Alembic: fix unit test on Windows

There are two issues solved in this commit:

- Our Windows buildbot has slightly different floating point errors than
  the Linux one, which meant a larger delta was required for float
  comparisons.
- The test performs an export to a temporary Alembic file and
  subsequently imports it. Deleting the temporary file was impossible on
  Windows because it was still in use. This is now resolved by first
  loading the default blend file before deleting the Alembic file.

1 files changed, 17 insertions, 9 deletions

diff --git a/tests/python/bl_alembic_io_test.py b/tests/python/bl_alembic_io_test.py
index 0f74b773c32..2786a2db4d7 100644
--- a/tests/python/bl_alembic_io_test.py
+++ b/tests/python/bl_alembic_io_test.py
@@ -269,6 +269,10 @@ class CameraExportImportTest(unittest.TestCase):
         self.tempdir = pathlib.Path(self._tempdir.name)
 
     def tearDown(self):
+        # Unload the current blend file to release the imported Alembic file.
+        # This is necessary on Windows in order to be able to delete the
+        # temporary ABC file.
+        bpy.ops.wm.read_homefile()
         self._tempdir.cleanup()
 
     def test_export_hierarchy(self):
@@ -336,18 +340,22 @@ class CameraExportImportTest(unittest.TestCase):
         actual_rot = ob_eval.matrix_world.to_euler('XYZ')
         actual_scale = ob_eval.matrix_world.to_scale()
 
-        self.assertAlmostEqual(expect_loc[0], actual_loc.x, delta=1e-5)
-        self.assertAlmostEqual(expect_loc[1], actual_loc.y, delta=1e-5)
-        self.assertAlmostEqual(expect_loc[2], actual_loc.z, delta=1e-5)
+        # Precision of the 'almost equal' comparisons.
+        delta_loc = delta_scale = 1e-6
+        delta_rot = math.degrees(1e-6)
 
-        self.assertAlmostEqual(expect_rot_deg[0], math.degrees(actual_rot.x), delta=1e-5)
-        self.assertAlmostEqual(expect_rot_deg[1], math.degrees(actual_rot.y), delta=1e-5)
-        self.assertAlmostEqual(expect_rot_deg[2], math.degrees(actual_rot.z), delta=1e-5)
+        self.assertAlmostEqual(expect_loc[0], actual_loc.x, delta=delta_loc)
+        self.assertAlmostEqual(expect_loc[1], actual_loc.y, delta=delta_loc)
+        self.assertAlmostEqual(expect_loc[2], actual_loc.z, delta=delta_loc)
+
+        self.assertAlmostEqual(expect_rot_deg[0], math.degrees(actual_rot.x), delta=delta_rot)
+        self.assertAlmostEqual(expect_rot_deg[1], math.degrees(actual_rot.y), delta=delta_rot)
+        self.assertAlmostEqual(expect_rot_deg[2], math.degrees(actual_rot.z), delta=delta_rot)
 
         # This test doesn't use scale.
-        self.assertAlmostEqual(1, actual_scale.x, delta=1e-5)
-        self.assertAlmostEqual(1, actual_scale.y, delta=1e-5)
-        self.assertAlmostEqual(1, actual_scale.z, delta=1e-5)
+        self.assertAlmostEqual(1, actual_scale.x, delta=delta_scale)
+        self.assertAlmostEqual(1, actual_scale.y, delta=delta_scale)
+        self.assertAlmostEqual(1, actual_scale.z, delta=delta_scale)
 
 
 def main():