Fix broken evaluation in cljc files with one connection

Author: vspinu

CHANGELOG.md

@@ -8,6 +8,7 @@
 
 ### Bugs Fixed
 
+* Fix interactive evaluation in cljc buffers with only one connection.
 * [#2058](https://github.com/clojure-emacs/cider/pull/2058) Don't cache ns-forms in buffers with no such forms.
 * [#2057](https://github.com/clojure-emacs/cider/pull/2057) Use `cider--font-lock-ensure` for compatibility with Emacs 24.5.
 

cider-client.el

@@ -268,6 +268,7 @@ at all."
   ;; that TYPE, but ultimately allow any type.
   (cl-labels ((right-type-p (c type)
                             (when (or (not type)
+                                      (equal type "multi")
                                       (and (buffer-live-p c)
                                            (equal (cider--connection-type c) type)))
                               c))

test/cider-client-tests.el

@@ -498,3 +498,20 @@ SYMBOL is locally let-bound to the current buffer."
     (spy-on 'cider-connected-p :and-return-value nil)
     (spy-on 'clojure-expected-ns :and-return-value "clojure-expected-ns")
     (expect (cider-expected-ns "foo") :to-equal "clojure-expected-ns")))
+
+(describe "cider-load-file"
+  (it "works as expected in empty Clojure buffers"
+    (spy-on 'cider-request:load-file :and-return-value nil)
+    (with-connection-buffer "clj" b
+     (with-temp-buffer
+       (clojure-mode)
+       (setq buffer-file-name (make-temp-name "tmp.clj"))
+       (expect (lambda () (cider-load-buffer)) :not :to-throw)))))
+
+(describe "cider-interactive-eval"
+  (it "works as expected in empty Clojure buffers"
+    (spy-on 'cider-nrepl-request:eval :and-return-value nil)
+    (with-connection-buffer "clj" b
+      (with-temp-buffer
+        (clojure-mode)
+        (expect (lambda () (cider-interactive-eval "(+ 1)")) :not :to-throw)))))