Introduce save load test

[deliverable/lttng-ivc.git] / lttng_ivc / utils / utils.py

diff --git a/lttng_ivc/utils/utils.py b/lttng_ivc/utils/utils.py
index 9bc9d8c8a47515b6488c382ec12eaed88dacf275..37e09e197226ec1b9c9abf9a5da5f17aaa60ae6a 100644 (file)
--- a/lttng_ivc/utils/utils.py
+++ b/lttng_ivc/utils/utils.py
@@ -4,8 +4,10 @@ import os
 import time
 import socket
 
+from lxml import etree
 from contextlib import closing
 
+
 def line_count(file_path):
     line_count = 0
     with open(file_path) as f:
@@ -62,9 +64,41 @@ def find_free_port():
         return s.getsockname()[1]
 
 
-def file_contains(stderr_file, list_of_string):
-    with open(stderr_file, 'r') as stderr:
-        for line in stderr:
+def file_contains(file_path, list_of_string):
+    with open(file_path, 'r') as f:
+        for line in f:
             for s in list_of_string:
                 if s in line:
                     return True
+
+
+def find_dir(root, name):
+    """
+    Returns the absolute path or None.
+    """
+    abs_path = None
+    for base, dirs, files in os.walk(root):
+        for tmp in dirs:
+            if tmp.endswith(name):
+                abs_path = os.path.abspath(os.path.join(base, tmp))
+    return abs_path
+
+
+def xpath_query(xml_file, xpath):
+    """
+    Return a list of xml node corresponding to the xpath. The list can be of lenght
+    zero.
+    """
+    with open(xml_file, 'r') as f:
+        tree = etree.parse(f)
+        root = tree.getroot()
+        # Remove all namespace
+        # https://stackoverflow.com/questions/18159221/remove-namespace-and-prefix-from-xml-in-python-using-lxml
+        for elem in root.getiterator():
+            if not hasattr(elem.tag, 'find'):
+                continue
+            i = elem.tag.find('}')
+            if i >= 0:
+                elem.tag = elem.tag[i+1:]
+
+        return root.xpath(xpath)