From 94a70f1b9f0407dfe335f70dbfd3a73bbb26afc0 Mon Sep 17 00:00:00 2001
From: Roozbeh Pournader <roozbeh@google.com>
Date: Wed, 7 Jan 2015 00:21:02 -0800
Subject: Move the exhaustive tests to a different make targe.

Plus some cleanup in imports.
---
 scripts/run_exhaustive_tests.py | 77 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100644 scripts/run_exhaustive_tests.py

(limited to 'scripts/run_exhaustive_tests.py')

diff --git a/scripts/run_exhaustive_tests.py b/scripts/run_exhaustive_tests.py
new file mode 100644
index 0000000..cdc770b
--- /dev/null
+++ b/scripts/run_exhaustive_tests.py
@@ -0,0 +1,77 @@
+#!/usr/bin/python
+"""Test general health of the fonts."""
+
+import glob
+import json
+import unittest
+
+from fontTools import ttLib
+from nototools import coverage
+from nototools import render
+from nototools import unicode_data
+
+
+def load_fonts():
+    """Load all major fonts."""
+    all_font_files = (glob.glob('out/RobotoTTF/*.ttf')
+                      + glob.glob('out/RobotoCondensedTTF/*.ttf'))
+    all_fonts = [ttLib.TTFont(font) for font in all_font_files]
+    assert len(all_font_files) == 18
+    return all_font_files, all_fonts
+
+
+class TestSpacingMarks(unittest.TestCase):
+    """Tests that spacing marks are indeed spacing."""
+
+    def setUp(self):
+        self.font_files, _ = load_fonts()
+        charset = coverage.character_set(self.font_files[0])
+        self.marks_to_test = [char for char in charset
+                              if unicode_data.category(char) in ['Lm', 'Sk']]
+        self.advance_cache = {}
+
+    def get_advances(self, text, font):
+        """Get a list of horizontal advances for text rendered in a font."""
+        try:
+            return self.advance_cache[(text, font)]
+        except KeyError:
+            hb_output = render.run_harfbuzz_on_text(text, font, '')
+            hb_output = json.loads(hb_output)
+            advances = [glyph['ax'] for glyph in hb_output]
+            self.advance_cache[(text, font)] = advances
+            return advances
+
+    def test_individual_spacing_marks(self):
+        """Tests that spacing marks are spacing by themselves."""
+        for font in self.font_files:
+            print 'Testing %s for stand-alone spacing marks...' % font
+            for mark in self.marks_to_test:
+                mark = unichr(mark)
+                advances = self.get_advances(mark, font)
+                assert len(advances) == 1
+                self.assertNotEqual(advances[0], 0)
+
+    def test_spacing_marks_in_combination(self):
+        """Tests that spacing marks do not combine with base letters."""
+        for font in self.font_files:
+            print 'Testing %s for spacing marks in combination...' % font
+            for base_letter in (u'A\u00C6BCDEFGHIJKLMNO\u00D8\u01A0PRST'
+                                u'U\u01AFVWXYZ'
+                                u'a\u00E6bcdefghi\u0131j\u0237klmn'
+                                u'o\u00F8\u01A1prs\u017Ftu\u01B0vwxyz'
+                                u'\u03D2'):
+                print 'Testing %s combinations' % base_letter
+                for mark in self.marks_to_test:
+                    if mark == 0x02DE:
+                        # Skip rhotic hook, as it's perhaps OK for it to form
+                        # ligatures
+                        continue
+                    mark = unichr(mark)
+                    advances = self.get_advances(base_letter + mark, font)
+                    self.assertEqual(len(advances), 2,
+                        'The sequence <%04X, %04X> combines, '
+                        'but it should not' % (ord(base_letter), ord(mark)))
+
+
+if __name__ == '__main__':
+    unittest.main()
-- 
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