def _test_ctx(self, ctx):
ureg = UnitRegistry()
q = 500 * ureg.meter
s = (ureg.speed_of_light / q).to("Hz")
nctx = len(ureg._contexts)
self.assertNotIn(ctx.name, ureg._contexts)
ureg.add_context(ctx)
self.assertIn(ctx.name, ureg._contexts)
self.assertEqual(len(ureg._contexts), nctx + 1 + len(ctx.aliases))
with ureg.context(ctx.name):
self.assertEqual(q.to("Hz"), s)
self.assertEqual(s.to("meter"), q)
ureg.remove_context(ctx.name)
self.assertNotIn(ctx.name, ureg._contexts)
self.assertEqual(len(ureg._contexts), nctx)
def _test_ctx(self, ctx):
ureg = UnitRegistry()
q = 500 * ureg.meter
s = (ureg.speed_of_light / q).to('Hz')
nctx = len(ureg._contexts)
self.assertNotIn(ctx.name, ureg._contexts)
ureg.add_context(ctx)
self.assertIn(ctx.name, ureg._contexts)
self.assertEqual(len(ureg._contexts), nctx + 1 + len(ctx.aliases))
with ureg.context(ctx.name):
self.assertEqual(q.to('Hz'), s)
self.assertEqual(s.to('meter'), q)
ureg.remove_context(ctx.name)
self.assertNotIn(ctx.name, ureg._contexts)
self.assertEqual(len(ureg._contexts), nctx)
def _test_ctx(self, ctx):
ureg = UnitRegistry()
q = 500 * ureg.meter
s = (ureg.speed_of_light / q).to("Hz")
nctx = len(ureg._contexts)
assert ctx.name not in ureg._contexts
ureg.add_context(ctx)
assert ctx.name in ureg._contexts
assert len(ureg._contexts) == nctx + 1 + len(ctx.aliases)
with ureg.context(ctx.name):
assert q.to("Hz") == s
assert s.to("meter") == q
ureg.remove_context(ctx.name)
assert ctx.name not in ureg._contexts
assert len(ureg._contexts) == nctx
