diff options
Diffstat (limited to 'numpy/linalg/tests/test_linalg.py')
| -rw-r--r-- | numpy/linalg/tests/test_linalg.py | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/numpy/linalg/tests/test_linalg.py b/numpy/linalg/tests/test_linalg.py index 87dfe988a..1c24f1e04 100644 --- a/numpy/linalg/tests/test_linalg.py +++ b/numpy/linalg/tests/test_linalg.py @@ -644,10 +644,6 @@ class TestEig(EigCases): class SVDCases(LinalgSquareTestCase, LinalgGeneralizedSquareTestCase): def do(self, a, b, tags): - if 'size-0' in tags: - assert_raises(LinAlgError, linalg.svd, a, 0) - return - u, s, vt = linalg.svd(a, 0) assert_allclose(a, dot_generalized(np.asarray(u) * np.asarray(s)[..., None, :], np.asarray(vt)), @@ -670,15 +666,19 @@ class TestSVD(SVDCases): for dtype in [single, double, csingle, cdouble]: check(dtype) - def test_0_size(self): - # These raise errors currently - # (which does not mean that it may not make sense) - a = np.zeros((0, 0), dtype=np.complex64) - assert_raises(linalg.LinAlgError, linalg.svd, a) - a = np.zeros((0, 1), dtype=np.complex64) - assert_raises(linalg.LinAlgError, linalg.svd, a) - a = np.zeros((1, 0), dtype=np.complex64) - assert_raises(linalg.LinAlgError, linalg.svd, a) + def test_empty_identity(self): + """ Empty input should put an identity matrix in u or vh """ + x = np.empty((4, 0)) + u, s, vh = linalg.svd(x, compute_uv=True) + assert_equal(u.shape, (4, 4)) + assert_equal(vh.shape, (0, 0)) + assert_equal(u, np.eye(4)) + + x = np.empty((0, 4)) + u, s, vh = linalg.svd(x, compute_uv=True) + assert_equal(u.shape, (0, 0)) + assert_equal(vh.shape, (4, 4)) + assert_equal(vh, np.eye(4)) class CondCases(LinalgSquareTestCase, LinalgGeneralizedSquareTestCase): |