43 lines
1.1 KiB
JavaScript
43 lines
1.1 KiB
JavaScript
'use strict';
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var test = require('tape');
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var getProto = require('get-proto');
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var semver = require('semver');
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var getGeneratorFunction = require('generator-function');
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test('getGeneratorFunction', function (t) {
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var result = getGeneratorFunction();
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/* eslint-env browser */
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if (typeof window === 'undefined' && typeof process !== 'undefined') {
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t.equal(
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!!result,
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semver.satisfies(process.version, '>= 1'),
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'result is present or absent as expected for node ' + process.version
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);
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}
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t.test('exists', { skip: !result }, function (st) {
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if (result && getProto) { // TS can't infer `skip`, or that getProto definitely exists if GeneratorFunction exists
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st.equal(typeof result, 'function', 'is a function');
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st.equal(getProto(result), Function, 'extends Function');
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var iterator = result('a', 'return a')(42);
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st.deepEqual(iterator.next(), { value: 42, done: true }, 'returns a generator function which returns an iterator');
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} else {
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st.fail('should never get here');
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}
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st.end();
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});
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t.test('does not exist', { skip: !!result }, function (st) {
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st.equal(result, false, 'is false');
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st.end();
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});
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t.end();
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});
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