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coverage.go
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coverage.go
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package coverage
import (
"fmt"
"io"
"os"
"runtime"
"strings"
"testing"
)
type testingM interface {
Run() int
}
var (
// used for overriding during unit tests
coverModeFunc = testing.CoverMode
coverageFunc = testing.Coverage
writer = io.Writer(os.Stdout)
exitFunc = os.Exit
)
func Run(t testingM, c float64, callbacks ...func()) {
var code int
defer func() {
exitFunc(code)
}()
code = t.Run()
if coverModeFunc() == "" {
fmt.Fprintf(
writer,
"\nFAIL coverage is not enabled. You can enable by using `-cover`\n\n",
)
code = 1
} else {
coverage := coverageFunc()
if coverage*100 < c {
code = 1
fmt.Fprintf(writer, "\nFAIL Coverage threshold not met %.1f >= %.1f for %s\n\n", c, coverage*100, packageName())
}
}
for _, callback := range callbacks {
callback()
}
}
func packageName() string {
pc, _, _, _ := runtime.Caller(2)
funcName := runtime.FuncForPC(pc).Name()
lastSlash := strings.LastIndexByte(funcName, '/')
if lastSlash < 0 {
lastSlash = 0
}
lastDot := strings.LastIndexByte(funcName[lastSlash:], '.') + lastSlash
return funcName[:lastDot]
}