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esphome/tests/unit_tests/test_cpp_generator.py
Guillermo Ruffino 69879920eb
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Python

from typing import Iterator
import math
import pytest
from esphome import cpp_generator as cg
from esphome import cpp_types as ct
class TestExpressions:
@pytest.mark.parametrize(
"target, expected",
(
(cg.RawExpression("foo && bar"), "foo && bar"),
(cg.AssignmentExpression(None, None, "foo", "bar", None), 'foo = "bar"'),
(cg.AssignmentExpression(ct.float_, "*", "foo", 1, None), "float *foo = 1"),
(cg.AssignmentExpression(ct.float_, "", "foo", 1, None), "float foo = 1"),
(cg.VariableDeclarationExpression(ct.int32, "*", "foo"), "int32_t *foo"),
(cg.VariableDeclarationExpression(ct.int32, "", "foo"), "int32_t foo"),
(cg.ParameterExpression(ct.std_string, "foo"), "std::string foo"),
),
)
def test_str__simple(self, target: cg.Expression, expected: str):
actual = str(target)
assert actual == expected
class TestExpressionList:
SAMPLE_ARGS = (1, "2", True, None, None)
def test_str(self):
target = cg.ExpressionList(*self.SAMPLE_ARGS)
actual = str(target)
assert actual == '1, "2", true'
def test_iter(self):
target = cg.ExpressionList(*self.SAMPLE_ARGS)
actual = iter(target)
assert isinstance(actual, Iterator)
assert len(tuple(actual)) == 3
class TestTemplateArguments:
SAMPLE_ARGS = (int, 1, "2", True, None, None)
def test_str(self):
target = cg.TemplateArguments(*self.SAMPLE_ARGS)
actual = str(target)
assert actual == '<int32_t, 1, "2", true>'
def test_iter(self):
target = cg.TemplateArguments(*self.SAMPLE_ARGS)
actual = iter(target)
assert isinstance(actual, Iterator)
assert len(tuple(actual)) == 4
class TestCallExpression:
def test_str__no_template_args(self):
target = cg.CallExpression(cg.RawExpression("my_function"), 1, "2", False)
actual = str(target)
assert actual == 'my_function(1, "2", false)'
def test_str__with_template_args(self):
target = cg.CallExpression(
cg.RawExpression("my_function"),
cg.TemplateArguments(int, float),
1,
"2",
False,
)
actual = str(target)
assert actual == 'my_function<int32_t, float>(1, "2", false)'
class TestStructInitializer:
def test_str(self):
target = cg.StructInitializer(
cg.MockObjClass("foo::MyStruct", parents=()),
("state", "on"),
("min_length", 1),
("max_length", 5),
("foo", None),
)
actual = str(target)
assert (
actual == "foo::MyStruct{\n"
' .state = "on",\n'
" .min_length = 1,\n"
" .max_length = 5,\n"
"}"
)
class TestArrayInitializer:
def test_str__empty(self):
target = cg.ArrayInitializer(None, None)
actual = str(target)
assert actual == "{}"
def test_str__not_multiline(self):
target = cg.ArrayInitializer(1, 2, 3, 4)
actual = str(target)
assert actual == "{1, 2, 3, 4}"
def test_str__multiline(self):
target = cg.ArrayInitializer(1, 2, 3, 4, multiline=True)
actual = str(target)
assert actual == "{\n 1,\n 2,\n 3,\n 4,\n}"
class TestParameterListExpression:
def test_str(self):
target = cg.ParameterListExpression(
cg.ParameterExpression(int, "foo"),
(float, "bar"),
)
actual = str(target)
assert actual == "int32_t foo, float bar"
class TestLambdaExpression:
def test_str__no_return(self):
target = cg.LambdaExpression(
(
"if ((foo == 5) && (bar < 10))) {\n",
"}",
),
((int, "foo"), (float, "bar")),
)
actual = str(target)
assert actual == (
"[=](int32_t foo, float bar) {\n"
" if ((foo == 5) && (bar < 10))) {\n"
" }\n"
"}"
)
def test_str__with_return(self):
target = cg.LambdaExpression(
("return (foo == 5) && (bar < 10));",),
cg.ParameterListExpression((int, "foo"), (float, "bar")),
"=",
bool,
)
actual = str(target)
assert actual == (
"[=](int32_t foo, float bar) -> bool {\n"
" return (foo == 5) && (bar < 10));\n"
"}"
)
class TestLiterals:
@pytest.mark.parametrize(
"target, expected",
(
(cg.StringLiteral("foo"), '"foo"'),
(cg.IntLiteral(0), "0"),
(cg.IntLiteral(42), "42"),
(cg.IntLiteral(4304967295), "4304967295ULL"),
(cg.IntLiteral(2150483647), "2150483647UL"),
(cg.IntLiteral(-2150083647), "-2150083647LL"),
(cg.BoolLiteral(True), "true"),
(cg.BoolLiteral(False), "false"),
(cg.HexIntLiteral(0), "0x00"),
(cg.HexIntLiteral(42), "0x2A"),
(cg.HexIntLiteral(682), "0x2AA"),
(cg.FloatLiteral(0.0), "0.0f"),
(cg.FloatLiteral(4.2), "4.2f"),
(cg.FloatLiteral(1.23456789), "1.23456789f"),
(cg.FloatLiteral(math.nan), "NAN"),
),
)
def test_str__simple(self, target: cg.Literal, expected: str):
actual = str(target)
assert actual == expected
FAKE_ENUM_VALUE = cg.EnumValue()
FAKE_ENUM_VALUE.enum_value = "foo"
@pytest.mark.parametrize(
"obj, expected_type",
(
(cg.RawExpression("foo"), cg.RawExpression),
(FAKE_ENUM_VALUE, cg.StringLiteral),
(True, cg.BoolLiteral),
("foo", cg.StringLiteral),
(cg.HexInt(42), cg.HexIntLiteral),
(42, cg.IntLiteral),
(42.1, cg.FloatLiteral),
(cg.TimePeriodMicroseconds(microseconds=42), cg.IntLiteral),
(cg.TimePeriodMilliseconds(milliseconds=42), cg.IntLiteral),
(cg.TimePeriodSeconds(seconds=42), cg.IntLiteral),
(cg.TimePeriodMinutes(minutes=42), cg.IntLiteral),
((1, 2, 3), cg.ArrayInitializer),
([1, 2, 3], cg.ArrayInitializer),
),
)
def test_safe_exp__allowed_values(obj, expected_type):
actual = cg.safe_exp(obj)
assert isinstance(actual, expected_type)
@pytest.mark.parametrize(
"obj, expected_type",
(
(bool, ct.bool_),
(int, ct.int32),
(float, ct.float_),
),
)
def test_safe_exp__allowed_types(obj, expected_type):
actual = cg.safe_exp(obj)
assert actual is expected_type
@pytest.mark.parametrize(
"obj, expected_error",
(
(cg.ID("foo"), "Object foo is an ID."),
((x for x in "foo"), r"Object <.*> is a coroutine."),
(None, "Object is not an expression"),
),
)
def test_safe_exp__invalid_values(obj, expected_error):
with pytest.raises(ValueError, match=expected_error):
cg.safe_exp(obj)
class TestStatements:
@pytest.mark.parametrize(
"target, expected",
(
(cg.RawStatement("foo && bar"), "foo && bar"),
(cg.ExpressionStatement("foo"), '"foo";'),
(cg.ExpressionStatement(42), "42;"),
(cg.LineComment("The point of foo is..."), "// The point of foo is..."),
(
cg.LineComment("Help help\nI'm being repressed"),
"// Help help\n// I'm being repressed",
),
(
cg.ProgmemAssignmentExpression(ct.uint16, "foo", "bar", None),
'static const uint16_t foo[] PROGMEM = "bar"',
),
),
)
def test_str__simple(self, target: cg.Statement, expected: str):
actual = str(target)
assert actual == expected
# TODO: This method has side effects in CORE
# def test_progmem_array():
# pass
class TestMockObj:
def test_getattr(self):
target = cg.MockObj("foo")
actual = target.eek
assert isinstance(actual, cg.MockObj)
assert actual.base == "foo.eek"
assert actual.op == "."