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swc transpiler returns undefined after first value is echoed #1478

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swc transpiler returns undefined after first value is echoed #1478

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10 changes: 10 additions & 0 deletions src/test/repl/repl.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -30,6 +30,16 @@ test('should run REPL when --interactive passed and stdin is not a TTY', async (
expect(stdout).toBe('> 123\n' + 'undefined\n' + '> ');
});

test('should echo a value when using the swc transpiler', async () => {
const execPromise = exec(
`${CMD_TS_NODE_WITH_PROJECT_FLAG} --interactive --transpiler ts-node/transpilers/swc-experimental`
);
execPromise.child.stdin!.end('400\n401\n');
const { err, stdout } = await execPromise;
expect(err).toBe(null);
expect(stdout).toBe('> 400\n>401\n > ');
});

test('REPL has command to get type information', async () => {
const execPromise = exec(`${CMD_TS_NODE_WITH_PROJECT_FLAG} --interactive`);
execPromise.child.stdin!.end('\nconst a = 123\n.type a');
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