Change test_grdvolume.py to use static_earth_relief

pygmt/tests/test_grdvolume.py

@@ -8,17 +8,25 @@
 import pandas as pd
 import pytest
 from pygmt import grdvolume
-from pygmt.datasets import load_earth_relief
 from pygmt.exceptions import GMTInvalidInput
 from pygmt.helpers import GMTTempFile
+from pygmt.helpers.testing import load_static_earth_relief
 
 
 @pytest.fixture(scope="module", name="grid")
 def fixture_grid():
     """
     Load the grid data from the sample earth_relief file.
     """
-    return load_earth_relief(resolution="01d", region=[-100, -95, 34, 39])
+    return load_static_earth_relief()
+
+
+@pytest.fixture(scope="module", name="region")
+def fixture_region():
+    """
+    Set the data region for the tests.
+    """
+    return [-53, -50, -22, -20]
 
 
 @pytest.fixture(scope="module", name="data")
@@ -28,50 +36,25 @@ def fixture_data():
     """
     data = np.array(
         [
-            [
-                2.00000000e02,
-                1.59920815e11,
-                3.16386172e13,
-                1.97839269e02,
-            ],
-            [
-                2.50000000e02,
-                1.44365835e11,
-                2.38676788e13,
-                1.65327751e02,
-            ],
-            [
-                3.00000000e02,
-                1.23788259e11,
-                1.71278707e13,
-                1.38364259e02,
-            ],
-            [
-                3.50000000e02,
-                9.79597525e10,
-                1.15235913e13,
-                1.17635978e02,
-            ],
-            [
-                4.00000000e02,
-                7.26646663e10,
-                7.22303463e12,
-                9.94022955e01,
-            ],
+            [2.00000000e02, 2.30079975e10, 3.92142453e12, 1.70437454e02],
+            [2.50000000e02, 2.30079975e10, 2.77102465e12, 1.20437454e02],
+            [3.00000000e02, 2.30079975e10, 1.62062477e12, 7.04374542e01],
+            [3.50000000e02, 1.76916116e10, 4.53991397e11, 2.56613930e01],
+            [4.00000000e02, 2.81602292e09, 2.34764859e10, 8.33675242e00],
         ]
     )
     return data
 
 
-def test_grdvolume_format(grid):
+def test_grdvolume_format(grid, region):
     """
     Test that correct formats are returned.
     """
-    grdvolume_default = grdvolume(grid=grid)
+    grdvolume_default = grdvolume(grid=grid, region=region)
     assert isinstance(grdvolume_default, pd.DataFrame)
-    grdvolume_array = grdvolume(grid=grid, output_type="numpy")
+    grdvolume_array = grdvolume(grid=grid, output_type="numpy", region=region)
     assert isinstance(grdvolume_array, np.ndarray)
-    grdvolume_df = grdvolume(grid=grid, output_type="pandas")
+    grdvolume_df = grdvolume(grid=grid, output_type="pandas", region=region)
     assert isinstance(grdvolume_df, pd.DataFrame)
 
 
@@ -92,21 +75,27 @@ def test_grdvolume_no_outfile(grid):
         grdvolume(grid=grid, output_type="file")
 
 
-def test_grdvolume_no_outgrid(grid, data):
+def test_grdvolume_no_outgrid(grid, data, region):
     """
     Test the expected output of grdvolume with no output file set.
     """
-    test_output = grdvolume(grid=grid, contour=[200, 400, 50], output_type="numpy")
+    test_output = grdvolume(
+        grid=grid, contour=[200, 400, 50], output_type="numpy", region=region
+    )
     npt.assert_allclose(test_output, data)
 
 
-def test_grdvolume_outgrid(grid):
+def test_grdvolume_outgrid(grid, region):
     """
     Test the expected output of grdvolume with an output file set.
     """
     with GMTTempFile(suffix=".csv") as tmpfile:
         result = grdvolume(
-            grid=grid, contour=[200, 400, 50], output_type="file", outfile=tmpfile.name
+            grid=grid,
+            contour=[200, 400, 50],
+            output_type="file",
+            outfile=tmpfile.name,
+            region=region,
         )
         assert result is None  # return value is None
         assert os.path.exists(path=tmpfile.name)  # check that outfile exists