Test on s390x. (#7038)

* Fix && remove unused parameter.

tests/cpp/data/test_array_interface.cc

@@ -42,23 +42,19 @@ TEST(ArrayInterface, Error) {
   std::string typestr{"<f4"};
 
   // missing version
-  EXPECT_THROW(ArrayInterfaceHandler::ExtractData(column_obj,
-                                                  StringView{typestr}, shape),
+  EXPECT_THROW(ArrayInterfaceHandler::ExtractData(column_obj, shape),
                dmlc::Error);
   column["version"] = Integer(static_cast<Integer::Int>(1));
   // missing data
-  EXPECT_THROW(ArrayInterfaceHandler::ExtractData(column_obj,
-                                                  StringView{typestr}, shape),
+  EXPECT_THROW(ArrayInterfaceHandler::ExtractData(column_obj, shape),
                dmlc::Error);
   column["data"] = j_data;
   // missing typestr
-  EXPECT_THROW(ArrayInterfaceHandler::ExtractData(column_obj,
-                                                  StringView{typestr}, shape),
+  EXPECT_THROW(ArrayInterfaceHandler::ExtractData(column_obj, shape),
                dmlc::Error);
   column["typestr"] = String("<f4");
   // nullptr is not valid
-  EXPECT_THROW(ArrayInterfaceHandler::ExtractData(column_obj,
-                                                  StringView{typestr}, shape),
+  EXPECT_THROW(ArrayInterfaceHandler::ExtractData(column_obj, shape),
                dmlc::Error);
 
   HostDeviceVector<float> storage;
@@ -67,8 +63,7 @@ TEST(ArrayInterface, Error) {
       Json(Integer(reinterpret_cast<Integer::Int>(storage.ConstHostPointer()))),
       Json(Boolean(false))};
   column["data"] = j_data;
-  EXPECT_NO_THROW(ArrayInterfaceHandler::ExtractData(
-      column_obj, StringView{typestr}, shape));
+  EXPECT_NO_THROW(ArrayInterfaceHandler::ExtractData(column_obj, shape));
 }
 
 TEST(ArrayInterface, GetElement) {

tests/python/test_basic.py

@@ -232,6 +232,7 @@ class TestBasic:
         assert isinstance(cv, dict)
         assert len(cv) == (4)
 
+    @pytest.mark.skipif(**tm.skip_s390x())
     def test_cv_explicit_fold_indices_labels(self):
         params = {'max_depth': 2, 'eta': 1, 'verbosity': 0, 'objective':
                   'reg:squarederror'}

tests/python/testing.py

@@ -11,6 +11,7 @@ import pytest
 import tempfile
 import xgboost as xgb
 import numpy as np
+import platform
 
 hypothesis = pytest.importorskip('hypothesis')
 sklearn = pytest.importorskip('sklearn')
@@ -136,6 +137,12 @@ def no_multiple(*args):
     return {'condition': condition, 'reason': reason}
 
 
+def skip_s390x():
+    condition = platform.machine() == "s390x"
+    reason = "Known to fail on s390x"
+    return {"condition": condition, "reason": reason}
+
+
 # Contains a dataset in numpy format as well as the relevant objective and metric
 class TestDataset:
     def __init__(self, name, get_dataset, objective, metric

tests/travis/run_test.sh

@@ -103,5 +103,5 @@ if [ ${TASK} == "s390x_test" ]; then
     # Run model compatibility tests
     cd ..
     python3 -m pip install --user pytest hypothesis
-    PYTHONPATH=./python-package python3 -m pytest --fulltrace -v -rxXs tests/python/ -k 'test_model'
+    PYTHONPATH=./python-package python3 -m pytest --fulltrace -v -rxXs tests/python/test_basic.py
 fi