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'use strict';
const common = require('../common');
const fixtures = require('../common/fixtures');
const fs = require('fs');
// This test ensures that appropriate TypeError is thrown by createReadStream
// when an argument with invalid type is passed
const example = fixtures.path('x.txt');
// Should not throw.
fs.createReadStream(example, undefined);
fs.createReadStream(example, null);
fs.createReadStream(example, 'utf8');
fs.createReadStream(example, { encoding: 'utf8' });
const createReadStreamErr = (path, opt, error) => {
common.expectsError(() => {
fs.createReadStream(path, opt);
}, error);
};
const typeError = {
code: 'ERR_INVALID_ARG_TYPE',
type: TypeError
};
const rangeError = {
code: 'ERR_OUT_OF_RANGE',
type: RangeError
};
[123, 0, true, false].forEach((opts) =>
createReadStreamErr(example, opts, typeError)
);
// Case 0: Should not throw if either start or end is undefined
[{}, { start: 0 }, { end: Infinity }].forEach((opts) =>
fs.createReadStream(example, opts)
);
// Case 1: Should throw TypeError if either start or end is not of type 'number'
[
{ start: 'invalid' },
{ end: 'invalid' },
{ start: 'invalid', end: 'invalid' }
].forEach((opts) => createReadStreamErr(example, opts, typeError));
// Case 2: Should throw RangeError if either start or end is NaN
[{ start: NaN }, { end: NaN }, { start: NaN, end: NaN }].forEach((opts) =>
createReadStreamErr(example, opts, rangeError)
);
// Case 3: Should throw RangeError if either start or end is negative
[{ start: -1 }, { end: -1 }, { start: -1, end: -1 }].forEach((opts) =>
createReadStreamErr(example, opts, rangeError)
);
// Case 4: Should throw RangeError if either start or end is fractional
[{ start: 0.1 }, { end: 0.1 }, { start: 0.1, end: 0.1 }].forEach((opts) =>
createReadStreamErr(example, opts, rangeError)
);
// Case 5: Should not throw if both start and end are whole numbers
fs.createReadStream(example, { start: 1, end: 5 });
// Case 6: Should throw RangeError if start is greater than end
createReadStreamErr(example, { start: 5, end: 1 }, rangeError);
// Case 7: Should throw RangeError if start or end is not safe integer
const NOT_SAFE_INTEGER = 2 ** 53;
[
{ start: NOT_SAFE_INTEGER, end: Infinity },
{ start: 0, end: NOT_SAFE_INTEGER }
].forEach((opts) =>
createReadStreamErr(example, opts, rangeError)
);
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