theme: Add missing styles to REQUIRED_STYLES and check completeness.

* 3 missing styles: 'muted', 'current_user', 'table_head' were added
to REQUIRED_STYLES.
* `complete_and_incomplete_themes` was amended to check for equality
instead of the superset criteria
* The completeness test for builtin themes was added to check for
equality with REQUIRED_STYLES and existance of Colors.
* The FIXME in `generate_themes` that bypassed undefined styles in
REQUIRED_STYLES removed.

tests/config/test_themes.py

@@ -23,6 +23,28 @@ def test_all_themes():
     assert all_themes() == list(THEMES.keys())
 
 
+# Check built-in themes are complete for quality-control purposes
+@pytest.mark.parametrize(
+    "theme_name",
+    [
+        theme
+        if theme in expected_complete_themes
+        else pytest.param(theme, marks=pytest.mark.xfail(reason="incomplete"))
+        for theme in THEMES
+    ],
+)
+def test_builtin_theme_completeness(theme_name):
+    theme = THEMES[theme_name]
+    theme_styles = theme.STYLES
+    theme_colors = theme.Color
+
+    assert len(theme_styles) == len(REQUIRED_STYLES)
+    assert all(required_style in theme_styles for required_style in REQUIRED_STYLES)
+    for style_name, style_conf in theme_styles.items():
+        fg, bg = style_conf
+        assert fg in theme_colors and bg in theme_colors
+
+
 def test_complete_and_incomplete_themes():
     # These are sorted to ensure reproducibility
     result = (

zulipterminal/config/themes.py

@@ -36,7 +36,7 @@ def complete_and_incomplete_themes() -> Tuple[List[str], List[str]]:
     complete = {
         name
         for name, theme in THEMES.items()
-        if {s for s in theme.STYLES}.issuperset(REQUIRED_STYLES)
+        if theme.STYLES.keys() == REQUIRED_STYLES.keys()
     }
     incomplete = list(set(THEMES) - complete)
     return sorted(list(complete)), sorted(incomplete)
@@ -52,11 +52,7 @@ def generate_theme(theme_name: str, color_depth: int) -> ThemeSpec:
         bg_codes = bg.value.split()
         new_style: Tuple[Optional[str], ...] = tuple()
         if color_depth == 1:
-            # FIXME: Check for completeness of REQUIRED_STYLES
-            try:
-                new_style = (style_name, "", "", REQUIRED_STYLES[style_name])
-            except KeyError:
-                continue
+            new_style = (style_name, "", "", REQUIRED_STYLES[style_name])
         elif color_depth == 16:
             fg = " ".join([fg_codes[0]] + fg_codes[3:]).replace("_", " ")
             bg = " ".join([bg_codes[0]] + bg_codes[3:]).replace("_", " ")

zulipterminal/themes/_template.py

@@ -104,11 +104,14 @@ class Color(Enum):
     'popup_category'  : 'bold',
     'unread_count'    : 'bold',
     'starred_count'   : '',
+    'table_head'      : 'bold',
     'filter_results'  : 'bold',
     'edit_topic'      : 'standout',
     'edit_tag'        : 'standout',
     'edit_author'     : 'bold',
     'edit_time'       : 'bold',
+    'current_user'    : '',
+    'muted'           : 'bold',
     'popup_border'    : 'bold',
     'area:help'       : 'standout',
     'area:msg'        : 'standout',