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package matchers
import (
"fmt"
"github.com/onsi/gomega/format"
)
type HavePrefixMatcher struct {
Prefix string
Args []interface{}
}
func (matcher *HavePrefixMatcher) Match(actual interface{}) (success bool, err error) {
actualString, ok := toString(actual)
if !ok {
return false, fmt.Errorf("HavePrefix matcher requires a string or stringer. Got:\n%s", format.Object(actual, 1))
}
prefix := matcher.prefix()
return len(actualString) >= len(prefix) && actualString[0:len(prefix)] == prefix, nil
}
func (matcher *HavePrefixMatcher) prefix() string {
if len(matcher.Args) > 0 {
return fmt.Sprintf(matcher.Prefix, matcher.Args...)
}
return matcher.Prefix
}
func (matcher *HavePrefixMatcher) FailureMessage(actual interface{}) (message string) {
return format.Message(actual, "to have prefix", matcher.prefix())
}
func (matcher *HavePrefixMatcher) NegatedFailureMessage(actual interface{}) (message string) {
return format.Message(actual, "not to have prefix", matcher.prefix())
}
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