tests: remove deprecated handler usage

neovim/neovim@8260e48

test/spec/e2e_spec.lua

@@ -601,7 +601,7 @@ describe("e2e", function()
             tu.edit_test_file("test-file.txt")
         end)
         after_each(function()
-            require("null-ls.client").get_client().handlers[methods.lsp.CODE_ACTION] = nil
+            require("null-ls.client").get_client().handlers[methods.lsp.FORMATTING] = nil
         end)
 
         it("should use client handler", function()
@@ -612,29 +612,32 @@ describe("e2e", function()
         end)
     end)
 
-    describe("hover", function()
-        local mock_handler = require("luassert.stub").new()
+    -- https://github.com/neovim/neovim/commit/8260e4860b27a54a061bd8e2a9da23069993953a
+    -- hover no longer supports handler
+    if not vim.fn.has("nvim-0.11") == 1 then
+        describe("hover", function()
+            local mock_handler = require("luassert.stub").new()
 
-        before_each(function()
-            sources.register(builtins._test.mock_hover)
-            tu.edit_test_file("test-file.txt")
-            tu.wait()
+            before_each(function()
+                local client = require("null-ls.client").get_client()
+                client.handlers[methods.lsp.HOVER] = mock_handler
 
-            local client = require("null-ls.client").get_client()
-            client.handlers[methods.lsp.HOVER] = mock_handler
-        end)
-        after_each(function()
-            require("null-ls.client").get_client().handlers[methods.lsp.HOVER] = nil
-        end)
+                sources.register(builtins._test.mock_hover)
+                tu.edit_test_file("test-file.txt")
+            end)
+            after_each(function()
+                require("null-ls.client").get_client().handlers[methods.lsp.HOVER] = nil
+            end)
 
-        it("should call handler with results", function()
-            vim.lsp.buf.hover()
-            tu.wait()
+            it("should call handler with results", function()
+                lsp.buf.hover()
+                tu.wait()
 
-            assert.stub(mock_handler).was_called()
-            assert.same(mock_handler.calls[1].refs[2], { contents = { { "test" } } })
+                assert.stub(mock_handler).was_called()
+                assert.same(mock_handler.calls[1].refs[2], { contents = { { "test" } } })
+            end)
         end)
-    end)
+    end
 
     describe("client", function()
         it("should not leave pending requests on client object", function()