rs-basic/members/revsqrt/tests/features/book/revsqrt.feature

130 lines
3.7 KiB
Gherkin

Feature: inverted square root calculation
Scenario: fast inverted sqrt is about the same as the regular inverted sqrt
Given a number
When we calculate the inverted square root of it using the fast inverted square root algorithm
Then the result is about the same as if we calculate it normally
Scenario: Can the fast inverted sqrt be calculated?
Given a number
When we calculate the inverted square root of it using the fast inverted square root algorithm
Then the result can be calculated
Scenario: Can the regular inverted sqrt be calculated?
Given a number
When we calculate the inverted square root of it normally
Then the result can be calculated
Scenario: Calculate fast inverted sqrt with specific numbers
Given the number n
| n |
| 1 |
| 1.1 |
| 100 |
| 1337 |
| 123.45678900 |
| 1337.1337 |
When we calculate the inverted square root of it using the fast inverted square root algorithm
Then the result is about the same as m
| m |
| 1 |
| 0.9534625892455922 |
| 0.1 |
| 0.02734854943722097 |
| 0.0900000004095 |
| 0.027347182112297627 |
Scenario: Calculate regular inverted sqrt with specific numbers
Given the number n
| n |
| 1 |
| 1.1 |
| 100 |
| 1337 |
| 123.45678900 |
| 1337.1337 |
When we calculate the inverted square root of it normally
Then the result is m
| m |
| 1 |
| 0.9534625892455922 |
| 0.1 |
| 0.02734854943722097 |
| 0.0900000004095 |
| 0.027347182112297627 |
Scenario: Some numbers are about the same (0)
Given the number n
| n |
| 1 |
| 0.9 |
| 1.0001 |
| 1.1001 |
| 1.1050 |
| 0.999 |
| 0.9999999999 |
Then they are about the same
Scenario: Some numbers are about the same (1)
Given the number n
| n |
| 10 |
| 10.0001 |
| 9.997 |
| 10.025 |
Then they are about the same
Scenario: Some numbers are about the same (-3)
Given the number n
| n |
| -1000 |
| -1000.1 |
| -1001.1 |
Then they are about the same
Scenario: Some numbers are about the same (3)
Given the number n
| n |
| -1000 |
| -1000.1 |
| -1001.1 |
Then they are about the same
Scenario: Some numbers are about the same (7)
Given the number n
| n |
| 10000000 |
| 10000000 |
| 10000300 |
| 10000000.1 |
| 10000001.1 |
Then they are about the same
Scenario: Some numbers are not about the same (1)
Given the number n
| n |
| 2 |
| -2 |
| 0 |
| 20 |
| 20000 |
Then they are not about the same
Scenario: Some numbers are not about the same (7)
Given the number n
| n |
| 10000000 |
| 10001000 |
| 0 |
| 20000001.1 |
Then they are not about the same
Scenario: Test if we can use the asterisk
Given a number
* a number
* a number
* a number
* a number
When we calculate the inverted square root of it normally
Then the result can be calculated