calculator stories

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Story #1 As an Accountant

I want to add two numbers

so that I can see what the total is

Acceptance CriteriaGiven I have two numbers 2 and 3

When I add them

Then I should see the sum as 5


I want to subtract two numbers

so that I can see what the difference between them is


When I subtract them

Then I should see the difference as -1


I want to divide two numbers

so that I can know the quotient

Acceptance Criteria #1Given I have two numbers 2 and 3

When I divide them

Then I should see the quotient as 0.666666

Acceptance Criteria #2Given I have two numbers 2 and 0

When I divide them

Then I should see the quotient as ‘Infinity’


I want to multiply two numbers

so that I can see what their product is


When I multiply them

Then I should see the product as 6


I want to toggle the sign of numbers

so that I can reverse them at will

Acceptance Criteria #1Given I have number 2

When I press the toggle key (‘+/-’)

Then I should see -2 on the display

Acceptance Criteria #2Given I have number -2

When I press the toggle key (‘+/-’)

Then I should see 2 on the display


I want to delete a wrongly entered digit

so that I can correct the number to input.

Acceptance Criteria #1Given I have pressed keys 2, 3, 4

When I press the backspace key

Then I should see 23 on the display

Acceptance Criteria #2Given I have pressed a key 2

When I press the backspace key

Then I should see ‘0’ on the display


I want to store number in memory

so that I can use it later

Acceptance Criteria #1Given I press ‘2’ on the keypad

When I press ‘M in’ key

Then the number 2 should be stored in memory

and the status bar on the display should show ‘M’

and the display should show ‘0’ to indicate that the calculator is ready for next operation

Acceptance Criteria #2Given that the status bar on the display shows ‘M’

When I recall the number by pressing the ‘R-CM’ key

Then I should see the originally stored number on the display

and be able to use that number for any operation.


I want to reset the calculator

so that I can start afresh

Acceptance Criteria #1Given I am in middle of an operation

When I press ‘CE’ (Clear Everything) key

Then the operation should be cancelled

and the display should show ‘0’ to indicate that the calculator is ready for next operation.

Acceptance Criteria #2Given that the display status bar on the display shows ‘M’

When I press ‘CE’ (Clear Everything) key

Then I memory should be cleared

and the display status bar should not show ‘M’

and the display should show ‘0’ to indicate that the calculator is ready for next operation

Story #9As an Accountant

I want to store operations in memory

so that I can recall them to see the steps that resulted in the final answer

Acceptance CriteriaGiven I have performed two operations

2 * 3 = 6 and 6 + 3 = 9

When I replay the operations by pressing the step key

Then I should see the following on the display in order

Upon pressing the ‘Step’ key once I should see 2 * 3 = 6

Upon pressing the ‘Step’ key again, I should see 6 + 3 = 9

calculator stories

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