Adding more unittests, based on feedback.

Tests/otlLib/builder_test.py

@@ -1448,8 +1448,33 @@ def test_buildStatTable_name_duplicates():
     builder.buildStatTable(font_obj, AXES, windowsNames=True, macNames=False)
     actual_names = [x.string for x in font_obj["name"].names]
 
+    # no new name records were added by buildStatTable
+    # because windows-only names with the same strings were already present
     assert expected_names == actual_names
 
+    font_obj["name"].removeNames(nameID=270)
+    expected_names = [x.string for x in font_obj["name"].names] + ['Weight']
+
+    builder.buildStatTable(font_obj, AXES, windowsNames=True, macNames=False)
+    actual_names = [x.string for x in font_obj["name"].names]
+    # One new name records 'Weight' were added by buildStatTable
+    assert expected_names == actual_names
+
+    builder.buildStatTable(font_obj, AXES, windowsNames=True, macNames=True)
+    actual_names = [x.string for x in font_obj["name"].names]
+    expected_names = ['Weight', 'Weight',
+                      'ExtraLight', 'ExtraLight',
+                      'Light', 'Light',
+                      'Regular', 'Regular',
+                      'Medium', 'Medium',
+                      'Bold', 'Bold',
+                      'ExtraBold', 'ExtraBold',
+                      'Black', 'Black']
+    # Multiple name records were added by buildStatTable
+    assert expected_names == actual_names
+
+
+
 
 def test_stat_infinities():
     negInf = floatToFixed(builder.AXIS_VALUE_NEGATIVE_INFINITY, 16)

Tests/ttLib/tables/_n_a_m_e_test.py

@@ -6,6 +6,7 @@ from fontTools.misc.xmlWriter import XMLWriter
 from io import BytesIO
 import struct
 import unittest
+from fontTools import ttLib
 from fontTools.ttLib import newTable
 from fontTools.ttLib.tables._n_a_m_e import (
 	table__n_a_m_e, NameRecord, nameRecordFormat, nameRecordSize, makeName, log)
@@ -305,6 +306,23 @@ class NameTableTest(unittest.TestCase):
 		self.assertGreaterEqual(nameID, 256)
 		self.assertEqual(nameID, table.findMultilingualName(names, minNameID=256))
 
+	def test_addMultilingualName_no_mac_but_win(self):
+		'''
+		Test if addMultilingualName adds
+		a Mac name table entry equal to Windows entry.
+		'''
+
+		font_obj = ttLib.TTFont()
+		font_obj["name"] = ttLib.newTable("name")
+		font_obj["name"].names = []
+
+		font_obj["name"].setName('Weight', 270, 3, 1, 0x409)
+		names = {'en': 'Weight', }
+		nameID = font_obj["name"].addMultilingualName(names, minNameID=256)
+
+		self.assertEqual(270, nameID)
+
+
 	def test_decompile_badOffset(self):
                 # https://github.com/fonttools/fonttools/issues/525
 		table = table__n_a_m_e()