.gremlins.toml

# Gremlins mutation testing configuration
# Run with: gremlins unleash ./...
# Documentation: https://gremlins.dev/

# Timeout for each mutation test
[global]
timeout = "30s"

# Only run on packages with tests
[filter]
# Exclude integration tests to speed up mutation testing
tags = ["!integration", "!e2e"]

# Exclude vendor and test files
exclude = [
    "**/vendor/**",
    "**/*_test.go",
    "**/testdata/**",
    "**/mocks/**",
]

# Target specific packages for mutation testing
include = [
    "./internal/rpchandler/...",
    "./internal/email/...",
    "./internal/resettoken/...",
    "./internal/validators/...",
    "./internal/ratelimit/...",
    "./internal/options/...",
]

# Mutation operators to use
[mutators]
# Arithmetic mutations: + -> -, * -> /, etc.
arithmetic = true

# Comparison mutations: == -> !=, < -> <=, etc.
comparison = true

# Logical mutations: && -> ||, ! -> (nothing), etc.
logical = true

# Increment/decrement mutations: ++ -> --, etc.
incdec = true

# Conditional boundary mutations: < -> <=, etc.
conditional = true

# Return value mutations
return_vals = true

# Void method call removal
void_call = false

# Constructor call mutations (usually too disruptive)
constructor_calls = false

# Output configuration
[output]
# Generate JSON report for CI integration
format = "json"
file = "mutation-report.json"

# Threshold configuration
[threshold]
# Minimum mutation score to pass (percentage)
# Start conservative and increase as coverage improves
score = 70.0

# Parallelism
[execution]
# Number of parallel workers
workers = 4