tests: Add unit test for DirectEntry._autoCapitalize()

Closes #628

Co-authored-by: rdb <git@rdb.name>

tests/gui/test_DirectEntry.py

@@ -0,0 +1,38 @@
+# coding=utf-8
+from direct.gui.DirectEntry import DirectEntry
+import sys
+
+
+def test_entry_get():
+    entry = DirectEntry()
+    assert isinstance(entry.get(), str)
+
+
+def test_entry_auto_capitalize():
+    # Now we can generate the DirectEntry component itself. In normal use, we
+    # would pass "autoCapitalize=1" to DirectEntry's constructor in order for
+    # DirectEntry._autoCapitalize() to be called upon typing into the entry
+    # GUI, however in the case of this unit test where there is no GUI to type
+    # into, we don't need to bother doing that; we're just calling the function
+    # ourselves anyway.
+    entry = DirectEntry()
+
+    # Test DirectEntry._autoCapitalize(). The intended behavior would be that
+    # the first letter of each word in the entry would be capitalized, so that
+    # is what we will check for:
+    entry.set('auto capitalize test')
+    entry._autoCapitalize()
+    assert entry.get() == 'Auto Capitalize Test'
+
+    # Test DirectEntry._autoCapitalize() with a unicode object this time.
+    entry.set(u'àütò çapítalízè ţèsţ')
+    assert entry.get() == u'àütò çapítalízè ţèsţ'
+    entry._autoCapitalize()
+    assert entry.get() == u'Àütò Çapítalízè Ţèsţ'
+
+    # Also test it with a UTF-8 encoded byte string in Python 2.
+    if sys.version_info < (3, 0):
+        entry.set(u'àütò çapítalízè ţèsţ'.encode('utf-8'))
+        assert entry.get() == u'àütò çapítalízè ţèsţ'
+        entry._autoCapitalize()
+        assert entry.get() == u'Àütò Çapítalízè Ţèsţ'