Add unit test

docs/installing.rst

@@ -37,4 +37,12 @@ Developement  installation
     # this is needed to register git filters
     git config --local include.path ../.gitconfig
     pip install -e .
-    pip install -r requirements.txt
+    pip install -r requirements.txt
+
+Pytest configuration
+....................
+
+Pytest uses a default configuration file (`config.yml`) in which we can found products paths to test.
+This configuration can be superseded by adding a local config file on the home directory :
+(`~/xarray-safe-s1/localconfig.yml`).
+In this file, testing files can be listed in the var `product_paths`.

safe_s1/config.yml

@@ -0,0 +1,3 @@
+# default data paths for tests
+product_paths:
+  - 'S1A_IW_GRDH_1SDV_20170907T103020_20170907T103045_018268_01EB76_Z010.SAFE'

test/test_s1reader.py

@@ -0,0 +1,48 @@
+import safe_s1
+from safe_s1 import sentinel1_xml_mappings, Sentinel1Reader
+import os
+import logging
+from pathlib import Path
+import yaml
+
+logging.basicConfig()
+logging.captureWarnings(True)
+
+logger = logging.getLogger('s1_reader_test')
+logger.setLevel(logging.DEBUG)
+
+
+# determine the config file we will use (config.yml by default, and a local config if one is present) and retrieve
+# the products names
+local_config_pontential_path = Path(os.path.join('~', 'xarray-safe-s1', 'localconfig.yml')).expanduser()
+if local_config_pontential_path.exists():
+    config_path = local_config_pontential_path
+    with open(config_path) as config_content:
+        products = yaml.load(config_content, Loader=yaml.SafeLoader)['product_paths']
+else:
+    config_path = Path(os.path.join(os.path.dirname(safe_s1.__file__), 'config.yml'))
+    with open(config_path) as config_content:
+        raw_products = yaml.load(config_content, Loader=yaml.SafeLoader)['product_paths']
+    products = [sentinel1_xml_mappings.get_test_file(filename) for filename in raw_products]
+
+
+# Try to apply the reader on different products
+def test_reader():
+    try:
+        for product in products:
+            reader = Sentinel1Reader(product)
+            # When a product is a multidataset, datatree is none, so we want to be sure that the datatree isn't empty
+            # (selecting a dataset)
+            sub_reader = Sentinel1Reader(reader.datasets_names[0])
+            dt = sub_reader.datatree
+            for ds in dt:
+                dt[ds].to_dataset().compute()
+        assert True
+    except:
+        assert False
+
+
+
+
+
+