Node.set_auto_conf is improved

- we do not touch existing values
- escaping of '\n', '\r', '\t', '\b' and '\\' is added
- translation of bool into 'on|off' is added

test_set_auto_conf is updated.

Author: dmitry-lipetsk

testgres/node.py

@@ -1626,11 +1626,6 @@ def set_auto_conf(self, options, config='postgresql.auto.conf', rm_options={}):
 
             name, var = line.partition('=')[::2]
             name = name.strip()
-            var = var.strip()
-
-            # Handle quoted values and remove escaping
-            if var.startswith("'") and var.endswith("'"):
-                var = var[1:-1].replace("''", "'")
 
             # Remove options specified in rm_options list
             if name in rm_options:
@@ -1640,14 +1635,18 @@ def set_auto_conf(self, options, config='postgresql.auto.conf', rm_options={}):
 
         for option in options:
             value = options[option]
-            if isinstance(value, str):
-                value = value.replace("'", "\\'")
+            valueType = type(value)
+
+            if valueType == str:
+                value = __class__._escape_config_value(value)
+            elif valueType == bool:
+                value = "on" if value else "off"
+
             current_options[option] = value
 
         auto_conf = ''
         for option in current_options:
-            auto_conf += "{0} = '{1}'\n".format(
-                option, current_options[option])
+            auto_conf += option + " = " + str(current_options[option]) + "\n"
 
         for directive in current_directives:
             auto_conf += directive + "\n"
@@ -1695,6 +1694,28 @@ def _get_bin_path(self, filename):
             bin_path = get_bin_path(filename)
         return bin_path
 
+    def _escape_config_value(value):
+        result = "'"
+
+        for ch in value:
+            if (ch == "'"):
+                result += "\\'"
+            elif (ch == "\n"):
+                result += "\\n"
+            elif (ch == "\r"):
+                result += "\\r"
+            elif (ch == "\t"):
+                result += "\\t"
+            elif (ch == "\b"):
+                result += "\\b"
+            elif (ch == "\\"):
+                result += "\\\\"
+            else:
+                result += ch
+
+        result += "'"
+        return result
+
 
 class NodeApp:
 

tests/test_simple.py

@@ -1062,13 +1062,35 @@ def test_simple_with_bin_dir(self):
             pass  # Expected error
 
     def test_set_auto_conf(self):
+        # elements contain [property id, value, storage value]
+        testData = [
+            ["archive_command",
+             "cp '%p' \"/mnt/server/archivedir/%f\"",
+             "'cp \\'%p\\' \"/mnt/server/archivedir/%f\""],
+            ["restore_command",
+             'cp "/mnt/server/archivedir/%f" \'%p\'',
+             "'cp \"/mnt/server/archivedir/%f\" \\'%p\\''"],
+            ["log_line_prefix",
+             "'\n\r\t\b\\\"",
+             "'\\\'\\n\\r\\t\\b\\\\\""],
+            ["log_connections",
+             True,
+             "on"],
+            ["log_disconnections",
+             False,
+             "off"],
+            ["autovacuum_max_workers",
+             3,
+             "3"]
+        ]
+
         with get_new_node() as node:
             node.init().start()
 
-            options = {
-                "archive_command": "cp '%p' \"/mnt/server/archivedir/%f\"",
-                'restore_command': 'cp "/mnt/server/archivedir/%f" \'%p\'',
-            }
+            options = {}
+
+            for x in testData:
+                options[x[0]] = x[1]
 
             node.set_auto_conf(options)
             node.stop()
@@ -1077,16 +1099,13 @@ def test_set_auto_conf(self):
             auto_conf_path = f"{node.data_dir}/postgresql.auto.conf"
             with open(auto_conf_path, "r") as f:
                 content = f.read()
-                self.assertIn(
-                    "archive_command = 'cp \\'%p\\' \"/mnt/server/archivedir/%f\"",
-                    content,
-                    "archive_command stored wrong"
-                )
-                self.assertIn(
-                    "restore_command = 'cp \"/mnt/server/archivedir/%f\" \\'%p\\''",
-                    content,
-                    "restore_command stored wrong"
-                )
+
+                for x in testData:
+                    self.assertIn(
+                        x[0] + " = " + x[2],
+                        content,
+                        x[0] + " stored wrong"
+                    )
 
 
 if __name__ == '__main__':