Validation

Validate that all dependencies can be resolved before runtime.

Usage

from inversipy import Container, ValidationError

container = Container()
container.register(ServiceA)
container.register(ServiceB)  # Depends on ServiceA
container.register(ServiceC)  # Depends on ServiceX (not registered)

try:
    container.validate()
except ValidationError as e:
    print(f"Validation failed with {len(e.errors)} errors:")
    for error in e.errors:
        print(f"  - {error}")

What's Checked

• Circular dependencies - detected via depth-first search on the dependency graph
• Missing dependencies - every registered type must have all required parameters resolvable
• Ambiguous dependencies - multiple implementations without named disambiguation

All errors are collected and reported at once, so you can fix them in a single pass.

Tip

Call container.validate() at application startup to catch configuration errors early.