Add tests for variable module

Author: lambdalisue

vim/variable_test.ts

@@ -0,0 +1,35 @@
+import { Denops } from "../deps.ts";
+import { assertEquals } from "../deps_test.ts";
+import * as variable from "./variable.ts";
+
+Denops.test("getVar() return the value of the variable", async (denops) => {
+  await denops.cmd("let g:denops_std_vim_variable_test = 'hello'");
+  const result = await variable.getVar(
+    denops,
+    "g",
+    "denops_std_vim_variable_test",
+  );
+  assertEquals(result, "hello");
+});
+
+Denops.test("setVar() replace the value of the variable", async (denops) => {
+  await denops.cmd("let g:denops_std_vim_variable_test = 'hello'");
+  await variable.setVar(denops, "g", "denops_std_vim_variable_test", "world");
+  const result = await variable.getVar(
+    denops,
+    "g",
+    "denops_std_vim_variable_test",
+  );
+  assertEquals(result, "world");
+});
+
+Denops.test("removeVar() remove the variable", async (denops) => {
+  await denops.cmd("let g:denops_std_vim_variable_test = 'hello'");
+  await variable.removeVar(denops, "g", "denops_std_vim_variable_test");
+  const result = await variable.getVar(
+    denops,
+    "g",
+    "denops_std_vim_variable_test",
+  );
+  assertEquals(result, null);
+});