xunit: Create the xfstestsdb xunit delete command

This command is used to delete individual xunit entries attached to a
specific xfstests run.

Implements: #5 (`xfstestsdb xunit delete`)
Signed-off-by: Anna Schumaker <anna@nowheycreamery.com>

tests/xunit/test_delete.py

@@ -0,0 +1,60 @@
+# Copyright 2023 (c) Anna Schumaker.
+"""Tests the `xfstestsdb xunit delete` command."""
+import errno
+import io
+import unittest
+import unittest.mock
+import xfstestsdb.delete
+import tests.xunit
+
+
+class TestXunitDelete(unittest.TestCase):
+    """Tests the `xfstestsdb xunit delete` command."""
+
+    def setUp(self):
+        """Set up common variables."""
+        self.xfstestsdb = xfstestsdb.Command()
+        self.xunit = self.xfstestsdb.commands["xunit"]
+        self.delete = self.xunit.commands["delete"]
+
+    def test_init(self):
+        """Check that the xunit delete command was set up properly."""
+        self.assertIsInstance(self.delete, xfstestsdb.commands.Command)
+        self.assertIsInstance(self.delete, xfstestsdb.xunit.delete.Command)
+        self.assertEqual(self.xunit.subparser.choices["delete"],
+                         self.delete.parser)
+
+    @unittest.mock.patch("sys.stdout", new_callable=io.StringIO)
+    def test_delete(self, mock_stdout: io.StringIO):
+        """Test the `xfstestsdb xunit delete` command with valid input."""
+        self.xfstestsdb.run(["new", "/dev/test"])
+        self.xfstestsdb.run(["xunit", "read", "1", str(tests.xunit.XUNIT_1)])
+        self.xfstestsdb.run(["xunit", "delete", "1", tests.xunit.XUNIT_1.stem])
+        self.assertRegex(mock_stdout.getvalue(),
+                         "run #1 xunit 'test-1' has been deleted")
+
+        cur = self.xfstestsdb.sql("SELECT COUNT(*) FROM xunits")
+        self.assertEqual(cur.fetchone()["COUNT(*)"], 0)
+
+    @unittest.mock.patch("sys.stderr", new_callable=io.StringIO)
+    def test_delete_error(self, mock_stderr: io.StringIO):
+        """Test the `xfstestsdb xunit delete` command with invalid input."""
+        with self.assertRaises(SystemExit):
+            self.xfstestsdb.run(["xunit", "delete"])
+        self.assertRegex(mock_stderr.getvalue(),
+                         "error: the following arguments are required: runid")
+
+        with self.assertRaises(SystemExit):
+            self.xfstestsdb.run(["xunit", "delete", "1"])
+        self.assertRegex(mock_stderr.getvalue(),
+                         "error: the following arguments are required: name")
+
+    @unittest.mock.patch("sys.stderr", new_callable=io.StringIO)
+    def test_delete_enoent(self, mock_stderr: io.StringIO):
+        """Test the `xfstestsdb delete` command with an invalid runid."""
+        with self.assertRaises(SystemExit) as sys_exit:
+            self.xfstestsdb.run(["xunit", "delete", "2", "test-1"])
+
+        self.assertEqual(sys_exit.exception.code, errno.ENOENT)
+        self.assertRegex(mock_stderr.getvalue(),
+                         "error: either run #2 or xunit 'test-1' do not exist")

xfstestsdb/xunit/__init__.py

@@ -3,6 +3,7 @@
 import argparse
 from .. import commands
 from .. import sqlite
+from . import delete
 from . import read
 from . import rename
 
@@ -16,7 +17,8 @@ class Command(commands.Command):
         super().__init__(subparser, sql, "xunit",
                          help="xfstestsdb xunit commands")
         self.subparser = self.parser.add_subparsers(title="xunit commands")
-        self.commands = {"read": read.Command(self.subparser, sql),
+        self.commands = {"delete": delete.Command(self.subparser, sql),
+                         "read": read.Command(self.subparser, sql),
                          "rename": rename.Command(self.subparser, sql)}
 
     def do_command(self, args: argparse.Namespace) -> None:

xfstestsdb/xunit/delete.py

@@ -0,0 +1,32 @@
+# Copyright 2023 (c) Anna Schumaker.
+"""The `xfstestsdb xunit delete` command."""
+import argparse
+import errno
+import sys
+from . import commands
+from . import sqlite
+
+
+class Command(commands.Command):
+    """The `xfstestsdb delete` command."""
+
+    def __init__(self, subparser: argparse.Action,
+                 sql: sqlite.Connection) -> None:
+        """Set up the delete command."""
+        super().__init__(subparser, sql, "delete",
+                         help="delete an xfstests xunit entry")
+        self.parser.add_argument("runid", metavar="runid", nargs=1, type=int,
+                                 help="runid of the xfstests xunit to delete")
+        self.parser.add_argument("name", metavar="name", nargs=1, type=str,
+                                 help="name of the xunit entry to delete")
+
+    def do_command(self, args: argparse.Namespace) -> None:
+        """Delete a row from the xunits table."""
+        cur = self.sql("DELETE FROM xunits WHERE rowid=? and name=?",
+                       args.runid[0], args.name[0])
+        if cur.rowcount == 0:
+            print(f"error: either run #{args.runid[0]} or "
+                  f"xunit '{args.name[0]}' do not exist", file=sys.stderr)
+            sys.exit(errno.ENOENT)
+
+        print(f"run #{args.runid[0]} xunit '{args.name[0]}' has been deleted")