Function test_coverage_percent 

pub fn test_coverage_percent(covered: f64, total: f64) -> Option<f64>

Test coverage as a percentage: covered lines (or branches) / total × 100.

Coverage measures whether code executed during a test run, not whether the test meaningfully verified its behaviour. Use it to find untested code (a floor), not as a ceiling to maximize; pair it with mutation_kill_rate_percent to check that the covered code is actually being verified.

Arguments

• covered — lines, branches, or paths executed by the test suite.
• total — total lines, branches, or paths in the measured code.

Returns

Some(percentage) (e.g. 95.0 for 95%), or None when total is zero (coverage undefined — there is no code to cover).

Examples

use software_engineering::test_effectiveness::test_coverage_percent;

// A company-wide 95% coverage requirement, met at face value.
assert_eq!(test_coverage_percent(95.0, 100.0), Some(95.0));
assert_eq!(test_coverage_percent(1.0, 0.0), None);