test(conditions): adding test that fails on vite6 without this change

test/config/fixtures/conditions-subpackage/module.js

@@ -0,0 +1 @@
+export default 'module'

test/config/fixtures/default-conditions/default-conditions.test.js

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+import { test, expect } from 'vitest';
+import condition from './dependency';
+
+test('condition is correct', () => {
+  expect(condition).toBe(TEST_CONDITION)
+})

test/config/fixtures/default-conditions/dependency/default.js

@@ -0,0 +1 @@
+throw new Error('Should not be imported')

test/config/fixtures/default-conditions/dependency/module.js

@@ -0,0 +1 @@
+export default 'module'

test/config/fixtures/default-conditions/dependency/node.js

@@ -0,0 +1 @@
+export default 'node'

test/config/fixtures/default-conditions/dependency/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "dependency",
+  "private": true,
+  "type": "module",
+  "exports": {
+    ".": {
+      "module": "./module.js",
+      "node": "./node.js",
+      "default": "./default.js"
+    }
+  }
+}

test/config/fixtures/default-conditions/vitest.config.ts

@@ -0,0 +1,3 @@
+import { defineConfig } from 'vitest/config'
+
+export default defineConfig({})

test/config/test/default-conditions.test.ts

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+import { expect, test } from 'vitest'
+import { runVitest } from '../../test-utils'
+
+test('correctly imports "module" dependency with default resolve.conditions', async () => {
+  // dev condition is the default
+  const { stderr } = await runVitest({
+    root: 'fixtures/default-conditions',
+    server: {
+      deps: {
+        external: [/dependency/],
+      },
+    },
+  }, [], 'test', {
+    define: {
+      TEST_CONDITION: '"module"',
+    },
+  })
+
+  expect(stderr).toBe('')
+})