add tests for server path script

Author: joaopluigi

tests/test_server_path.lua

@@ -0,0 +1,70 @@
+local MiniTest = require("mini.test")
+local eq = MiniTest.expect.equality
+local child = MiniTest.new_child_neovim()
+
+local function setup_test_environment()
+  Utils = require("eca.utils")
+  _G.cmd = function(custom_path)
+    return {
+      "nvim",
+      "--headless",
+      "--noplugin",
+      "--clean",
+      "--cmd",
+      [[lua package.preload["eca.path_finder"] = function()
+        local M = {}
+        function M.new()
+          return setmetatable({}, { __index = M })
+        end
+        function M:find(custom_path)
+          if custom_path == "error" then
+            error("custom-server-path-error")
+          end
+          return (custom_path ~= "" and custom_path) or "no-custom-server-path"
+        end
+        return M
+      end]],
+      "-u",
+      "scripts/server_path.lua",
+      "-c",
+      string.format("lua ServerPath.run(%s)", Utils.lua_quote(custom_path or "")),
+    }
+  end
+end
+
+local T = MiniTest.new_set({
+  hooks = {
+    pre_case = function()
+      child.restart({ "-u", "scripts/minimal_init.lua" })
+      child.lua_func(setup_test_environment)
+    end,
+    post_case = function()
+    end,
+    post_once = child.stop,
+  },
+})
+
+T["server_path"] = MiniTest.new_set()
+
+T["server_path"]["run without custom path should print to stdout"] = function()
+  child.lua("_G.result = vim.system(_G.cmd(), { text = true }):wait()")
+  eq(child.lua_get("_G.result.code"), 0)
+  eq(child.lua_get("_G.result.stdout"), "no-custom-server-path")
+  eq(child.lua_get("_G.result.stderr"), "")
+end
+
+T["server_path"]["run with custom path should print to stdout"] = function()
+  child.lua("_G.result = vim.system(_G.cmd('custom-server-path'), { text = true }):wait()")
+  eq(child.lua_get("_G.result.code"), 0)
+  eq(child.lua_get("_G.result.stdout"), "custom-server-path")
+  eq(child.lua_get("_G.result.stderr"), "")
+end
+
+T["server_path"]["run with error should print to stderr"] = function()
+  child.lua("_G.result = vim.system(_G.cmd('error'), { text = true }):wait()")
+  eq(child.lua_get("_G.result.code"), 1)
+  eq(child.lua_get("_G.result.stdout"), "")
+  eq(string.find(child.lua_get("_G.result.stderr"), "custom-server-path-error", 1 , true) ~= nil, true)
+end
+
+return T