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[core] Add step_to_accuracy_decimals benchmarks (#18826)

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J. Nick Koston
2026-08-27 15:28:04 -05:00
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parent 25d5cd3e14
commit 16d0fa1165
2 changed files with 111 additions and 0 deletions
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tests/components/core/test_helpers.cpp
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@@ -1,4 +1,5 @@
#include <gtest/gtest.h>
#include <cmath>
#include <cstring>
#include "esphome/core/alloc_helpers.h"
@@ -280,4 +281,71 @@ TEST(Base64, Rfc4648Vectors) {
}
}
// --- step_to_accuracy_decimals() ---
TEST(StepToAccuracyDecimals, TypicalSteps) {
EXPECT_EQ(step_to_accuracy_decimals(0.001f), 3);
EXPECT_EQ(step_to_accuracy_decimals(0.005f), 3);
EXPECT_EQ(step_to_accuracy_decimals(0.01f), 2);
EXPECT_EQ(step_to_accuracy_decimals(0.025f), 3);
EXPECT_EQ(step_to_accuracy_decimals(0.05f), 2);
EXPECT_EQ(step_to_accuracy_decimals(0.1f), 1);
EXPECT_EQ(step_to_accuracy_decimals(0.25f), 2);
EXPECT_EQ(step_to_accuracy_decimals(0.5f), 1);
EXPECT_EQ(step_to_accuracy_decimals(1.5f), 1);
EXPECT_EQ(step_to_accuracy_decimals(2.5f), 1);
}
TEST(StepToAccuracyDecimals, WholeSteps) {
EXPECT_EQ(step_to_accuracy_decimals(1.0f), 0);
EXPECT_EQ(step_to_accuracy_decimals(2.0f), 0);
EXPECT_EQ(step_to_accuracy_decimals(5.0f), 0);
EXPECT_EQ(step_to_accuracy_decimals(10.0f), 0);
EXPECT_EQ(step_to_accuracy_decimals(100.0f), 0);
EXPECT_EQ(step_to_accuracy_decimals(1000.0f), 0);
}
TEST(StepToAccuracyDecimals, FiveSignificantDigits) {
EXPECT_EQ(step_to_accuracy_decimals(1.23456f), 4);
EXPECT_EQ(step_to_accuracy_decimals(12.345f), 3);
EXPECT_EQ(step_to_accuracy_decimals(123.45f), 2);
EXPECT_EQ(step_to_accuracy_decimals(1234.5f), 1);
EXPECT_EQ(step_to_accuracy_decimals(12345.0f), 0);
EXPECT_EQ(step_to_accuracy_decimals(0.33333f), 5);
EXPECT_EQ(step_to_accuracy_decimals(0.0001f), 4);
}
TEST(StepToAccuracyDecimals, TrailingZerosDropped) {
EXPECT_EQ(step_to_accuracy_decimals(0.3f), 1);
EXPECT_EQ(step_to_accuracy_decimals(0.7f), 1);
EXPECT_EQ(step_to_accuracy_decimals(0.125f), 3);
EXPECT_EQ(step_to_accuracy_decimals(0.0625f), 4);
}
TEST(StepToAccuracyDecimals, RoundsUpToWholeNumber) {
// Rounds to five significant digits first, so this becomes 10 with no decimals.
EXPECT_EQ(step_to_accuracy_decimals(9.999999f), 0);
}
TEST(StepToAccuracyDecimals, OutsideFixedNotationRange) {
// %.5g prints these in exponent form, so the count comes from parsing "1e-05" or "1.2346e+05".
EXPECT_EQ(step_to_accuracy_decimals(0.00001f), 0);
EXPECT_EQ(step_to_accuracy_decimals(0.000125f), 6);
EXPECT_EQ(step_to_accuracy_decimals(123456.0f), 8);
EXPECT_EQ(step_to_accuracy_decimals(1000000.0f), 0);
}
TEST(StepToAccuracyDecimals, SignIgnored) {
EXPECT_EQ(step_to_accuracy_decimals(-0.1f), 1);
EXPECT_EQ(step_to_accuracy_decimals(-0.25f), 2);
EXPECT_EQ(step_to_accuracy_decimals(-1.0f), 0);
}
TEST(StepToAccuracyDecimals, NonFiniteAndZero) {
EXPECT_EQ(step_to_accuracy_decimals(0.0f), 0);
EXPECT_EQ(step_to_accuracy_decimals(NAN), 0);
EXPECT_EQ(step_to_accuracy_decimals(INFINITY), 0);
EXPECT_EQ(step_to_accuracy_decimals(-INFINITY), 0);
}
} // namespace esphome::core::testing