hal2dy /
html-scan
| Conditions | 1 |
| Paths | 1 |
| Total Lines | 58 |
| Lines | 0 |
| Ratio | 0 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
| 1 | const fs = require('fs') |
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| 7 | describe('Output helper', () => { |
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| 8 | const spyError = jest.spyOn(console, 'error').mockImplementation(() => {}) |
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| 9 | const spyLog = jest.spyOn(console, 'log').mockImplementation(() => {}) |
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| 10 | |||
| 11 | const file = 'src/test/output.txt' |
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| 12 | const path = join(file) |
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| 13 | |||
| 14 | it('output has empty data', () => { |
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| 15 | const result = outputHelper('', null) |
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| 16 | expect(result).toBe(null) |
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| 17 | }) |
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| 18 | |||
| 19 | it('output is console', () => { |
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| 20 | outputHelper(null, 'data') |
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| 21 | expect(spyLog).toHaveBeenCalled() |
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| 22 | expect(spyLog.mock.calls[0][0]).toContain('data') |
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| 23 | }) |
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| 24 | |||
| 25 | it('output to file', done => { |
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| 26 | fs.truncateSync(path) |
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| 27 | outputHelper(file, 'data') |
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| 28 | setTimeout(() => { |
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| 29 | try { |
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| 30 | expect(fs.readFileSync(path, 'utf8')).toBe('data\r\n') |
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| 31 | done() |
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| 32 | } catch (err) { |
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| 33 | done.fail(err) |
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| 34 | } |
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| 35 | }, TIMEOUT) |
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| 36 | }) |
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| 37 | |||
| 38 | it('output to not existed file', done => { |
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| 39 | const dummy = 'dummy.txt' |
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| 40 | outputHelper(dummy, 'data') |
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| 41 | setTimeout(() => { |
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| 42 | try { |
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| 43 | expect(spyError).toHaveBeenCalled() |
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| 44 | expect(spyError.mock.calls[0][0]).toContain('Cannot write file to') |
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| 45 | done() |
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| 46 | } catch (err) { |
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| 47 | done.fail(err) |
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| 48 | } |
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| 49 | }, TIMEOUT) |
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| 50 | }) |
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| 51 | |||
| 52 | it('output to write stream', done => { |
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| 53 | const writeable = fs.createWriteStream(path) |
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| 54 | outputHelper(writeable, 'data_stream') |
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| 55 | setTimeout(() => { |
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| 56 | try { |
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| 57 | expect(fs.readFileSync(path, 'utf8')).toBe('data_stream\r\n') |
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| 58 | done() |
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| 59 | } catch (err) { |
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| 60 | done.fail(err) |
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| 61 | } |
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| 62 | }, TIMEOUT) |
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| 63 | }) |
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| 64 | }) |
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| 65 |
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This checks looks for references to variables that have not been declared. This is most likey a typographical error or a variable has been renamed.
To learn more about declaring variables in Javascript, see the MDN.