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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
//
// lager - library for functional interactive c++ programs
// Copyright (C) 2017 Juan Pedro Bolivar Puente
//
// This file is part of lager.
//
// lager is free software: you can redistribute it and/or modify
// it under the terms of the MIT License, as detailed in the LICENSE
// file located at the root of this source code distribution,
// or here: <https://github.com/arximboldi/lager/blob/master/LICENSE>
//
#include <catch2/catch.hpp>
#include <lager/debug/debugger.hpp>
#include <lager/event_loop/manual.hpp>
#include <lager/store.hpp>
#include "../example/counter/counter.hpp"
#include <optional>
struct dummy_debugger
{
struct impl
{
template <typename Context, typename Reader>
void init(Context&&, Reader&&)
{}
};
template <typename Debugger>
std::shared_ptr<impl> make(Debugger)
{
return std::make_shared<impl>();
}
};
TEST_CASE("basic")
{
auto debugger = dummy_debugger{};
auto viewed = std::optional<counter::model>{std::nullopt};
auto view = [&](auto model) { viewed = model; };
auto store =
lager::make_store<counter::action>(counter::model{},
lager::with_manual_event_loop{},
lager::with_debugger(debugger));
watch(store, [&](auto&& v) { view(v); });
store.dispatch(counter::increment_action{});
CHECK(viewed);
CHECK(viewed->value == 1);
}
TEST_CASE("effect as a result")
{
auto debugger = dummy_debugger{};
auto viewed = std::optional<int>{std::nullopt};
auto view = [&](auto model) { viewed = model; };
auto called = 0;
auto effect = [&](lager::context<int> ctx) { ++called; };
auto store =
lager::make_store<int>(0,
lager::with_manual_event_loop{},
lager::with_reducer([=](int model, int action) {
return std::pair{model + action, effect};
}),
lager::with_debugger(debugger));
watch(store, [&](auto&& v) { view(v); });
store.dispatch(2);
CHECK(viewed);
CHECK(*viewed == 2);
CHECK(called == 1);
}
namespace services {
struct foo
{
int x = 0;
};
} // namespace services
TEST_CASE("effect with dependencies")
{
auto debugger = dummy_debugger{};
auto called = 0;
auto f = services::foo{};
auto effect = [&](auto ctx) {
CHECK(lager::get<services::foo>(ctx).x == 42);
++called;
};
auto store =
lager::make_store<int>(0,
lager::with_manual_event_loop{},
lager::with_deps(std::ref(f)),
lager::with_reducer([=](int model, int action) {
return std::pair{model + action, effect};
}),
// important: debugger must be last so it can
// forward the deps properly
lager::with_debugger(debugger));
f.x = 42;
store.dispatch(2);
CHECK(called == 1);
}
|
