Run all tests on the full frozen build using the frozen launcher

Much more comprehensive test coverage at the cost of slightly increasing
the frozen build size.

kitty_tests/check_build.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+# vim:fileencoding=utf-8
+# License: GPLv3 Copyright: 2021, Kovid Goyal <kovid at kovidgoyal.net>
+
+
+import os
+import unittest
+
+
+class TestBuild(unittest.TestCase):
+
+    def test_exe(self) -> None:
+        from kitty.constants import kitty_exe
+        exe = kitty_exe()
+        self.assertTrue(os.access(exe, os.X_OK))
+        self.assertTrue(os.path.isfile(exe))
+        self.assertIn('kitty', os.path.basename(exe))
+
+    def test_loading_extensions(self) -> None:
+        import kitty.fast_data_types as fdt
+        from kittens.unicode_input import unicode_names
+        from kittens.choose import subseq_matcher
+        from kittens.diff import diff_speedup
+        del fdt, unicode_names, subseq_matcher, diff_speedup
+
+    def test_loading_shaders(self) -> None:
+        from kitty.utils import load_shaders
+        for name in 'cell border bgimage tint blit graphics'.split():
+            load_shaders(name)
+
+    def test_glfw_modules(self) -> None:
+        from kitty.constants import is_macos, glfw_path
+        modules = ('cocoa',) if is_macos else ('x11', 'wayland')
+        for name in modules:
+            path = glfw_path(name)
+            self.assertTrue(os.path.isfile(path))
+            self.assertTrue(os.access(path, os.X_OK))
+
+    def test_all_kitten_names(self) -> None:
+        from kittens.runner import all_kitten_names
+        names = all_kitten_names()
+        self.assertIn('diff', names)
+        self.assertIn('hints', names)
+        self.assertGreater(len(names), 8)
+
+    def test_filesystem_locations(self) -> None:
+        from kitty.constants import terminfo_dir, logo_png_file
+        self.assertTrue(os.path.isdir(terminfo_dir), f'Terminfo dir: {terminfo_dir}')
+        self.assertTrue(os.path.exists(logo_png_file), f'Logo file: {logo_png_file}')
+
+
+def main() -> None:
+    tests = unittest.defaultTestLoader.loadTestsFromTestCase(TestBuild)
+    r = unittest.TextTestRunner(verbosity=4)
+    result = r.run(tests)
+    if result.errors or result.failures:
+        raise SystemExit(1)