Add keyBind tests.

tests/lazyUtils.nix

@@ -12,6 +12,12 @@ let
     builder = "test";
     system = "test";
   };
+  minBind = {
+    bind = "<leader>";
+    cmd = null;
+    cmdIsFunction = false;
+    opts = null;
+  };
 in
 {
   helpers = {
@@ -41,7 +47,66 @@ in
         };
       };
     };
-    getKey = { };
+    getKey = {
+      testBind = {
+        expr = lazyUtils.helpers.getKey minBind;
+        expected = [
+          minBind.bind
+        ];
+      };
+      testCmd = {
+        expr = lazyUtils.helpers.getKey (minBind // { cmd = "testCmd"; });
+        expected = [
+          minBind.bind
+          "testCmd"
+        ];
+      };
+      testFnNoCmd = {
+        expr = lazyUtils.helpers.getKey (minBind // { cmdIsFunction = true; });
+        expected = [
+          minBind.bind
+        ];
+      };
+      testFn = {
+        expr =
+          let
+            result = lazyUtils.helpers.getKey (
+              minBind
+              // {
+                cmd = "testCmd";
+                cmdIsFunction = true;
+              }
+            );
+          in
+          assert builtins.isFunction (builtins.elemAt result 1);
+          map (val: if builtins.isFunction val then val null else val) result;
+        expected = [
+          minBind.bind
+          "testCmd"
+        ];
+      };
+      testOpts = {
+        expr = lazyUtils.helpers.getKey (
+          minBind
+          // {
+            opts = {
+              description = "A test keybind.";
+            };
+          }
+        );
+        expected = [
+          minBind.bind
+          {
+            __unpack = true;
+            description = "A test keybind.";
+          }
+        ];
+      };
+      testInvalid = {
+        expr = lazyUtils.helpers.getKey (minBind // { cmdIsFunction = null; });
+        expectedError.type = "AssertionError";
+      };
+    };
     pluginWrapper = {
       testShort = {
         expr = lazyUtils.helpers.pluginWrapper "test";