Add the beginning of a test infrastructure.

We now test for expected values of yMin and yMax, and equal widths for
digits.

1 files changed, 49 insertions, 0 deletions

diff --git a/scripts/run_android_tests.py b/scripts/run_android_tests.py
new file mode 100644
index 0000000..7880039
--- /dev/null
+++ b/scripts/run_android_tests.py
@@ -0,0 +1,49 @@
+#!/usr/bin/python
+"""Test assumptions that Android relies on."""
+
+import glob
+import unittest
+
+from fontTools import ttLib
+
+
+def load_fonts():
+    """Load all fonts built for Android."""
+    all_fonts = glob.glob('out/android/*.ttf')
+    all_fonts = [ttLib.TTFont(font) for font in all_fonts]
+    return all_fonts
+
+
+class TestVerticalMetrics(unittest.TestCase):
+    """Test the vertical metrics of fonts."""
+
+    def setUp(self):
+        self.fonts = load_fonts()
+
+    def test_ymin_ymax(self):
+        """Tests yMin and yMax to be equal to what Android expects."""
+        for font in self.fonts:
+            head_table = font['head']
+            self.assertEqual(head_table.yMin, -555)
+            self.assertEqual(head_table.yMax, 2163)
+
+
+class TestDigitWidths(unittest.TestCase):
+    """Tests the width of digits."""
+
+    def setUp(self):
+        self.fonts = load_fonts()
+        self.digits = [
+            'zero', 'one', 'two', 'three', 'four',
+            'five', 'six', 'seven', 'eight', 'nine']
+
+    def test_digit_widths(self):
+        """Tests all decimal digits to make sure they have the same width."""
+        for font in self.fonts:
+            hmtx_table = font['hmtx']
+            widths = [hmtx_table[digit][0] for digit in self.digits]
+            self.assertEqual(len(set(widths)), 1)
+
+
+if __name__ == '__main__':
+    unittest.main()