RemoteOperations::path_exists is updated (#206)

- command is passed through list
- we process all the result codes of test

Author: dmitry-lipetsk

testgres/operations/remote_ops.py

@@ -247,8 +247,30 @@ def listdir(self, path):
         return result.splitlines()
 
     def path_exists(self, path):
-        result = self.exec_command("test -e {}; echo $?".format(path), encoding=get_default_encoding())
-        return int(result.strip()) == 0
+        command = ["test", "-e", path]
+
+        exit_status, output, error = self.exec_command(cmd=command, encoding=get_default_encoding(), ignore_errors=True, verbose=True)
+
+        assert type(output) == str  # noqa: E721
+        assert type(error) == str  # noqa: E721
+
+        if exit_status == 0:
+            return True
+
+        if exit_status == 1:
+            return False
+
+        errMsg = "Test operation returns an unknown result code: {0}. Path is [{1}].".format(
+            exit_status,
+            path)
+
+        RaiseError.CommandExecutionError(
+            cmd=command,
+            exit_code=exit_status,
+            msg_arg=errMsg,
+            error=error,
+            out=output
+        )
 
     @property
     def pathsep(self):

tests/test_remote.py

@@ -130,23 +130,29 @@ def test_listdir(self):
 
         assert isinstance(files, list)
 
-    def test_path_exists_true(self):
+    def test_path_exists_true__directory(self):
         """
-        Test path_exists for an existing path.
+        Test path_exists for an existing directory.
         """
-        path = "/etc"
-        response = self.operations.path_exists(path)
+        assert self.operations.path_exists("/etc") is True
 
-        assert response is True
+    def test_path_exists_true__file(self):
+        """
+        Test path_exists for an existing file.
+        """
+        assert self.operations.path_exists(__file__) is True
 
-    def test_path_exists_false(self):
+    def test_path_exists_false__directory(self):
         """
-        Test path_exists for a non-existing path.
+        Test path_exists for a non-existing directory.
         """
-        path = "/nonexistent_path"
-        response = self.operations.path_exists(path)
+        assert self.operations.path_exists("/nonexistent_path") is False
 
-        assert response is False
+    def test_path_exists_false__file(self):
+        """
+        Test path_exists for a non-existing file.
+        """
+        assert self.operations.path_exists("/etc/nonexistent_path.txt") is False
 
     def test_write_text_file(self):
         """