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20 lines
484 B
Go

package testutil
import (
"strings"
"testing"
)
// RequireErrorContains is a test helper for asserting that an error occurred
// and the error message returned contains the expected error message as a
// substring.
func RequireErrorContains(t *testing.T, err error, expectedErrorMessage string) {
t.Helper()
if err == nil {
t.Fatal("An error is expected but got nil.")
}
if !strings.Contains(err.Error(), expectedErrorMessage) {
t.Fatalf("unexpected error: %v", err)
}
}