Exceptions should inherit from Terra where suitable (#741)

* Changed inheritance of exception classes

* Changed error type

qiskit_ibm_provider/qpy/exceptions.py

@@ -12,10 +12,11 @@
 
 """Exception for errors raised by the pulse module."""
 from typing import Any
-from qiskit.exceptions import QiskitError
+from qiskit.qpy.exceptions import QpyError
+from ..exceptions import IBMError
 
 
-class QpyError(QiskitError):
+class IBMQpyError(QpyError, IBMError):
     """Errors raised by the qpy module."""
 
     def __init__(self, *message: Any):

qiskit_ibm_provider/visualization/exceptions.py

@@ -12,13 +12,7 @@
 
 """Exceptions related to the visualization modules."""
 
-from ..exceptions import IBMError
-
-
-class VisualizationError(IBMError):
-    """Base class for errors raised by the visualization modules."""
-
-    pass
+from qiskit.visualization.exceptions import VisualizationError
 
 
 class VisualizationValueError(VisualizationError, ValueError):

test/unit/mock/fake_account_client.py

@@ -16,6 +16,7 @@
 from typing import List, Dict, Any, Optional
 
 from qiskit.providers.fake_provider.backends.lima.fake_lima import FakeLima
+from qiskit.providers.exceptions import QiskitBackendNotFoundError
 
 
 class FakeApiBackend:
@@ -81,7 +82,7 @@ def backend_status(self, backend_name: str) -> Dict[str, Any]:
         for back in self._backends:
             if back.name == backend_name:
                 return back.status.copy()
-        raise ValueError(f"Backend {backend_name} not found")
+        raise QiskitBackendNotFoundError(f"Backend {backend_name} not found")
 
     def backend_properties(
         self, backend_name: str, datetime: Optional[python_datetime] = None
@@ -91,14 +92,14 @@ def backend_properties(
         for back in self._backends:
             if back.name == backend_name:
                 return back.properties.copy()
-        raise ValueError(f"Backend {backend_name} not found")
+        raise QiskitBackendNotFoundError(f"Backend {backend_name} not found")
 
     def backend_pulse_defaults(self, backend_name: str) -> Dict:
         """Return the pulse defaults of the backend."""
         for back in self._backends:
             if back.name == backend_name:
                 return back.defaults.copy()
-        raise ValueError(f"Backend {backend_name} not found")
+        raise QiskitBackendNotFoundError(f"Backend {backend_name} not found")
 
     # Test-only methods.