Misc fixes found by the cupy backend

unumpy/_multimethods.py

@@ -1154,10 +1154,10 @@ def pad(array, pad_width, mode, **kwargs):
     return (array,)
 
 
-@create_numpy(_self_argreplacer)
+@create_numpy(_first2argreplacer)
 @all_of_type(ndarray)
 def searchsorted(a, v, side="left", sorter=None):
-    return (a,)
+    return (a, v)
 
 
 @create_numpy(_first2argreplacer)
@@ -2202,7 +2202,14 @@ def _interp_default(x, xp, fp, left=None, right=None, period=None):
     return result
 
 
-@create_numpy(_self_argreplacer, default=_interp_default)
+def _interp_argreplacer(args, kwargs, dispatchables):
+    def interp(x, xp, fp, left=None, right=None, period=None):
+        return (dispatchables, dict(left=left, right=right, period=period))
+
+    return interp(*args, **kwargs)
+
+
+@create_numpy(_interp_argreplacer, default=_interp_default)
 @all_of_type(ndarray)
 def interp(x, xp, fp, left=None, right=None, period=None):
-    return (x,)
+    return (x, xp, fp)

unumpy/tests/test_numpy.py

@@ -175,7 +175,7 @@ def replace_args_kwargs(method, backend, args, kwargs):
         (np.ediff1d, ([1, 2, 4, 7, 0],), {}),
         (np.cross, ([1, 2, 3], [4, 5, 6]), {}),
         (np.trapz, ([1, 2, 3],), {}),
-        (np.i0, ([0.0, 1.0 + 2j],), {}),
+        (np.i0, ([0.0, 1.0],), {}),
         (np.sinc, ([0, 1, 2],), {}),
         (np.isclose, ([1, 3, 2], [3, 2, 1]), {}),
         (np.allclose, ([1, 3, 2], [3, 2, 1]), {}),