Initial commit

flake/den/checkmate/tests/function_can_take.nix

@@ -0,0 +1,85 @@
+{
+  lib,
+  inputs,
+  config,
+  ...
+}:
+let
+  den.lib = inputs.target.lib { inherit inputs lib config; };
+  takes = den.lib.canTake;
+
+  flake.tests."test exactly fails" = {
+    expr = takes.exactly {
+      a = 1;
+      b = 2;
+    } ({ a }: a);
+    expected = false;
+  };
+
+  flake.tests."test exactly succeeds" = {
+    expr = takes.exactly { a = 1; } ({ a }: a);
+    expected = true;
+  };
+
+  flake.tests."test function with no named arguments can take anything" = {
+    expr = takes { } (x: x);
+    expected = true;
+  };
+
+  flake.tests."test function called with non attrs" = {
+    expr = takes 22 ({ host }: [ host ]);
+    expected = false;
+  };
+
+  flake.tests."test function missing required attr" = {
+    expr = takes { } ({ host }: [ host ]);
+    expected = false;
+  };
+
+  flake.tests."test function satisfied required attr" = {
+    expr = takes {
+      host = 1;
+    } ({ host, ... }: [ host ]);
+    expected = true;
+  };
+
+  flake.tests."test function missing second required attr" = {
+    expr =
+      takes
+        {
+          host = 1;
+        }
+        (
+          { host, user }:
+          [
+            host
+            user
+          ]
+        );
+    expected = false;
+  };
+
+  flake.tests."test function optional second attr" = {
+    expr =
+      takes
+        {
+          host = 1;
+          foo = 9;
+        }
+        (
+          {
+            host,
+            user ? 0,
+          }:
+          [
+            host
+            user
+          ]
+        );
+    expected = true;
+  };
+
+in
+{
+  inherit flake;
+}