[Suggestion] Add test scaffolding

eslint.config.mjs

@@ -4,7 +4,7 @@ import unjs from "eslint-config-unjs";
 export default unjs({
   ignores: [
     ".git",
-    "test/fixture/dist"
+    "test/fixtures/**/dist"
   ],
   rules: {
     "unicorn/no-null": 0,

test/__snapshots__/build.test.ts.snap

@@ -0,0 +1,102 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`Build fixtures > declaration (mkdist) > a.d.ts 1`] = `
+"export declare function foo(): number;
+"
+`;
+
+exports[`Build fixtures > declaration (mkdist) > a.mjs 1`] = `
+"export function foo() {
+  return 42;
+}
+"
+`;
+
+exports[`Build fixtures > declaration (mkdist) > index.d.ts 1`] = `
+"export { foo } from "./a.js";
+"
+`;
+
+exports[`Build fixtures > declaration (mkdist) > index.mjs 1`] = `
+"export { foo } from "./a.js";
+"
+`;
+
+exports[`Build fixtures > declaration (rollup) > index.cjs 1`] = `
+"'use strict';
+
+function foo() {
+  return 42;
+}
+
+exports.foo = foo;
+"
+`;
+
+exports[`Build fixtures > declaration (rollup) > index.d.cts 1`] = `
+"declare function foo(): number;
+
+export { foo };
+"
+`;
+
+exports[`Build fixtures > declaration (rollup) > index.d.mts 1`] = `
+"declare function foo(): number;
+
+export { foo };
+"
+`;
+
+exports[`Build fixtures > declaration (rollup) > index.d.ts 1`] = `
+"declare function foo(): number;
+
+export { foo };
+"
+`;
+
+exports[`Build fixtures > declaration (rollup) > index.mjs 1`] = `
+"function foo() {
+  return 42;
+}
+
+export { foo };
+"
+`;
+
+exports[`Build fixtures > sourcemap (mkdist) > a.mjs 1`] = `
+"export function foo() {
+  return 42;
+}
+"
+`;
+
+exports[`Build fixtures > sourcemap (mkdist) > index.mjs 1`] = `
+"export { foo } from "./a.js";
+"
+`;
+
+exports[`Build fixtures > sourcemap (rollup) > index.cjs 1`] = `
+"'use strict';
+
+function foo() {
+  return 42;
+}
+
+exports.foo = foo;
+//# sourceMappingURL=index.cjs.map
+"
+`;
+
+exports[`Build fixtures > sourcemap (rollup) > index.cjs.map 1`] = `"{"version":3,"file":"index.cjs","sources":["../src/a.ts"],"sourcesContent":["export function foo(): number {\\n  return 42;\\n}\\n"],"names":[],"mappings":";;AAAO,SAAS,GAAc,GAAA;AAC5B,EAAO,OAAA,EAAA;AACT;;;;"}"`;
+
+exports[`Build fixtures > sourcemap (rollup) > index.mjs 1`] = `
+"function foo() {
+  return 42;
+}
+
+export { foo };
+//# sourceMappingURL=index.mjs.map
+"
+`;
+
+exports[`Build fixtures > sourcemap (rollup) > index.mjs.map 1`] = `"{"version":3,"file":"index.mjs","sources":["../src/a.ts"],"sourcesContent":["export function foo(): number {\\n  return 42;\\n}\\n"],"names":[],"mappings":"AAAO,SAAS,GAAc,GAAA;AAC5B,EAAO,OAAA,EAAA;AACT;;;;"}"`;

test/build.test.ts

@@ -0,0 +1,51 @@
+import { describe, it, expect } from "vitest";
+import fs from "node:fs";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { build } from "../src/index.js";
+
+type BuildConfig = Parameters<typeof build>[2];
+
+describe("Build fixtures", () => {
+  const tests: [string, BuildConfig & { dir: string }][] = [
+    [
+      "declaration (mkdist)",
+      {
+        dir: "fixtures/mkdist-declaration",
+      },
+    ],
+    [
+      "sourcemap (mkdist)",
+      {
+        dir: "fixtures/mkdist-sourcemap",
+      },
+    ],
+    [
+      "declaration (rollup)",
+      {
+        dir: "fixtures/rollup-declaration",
+      },
+    ],
+    [
+      "sourcemap (rollup)",
+      {
+        dir: "fixtures/rollup-sourcemap",
+      },
+    ],
+  ];
+
+  it.each(tests)("%s", async (_, { dir, ...buildOptions }) => {
+    const cwd = new URL(dir.replace(/\/?$/, "/"), import.meta.url);
+    await build(fileURLToPath(cwd), false, buildOptions);
+    for (const file of fs.readdirSync(new URL("dist/", cwd), {
+      recursive: true,
+      withFileTypes: true,
+    })) {
+      if (file.isFile()) {
+        expect(
+          fs.readFileSync(path.join(file.parentPath, file.name), "utf8"),
+        ).toMatchSnapshot(file.name);
+      }
+    }
+  });
+});

test/fixture/build.config.ts → test/fixtures/default/build.config.ts

@@ -1,4 +1,4 @@
-import { defineBuildConfig } from "../../src";
+import { defineBuildConfig } from "../../../src";
 
 export default defineBuildConfig([
   // Auto preset

test/fixture/build.preset.ts → test/fixtures/default/build.preset.ts

@@ -1,4 +1,4 @@
-import { definePreset } from "../../src";
+import { definePreset } from "../../../src";
 
 export default definePreset({
   declaration: "compatible",

test/fixtures/mkdist-declaration/build.config.ts

@@ -0,0 +1,12 @@
+import { defineBuildConfig } from "../../../src/index.js";
+
+export default defineBuildConfig({
+  entries: [
+    {
+      input: "./src/",
+      builder: "mkdist",
+    },
+  ],
+  outDir: "./dist/",
+  declaration: true,
+});

test/fixtures/mkdist-declaration/src/a.ts

@@ -0,0 +1,3 @@
+export function foo(): number {
+  return 42;
+}

test/fixtures/mkdist-declaration/src/index.ts

@@ -0,0 +1 @@
+export { foo } from "./a.js";

test/fixtures/mkdist-sourcemap/build.config.ts

@@ -0,0 +1,12 @@
+import { defineBuildConfig } from "../../../src/index.js";
+
+export default defineBuildConfig({
+  entries: [
+    {
+      input: "./src/",
+      builder: "mkdist",
+    },
+  ],
+  outDir: "./dist/",
+  sourcemap: true,
+});

test/fixtures/mkdist-sourcemap/src/a.ts

@@ -0,0 +1,3 @@
+export function foo(): number {
+  return 42;
+}

test/fixtures/mkdist-sourcemap/src/index.ts

@@ -0,0 +1 @@
+export { foo } from "./a.js";

test/fixtures/rollup-declaration/build.config.ts

@@ -0,0 +1,15 @@
+import { defineBuildConfig } from "../../../src/index.js";
+
+export default defineBuildConfig({
+  entries: [
+    {
+      input: "./src/index.ts",
+      builder: "rollup",
+    },
+  ],
+  outDir: "./dist/",
+  declaration: true,
+  rollup: {
+    emitCJS: true,
+  },
+});

test/fixtures/rollup-declaration/src/a.ts

@@ -0,0 +1,3 @@
+export function foo(): number {
+  return 42;
+}

test/fixtures/rollup-declaration/src/index.ts

@@ -0,0 +1 @@
+export { foo } from "./a.js";

test/fixtures/rollup-sourcemap/build.config.ts

@@ -0,0 +1,15 @@
+import { defineBuildConfig } from "../../../src/index.js";
+
+export default defineBuildConfig({
+  entries: [
+    {
+      input: "./src/index.ts",
+      builder: "rollup",
+    },
+  ],
+  outDir: "./dist/",
+  sourcemap: true,
+  rollup: {
+    emitCJS: true,
+  },
+});

test/fixtures/rollup-sourcemap/src/a.ts

@@ -0,0 +1,3 @@
+export function foo(): number {
+  return 42;
+}

test/fixtures/rollup-sourcemap/src/index.ts

@@ -0,0 +1 @@
+export { foo } from "./a.js";

test/validate.test.ts

@@ -23,7 +23,7 @@ describe("validatePackage", () => {
           ".": { node: "./src/index.mts" },
         },
       },
-      join(fileURLToPath(import.meta.url), "../fixture"),
+      join(fileURLToPath(import.meta.url), "../fixtures/default"),
       buildContext,
     );
 

tsconfig.json

@@ -17,5 +17,6 @@
     "noImplicitOverride": true,
     "noEmit": true
   },
-  "include": ["src", "test"]
+  "include": ["src", "test"],
+  "exclude": ["test/fixtures/**/dist"]
 }