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16 changes: 12 additions & 4 deletions src/splitInteger.test.js
Original file line number Diff line number Diff line change
Expand Up @@ -4,18 +4,26 @@ const splitInteger = require('./splitInteger');

test(`should split a number into equal parts
if a value is divisible by a numberOfParts`, () => {

expect(splitInteger(6, 2)).toEqual([3, 3]);
expect(splitInteger(10, 5)).toEqual([2, 2, 2, 2, 2]);
expect(splitInteger(9, 3)).toEqual([3, 3, 3]);
});

test(`should return a part equals to a value
when splitting into 1 part`, () => {

expect(splitInteger(8, 1)).toEqual([8]);
expect(splitInteger(0, 1)).toEqual([0]);

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The task description specifies that the value argument will always be a positive integer. While testing edge cases like 0 is a good habit, in this case, it's outside the function's contract as defined by the requirements, so this test case is not needed.

expect(splitInteger(100, 1)).toEqual([100]);
});

test('should sort parts ascending if they are not equal', () => {

expect(splitInteger(17, 4)).toEqual([4, 4, 4, 5]);
expect(splitInteger(32, 6)).toEqual([5, 5, 5, 5, 6, 6]);
expect(splitInteger(11, 3)).toEqual([3, 4, 4]);
});

test('should add zeros if value < numberOfParts', () => {

expect(splitInteger(2, 5)).toEqual([0, 0, 0, 1, 1]);
expect(splitInteger(1, 3)).toEqual([0, 0, 1]);
expect(splitInteger(3, 4)).toEqual([0, 1, 1, 1]);
});