oeqa/sdk/maturin: no need for a setupClass, merge code into test

There's no need to copy files inside setUpClass() when there's only one
test function that uses it. Just do all of the test inside the test.

(From OE-Core rev: 5474677b21f2f4069f355abdc600483c42d0b0b3)

Signed-off-by: Ross Burton <ross.burton@arm.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/sdk/cases/maturin.py

@@ -30,17 +30,6 @@ class MaturinTest(OESDKTestCase):
         self.assertIn(expected, output)
 
 class MaturinDevelopTest(OESDKTestCase):
-    @classmethod
-    def setUpClass(self):
-        targetdir = os.path.join(self.tc.sdk_dir, "guessing-game")
-        try:
-            shutil.rmtree(targetdir)
-        except FileNotFoundError:
-            pass
-        shutil.copytree(
-            os.path.join(self.tc.files_dir, "maturin/guessing-game"), targetdir
-        )
-
     def setUp(self):
         machine = self.td.get("MACHINE")
         self.ensure_host_package("python3-maturin")
@@ -58,9 +47,17 @@ class MaturinDevelopTest(OESDKTestCase):
           (1) that a .venv can been created.
           (2) a functional 'rustc' and 'cargo'
         """
-        self._run("cd %s/guessing-game; python3 -m venv .venv" % self.tc.sdk_dir)
-        cmd = "cd %s/guessing-game; maturin develop" % self.tc.sdk_dir
-        output = self._run(cmd)
+        targetdir = os.path.join(self.tc.sdk_dir, "guessing-game")
+        try:
+            shutil.rmtree(targetdir)
+        except FileNotFoundError:
+            pass
+        shutil.copytree(
+            os.path.join(self.tc.files_dir, "maturin/guessing-game"), targetdir
+        )
+
+        self._run("cd %s; python3 -m venv .venv" % targetdir)
+        output = self._run("cd %s; maturin develop" % targetdir)
         self.assertRegex(output, r"🔗 Found pyo3 bindings with abi3 support for Python ≥ 3.8")
         self.assertRegex(output, r"🐍 Not using a specific python interpreter")
         self.assertRegex(output, r"📡 Using build options features from pyproject.toml")