thelpers.py: use t/tmp as the tmpdir parent

[bup.git] / lib / bup / t / thelpers.py

diff --git a/lib/bup/t/thelpers.py b/lib/bup/t/thelpers.py
index d260f8e767a57655796cd8e0c02efce306e89879..97438142dcf71a01ed3fd5d5dc5ded141c89fcf9 100644 (file)
--- a/lib/bup/t/thelpers.py
+++ b/lib/bup/t/thelpers.py
@@ -1,10 +1,15 @@
 import helpers
 import math
 import os
+import os.path
+import tempfile
+import stat
 import bup._helpers as _helpers
 from bup.helpers import *
 from wvtest import *
 
+bup_tmp = os.path.realpath('../../../t/tmp')
+mkdirp(bup_tmp)
 
 @wvtest
 def test_next():
@@ -116,3 +121,50 @@ def test_readpipe():
         readpipe(['bash', '-c', 'exit 42'])
     except Exception, ex:
         WVPASSEQ(str(ex), "subprocess 'bash -c exit 42' failed with status 42")
+
+
+@wvtest
+def test_batchpipe():
+    for chunk in batchpipe(['echo'], []):
+        WVPASS(False)
+    out = ''
+    for chunk in batchpipe(['echo'], ['42']):
+        out += chunk
+    WVPASSEQ(out, '42\n')
+    try:
+        batchpipe(['bash', '-c'], ['exit 42'])
+    except Exception, ex:
+        WVPASSEQ(str(ex), "subprocess 'bash -c exit 42' failed with status 42")
+    args = [str(x) for x in range(6)]
+    # Force batchpipe to break the args into batches of 3.  This
+    # approach assumes all args are the same length.
+    arg_max = \
+        helpers._argmax_base(['echo']) + helpers._argmax_args_size(args[:3])
+    batches = batchpipe(['echo'], args, arg_max=arg_max)
+    WVPASSEQ(next(batches), '0 1 2\n')
+    WVPASSEQ(next(batches), '3 4 5\n')
+    WVPASSEQ(next(batches, None), None)
+    batches = batchpipe(['echo'], [str(x) for x in range(5)], arg_max=arg_max)
+    WVPASSEQ(next(batches), '0 1 2\n')
+    WVPASSEQ(next(batches), '3 4\n')
+    WVPASSEQ(next(batches, None), None)
+
+
+@wvtest
+def test_atomically_replaced_file():
+    tmpdir = tempfile.mkdtemp(dir=bup_tmp, prefix='bup-thelper-')
+    target_file = os.path.join(tmpdir, 'test-atomic-write')
+    initial_failures = wvfailure_count()
+
+    with atomically_replaced_file(target_file, mode='w') as f:
+        f.write('asdf')
+        WVPASSEQ(f.mode, 'w')
+    f = open(target_file, 'r')
+    WVPASSEQ(f.read(), 'asdf')
+
+    with atomically_replaced_file(target_file, mode='wb') as f:
+        f.write(os.urandom(20))
+        WVPASSEQ(f.mode, 'wb')
+
+    if wvfailure_count() == initial_failures:
+        subprocess.call(['rm', '-rf', tmpdir])