theme: Delete old themes.

Old theme format used in themes.py is deleted from this commit.
* Migrated to new themes in `run.py`
* Mono theme generation is no longer required hence it is removed
from both themes.py and run.py
* NEW_THEMES is now the new THEMES dict.
* `complete_and_incomplete_themes` is edited to make it use the
new THEMES instead of the old one.

A new `builtin_theme_completeness` test is added.

Tests amended.

tests/cli/test_run.py

@@ -5,7 +5,6 @@
 import pytest
 
 from zulipterminal.cli.run import (
-    THEMES,
     _write_zuliprc,
     exit_with_error,
     get_login_id,
@@ -140,7 +139,6 @@ def test_valid_zuliprc_but_no_connection(
 def test_warning_regarding_incomplete_theme(
     capsys,
     mocker,
-    monkeypatch,
     minimal_zuliprc,
     bad_theme,
     server_connection_error="sce",
@@ -149,13 +147,12 @@ def test_warning_regarding_incomplete_theme(
         "zulipterminal.core.Controller.__init__",
         side_effect=ServerConnectionFailure(server_connection_error),
     )
-
-    monkeypatch.setitem(THEMES, bad_theme, [])
     mocker.patch("zulipterminal.cli.run.all_themes", return_value=("a", "b", "c", "d"))
     mocker.patch(
         "zulipterminal.cli.run.complete_and_incomplete_themes",
         return_value=(["a", "b"], ["c", "d"]),
     )
+    mocker.patch("zulipterminal.cli.run.generate_theme")
 
     with pytest.raises(SystemExit) as e:
         main(["-c", minimal_zuliprc, "-t", bad_theme])

tests/config/test_themes.py

@@ -16,7 +16,6 @@
     "gruvbox_dark",
     "zt_light",
     "zt_blue",
-    "gruvbox_dark24",
 }
 
 
@@ -36,41 +35,14 @@ def test_all_themes():
 )
 def test_builtin_theme_completeness(theme_name):
     theme = THEMES[theme_name]
-    styles_in_theme = {style[0] for style in theme}
+    theme_styles = theme.STYLES
+    theme_colors = theme.Color
 
-    assert len(styles_in_theme) == len(REQUIRED_STYLES)
-    assert all(required_style in styles_in_theme for required_style in REQUIRED_STYLES)
-
-
-@pytest.mark.parametrize(
-    "theme_name, depth",
-    [
-        ("zt_dark", 16),
-        ("zt_dark", 256),
-        ("zt_light", 16),
-        ("zt_blue", 16),
-        ("gruvbox_dark", 16),
-        ("gruvbox_dark", 256),
-        ("gruvbox_dark24", 2 ** 24),
-        ("gruvbox_dark24", 2 ** 24),
-    ],
-)
-def test_migrated_themes(theme_name, depth):
-    def split_and_strip(style):
-        style = style.split(",")
-        style = [s.strip() for s in style]
-        return style
-
-    old_theme = THEMES[theme_name]
-    new_theme = generate_theme(theme_name.replace("24", ""), depth)
-    for new_style, old_style in zip(new_theme, old_theme):
-        assert new_style[0] == old_style[0]
-        if depth == 16:
-            assert split_and_strip(new_style[1]) == split_and_strip(old_style[1])
-            assert split_and_strip(new_style[2]) == split_and_strip(old_style[2])
-        else:
-            assert split_and_strip(new_style[4]) == split_and_strip(old_style[4])
-            assert split_and_strip(new_style[5]) == split_and_strip(old_style[5])
+    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():
@@ -128,7 +100,7 @@ class Color(Enum):
     ],
 )
 def test_generate_theme(mocker, color_depth, expected_urwid_theme):
-    mocker.patch.dict("zulipterminal.config.themes.NEW_THEMES", {"theme": theme})
+    mocker.patch.dict("zulipterminal.config.themes.THEMES", {"theme": theme})
     req_styles = {"s1": "", "s2": "bold"}
     mocker.patch.dict("zulipterminal.themes._template.REQUIRED_STYLES", req_styles)
     assert generate_theme("theme", color_depth) == expected_urwid_theme

zulipterminal/cli/run.py

@@ -12,11 +12,10 @@
 from urwid import display_common, set_encoding
 
 from zulipterminal.config.themes import (
-    THEMES,
     aliased_themes,
     all_themes,
     complete_and_incomplete_themes,
-    theme_with_monochrome_added,
+    generate_theme,
 )
 from zulipterminal.core import Controller
 from zulipterminal.model import ServerConnectionFailure
@@ -486,10 +485,7 @@ def main(options: Optional[List[str]] = None) -> None:
                 break
             boolean_settings[setting] = zterm[setting][0] == valid_values[0]
 
-        if color_depth == 1:
-            theme_data = theme_with_monochrome_added(THEMES[theme_to_use[0]])
-        else:
-            theme_data = THEMES[theme_to_use[0]]
+        theme_data = generate_theme(theme_to_use[0], color_depth)
 
         Controller(
             zuliprc_path,