Fix tests

Author: ericdallo

test/lsp-dart-utils-test.el

@@ -73,7 +73,9 @@
 
 (ert-deftest lsp-dart-get-sdk-dir--flutter-project-test ()
   (lsp-dart-test-from-flutter-project
+   (mock (lsp-dart-flutter-project-p) => t)
    (mock (lsp-dart-get-flutter-sdk-dir) => "/flutter-sdk")
+   (mock (file-exists-p "/flutter-sdk/bin/cache/dart-sdk/") => t)
    (should (equal (lsp-dart-get-sdk-dir) "/flutter-sdk/bin/cache/dart-sdk/"))))
 
 (ert-deftest lsp-dart-get-sdk-dir--project-without-dart-on-path-test ()