Add test for title_case().

tests/test_utilities.py

@@ -4,8 +4,8 @@
     Color, Info, columns, conjoin, did_you_mean, comment, cull, display, done,
     error, Error, fatal, fmt, full_stop, indent, Inform, is_collection,
     is_iterable, is_mapping, is_str, join, get_prog_name, get_informer, narrate,
-    os_error, output, plural, render, terminate, warn, ddd, ppp, sss, vvv,
-    ProgressBar, parse_range, format_range
+    os_error, output, plural, render, terminate, title_case, warn, ddd, ppp,
+    sss, vvv, ProgressBar, parse_range, format_range
 )
 from textwrap import dedent
 import sys
@@ -185,6 +185,26 @@ def test_did_you_mean():
     assert did_you_mean('abc', ['bcd', 'cde']) == 'bcd'
     assert did_you_mean('abc', ['cde', 'bcd']) == 'bcd'
 
+def test_title_case():
+    cases = [(
+        'CDC warns about "aggressive" rats as coronavirus shuts down restaurants',
+        'CDC Warns About "Aggressive" Rats as Coronavirus Shuts Down Restaurants'
+    ), (
+        'L.A. County opens churches, stores, pools, drive-in theaters',
+        'L.A. County Opens Churches, Stores, Pools, Drive-in Theaters'
+    ), (
+        'UConn senior accused of killing two men was looking for young woman',
+        'UConn Senior Accused of Killing Two Men Was Looking for Young Woman'
+    ), (
+        'Giant asteroid that killed the dinosaurs slammed into Earth at ‘deadliest possible angle,’ study reveals',
+        'Giant Asteroid That Killed the Dinosaurs Slammed Into Earth at ‘Deadliest Possible Angle,’ Study Reveals'
+    ), (
+        'Maintain given spacing: This is a test.  This is only a test.',
+        'Maintain Given Spacing: This Is a Test.  This Is Only a Test.'
+    )]
+    for test, expected in cases:
+        assert title_case(test) == expected
+
 @pytest.mark.parametrize(
     'given, expected', [
             ('',        set()),