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fix: parse error in import.meta.env assignment #10586

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fix: parse error in import.meta.env assignment #10586

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4580177
fix: parse error in import.meta.env assignment
yamachi4416 Jun 12, 2026
d677d39
Merge branch 'main' into fix/import-meta-env-assignment
yamachi4416 Jun 21, 2026
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2 changes: 1 addition & 1 deletion packages/vitest/src/node/plugins/metaEnvReplacer.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@ export function MetaEnvReplacerPlugin(): Plugin {
s.overwrite(
startIndex,
endIndex,
`Object.assign(/* istanbul ignore next */ globalThis.__vitest_worker__?.metaEnv ?? import.meta.env)`,
`Array(/* istanbul ignore next */ globalThis.__vitest_worker__?.metaEnv ?? import.meta.env)[0]`,
)
}

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10 changes: 10 additions & 0 deletions test/browser/test/env.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -42,3 +42,13 @@ test('PROD, DEV, SSR should be boolean', () => {
import.meta.env.SSR = true
expect(import.meta.env.SSR).toEqual(true)
})

test('ignores assignments to import.meta.env', () => {
const env = import.meta.env
// @ts-expect-error for testing
import.meta.env = {}
expect(import.meta.env).toBe(env)
// @ts-expect-error for testing
import.meta.env = import.meta.env || {}
expect(import.meta.env).toBe(env)
})
10 changes: 10 additions & 0 deletions test/unit/test/env.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,16 @@ test('PROD, DEV, SSR should be boolean', () => {
expect(import.meta.env.SSR).toEqual(false)
})

test('ignores assignments to import.meta.env', () => {
const env = import.meta.env
// @ts-expect-error for testing
import.meta.env = {}
expect(import.meta.env).toBe(env)
// @ts-expect-error for testing
import.meta.env = import.meta.env || {}
expect(import.meta.env).toBe(env)
})

test.runIf(process.platform === 'win32')('main process env variables are case insensitive', () => {
expect(process.env.PROGRAMFILES).toBeDefined()
expect(process.env['PROGRAMFILES(X86)']).toBeDefined()
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