>
</tr>
<tr>
  <td class="lineno">2</td>
  <td class="diff-chg"><pre>line <span class="diff-rem">2</span></pre></td>
  <td class="lineno">2</td>
  <td class="diff-chg"><pre>line <span class="diff-add">X</span></pre></td>
</tr>
<tr>
  <td class="lineno">3</td>
  <td class="diff-rem"><pre>line 3</pre></td>
  <td class="lineno">3</td>
  <td class="diff-add"><pre>totalchg</pre></td>
</tr>
<tr>
  <td class="lineno"></td>
  <td><pre></pre></td>
  <td class="lineno">4</td>
  <td class="diff-add"><pre>    new&lt;script&gt;&amp;&quot;</pre></td>
</tr>
</table>
'''.strip()
        html = HtmlSideBySideDiff().make_table(a, b, 'file a', 'file b').strip()
        assert html == expected

    def test_make_table_context_gap_start(self):
        a = 'line 1\nline 2\nline 3\nline 4\n line 5\nline 6\nline 7\nline 8'.splitlines(keepends=True)
        b = 'line 1\nline 2\nline 3\nline 4\n line 5\nline 6\nline X\nline 8'.splitlines(keepends=True)
        start = '''\
<table class="side-by-side-diff">
  <thead>
    <th class="lineno"></th>
    <th>file a</th>
    <th class="lineno"></th>
    <th>file b</th>
  </thead>
<tr>
  <td class="lineno"></td>
  <td class="diff-gap"><pre>...</pre></td>
  <td class="lineno"></td>
  <td class="diff-gap"><pre>...</pre></td>
</tr>
<tr>
  <td class="lineno">2</td>
  <td><pre>line 2</pre></td>
  <td class="lineno">2</td>
  <td><pre>line 2</pre></td>
</tr>
'''.strip()  # more lines follow in full output

        html = HtmlSideBySideDiff().make_table(a, b, 'file a', 'file b').strip()
        assert start in html

    def test_make_table_context_gap_middle(self):
        a = 'line 1\nline 2\nline 3\nline 4\n line 5\nline 6\nline 7\nline 8\nline 9\nline 10\nline 11\nline 12\nline 13'.splitlines(keepends=True)
        b = 'line X\nline 2\nline 3\nline 4\n line 5\nline 6\nline 7\nline 8\nline 9\nline 10\nline 11\nline 12\nline Y'.splitlines(keepends=True)
        middle = '''\
<tr>
  <td class="lineno">6</td>
  <td><pre>line 6</pre></td>
  <td class="lineno">6</td>
  <td><pre>line 6</pre></td>
</tr>
<tr>
  <td class="lineno"></td>
  <td class="diff-gap"><pre>...</pre></td>
  <td class="lineno"></td>
  <td class="diff-gap"><pre>...</pre></td>
</tr>
<tr>
  <td class="lineno">8</td>
  <td><pre>line 8</pre></td>
  <td class="lineno">8</td>
  <td><pre>line 8</pre></td>
</tr>
'''.strip()
        html = HtmlSideBySideDiff().make_table(a, b, 'file a', 'file b').strip()
        assert middle in html

    def test_unicode_make_table(self):
        a = ['строка']
        b = ['измененная строка']
        html = HtmlSideBySideDiff().make_table(a, b, 'file a', 'file b')
        assert 'строка' in html