1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
// Copyright 2022 Benjamin Barenblat
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#include "src/astro.h"
#include <gmock/gmock.h>
#include <gtest/gtest.h>
#include <chrono>
#include "third_party/date/include/date/tz.h"
namespace glplanet {
namespace {
using ::testing::DoubleNear;
using ::testing::Pair;
TEST(SunEquatorialPositionTest, MeeusExercise25A) {
// October 13, 1992, at 00:00:00 TDT (T = -0.072'183'436)
constexpr auto t =
std::chrono::time_point<date::tai_clock, std::chrono::milliseconds>() +
std::chrono::days(34 * 365 + 8 /* leap days */) +
std::chrono::days(31 + 29 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 11) +
std::chrono::hours(23) + std::chrono::minutes(59) +
std::chrono::milliseconds(27'816);
EXPECT_THAT(SunEquatorialPosition(t), Pair(DoubleNear(-2.82078673, 1e-8),
DoubleNear(-0.1358751, 1e-8)));
}
TEST(ApparentSiderealTimeAtGreenwichTest, MeeusExercise12A) {
// April 10, 1987, at 00:00:00 UT (T = -0.127'296'372'348)
constexpr auto t =
std::chrono::time_point<date::tai_clock, std::chrono::milliseconds>() +
std::chrono::days(29 * 365 + 7 /* leap days */) +
std::chrono::days(31 + 28 + 31 + 8) + std::chrono::hours(23) +
std::chrono::minutes(59) + std::chrono::milliseconds(27'816);
EXPECT_THAT(ApparentSiderealTimeAtGreenwich(t), DoubleNear(-2.832805, 1e-6));
}
TEST(HighNoonLocationTest, MarchEquinox) {
// March 20, 2022 15:29:52.331 UT
constexpr auto t =
std::chrono::time_point<date::tai_clock, std::chrono::milliseconds>() +
std::chrono::days(64 * 365 + 16 /* leap days */) +
std::chrono::days(31 + 28 + 19) + std::chrono::hours(15) +
std::chrono::minutes(29) + std::chrono::milliseconds(24'515);
EXPECT_THAT(HighNoonLocation(t),
Pair(DoubleNear(-0.883655431852, 1e-10), DoubleNear(0.0, 1e-10)));
}
} // namespace
} // namespace glplanet
|
