diff options
Diffstat (limited to 'pint/testsuite/test_contexts.py')
| -rw-r--r-- | pint/testsuite/test_contexts.py | 915 |
1 files changed, 479 insertions, 436 deletions
diff --git a/pint/testsuite/test_contexts.py b/pint/testsuite/test_contexts.py index b57a4df..7bdf0ff 100644 --- a/pint/testsuite/test_contexts.py +++ b/pint/testsuite/test_contexts.py @@ -1,7 +1,11 @@ import itertools +import logging import math +import re from collections import defaultdict +import pytest + from pint import ( DefinitionSyntaxError, DimensionalityError, @@ -9,7 +13,7 @@ from pint import ( UnitRegistry, ) from pint.context import Context -from pint.testsuite import QuantityTestCase +from pint.testsuite import helpers from pint.util import UnitsContainer @@ -81,44 +85,44 @@ def add_sharedargdef_ctxs(ureg): ureg.add_context(d) -class TestContexts(QuantityTestCase): - def test_known_context(self): +class TestContexts: + def test_known_context(self, func_registry): ureg = UnitRegistry() add_ctxs(ureg) with ureg.context("lc"): - self.assertTrue(ureg._active_ctx) - self.assertTrue(ureg._active_ctx.graph) + assert ureg._active_ctx + assert ureg._active_ctx.graph - self.assertFalse(ureg._active_ctx) - self.assertFalse(ureg._active_ctx.graph) + assert not ureg._active_ctx + assert not ureg._active_ctx.graph with ureg.context("lc", n=1): - self.assertTrue(ureg._active_ctx) - self.assertTrue(ureg._active_ctx.graph) + assert ureg._active_ctx + assert ureg._active_ctx.graph - self.assertFalse(ureg._active_ctx) - self.assertFalse(ureg._active_ctx.graph) + assert not ureg._active_ctx + assert not ureg._active_ctx.graph - def test_known_context_enable(self): + def test_known_context_enable(self, func_registry): ureg = UnitRegistry() add_ctxs(ureg) ureg.enable_contexts("lc") - self.assertTrue(ureg._active_ctx) - self.assertTrue(ureg._active_ctx.graph) + assert ureg._active_ctx + assert ureg._active_ctx.graph ureg.disable_contexts(1) - self.assertFalse(ureg._active_ctx) - self.assertFalse(ureg._active_ctx.graph) + assert not ureg._active_ctx + assert not ureg._active_ctx.graph ureg.enable_contexts("lc", n=1) - self.assertTrue(ureg._active_ctx) - self.assertTrue(ureg._active_ctx.graph) + assert ureg._active_ctx + assert ureg._active_ctx.graph ureg.disable_contexts(1) - self.assertFalse(ureg._active_ctx) - self.assertFalse(ureg._active_ctx.graph) + assert not ureg._active_ctx + assert not ureg._active_ctx.graph - def test_graph(self): + def test_graph(self, func_registry): ureg = UnitRegistry() add_ctxs(ureg) l = UnitsContainer({"[length]": 1.0}) # noqa: E741 @@ -135,29 +139,29 @@ class TestContexts(QuantityTestCase): g.update({l: {t, c}, t: {l}, c: {l}}) with ureg.context("lc"): - self.assertEqual(ureg._active_ctx.graph, g_sp) + assert ureg._active_ctx.graph == g_sp with ureg.context("lc", n=1): - self.assertEqual(ureg._active_ctx.graph, g_sp) + assert ureg._active_ctx.graph == g_sp with ureg.context("ab"): - self.assertEqual(ureg._active_ctx.graph, g_ab) + assert ureg._active_ctx.graph == g_ab with ureg.context("lc"): with ureg.context("ab"): - self.assertEqual(ureg._active_ctx.graph, g) + assert ureg._active_ctx.graph == g with ureg.context("ab"): with ureg.context("lc"): - self.assertEqual(ureg._active_ctx.graph, g) + assert ureg._active_ctx.graph == g with ureg.context("lc", "ab"): - self.assertEqual(ureg._active_ctx.graph, g) + assert ureg._active_ctx.graph == g with ureg.context("ab", "lc"): - self.assertEqual(ureg._active_ctx.graph, g) + assert ureg._active_ctx.graph == g - def test_graph_enable(self): + def test_graph_enable(self, func_registry): ureg = UnitRegistry() add_ctxs(ureg) l = UnitsContainer({"[length]": 1.0}) # noqa: E741 @@ -174,84 +178,84 @@ class TestContexts(QuantityTestCase): g.update({l: {t, c}, t: {l}, c: {l}}) ureg.enable_contexts("lc") - self.assertEqual(ureg._active_ctx.graph, g_sp) + assert ureg._active_ctx.graph == g_sp ureg.disable_contexts(1) ureg.enable_contexts("lc", n=1) - self.assertEqual(ureg._active_ctx.graph, g_sp) + assert ureg._active_ctx.graph == g_sp ureg.disable_contexts(1) ureg.enable_contexts("ab") - self.assertEqual(ureg._active_ctx.graph, g_ab) + assert ureg._active_ctx.graph == g_ab ureg.disable_contexts(1) ureg.enable_contexts("lc") ureg.enable_contexts("ab") - self.assertEqual(ureg._active_ctx.graph, g) + assert ureg._active_ctx.graph == g ureg.disable_contexts(2) ureg.enable_contexts("ab") ureg.enable_contexts("lc") - self.assertEqual(ureg._active_ctx.graph, g) + assert ureg._active_ctx.graph == g ureg.disable_contexts(2) ureg.enable_contexts("lc", "ab") - self.assertEqual(ureg._active_ctx.graph, g) + assert ureg._active_ctx.graph == g ureg.disable_contexts(2) ureg.enable_contexts("ab", "lc") - self.assertEqual(ureg._active_ctx.graph, g) + assert ureg._active_ctx.graph == g ureg.disable_contexts(2) - def test_known_nested_context(self): + def test_known_nested_context(self, func_registry): ureg = UnitRegistry() add_ctxs(ureg) with ureg.context("lc"): x = dict(ureg._active_ctx) y = dict(ureg._active_ctx.graph) - self.assertTrue(ureg._active_ctx) - self.assertTrue(ureg._active_ctx.graph) + assert ureg._active_ctx + assert ureg._active_ctx.graph with ureg.context("ab"): - self.assertTrue(ureg._active_ctx) - self.assertTrue(ureg._active_ctx.graph) - self.assertNotEqual(x, ureg._active_ctx) - self.assertNotEqual(y, ureg._active_ctx.graph) + assert ureg._active_ctx + assert ureg._active_ctx.graph + assert x != ureg._active_ctx + assert y != ureg._active_ctx.graph - self.assertEqual(x, ureg._active_ctx) - self.assertEqual(y, ureg._active_ctx.graph) + assert x == ureg._active_ctx + assert y == ureg._active_ctx.graph - self.assertFalse(ureg._active_ctx) - self.assertFalse(ureg._active_ctx.graph) + assert not ureg._active_ctx + assert not ureg._active_ctx.graph - def test_unknown_context(self): - ureg = UnitRegistry() + def test_unknown_context(self, func_registry): + ureg = func_registry add_ctxs(ureg) - with self.assertRaises(KeyError): + with pytest.raises(KeyError): with ureg.context("la"): pass - self.assertFalse(ureg._active_ctx) - self.assertFalse(ureg._active_ctx.graph) + assert not ureg._active_ctx + assert not ureg._active_ctx.graph - def test_unknown_nested_context(self): + def test_unknown_nested_context(self, func_registry): ureg = UnitRegistry() add_ctxs(ureg) with ureg.context("lc"): x = dict(ureg._active_ctx) y = dict(ureg._active_ctx.graph) - with self.assertRaises(KeyError): + with pytest.raises(KeyError): with ureg.context("la"): pass - self.assertEqual(x, ureg._active_ctx) - self.assertEqual(y, ureg._active_ctx.graph) + assert x == ureg._active_ctx + assert y == ureg._active_ctx.graph - self.assertFalse(ureg._active_ctx) - self.assertFalse(ureg._active_ctx.graph) + assert not ureg._active_ctx + assert not ureg._active_ctx.graph - def test_one_context(self): + def test_one_context(self, func_registry): ureg = UnitRegistry() add_ctxs(ureg) @@ -262,14 +266,16 @@ class TestContexts(QuantityTestCase): meter_units = ureg.get_compatible_units(ureg.meter) hertz_units = ureg.get_compatible_units(ureg.hertz) - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc"): - self.assertEqual(q.to("Hz"), s) - self.assertEqual(ureg.get_compatible_units(q), meter_units | hertz_units) - self.assertRaises(DimensionalityError, q.to, "Hz") - self.assertEqual(ureg.get_compatible_units(q), meter_units) + assert q.to("Hz") == s + assert ureg.get_compatible_units(q) == meter_units | hertz_units + with pytest.raises(DimensionalityError): + q.to("Hz") + assert ureg.get_compatible_units(q) == meter_units - def test_multiple_context(self): + def test_multiple_context(self, func_registry): ureg = UnitRegistry() add_ctxs(ureg) @@ -281,16 +287,18 @@ class TestContexts(QuantityTestCase): hertz_units = ureg.get_compatible_units(ureg.hertz) ampere_units = ureg.get_compatible_units(ureg.ampere) - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc", "ab"): - self.assertEqual(q.to("Hz"), s) - self.assertEqual( - ureg.get_compatible_units(q), meter_units | hertz_units | ampere_units + assert q.to("Hz") == s + assert ( + ureg.get_compatible_units(q) == meter_units | hertz_units | ampere_units ) - self.assertRaises(DimensionalityError, q.to, "Hz") - self.assertEqual(ureg.get_compatible_units(q), meter_units) + with pytest.raises(DimensionalityError): + q.to("Hz") + assert ureg.get_compatible_units(q) == meter_units - def test_nested_context(self): + def test_nested_context(self, func_registry): ureg = UnitRegistry() add_ctxs(ureg) @@ -298,20 +306,23 @@ class TestContexts(QuantityTestCase): q = 500 * ureg.meter s = (ureg.speed_of_light / q).to("Hz") - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc"): - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s with ureg.context("ab"): - self.assertEqual(q.to("Hz"), s) - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s + assert q.to("Hz") == s with ureg.context("ab"): - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc"): - self.assertEqual(q.to("Hz"), s) - self.assertRaises(DimensionalityError, q.to, "Hz") + assert q.to("Hz") == s + with pytest.raises(DimensionalityError): + q.to("Hz") - def test_context_with_arg(self): + def test_context_with_arg(self, func_registry): ureg = UnitRegistry() @@ -320,23 +331,27 @@ class TestContexts(QuantityTestCase): q = 500 * ureg.meter s = (ureg.speed_of_light / q).to("Hz") - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc", n=1): - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s with ureg.context("ab"): - self.assertEqual(q.to("Hz"), s) - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s + assert q.to("Hz") == s with ureg.context("ab"): - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc", n=1): - self.assertEqual(q.to("Hz"), s) - self.assertRaises(DimensionalityError, q.to, "Hz") + assert q.to("Hz") == s + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc"): - self.assertRaises(TypeError, q.to, "Hz") + with pytest.raises(TypeError): + q.to("Hz") - def test_enable_context_with_arg(self): + def test_enable_context_with_arg(self, func_registry): ureg = UnitRegistry() @@ -345,28 +360,32 @@ class TestContexts(QuantityTestCase): q = 500 * ureg.meter s = (ureg.speed_of_light / q).to("Hz") - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") ureg.enable_contexts("lc", n=1) - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s ureg.enable_contexts("ab") - self.assertEqual(q.to("Hz"), s) - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s + assert q.to("Hz") == s ureg.disable_contexts(1) ureg.disable_contexts(1) ureg.enable_contexts("ab") - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") ureg.enable_contexts("lc", n=1) - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s ureg.disable_contexts(1) - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") ureg.disable_contexts(1) ureg.enable_contexts("lc") - self.assertRaises(TypeError, q.to, "Hz") + with pytest.raises(TypeError): + q.to("Hz") ureg.disable_contexts(1) - def test_context_with_arg_def(self): + def test_context_with_arg_def(self, func_registry): ureg = UnitRegistry() @@ -375,33 +394,39 @@ class TestContexts(QuantityTestCase): q = 500 * ureg.meter s = (ureg.speed_of_light / q).to("Hz") - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc"): - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s with ureg.context("ab"): - self.assertEqual(q.to("Hz"), s) - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s + assert q.to("Hz") == s with ureg.context("ab"): - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc"): - self.assertEqual(q.to("Hz"), s) - self.assertRaises(DimensionalityError, q.to, "Hz") + assert q.to("Hz") == s + with pytest.raises(DimensionalityError): + q.to("Hz") - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc", n=2): - self.assertEqual(q.to("Hz"), s / 2) + assert q.to("Hz") == s / 2 with ureg.context("ab"): - self.assertEqual(q.to("Hz"), s / 2) - self.assertEqual(q.to("Hz"), s / 2) + assert q.to("Hz") == s / 2 + assert q.to("Hz") == s / 2 with ureg.context("ab"): - self.assertRaises(DimensionalityError, q.to, "Hz") + with pytest.raises(DimensionalityError): + q.to("Hz") with ureg.context("lc", n=2): - self.assertEqual(q.to("Hz"), s / 2) - self.assertRaises(DimensionalityError, q.to, "Hz") + assert q.to("Hz") == s / 2 + with pytest.raises(DimensionalityError): + q.to("Hz") - def test_context_with_sharedarg_def(self): + def test_context_with_sharedarg_def(self, func_registry): ureg = UnitRegistry() @@ -412,63 +437,66 @@ class TestContexts(QuantityTestCase): u = (1 / 500) * ureg.ampere with ureg.context("lc"): - self.assertEqual(q.to("Hz"), s) + assert q.to("Hz") == s with ureg.context("ab"): - self.assertEqual(q.to("ampere"), u) + assert q.to("ampere") == u with ureg.context("ab"): - self.assertEqual(q.to("ampere"), 0 * u) + assert q.to("ampere") == 0 * u with ureg.context("lc"): - self.assertRaises(ZeroDivisionError, ureg.Quantity.to, q, "Hz") + with pytest.raises(ZeroDivisionError): + ureg.Quantity.to(q, "Hz") with ureg.context("lc", n=2): - self.assertEqual(q.to("Hz"), s / 2) + assert q.to("Hz") == s / 2 with ureg.context("ab"): - self.assertEqual(q.to("ampere"), 2 * u) + assert q.to("ampere") == 2 * u with ureg.context("ab", n=3): - self.assertEqual(q.to("ampere"), 3 * u) + assert q.to("ampere") == 3 * u with ureg.context("lc"): - self.assertEqual(q.to("Hz"), s / 3) + assert q.to("Hz") == s / 3 with ureg.context("lc", n=2): - self.assertEqual(q.to("Hz"), s / 2) + assert q.to("Hz") == s / 2 with ureg.context("ab", n=4): - self.assertEqual(q.to("ampere"), 4 * u) + assert q.to("ampere") == 4 * u with ureg.context("ab", n=3): - self.assertEqual(q.to("ampere"), 3 * u) + assert q.to("ampere") == 3 * u with ureg.context("lc", n=6): - self.assertEqual(q.to("Hz"), s / 6) + assert q.to("Hz") == s / 6 - def test_anonymous_context(self): + def test_anonymous_context(self, func_registry): ureg = UnitRegistry() c = Context() c.add_transformation("[length]", "[time]", lambda ureg, x: x / ureg("5 cm/s")) - self.assertRaises(ValueError, ureg.add_context, c) + with pytest.raises(ValueError): + ureg.add_context(c) x = ureg("10 cm") expect = ureg("2 s") - self.assertQuantityEqual(x.to("s", c), expect) + helpers.assert_quantity_equal(x.to("s", c), expect) with ureg.context(c): - self.assertQuantityEqual(x.to("s"), expect) + helpers.assert_quantity_equal(x.to("s"), expect) ureg.enable_contexts(c) - self.assertQuantityEqual(x.to("s"), expect) + helpers.assert_quantity_equal(x.to("s"), expect) ureg.disable_contexts(1) - self.assertRaises(DimensionalityError, x.to, "s") + with pytest.raises(DimensionalityError): + x.to("s") # Multiple anonymous contexts c2 = Context() c2.add_transformation("[length]", "[time]", lambda ureg, x: x / ureg("10 cm/s")) c2.add_transformation("[mass]", "[time]", lambda ureg, x: x / ureg("10 kg/s")) with ureg.context(c2, c): - self.assertQuantityEqual(x.to("s"), expect) + helpers.assert_quantity_equal(x.to("s"), expect) # Transformations only in c2 are still working even if c takes priority - self.assertQuantityEqual(ureg("100 kg").to("s"), ureg("10 s")) + helpers.assert_quantity_equal(ureg("100 kg").to("s"), ureg("10 s")) with ureg.context(c, c2): - self.assertQuantityEqual(x.to("s"), ureg("1 s")) + helpers.assert_quantity_equal(x.to("s"), ureg("1 s")) def _test_ctx(self, ctx): ureg = UnitRegistry() @@ -477,30 +505,32 @@ class TestContexts(QuantityTestCase): nctx = len(ureg._contexts) - self.assertNotIn(ctx.name, ureg._contexts) + assert ctx.name not in ureg._contexts ureg.add_context(ctx) - self.assertIn(ctx.name, ureg._contexts) - self.assertEqual(len(ureg._contexts), nctx + 1 + len(ctx.aliases)) + assert ctx.name in ureg._contexts + assert 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) + assert q.to("Hz") == s + assert s.to("meter") == q ureg.remove_context(ctx.name) - self.assertNotIn(ctx.name, ureg._contexts) - self.assertEqual(len(ureg._contexts), nctx) + assert ctx.name not in ureg._contexts + assert len(ureg._contexts) == nctx - def test_parse_invalid(self): - for badrow in ( + @pytest.mark.parametrize( + "badrow", + ( "[length] = 1 / [time]: c / value", "1 / [time] = [length]: c / value", "[length] <- [time] = c / value", "[length] - [time] = c / value", - ): - with self.subTest(badrow): - with self.assertRaises(DefinitionSyntaxError): - Context.from_lines(["@context c", badrow]) + ), + ) + def test_parse_invalid(self, badrow): + with pytest.raises(DefinitionSyntaxError): + Context.from_lines(["@context c", badrow]) def test_parse_simple(self): @@ -518,19 +548,19 @@ class TestContexts(QuantityTestCase): ] c = Context.from_lines(s) - self.assertEqual(c.name, "longcontextname") - self.assertEqual(c.aliases, ()) - self.assertEqual(c.defaults, {}) - self.assertEqual(c.funcs.keys(), {a, b}) + assert c.name == "longcontextname" + assert c.aliases == () + assert c.defaults == {} + assert c.funcs.keys() == {a, b} self._test_ctx(c) s = ["@context longcontextname = lc", "[length] <-> 1 / [time]: c / value"] c = Context.from_lines(s) - self.assertEqual(c.name, "longcontextname") - self.assertEqual(c.aliases, ("lc",)) - self.assertEqual(c.defaults, {}) - self.assertEqual(c.funcs.keys(), {a, b}) + assert c.name == "longcontextname" + assert c.aliases == ("lc",) + assert c.defaults == {} + assert c.funcs.keys() == {a, b} self._test_ctx(c) s = [ @@ -539,10 +569,10 @@ class TestContexts(QuantityTestCase): ] c = Context.from_lines(s) - self.assertEqual(c.name, "longcontextname") - self.assertEqual(c.aliases, ("lc", "lcn")) - self.assertEqual(c.defaults, {}) - self.assertEqual(c.funcs.keys(), {a, b}) + assert c.name == "longcontextname" + assert c.aliases == ("lc", "lcn") + assert c.defaults == {} + assert c.funcs.keys() == {a, b} self._test_ctx(c) def test_parse_auto_inverse(self): @@ -557,8 +587,8 @@ class TestContexts(QuantityTestCase): s = ["@context longcontextname", "[length] <-> 1 / [time]: c / value"] c = Context.from_lines(s) - self.assertEqual(c.defaults, {}) - self.assertEqual(c.funcs.keys(), {a, b}) + assert c.defaults == {} + assert c.funcs.keys() == {a, b} self._test_ctx(c) def test_parse_define(self): @@ -571,8 +601,8 @@ class TestContexts(QuantityTestCase): s = ["@context longcontextname", "[length] <-> 1 / [time]: c / value"] c = Context.from_lines(s) - self.assertEqual(c.defaults, {}) - self.assertEqual(c.funcs.keys(), {a, b}) + assert c.defaults == {} + assert c.funcs.keys() == {a, b} self._test_ctx(c) def test_parse_parameterized(self): @@ -586,8 +616,8 @@ class TestContexts(QuantityTestCase): s = ["@context(n=1) longcontextname", "[length] <-> 1 / [time]: n * c / value"] c = Context.from_lines(s) - self.assertEqual(c.defaults, {"n": 1}) - self.assertEqual(c.funcs.keys(), {a, b}) + assert c.defaults == {"n": 1} + assert c.funcs.keys() == {a, b} self._test_ctx(c) s = [ @@ -596,36 +626,42 @@ class TestContexts(QuantityTestCase): ] c = Context.from_lines(s) - self.assertEqual(c.defaults, {"n": 1, "bla": 2}) - self.assertEqual(c.funcs.keys(), {a, b}) + assert c.defaults == {"n": 1, "bla": 2} + assert c.funcs.keys() == {a, b} # If the variable is not present in the definition, then raise an error s = ["@context(n=1) longcontextname", "[length] <-> 1 / [time]: c / value"] - self.assertRaises(DefinitionSyntaxError, Context.from_lines, s) + with pytest.raises(DefinitionSyntaxError): + Context.from_lines(s) - def test_warnings(self): + def test_warnings(self, caplog): ureg = UnitRegistry() - with self.capture_log() as buffer: + with caplog.at_level(logging.DEBUG, "pint"): add_ctxs(ureg) d = Context("ab") ureg.add_context(d) - self.assertEqual(len(buffer), 1) - self.assertIn("ab", str(buffer[-1])) + assert len(caplog.records) == 1 + assert "ab" in str(caplog.records[-1].args) d = Context("ab1", aliases=("ab",)) ureg.add_context(d) - self.assertEqual(len(buffer), 2) - self.assertIn("ab", str(buffer[-1])) + assert len(caplog.records) == 2 + assert "ab" in str(caplog.records[-1].args) -class TestDefinedContexts(QuantityTestCase): +class TestDefinedContexts: + @classmethod + def setup_class(cls): + cls.ureg = UnitRegistry() - FORCE_NDARRAY = False + @classmethod + def teardown_class(cls): + cls.ureg = None def test_defined(self): ureg = self.ureg @@ -638,11 +674,11 @@ class TestDefinedContexts(QuantityTestCase): b = Context.__keytransform__( UnitsContainer({"[length]": 1.0}), UnitsContainer({"[time]": -1.0}) ) - self.assertIn(a, ureg._contexts["sp"].funcs) - self.assertIn(b, ureg._contexts["sp"].funcs) + assert a in ureg._contexts["sp"].funcs + assert b in ureg._contexts["sp"].funcs with ureg.context("sp"): - self.assertIn(a, ureg._active_ctx) - self.assertIn(b, ureg._active_ctx) + assert a in ureg._active_ctx + assert b in ureg._active_ctx def test_spectroscopy(self): ureg = self.ureg @@ -659,18 +695,18 @@ class TestDefinedContexts(QuantityTestCase): a.dimensionality, b.dimensionality ) p = find_shortest_path(ureg._active_ctx.graph, da, db) - self.assertTrue(p) + assert p msg = "{} <-> {}".format(a, b) # assertAlmostEqualRelError converts second to first - self.assertQuantityAlmostEqual(b, a, rtol=0.01, msg=msg) + helpers.assert_quantity_almost_equal(b, a, rtol=0.01, msg=msg) for a, b in itertools.product(eq, eq): - self.assertQuantityAlmostEqual(a.to(b.units, "sp"), b, rtol=0.01) + helpers.assert_quantity_almost_equal(a.to(b.units, "sp"), b, rtol=0.01) def test_textile(self): ureg = self.ureg qty_direct = 1.331 * ureg.tex - with self.assertRaises(DimensionalityError): + with pytest.raises(DimensionalityError): qty_indirect = qty_direct.to("Nm") with ureg.context("textile"): @@ -681,18 +717,23 @@ class TestDefinedContexts(QuantityTestCase): b = qty_indirect.to_base_units() da, db = Context.__keytransform__(a.dimensionality, b.dimensionality) p = find_shortest_path(ureg._active_ctx.graph, da, db) - self.assertTrue(p) + assert p msg = "{} <-> {}".format(a, b) - self.assertQuantityAlmostEqual(b, a, rtol=0.01, msg=msg) + helpers.assert_quantity_almost_equal(b, a, rtol=0.01, msg=msg) # Check RKM <-> cN/tex conversion - self.assertQuantityAlmostEqual(1 * ureg.RKM, 0.980665 * ureg.cN / ureg.tex) - self.assertQuantityAlmostEqual( + helpers.assert_quantity_almost_equal( + 1 * ureg.RKM, 0.980665 * ureg.cN / ureg.tex + ) + helpers.assert_quantity_almost_equal( (1 / 0.980665) * ureg.RKM, 1 * ureg.cN / ureg.tex ) - self.assertAlmostEqual((1 * ureg.RKM).to(ureg.cN / ureg.tex).m, 0.980665) - self.assertAlmostEqual( - (1 * ureg.cN / ureg.tex).to(ureg.RKM).m, 1 / 0.980665 + assert ( + round(abs((1 * ureg.RKM).to(ureg.cN / ureg.tex).m - 0.980665), 7) == 0 + ) + assert ( + round(abs((1 * ureg.cN / ureg.tex).to(ureg.RKM).m - 1 / 0.980665), 7) + == 0 ) def test_decorator(self): @@ -705,13 +746,14 @@ class TestDefinedContexts(QuantityTestCase): def f(wl): return wl.to("terahertz") - self.assertRaises(DimensionalityError, f, a) + with pytest.raises(DimensionalityError): + f(a) @ureg.with_context("sp") def g(wl): return wl.to("terahertz") - self.assertEqual(b, g(a)) + assert b == g(a) def test_decorator_composition(self): ureg = self.ureg @@ -730,256 +772,257 @@ class TestDefinedContexts(QuantityTestCase): def g(wl): return wl.to("terahertz") - self.assertEqual(b, f(a)) - self.assertEqual(b, g(a)) - - -class TestContextRedefinitions(QuantityTestCase): - def test_redefine(self): - ureg = UnitRegistry( - """ - foo = [d] = f = foo_alias - bar = 2 foo = b = bar_alias - baz = 3 bar = _ = baz_alias - asd = 4 baz - - @context c - # Note how we're redefining a symbol, not the base name, as a - # function of another name - b = 5 f - """.splitlines() - ) - # Units that are somehow directly or indirectly defined as a function of the - # overridden unit are also affected - foo = ureg.Quantity(1, "foo") - bar = ureg.Quantity(1, "bar") - asd = ureg.Quantity(1, "asd") - - # Test without context before and after, to verify that the cache and units have - # not been polluted - for enable_ctx in (False, True, False): - with self.subTest(enable_ctx): - if enable_ctx: - ureg.enable_contexts("c") - k = 5 - else: - k = 2 - - self.assertEqual(foo.to("b").magnitude, 1 / k) - self.assertEqual(foo.to("bar").magnitude, 1 / k) - self.assertEqual(foo.to("bar_alias").magnitude, 1 / k) - self.assertEqual(foo.to("baz").magnitude, 1 / k / 3) - self.assertEqual(bar.to("foo").magnitude, k) - self.assertEqual(bar.to("baz").magnitude, 1 / 3) - self.assertEqual(asd.to("foo").magnitude, 4 * 3 * k) - self.assertEqual(asd.to("bar").magnitude, 4 * 3) - self.assertEqual(asd.to("baz").magnitude, 4) - - ureg.disable_contexts() - - def test_define_nan(self): - ureg = UnitRegistry( - """ - USD = [currency] - EUR = nan USD - GBP = nan USD - - @context c - EUR = 1.11 USD - # Note that we're changing which unit GBP is defined against - GBP = 1.18 EUR - @end - """.splitlines() - ) + assert b == f(a) + assert b == g(a) + + +def test_redefine(subtests): + ureg = UnitRegistry( + """ + foo = [d] = f = foo_alias + bar = 2 foo = b = bar_alias + baz = 3 bar = _ = baz_alias + asd = 4 baz + + @context c + # Note how we're redefining a symbol, not the base name, as a + # function of another name + b = 5 f + """.splitlines() + ) + # Units that are somehow directly or indirectly defined as a function of the + # overridden unit are also affected + foo = ureg.Quantity(1, "foo") + bar = ureg.Quantity(1, "bar") + asd = ureg.Quantity(1, "asd") + + # Test without context before and after, to verify that the cache and units have + # not been polluted + for enable_ctx in (False, True, False): + with subtests.test(enable_ctx): + if enable_ctx: + ureg.enable_contexts("c") + k = 5 + else: + k = 2 + + assert foo.to("b").magnitude == 1 / k + assert foo.to("bar").magnitude == 1 / k + assert foo.to("bar_alias").magnitude == 1 / k + assert foo.to("baz").magnitude == 1 / k / 3 + assert bar.to("foo").magnitude == k + assert bar.to("baz").magnitude == 1 / 3 + assert asd.to("foo").magnitude == 4 * 3 * k + assert asd.to("bar").magnitude == 4 * 3 + assert asd.to("baz").magnitude == 4 + + ureg.disable_contexts() + + +def test_define_nan(): + ureg = UnitRegistry( + """ + USD = [currency] + EUR = nan USD + GBP = nan USD + + @context c + EUR = 1.11 USD + # Note that we're changing which unit GBP is defined against + GBP = 1.18 EUR + @end + """.splitlines() + ) + + q = ureg.Quantity("10 GBP") + assert q.magnitude == 10 + assert q.units.dimensionality == {"[currency]": 1} + assert q.to("GBP").magnitude == 10 + assert math.isnan(q.to("USD").magnitude) + assert round(abs(q.to("USD", "c").magnitude - 10 * 1.18 * 1.11), 7) == 0 + + +def test_non_multiplicative(subtests): + ureg = UnitRegistry( + """ + kelvin = [temperature] + fahrenheit = 5 / 9 * kelvin; offset: 255 + bogodegrees = 9 * kelvin + + @context nonmult_to_nonmult + fahrenheit = 7 * kelvin; offset: 123 + @end + @context nonmult_to_mult + fahrenheit = 123 * kelvin + @end + @context mult_to_nonmult + bogodegrees = 5 * kelvin; offset: 123 + @end + """.splitlines() + ) + k = ureg.Quantity(100, "kelvin") + + with subtests.test("baseline"): + assert round(abs(k.to("fahrenheit").magnitude - (100 - 255) * 9 / 5), 7) == 0 + assert round(abs(k.to("bogodegrees").magnitude - 100 / 9), 7) == 0 + + with subtests.test("nonmult_to_nonmult"): + with ureg.context("nonmult_to_nonmult"): + assert round(abs(k.to("fahrenheit").magnitude - (100 - 123) / 7), 7) == 0 + + with subtests.test("nonmult_to_mult"): + with ureg.context("nonmult_to_mult"): + assert round(abs(k.to("fahrenheit").magnitude - 100 / 123), 7) == 0 + + with subtests.test("mult_to_nonmult"): + with ureg.context("mult_to_nonmult"): + assert round(abs(k.to("bogodegrees").magnitude - (100 - 123) / 5), 7) == 0 + + +def test_stack_contexts(): + ureg = UnitRegistry( + """ + a = [dim1] + b = 1/2 a + c = 1/3 a + d = [dim2] + + @context c1 + b = 1/4 a + c = 1/6 a + [dim1]->[dim2]: value * 2 d/a + @end + @context c2 + b = 1/5 a + [dim1]->[dim2]: value * 3 d/a + @end + """.splitlines() + ) + q = ureg.Quantity(1, "a") + assert q.to("b").magnitude == 2 + assert q.to("c").magnitude == 3 + assert q.to("b", "c1").magnitude == 4 + assert q.to("c", "c1").magnitude == 6 + assert q.to("d", "c1").magnitude == 2 + assert q.to("b", "c2").magnitude == 5 + assert q.to("c", "c2").magnitude == 3 + assert q.to("d", "c2").magnitude == 3 + assert q.to("b", "c1", "c2").magnitude == 5 # c2 takes precedence + assert q.to("c", "c1", "c2").magnitude == 6 # c2 doesn't change it, so use c1 + assert q.to("d", "c1", "c2").magnitude == 3 # c2 takes precedence + + +def test_err_to_base_unit(): + expected = "Can't define base units within a context" + with pytest.raises(DefinitionSyntaxError, match=expected): + Context.from_lines(["@context c", "x = [d]"]) + + +def test_err_change_base_unit(): + ureg = UnitRegistry( + """ + foo = [d1] + bar = [d2] + + @context c + bar = foo + @end + """.splitlines() + ) - q = ureg.Quantity("10 GBP") - self.assertEquals(q.magnitude, 10) - self.assertEquals(q.units.dimensionality, {"[currency]": 1}) - self.assertEquals(q.to("GBP").magnitude, 10) - self.assertTrue(math.isnan(q.to("USD").magnitude)) - self.assertAlmostEqual(q.to("USD", "c").magnitude, 10 * 1.18 * 1.11) - - def test_non_multiplicative(self): - ureg = UnitRegistry( - """ - kelvin = [temperature] - fahrenheit = 5 / 9 * kelvin; offset: 255 - bogodegrees = 9 * kelvin - - @context nonmult_to_nonmult - fahrenheit = 7 * kelvin; offset: 123 - @end - @context nonmult_to_mult - fahrenheit = 123 * kelvin - @end - @context mult_to_nonmult - bogodegrees = 5 * kelvin; offset: 123 - @end - """.splitlines() - ) - k = ureg.Quantity(100, "kelvin") - - with self.subTest("baseline"): - self.assertAlmostEqual(k.to("fahrenheit").magnitude, (100 - 255) * 9 / 5) - self.assertAlmostEqual(k.to("bogodegrees").magnitude, 100 / 9) - - with self.subTest("nonmult_to_nonmult"): - with ureg.context("nonmult_to_nonmult"): - self.assertAlmostEqual(k.to("fahrenheit").magnitude, (100 - 123) / 7) - - with self.subTest("nonmult_to_mult"): - with ureg.context("nonmult_to_mult"): - self.assertAlmostEqual(k.to("fahrenheit").magnitude, 100 / 123) - - with self.subTest("mult_to_nonmult"): - with ureg.context("mult_to_nonmult"): - self.assertAlmostEqual(k.to("bogodegrees").magnitude, (100 - 123) / 5) - - def test_stack_contexts(self): - ureg = UnitRegistry( - """ - a = [dim1] - b = 1/2 a - c = 1/3 a - d = [dim2] - - @context c1 - b = 1/4 a - c = 1/6 a - [dim1]->[dim2]: value * 2 d/a - @end - @context c2 - b = 1/5 a - [dim1]->[dim2]: value * 3 d/a - @end - """.splitlines() - ) - q = ureg.Quantity(1, "a") - assert q.to("b").magnitude == 2 - assert q.to("c").magnitude == 3 - assert q.to("b", "c1").magnitude == 4 - assert q.to("c", "c1").magnitude == 6 - assert q.to("d", "c1").magnitude == 2 - assert q.to("b", "c2").magnitude == 5 - assert q.to("c", "c2").magnitude == 3 - assert q.to("d", "c2").magnitude == 3 - assert q.to("b", "c1", "c2").magnitude == 5 # c2 takes precedence - assert q.to("c", "c1", "c2").magnitude == 6 # c2 doesn't change it, so use c1 - assert q.to("d", "c1", "c2").magnitude == 3 # c2 takes precedence - - def test_err_to_base_unit(self): - with self.assertRaises(DefinitionSyntaxError) as e: - Context.from_lines(["@context c", "x = [d]"]) - self.assertEquals(str(e.exception), "Can't define base units within a context") - - def test_err_change_base_unit(self): - ureg = UnitRegistry( - """ - foo = [d1] - bar = [d2] - - @context c - bar = foo - @end - """.splitlines() - ) + expected = "Can't redefine a base unit to a derived one" + with pytest.raises(ValueError, match=expected): + ureg.enable_contexts("c") - with self.assertRaises(ValueError) as e: - ureg.enable_contexts("c") - self.assertEquals( - str(e.exception), "Can't redefine a base unit to a derived one" - ) - def test_err_change_dimensionality(self): - ureg = UnitRegistry( - """ - foo = [d1] - bar = [d2] - baz = foo - - @context c - baz = bar - @end - """.splitlines() - ) - with self.assertRaises(ValueError) as e: - ureg.enable_contexts("c") - self.assertEquals( - str(e.exception), - "Can't change dimensionality of baz from [d1] to [d2] in a context", - ) +def test_err_change_dimensionality(): + ureg = UnitRegistry( + """ + foo = [d1] + bar = [d2] + baz = foo - def test_err_cyclic_dependency(self): - ureg = UnitRegistry( - """ - foo = [d] - bar = foo + @context c baz = bar + @end + """.splitlines() + ) + expected = re.escape( + "Can't change dimensionality of baz from [d1] to [d2] in a context" + ) + with pytest.raises(ValueError, match=expected): + ureg.enable_contexts("c") - @context c - bar = baz - @end - """.splitlines() - ) - # TODO align this exception and the one you get when you implement a cyclic - # dependency within the base registry. Ideally this exception should be - # raised by enable_contexts. + +def test_err_cyclic_dependency(): + ureg = UnitRegistry( + """ + foo = [d] + bar = foo + baz = bar + + @context c + bar = baz + @end + """.splitlines() + ) + # TODO align this exception and the one you get when you implement a cyclic + # dependency within the base registry. Ideally this exception should be + # raised by enable_contexts. + ureg.enable_contexts("c") + q = ureg.Quantity("bar") + with pytest.raises(RecursionError): + q.to("foo") + + +def test_err_dimension_redefinition(): + expected = re.escape("Expected <unit> = <converter>; got [d1] = [d2] * [d3]") + with pytest.raises(DefinitionSyntaxError, match=expected): + Context.from_lines(["@context c", "[d1] = [d2] * [d3]"]) + + +def test_err_prefix_redefinition(): + expected = re.escape("Expected <unit> = <converter>; got [d1] = [d2] * [d3]") + with pytest.raises(DefinitionSyntaxError, match=expected): + Context.from_lines(["@context c", "[d1] = [d2] * [d3]"]) + + +def test_err_redefine_alias(subtests): + expected = "Can't change a unit's symbol or aliases within a context" + for s in ("foo = bar = f", "foo = bar = _ = baz"): + with subtests.test(s): + with pytest.raises(DefinitionSyntaxError, match=expected): + Context.from_lines(["@context c", s]) + + +def test_err_redefine_with_prefix(): + ureg = UnitRegistry( + """ + kilo- = 1000 + gram = [mass] + pound = 454 gram + + @context c + kilopound = 500000 gram + @end + """.splitlines() + ) + + expected = "Can't redefine a unit with a prefix: kilopound" + with pytest.raises(ValueError, match=expected): ureg.enable_contexts("c") - q = ureg.Quantity("bar") - with self.assertRaises(RecursionError): - q.to("foo") - - def test_err_dimension_redefinition(self): - with self.assertRaises(DefinitionSyntaxError) as e: - Context.from_lines(["@context c", "[d1] = [d2] * [d3]"]) - self.assertEquals( - str(e.exception), "Expected <unit> = <converter>; got [d1] = [d2] * [d3]" - ) - def test_err_prefix_redefinition(self): - with self.assertRaises(DefinitionSyntaxError) as e: - Context.from_lines(["@context c", "[d1] = [d2] * [d3]"]) - self.assertEquals( - str(e.exception), "Expected <unit> = <converter>; got [d1] = [d2] * [d3]" - ) - def test_err_redefine_alias(self): - for s in ("foo = bar = f", "foo = bar = _ = baz"): - with self.subTest(s): - with self.assertRaises(DefinitionSyntaxError) as e: - Context.from_lines(["@context c", s]) - self.assertEquals( - str(e.exception), - "Can't change a unit's symbol or aliases within a context", - ) - - def test_err_redefine_with_prefix(self): - ureg = UnitRegistry( - """ - kilo- = 1000 - gram = [mass] - pound = 454 gram - - @context c - kilopound = 500000 gram - @end - """.splitlines() - ) - with self.assertRaises(ValueError) as e: - ureg.enable_contexts("c") - self.assertEquals( - str(e.exception), "Can't redefine a unit with a prefix: kilopound" - ) +def test_err_new_unit(): + ureg = UnitRegistry( + """ + foo = [d] + @context c + bar = foo + @end + """.splitlines() + ) - def test_err_new_unit(self): - ureg = UnitRegistry( - """ - foo = [d] - @context c - bar = foo - @end - """.splitlines() - ) - with self.assertRaises(UndefinedUnitError) as e: - ureg.enable_contexts("c") - self.assertEquals(str(e.exception), "'bar' is not defined in the unit registry") + expected = "'bar' is not defined in the unit registry" + with pytest.raises(UndefinedUnitError, match=expected): + ureg.enable_contexts("c") |