tests/cmp: add a test that enables all sources

tests/fetch-tests.nix

@@ -54,6 +54,7 @@
             inherit pkgs lib helpers;
             config = {};
           };
+          cmp-sources = import ../plugins/completion/cmp/sources.nix;
         };
         inherit namespace;
       })

tests/test-sources/plugins/completion/cmp-all-sources.nix

@@ -0,0 +1,38 @@
+{
+  pkgs,
+  cmp-sources,
+  ...
+}: {
+  all-sources = {
+    plugins = {
+      copilot-lua = {
+        enable = true;
+
+        panel.enabled = false;
+        suggestion.enabled = false;
+      };
+
+      cmp = {
+        enable = true;
+        settings.sources = with pkgs.lib; let
+          disabledSources =
+            optional
+            (pkgs.stdenv.hostPlatform.system == "aarch64-linux")
+            "cmp_tabnine";
+
+          filterFunc = sourceName: !(elem sourceName disabledSources);
+
+          sourceNames =
+            filter
+            filterFunc
+            (attrNames cmp-sources);
+        in
+          map
+          (
+            sourceName: {name = sourceName;}
+          )
+          sourceNames;
+      };
+    };
+  };
+}