Extend pwhashing with limits

In the EQC tests, we generate limits at random and verify things work.

CHANGELOG.md

@@ -13,10 +13,6 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
   - sign
 
 - Implement missing EQC tests
-  - Generichash
-  - Multi-part generic hash
-  - pwhash
-    - Extend with limit for ops and memory as well.
 
 ## [Unreleased]
 

eqc_test/enacl_eqc.erl

@@ -762,12 +762,14 @@ pwhash_str_verify(PasswdHash, Passwd) ->
   end.
 
 prop_pwhash_str_verify() ->
-    ?FORALL({Passwd},
+    ?FORALL({Passwd, OLimit, MLimit},
-            {?FAULT_RATE(1, 40, g_iodata())},
+            {?FAULT_RATE(1, 40, g_iodata()),
+             elements([interactive, moderate, sensitive]),
+             elements([interactive, moderate, sensitive])},
             begin
                 case v_iodata(Passwd) of
                     true ->
-                        Ascii = enacl:pwhash_str(Passwd),
+                        Ascii = enacl:pwhash_str(Passwd, OLimit, MLimit),
                         S = enacl:pwhash_str_verify(Ascii, Passwd),
                         equals(S, true);
                     false ->