TDDTesting

The main target of this repository is learning about TDD, requirements engineering and unit tests using jUnit 5 and Java SE 8. Bonus! Also, learning unit testing on Python

"Test-driven development (TDD) is a software development process that relies on the repetition of a very short development cycle: requirements are turned into very specific test cases, then the software is improved to pass the new tests." — Wikipedia

Pitcher Requirements

• Once a pitcher is created, its content will be 0
• Once a pitcher is empty, its content will be 0
• Full refilling a pitcher will make its content will be equals to its capacity
• Let a be the content of the Pitcher A and let b be the capacity of the Pitcher B. If a > b then, if B is refilled with A then the content of B will be equals to b and the content of A is equals to a - b.
• If the pitcher is going to be refilled with a content higher than its capacity, then the content will be equals to its capacity

Matrix Requirements

• The smallest dimension of a matrix is 1x1.
• When a matrix is created, every element of the matrix is equals to 0
• To add two matrices, both must have same dimensions
• To subtract two matrices, both must have same dimensions
• Let AxB be the dimensions of the Matrix m1 and let CxD the dimensions of another Matrix m2, to multiply m1 * m2 , B must be equals to C and the resultant matrix dimension is AxD
• Let c be a scalar number and m1 a Matrix. Multiplying c with m1 is equals to multiply every element in m1 with c. In other words. ∀ x ∈ m1, y = x * c being y the elements of the resulting matrix.
• Let c be a scalar number and m1 a Matrix. Dividing c with m1 is equals to divide every element in m1 with c. In other words. ∀ x ∈ m1, c ≠ 0, y = x / c being y the elements of the resulting matrix.
• Let m1 be a Matrix and m2 its transposed. m1[x][y] == m2[y][x] for every x and y belonging to AxB (m1 and m2 dimension).
• The determinant of a Matrix is calculated with the Sarrus rule (3x3 Matrices), with the generic formula (2x2) or just is the element (1x1). (Not sure about my english over here lol)

FizzBuzz

• If the number is divisible by 3, return Fizz
• If the number is divisible by 5, return Buzz
• If the number is divisible by 3 and 5, return FizzBuzz
• In the other cases, return the number

The String Calculator

Solving the String Calculator from Roy Osherove's page

• An empty string returns zero
• A single number returns the value
• Two numbers, comma delimited, returns the sum
• Two numbers, newline delimited, returns the sum
• Three numbers, delimited either way, returns the sum
• Negative numbers throw an exception
• Numbers greater than 1000 are ignored
• A single char delimiter can be defined on the first line (e.g. //# for a # as the delimiter)
• A multi char delimiter can be defined on the first line (e.g. //[###] for ### as the delimiter)
• Many single or multi-char delimiters can be defined (each wrapped in square brackets)

Password Verifier

Solving the password verifier kata from Roy Osherove's page

• password should be larger than 8 character
• password should not be null
• password should have one uppercase letter at least
• password should have one lowercase letter at least
• password should have one number at least

Done until this point.

Advanced

Todo

• Password is OK if at least three of the previous conditions is true
• Password is never OK if item 1.4 (1 lowercase at least) is false

Euros

A wrapper class to represent euros and it's behaviour.

Bonus!

All the code wrote in Java is being written in Python (just for fun and learning unit testing in Python)