Test to make sure transpose is right

Author: dcherian

xarray/tests/test_plot.py

@@ -2162,3 +2162,9 @@ def test_plot_transposed_nondim_coord(plotfunc):
     )
     getattr(da.plot, plotfunc)(x="x", y="zt")
     getattr(da.plot, plotfunc)(x="zt", y="x")
+
+
+def test_plot_transposes_properly():
+    da = xr.DataArray([np.sin(2 * np.pi / 10 * np.arange(10))] * 10, dims=("y", "x"))
+    hdl = da.plot(x="x", y="y")
+    np.all(hdl.get_array() == da.to_masked_array().ravel())