Add test guards

Author: jacobbohlin

tests/python/contrib/test_ethosu/cascader/test_ethosu_binary_elementwise_matcher.py

@@ -14,17 +14,20 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+import pytest
+
+pytest.importorskip("ethosu.vela")
+
+import numpy as np
+import math
+
 from tvm import te
 import tvm.contrib.ethosu.cascader as cs
 from tvm.relay.backend.contrib.ethosu.te.binary_elementwise import (
     match_ethosu_binary_elementwise,
     binary_elementwise_compute,
 )
 
-import numpy as np
-import math
-import pytest
-
 
 def _make_matrices(broadcast, ifm_layout, ifm2_layout, ofm_layout):
     broadcast_h, broadcast_w, broadcast_c = broadcast

tests/python/contrib/test_ethosu/cascader/test_ethosu_conv2d_matcher.py

@@ -24,8 +24,6 @@
 
 from .infra import make_matrices
 
-import pytest
-
 
 @pytest.mark.parametrize("kernel", [(3, 3), (2, 1), (3, 5)])
 @pytest.mark.parametrize("stride", [(1, 1), (2, 1), (3, 2)])

tests/python/contrib/test_ethosu/cascader/test_ethosu_depthwise2d_matcher.py

@@ -14,6 +14,12 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+import pytest
+
+pytest.importorskip("ethosu.vela")
+
+import numpy as np
+
 from tvm import te
 import tvm.contrib.ethosu.cascader as cs
 from tvm.relay.backend.contrib.ethosu.te.depthwise import (
@@ -22,9 +28,6 @@
 )
 from .infra import make_matrices
 
-import numpy as np
-import pytest
-
 
 @pytest.mark.parametrize("kernel", [(3, 3), (2, 1), (3, 5)])
 @pytest.mark.parametrize("stride", [(1, 1), (2, 1), (3, 2)])

tests/python/contrib/test_ethosu/cascader/test_ethosu_pooling_matcher.py

@@ -14,14 +14,17 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+import pytest
+
+pytest.importorskip("ethosu.vela")
+
+import numpy as np
+
 from tvm import te
 import tvm.contrib.ethosu.cascader as cs
 from tvm.relay.backend.contrib.ethosu.te.pooling import match_ethosu_pooling, pooling_compute
 from .infra import make_matrices
 
-import numpy as np
-import pytest
-
 
 @pytest.mark.parametrize("pool_shape", [(3, 3), (2, 1), (3, 5)])
 @pytest.mark.parametrize("stride", [(1, 1), (2, 1), (3, 2)])

tests/python/contrib/test_ethosu/cascader/test_ethosu_unary_elementwise_matcher.py

@@ -14,17 +14,20 @@
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
+import pytest
+
+pytest.importorskip("ethosu.vela")
+
+import numpy as np
+import math
+
 from tvm import te
 import tvm.contrib.ethosu.cascader as cs
 from tvm.relay.backend.contrib.ethosu.te.unary_elementwise import (
     match_ethosu_unary_elementwise,
     unary_elementwise_compute,
 )
 
-import numpy as np
-import math
-import pytest
-
 
 def _make_matrices(ifm_layout, ofm_layout):
     nhwc_to_nhcwb16 = [