better crx2rnx detect

georinex/io.py

@@ -60,6 +60,7 @@ def _opencrx(f: TextIO) -> str:
     exe = './crx2rnx'
     if os.name == 'nt':
         exe = exe[2:]
+
     try:
         In = f.read()
         ret = subprocess.check_output([exe, '-'], input=In,

tests/test_hatanaka.py

@@ -4,11 +4,16 @@
 from pathlib import Path
 import georinex as gr
 from datetime import datetime
+import os
+
 R = Path(__file__).parent
 Rexe = Path(__file__).resolve().parents[1] / 'rnxcmp'
+exe = './crx2rnx'
+if os.name == 'nt':
+   exe = exe[:2]
 
 try:  # capture_output is py >= 3.7
-    ret = subprocess.run(['crx2rnx', '-h'], stderr=subprocess.PIPE,
+    ret = subprocess.run([exe, '-h'], stderr=subprocess.PIPE,
                          universal_newlines=True, cwd=Rexe)  # -h returncode == 1
     nocrx = False if ret.stderr.startswith('Usage') else True
 except (FileNotFoundError, PermissionError) as e:

tests/test_nav2.py

@@ -10,13 +10,17 @@
 
 
 def test_time():
+    pytest.importorskip('unlzw')
+
     times = gr.gettime(R/'ab422100.18n.Z').values.astype('datetime64[us]').astype(datetime)
 
     assert times[0] == datetime(2018, 7, 29, 1, 59, 44)
     assert times[-1] == datetime(2018, 7, 30)
 
 
 def test_data():
+    pytest.importorskip('unlzw')
+
     nav = gr.load(R/'ab422100.18n.Z')
 
     nav0 = nav.sel(time='2018-07-29T03:59:44').dropna(dim='sv', how='all')
@@ -43,6 +47,8 @@ def test_mangled():
 
 
 def test_tlim():
+    pytest.importorskip('unlzw')
+
     nav = gr.load(R/'ceda2100.18e.Z', tlim=('2018-07-29T11', '2018-07-29T12'))
 
     times = nav.time.values.astype('datetime64[us]').astype(datetime)
@@ -57,6 +63,8 @@ def test_tlim():
 
 
 def test_galileo():
+    pytest.importorskip('unlzw')
+
     nav = gr.load(R/'ceda2100.18e.Z')
 
     E18 = nav.sel(sv='E18').dropna(dim='time', how='all')
@@ -72,6 +80,8 @@ def test_galileo():
 
 
 def test_gps():
+    pytest.importorskip('unlzw')
+
     nav = gr.load(R/'brdc2800.15n.Z')
 
     times = nav.time.values.astype('datetime64[us]').astype(datetime).tolist()