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FagnerMartinsBrack
/ ReactTestRenderedComponent.js
Created
December 17, 2018 10:41
(Medium) - The Myth Of 100% Code Coverage
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| const renderedComponent = render(<Counter></Counter>); | |
| renderedComponent.querySelector('.count-button').click(); | |
| renderedComponent.querySelector('.count-button').click(); | |
| const renderedCount = renderedComponent | |
| .querySelector('.current-count') | |
| .innerHTML; | |
| expect(renderedCount).toEqual('2'); |
FagnerMartinsBrack
/ ReactTestingInternalsComponent.js
Created
December 17, 2018 10:40
(Medium) - The Myth Of 100% Code Coverage
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| const instance = render(<Counter></Counter>).getInstance(); | |
| instance.increment(); | |
| instance.increment(); | |
| expect(instance.getState()).toEqual({ count: 2 }); |
FagnerMartinsBrack
/ FinalCode.js
Created
November 22, 2018 10:45
(Medium) - How TDD Can Prevent Over-Engineering
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| const interestToPayFor = (loanAmount) => { | |
| const greaterThan2000 = { endOfRange: Money('$2000.00'), interestPerDollar: Money('$0.09'), previousInterestPerDollar: Money('$0.00') }; | |
| const greaterThan5000 = { endOfRange: Money('$5000.00'), interestPerDollar: Money('$0.14'), previousInterestPerDollar: Money('$0.09') }; | |
| const greaterThan10000 = { endOfRange: Money('$10000.00'), interestPerDollar: Money('$0.21'), previousInterestPerDollar: Money('$0.14') }; | |
| // You can move this into a configuration file so that changes | |
| // in the behavior doesn't require code changes | |
| const ranges = [greaterThan2000, greaterThan5000, greaterThan10000]; | |
| let interestAmount = Money('$0.00'); | |
| for (range of ranges) { | |
| if (loanAmount.greaterThan(range.endOfRange)) { |
FagnerMartinsBrack
/ DynamicIndex.diff
Created
November 22, 2018 10:44
(Medium) - How TDD Can Prevent Over-Engineering
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| let interestAmount = Money('$0.00'); | |
| - if (loanAmount.greaterThan(ranges[0].endOfRange)) { | |
| - interestAmount = interestAmount.plus(calculateInterest(loanAmount, ranges[0])); | |
| - } | |
| - | |
| - if (loanAmount.greaterThan(ranges[1].endOfRange)) { | |
| - interestAmount = interestAmount.plus(calculateInterest(loanAmount, ranges[1])); | |
| - } | |
| - |
FagnerMartinsBrack
/ CodeAfterConditionsHandleSingleCalculation.js
Created
November 22, 2018 10:42
(Medium) - How TDD Can Prevent Over-Engineering
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| const interestToPayFor = (loanAmount) => { | |
| const greaterThan2000 = { endOfRange: Money('$2000.00'), interestPerDollar: Money('$0.09'), previousInterestPerDollar: Money('$0.00') }; | |
| const greaterThan5000 = { endOfRange: Money('$5000.00'), interestPerDollar: Money('$0.14'), previousInterestPerDollar: Money('$0.09') }; | |
| const greaterThan10000 = { endOfRange: Money('$10000.00'), interestPerDollar: Money('$0.21'), previousInterestPerDollar: Money('$0.14') }; | |
| let interestAmount = Money('$0.00'); | |
| if (loanAmount.greaterThan(Money('$2000.00'))) { | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan2000)); | |
| } | |
| if (loanAmount.greaterThan(Money('$5000.00'))) { | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan5000)); |
FagnerMartinsBrack
/ RemoveDuplicationFor$5000Range.diff
Created
November 22, 2018 10:41
(Medium) - How TDD Can Prevent Over-Engineering
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| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan2000)); | |
| } | |
| - if (loanAmount.greaterThan(Money('$5000.00')) && loanAmount.lessThan(Money('$10001.00'))) { | |
| + if (loanAmount.greaterThan(Money('$5000.00'))) { | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan5000)); | |
| } | |
| if (loanAmount.greaterThan(Money('$10000.00'))) { | |
| - interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan5000)); |
FagnerMartinsBrack
/ RemoveDuplicationFor$2000Range.diff
Last active
November 22, 2018 10:41
(Medium) - How TDD Can Prevent Over-Engineering
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| let interestAmount = Money('$0.00'); | |
| - if (loanAmount.greaterThan(Money('$2000.00')) && loanAmount.lessThan(Money('$5001.00'))) { | |
| + if (loanAmount.greaterThan(Money('$2000.00'))) { | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan2000)); | |
| } | |
| if (loanAmount.greaterThan(Money('$5000.00')) && loanAmount.lessThan(Money('$10001.00'))) { | |
| - interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan2000)); | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan5000)); |
FagnerMartinsBrack
/ FocusOnTheTwoFirstConditions.js
Created
November 22, 2018 10:37
(Medium) - How TDD Can Prevent Over-Engineering
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| let interestAmount = Money('$0.00'); | |
| if (loanAmount.greaterThan(Money('$2000.00')) && loanAmount.lessThan(Money('$5001.00'))) { | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan2000)); | |
| } | |
| if (loanAmount.greaterThan(Money('$5000.00')) && loanAmount.lessThan(Money('$10001.00'))) { | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan2000)); | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan5000)); | |
| } |
FagnerMartinsBrack
/ SingleInterestAmountReturn.diff
Created
November 22, 2018 10:36
(Medium) - How TDD Can Prevent Over-Engineering
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| const greaterThan5000 = { endOfRange: Money('$5000.00'), interestPerDollar: Money('$0.14'), previousInterestPerDollar: Money('$0.09') }; | |
| const greaterThan10000 = { endOfRange: Money('$10000.00'), interestPerDollar: Money('$0.21'), previousInterestPerDollar: Money('$0.14') }; | |
| - if (loanAmount.greaterThan(Money('$2000.00')) && loanAmount.lessThan(Money('$5001.00'))) { | |
| - let interestAmount = Money('$0.00'); | |
| + let interestAmount = Money('$0.00'); | |
| + if (loanAmount.greaterThan(Money('$2000.00')) && loanAmount.lessThan(Money('$5001.00'))) { | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan2000)); | |
| - |
FagnerMartinsBrack
/ interestToPayForAfterYouRemoveDuplication.js
Created
November 22, 2018 10:35
(Medium) - How TDD Can Prevent Over-Engineering
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| const interestToPayFor = (loanAmount) => { | |
| const greaterThan2000 = { endOfRange: Money('$2000.00'), interestPerDollar: Money('$0.09'), previousInterestPerDollar: Money('$0.00') }; | |
| const greaterThan5000 = { endOfRange: Money('$5000.00'), interestPerDollar: Money('$0.14'), previousInterestPerDollar: Money('$0.09') }; | |
| const greaterThan10000 = { endOfRange: Money('$10000.00'), interestPerDollar: Money('$0.21'), previousInterestPerDollar: Money('$0.14') }; | |
| if (loanAmount.greaterThan(Money('$2000.00')) && loanAmount.lessThan(Money('$5001.00'))) { | |
| let interestAmount = Money('$0.00'); | |
| interestAmount = interestAmount.plus(calculateInterest(loanAmount, greaterThan2000)); | |
| return interestAmount; | |
| } | |
| if (loanAmount.greaterThan(Money('$5000.00')) && loanAmount.lessThan(Money('$10001.00'))) { |