*_test: pytest.raises(string) is deprecated

	.../pygolang/golang/strconv_test.py:75: PytestDeprecationWarning: raises(..., 'code(as_a_string)') is deprecated, use the context manager form or use `exec()` directly
	...

See https://docs.pytest.org/en/latest/deprecations.html#raises-warns-with-a-string-as-the-second-argument

golang/golang_test.py

 # -*- coding: utf-8 -*-
-# Copyright (C) 2018  Nexedi SA and Contributors.
+# Copyright (C) 2018-2019  Nexedi SA and Contributors.
 #                          Kirill Smelkov <kirr@nexedi.com>
 #
 # This program is free software: you can Use, Study, Modify and Redistribute
@@ -57,8 +57,8 @@ def test_chan():
     assert ch.recv()    == None
     assert ch.recv_()   == (None, False)
     assert ch.recv_()   == (None, False)
-    raises(_PanicError, "ch.send(0)")
-    raises(_PanicError, "ch.close()")
+    with raises(_PanicError): ch.send(0)
+    with raises(_PanicError): ch.close()
 
     # sync: send vs recv
     ch = chan()
@@ -78,7 +78,7 @@ def test_chan():
         tdelay()
         ch.close()
     go(_)
-    raises(_PanicError, "ch.send(0)")
+    with raises(_PanicError): ch.send(0)
 
     # close vs recv
     ch = chan()
@@ -450,7 +450,7 @@ def test_deferrecover():
         defer(_)
         1/0
 
-    raises(ZeroDivisionError, "_()")
+    with raises(ZeroDivisionError): _()
     assert v == ['ran ok', 2, 1]
 
     # defer without @func is caught and properly reported
@@ -472,7 +472,7 @@ def test_deferrecover():
         defer(lambda: panic(3))
         defer(lambda: v.append(4))
 
-    raises(_PanicError, "_()")
+    with raises(_PanicError): _()
     assert v == [4, 2, 1]
 
 
@@ -509,7 +509,7 @@ def test_deferrecover():
 
         panic("bbb")
 
-    raises(_PanicError, "_()")
+    with raises(_PanicError): _()
     assert v == [3, 'recovered 1', 1]
 
 
@@ -560,7 +560,7 @@ def test_deferrecover():
 
         panic("zzz")
 
-    raises(_PanicError, "_()")
+    with raises(_PanicError): _()
     assert v == ['not recovered']
 
 

golang/strconv_test.py

 # -*- coding: utf-8 -*-
-# Copyright (C) 2018  Nexedi SA and Contributors.
+# Copyright (C) 2018-2019  Nexedi SA and Contributors.
 #                          Kirill Smelkov <kirr@nexedi.com>
 #
 # This program is free software: you can Use, Study, Modify and Redistribute
@@ -72,7 +72,7 @@ def test_quote():
         assert unquote(tquoted) == tin
         assert unquote_next(tquoted) == (tin, type(tin)())
         assert unquote_next(tquoted + tail) == (tin, tail)
-        raises(ValueError, 'unquote(tquoted + tail)')
+        with raises(ValueError): unquote(tquoted + tail)
 
         # qq always gives str
         assert qq(tin) == asstr(tquoted)
@@ -96,7 +96,7 @@ def test_quote():
         assert unquote(tquoted) == tin
         assert unquote_next(tquoted) == (tin, type(tin)())
         assert unquote_next(tquoted + tail) == (tin, tail)
-        raises(ValueError, 'unquote(tquoted + tail)')
+        with raises(ValueError): unquote(tquoted + tail)
 
         # qq always gives str
         assert qq(tin) == asstr(tquoted)