openpgp: Introduce feature flag for quickcheck.

  - Make quickcheck dependency optional.

  - Make quickcheck a dev-dependency for tests.

  - Fix doctests for
    - cert::ValidCert::user_attributes,
    - cert::builder::CertBuilder::add_user_attribute,
    - cert::revoke::UserAttributeRevocationBuilder
    - cert::revoke::UserAttributeRevocationBuilder::build.
    Doctests do not use cfg(test), so we cannot use quickcheck in there.

1 files changed, 3 insertions, 0 deletions

diff --git a/openpgp/src/fingerprint.rs b/openpgp/src/fingerprint.rs
index 6094229f..a88dafdd 100644
--- a/openpgp/src/fingerprint.rs
+++ b/openpgp/src/fingerprint.rs
@@ -1,4 +1,6 @@
 use std::fmt;
+
+#[cfg(any(test, feature = "quickcheck"))]
 use quickcheck::{Arbitrary, Gen};
 
 /// A long identifier for certificates and keys.
@@ -206,6 +208,7 @@ impl Fingerprint {
     }
 }
 
+#[cfg(any(test, feature = "quickcheck"))]
 impl Arbitrary for Fingerprint {
     fn arbitrary<G: Gen>(g: &mut G) -> Self {
         use rand::Rng;