/
react.html
169 lines (144 loc) · 4.72 KB
/
react.html
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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Equal and opposite Reactions</title>
<link rel="stylesheet" href="css/mocha.css">
<style media="screen">
<!-- style for message box and style for error -->
.MessageBox {
margin: 1em;
padding: 2em;
}
.error{
border: 1px solid red;
background-color: #eeebbb;
}
.success{
border: 1px solid blue;
background-color: #bbeebb;
}
.hidden{
display: none;
}
</style>
</head>
<body>
<main id="content"></main>
<!-- add content area for mocha test framework results -->
<div id="mocha"></div>
<script src="js/babel-standalone"></script>
<script src="js/react.min.js"></script>
<script src="js/react-dom.min.js"></script>
<script src="js/chai.js"></script>
<script src="js/mocha.js"></script>
<script type="text/babel" data-presets="react">
// ask React to render the content
// two inputs - the div, and the content where you want to render it
// this looks like html in js.. this is jsx (java script extensions)
// component should start with a capital letter
class NameInput extends React.Component {
// intialise in a constructor that gets called when the the component is created.
constructor(props) {
super(props);
this.state = {
message: {
// because no value, it will default to hidden
type: undefined,
body: undefined
}
};
// bind button click in the constructor, so that it has access to object
// do this every time we need an event handler
this.buttonClicked = this.buttonClicked.bind(this);
}
// render is usually best at the bottom, so put button event here
buttonClicked(evt) {
let name = this.refs.nameInput.value;
this.setState({
message: {
// ? is a ternerary option - if name has a value put success else err
type: name ? "success" : "error",
body: name ? "welcome to React, " + name : "Please enter a name."
}
});
}
// every component needs a render function
render() {
let msg = this.state.message;
return (
<div>
<label>
Insert Name: <input ref="nameInput" type="text" />
</label>
// add id to button to make it easier to find in the tests etc.
<button id="inputButton" onClick={this.buttonClicked}>
Click here
</button>
<MessageBox type={msg.type} message={msg.body} />
</div>
);
}
}
class MessageBox extends React.Component {
render() {
return (
// if we get a prop(erty) type then use it, if not hidden is default
<div className={"messageBox " + (this.props.type || "hidden")}>
{this.props.message}
</div>
);
}
}
ReactDOM.render(<NameInput />, document.getElementById("content"));
</script>
<script type="text/babel" data-preset="react">
const assert = chai.assert;
// add mocha (behaviour driven development)
mocha.ui("bdd");
mocha.reporter("html");
// each set of tests below are defined with an anon func
describe("Set of chai tests, served with mocha", () => {
it("Prove math works", () => {
// with chai only, this won't show in the console because it passes
assert.equal(5, 3 + 2, "Math works!");
// this will show in the console because it fails
assert.notEqual(6, 3 + 2, "Math still works!");
assert.closeTo(Math.PI, 3, 0.2, "Pi is close");
});
it("Found our component", () => {
assert.isDefined(MessageBox, "Message box is defined");
});
it("I am greeted correctly", () => {
let myName = "Mike";
const greeting = name => "Hello " + name + "!";
assert.include(greeting(myName), myName, "Greeting includes name");
});
});
// add a new set of tests to test the react document
describe("Test the document", () => {
it("Rendered empty msg box on load", () => {
// querySelector is a bit like getByID but more flexible
// target the thing that has the msgBox class (the div)
// .messageBox will return the element with that class
let msgBox = document.querySelector(".messageBox");
assert.isDefined(msgBox, "Message box is defined");
// check it is hidden
assert.include(msgBox.classList.value, "hidden", "class is hidden");
// check the test is empty (undefined)
assert.equal(msgBox.innerText, "", "is text empty");
});
it("Renders error when empty", () => {
// we need to simulate an action
let msgBox = document.querySelector(".messageBox");
// find by id using hash
let button = document.querySelector("#inputButton");
button.click();
assert.include(msgBox.classList.value, "error", "class is error");
});
});
// tell mocha to run tests
mocha.run();
</script>
</body>
</html>