Why didn't you choose Testcontainers?

Reasons for not using Testcontainers can vary, but the main ones are:

• Complexity and overhead: Testcontainers runs real Docker containers for tests, which requires a Docker environment and can slow down tests.

• Dependence on external services: In some projects, it is undesirable to have external dependencies in tests to ensure their stability and reproducibility.

• Control and customization: Sometimes, more fine-tuned configuration of the test environment is needed, which is difficult to achieve with Testcontainers.

• Compatibility and infrastructure: In some CI/CD environments or on developer machines, Docker support may be absent, making the use of Testcontainers impossible.

• Simplicity of alternatives: If tests can be covered with mocks or built-in test databases, using Testcontainers may be excessive.

Thus, the refusal of Testcontainers is often related to a balance between convenience, test speed, and infrastructure and stability requirements.