Introduction

DbContextBuilder is a fluent builder for Entity Framework DbContext instances intended for use in tests. It wraps the boilerplate of configuring an in-memory provider, seeding data, and building a context into a single chainable API so test setup looks like the data the test cares about — not the plumbing.

Why a builder?

Tests that need a DbContext usually need one with:

• A specific provider (InMemory, SQLite in-memory, etc.) so the test does not touch a real database
• Specific rows of specific entities so the assertions are predictable
• Sometimes additional random rows so the SUT sees realistic data volumes
• An options builder configured exactly the way the test scenario expects

Wiring those up manually for every test costs a lot of repeated lines. DbContextBuilder<T> collapses them into:

var context = await new DbContextBuilder<MyDbContext>()
    .UseInMemory()
    .SeedWith(new User { Id = 1, Name = "Alice" })
    .SeedWithRandom<Order>(20)
    .BuildAsync();

The same builder works against the InMemory provider, SQLite in-memory, and a SQL-Server-compatibility SQLite mode that flattens schema-qualified table names so a typical production DbContext can be exercised without code changes.

Package family

DbContextBuilder ships one package per supported EF version so you can install only what you need:

• Wolfgang.DbContextBuilder-Core-EF6 through -Core-EF10 — pinned to a single EF Core major
• Wolfgang.DbContextBuilder-EF6 — for projects still on classic Entity Framework 6 (System.Data.Entity)

Pick the one that matches your project's EF flavor. See the README for the full installation matrix.

Where to go next

• Getting started — install, build a first DbContext, run a first test
• API — generated reference for every public type