Add a unit test to quartoConfig loading

Author: cderv

src/core/quarto.ts

@@ -43,8 +43,8 @@ export const quartoConfig = {
       return kLocalDevelopment;
     }
   },
-  dotenv: async (): Promise<Record<string, string>> => {
-    if (!dotenvConfig) {
+  dotenv: async (forceReload?: boolean): Promise<Record<string, string>> => {
+    if (forceReload || !dotenvConfig) {
       const options: ConfigOptions = {
         defaultsPath: join(quartoConfig.sharePath(), "env", "env.defaults"),
         // On dev mode only (QUARTO_DEBUG='true'), we load the .env file in root quarto-cli project

tests/unit/dotenv-config.test.ts

@@ -0,0 +1,42 @@
+/*
+* environment.test.ts
+*
+* Copyright (C) 2020-2022 Posit Software, PBC
+*
+*/
+import { assert, assertEquals } from "testing/asserts.ts";
+import { unitTest } from "../test.ts";
+import { quartoConfig } from "../../src/core/quarto.ts";
+
+const workingDir = Deno.makeTempDirSync();
+
+unitTest(
+  "dotenv config",
+  async () => {
+    // force reload for the test as otherwise the cached value 
+    // loaded from tests/ working dir will be used
+    const dotenvConfig = await quartoConfig.dotenv(true);
+    assert(
+      Object.keys(dotenvConfig).length > 0,
+      "Quarto dotenv config is not loading correctly",
+    );
+  },
+  {
+    setup: () => {
+      // testing working dir config wrongly loaded 
+      // https://github.com/quarto-dev/quarto-cli/issues/9262
+      Deno.writeTextFileSync(".env.example", "TEST_VAR=")
+      return Promise.resolve();
+    },
+    cwd: () => {
+      return workingDir;
+    },
+    teardown: () => {
+      try {
+        Deno.removeSync(workingDir, { recursive: true });
+      } catch {
+      }
+      return Promise.resolve();
+    },
+  }
+);