feat(json2go): support manual input

plugin/gopher.lua

@@ -72,8 +72,9 @@ end)
 
 -- :GoJson
 cmd("GoJson", function(opts)
-  require("gopher.json2go").json2go(opts.fargs[1])
-end, "?")
+  local inp = ((opts.args ~= "" and opts.args) or nil)
+  require("gopher.json2go").json2go(inp)
+end, "*")
 
 -- :GoTest
 cmd("GoTestAdd", function()

spec/fixtures/json2go/manual_input.go

@@ -0,0 +1,2 @@
+package main
+

spec/fixtures/json2go/manual_output.go

@@ -0,0 +1,7 @@
+package main
+
+type AutoGenerated struct {
+	User struct {
+		Name string `json:"name"`
+	} `json:"user"`
+}

spec/integration/json2go_test.lua

@@ -14,6 +14,12 @@ json2go["should convert interativly"] = function()
 end
 
 json2go["should convert argument"] = function()
+  local rs = t.setup_test("json2go/manual", child, { 2, 0 })
+  child.cmd [[GoJson {"user": {"name": "user-ovic"}}]]
+  child.cmd "write"
+
+  t.eq(t.readfile(rs.tmp), rs.fixtures.output)
+  t.cleanup(rs)
 end
 
 return T