krb5 commit: Use expected_trace in test scripts

https://github.com/krb5/krb5/commit/7b7e5d964e5d020fdda3fb9843d9b8cf8b29a6f8
commit 7b7e5d964e5d020fdda3fb9843d9b8cf8b29a6f8
Author: Greg Hudson <[email protected]>
Date:   Tue Jan 17 11:25:22 2017 -0500

    Use expected_trace in test scripts

 src/tests/t_general.py |   24 ++++++++----------------
 src/tests/t_pkinit.py  |   15 ++++++---------
 2 files changed, 14 insertions(+), 25 deletions(-)

diff --git a/src/tests/t_general.py b/src/tests/t_general.py
index 6d523fe..16bf6c5 100755
--- a/src/tests/t_general.py
+++ b/src/tests/t_general.py
@@ -47,21 +47,13 @@ if 'not found in Kerberos database' not in out:
     fail('Expected error message not seen in kinit -C output')
 
 # Spot-check KRB5_TRACE output
-tracefile = os.path.join(realm.testdir, 'trace')
-realm.run(['env', 'KRB5_TRACE=' + tracefile, kinit, realm.user_princ],
-          input=(password('user') + "\n"))
-f = open(tracefile, 'r')
-trace = f.read()
-f.close()
-expected = ('Sending initial UDP request',
-            'Received answer',
-            'Selected etype info',
-            'AS key obtained',
-            'Decrypted AS reply',
-            'FAST negotiation: available',
-            'Storing [email protected]')
-for e in expected:
-    if e not in trace:
-        fail('Expected output not in kinit trace log')
+expected_trace = ('Sending initial UDP request',
+                  'Received answer',
+                  'Selected etype info',
+                  'AS key obtained',
+                  'Decrypted AS reply',
+                  'FAST negotiation: available',
+                  'Storing [email protected]')
+realm.kinit(realm.user_princ, password('user'), expected_trace=expected_trace)
 
 success('FAST kinit, trace logging')
diff --git a/src/tests/t_pkinit.py b/src/tests/t_pkinit.py
index 1839777..f561415 100755
--- a/src/tests/t_pkinit.py
+++ b/src/tests/t_pkinit.py
@@ -176,19 +176,16 @@ realm.klist(realm.user_princ)
 
 # Test a DH parameter renegotiation by temporarily setting a 4096-bit
 # minimum on the KDC.
-tracefile = os.path.join(realm.testdir, 'trace')
 minbits_kdc_conf = {'realms': {'$realm': {'pkinit_dh_min_bits': '4096'}}}
 minbits_env = realm.special_env('restrict', True, kdc_conf=minbits_kdc_conf)
 realm.stop_kdc()
 realm.start_kdc(env=minbits_env)
-realm.run(['env', 'KRB5_TRACE=' + tracefile, kinit, '-X',
-           'X509_user_identity=' + file_identity, realm.user_princ])
-with open(tracefile, 'r') as f:
-    trace = f.read()
-if ('Key parameters not accepted' not in trace or
-    'Preauth tryagain input types' not in trace or
-    'trying again with KDC-provided parameters' not in trace):
-    fail('DH renegotiation steps not found in kinit trace log')
+expected_trace = ('Key parameters not accepted',
+                  'Preauth tryagain input types',
+                  'trying again with KDC-provided parameters')
+realm.kinit(realm.user_princ,
+            flags=['-X', 'X509_user_identity=%s' % file_identity],
+            expected_trace=expected_trace)
 realm.stop_kdc()
 realm.start_kdc()