yanncourtel / fluent-validation-kata

A kata to discover FluentValidation in c#

Fluent Validation Kata

Kata to start with FluentValidation library.

Packages

• FluentAssertions
• FluentValidation
• Xunit

Your task

Implement a validator for the Product class satisfying the following rules.

Validation Rules

Product

• A mandatory property is neither null nor empty nor blank
• Properties Reference, Language, Gtin, SellerId and CategoryId are mandatory
• The Language is ISO 639-1 compliant (2 chars string, lower case)
• The Gtin allows GTIN-8, GTIN-12, GTIN-13 and GTIN-14 formats
• If provided, the Description is neither empty nor blank
• If provided, there must be between 2 and 5 pictures
• The CategoryId is a sequence of 2, 4 or 6 uppercase letters

Need some help ?

Strategy

• Create extension methods to group common validation patterns
• Create custom validators for complex property validation

GTIN Check Digit Calculator

Format	Digit position
GTIN-8							N1	N2	N3	N4	N5	N6	N7	N8
GTIN-12			N1	N2	N3	N4	N5	N6	N7	N8	N9	N10	N11	N12
GTIN-13		N1	N2	N3	N4	N5	N6	N7	N8	N9	N10	N11	N12	N13
GTIN-14	N1	N2	N3	N4	N5	N6	N7	N8	N9	N10	N11	N12	N13	N14
Step 1	Multiply value of each position by :
	x3	x1	x3	x1	x3	x1	x3	x1	x3	x1	x3	x1	x3	x0
Step 2	Add results together to create sum
Step 3	Subtract the sum from the nearest equal or higher multiple of ten = CHECK DIGIT

See https://www.gs1us.org/tools/check-digit-calculator for more details