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/*
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 * single-file-engine-resolution.test.ts
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 *
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 * Tests that singleFileProjectContext resolves engine extensions
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 * even without renderOptions (the preview code path).
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 * Related to issue #13983
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 *
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 * Copyright (C) 2026 Posit Software, PBC
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 */
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import { unitTest } from "../../test.ts";
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import { assert } from "testing/asserts";
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import { join } from "../../../src/deno_ral/path.ts";
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import { singleFileProjectContext } from "../../../src/project/types/single-file/single-file.ts";
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import { notebookContext } from "../../../src/render/notebook/notebook-context.ts";
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import { initYamlIntelligenceResourcesFromFilesystem } from "../../../src/core/schema/utils.ts";
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unitTest(
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  "singleFileProjectContext resolves engine extensions without renderOptions",
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  async () => {
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    await initYamlIntelligenceResourcesFromFilesystem();
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    const tmpDir = Deno.makeTempDirSync({ prefix: "quarto-test" });
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    const file = join(tmpDir, "test.qmd");
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    Deno.writeTextFileSync(
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      file,
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      "---\ntitle: test\nengine: julia\n---\n",
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    );
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    try {
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      const nbContext = notebookContext();
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      const project = await singleFileProjectContext(file, nbContext);
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      assert(
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        project.config !== undefined,
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        "config should be initialized even without renderOptions",
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      );
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      assert(
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        Array.isArray(project.config?.engines) &&
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          project.config.engines.length > 0,
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        "engine extensions should be resolved (bundled engines discovered)",
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      );
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    } finally {
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      Deno.removeSync(tmpDir, { recursive: true });
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    }
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  },
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);
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