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
|
# frozen_string_literal: true
RSpec.describe TTY::Reader, "#read_line" do
let(:input) { StringIO.new }
let(:output) { StringIO.new }
let(:env) { { "TTY_TEST" => true } }
subject(:reader) { described_class.new(input: input, output: output, env: env) }
it "masks characters" do
input << "password\n"
input.rewind
answer = reader.read_line(echo: false)
expect(answer).to eq("password\n")
end
it "echoes characters back" do
input << "password\n"
input.rewind
answer = reader.read_line
expect(answer).to eq("password\n")
expect(output.string).to eq([
"\e[2K\e[1Gp",
"\e[2K\e[1Gpa",
"\e[2K\e[1Gpas",
"\e[2K\e[1Gpass",
"\e[2K\e[1Gpassw",
"\e[2K\e[1Gpasswo",
"\e[2K\e[1Gpasswor",
"\e[2K\e[1Gpassword",
"\e[2K\e[1Gpassword\n"
].join)
end
it "doesn't echo characters back" do
input << "password\n"
input.rewind
answer = reader.read_line(echo: false)
expect(answer).to eq("password\n")
expect(output.string).to eq("\n")
end
it "displays a prompt before input" do
input << "aa\n"
input.rewind
answer = reader.read_line(">> ")
expect(answer).to eq("aa\n")
expect(output.string).to eq([
">> ",
"\e[2K\e[1G>> a",
"\e[2K\e[1G>> aa",
"\e[2K\e[1G>> aa\n"
].join)
end
it "displays custom input with a prompt" do
input << "aa\n"
input.rewind
answer = reader.read_line("> ", value: "xx")
expect(answer).to eq("xxaa\n")
expect(output.string).to eq([
"> xx",
"\e[2K\e[1G> xxa",
"\e[2K\e[1G> xxaa",
"\e[2K\e[1G> xxaa\n"
].join)
end
it "deletes characters when backspace pressed" do
input << "aa\ba\bcc\n"
input.rewind
answer = reader.read_line
expect(answer).to eq("acc\n")
end
it "reads multibyte line" do
input << "한글"
input.rewind
answer = reader.read_line
expect(answer).to eq("한글")
end
it "supports multiline prompts" do
allow(TTY::Screen).to receive(:width).and_return(50)
prompt = "one\ntwo\nthree"
input << "aa\n"
input.rewind
answer = reader.read_line(prompt)
expect(answer).to eq("aa\n")
expect(output.string).to eq([
prompt,
"\e[2K\e[1G\e[1A" * 2,
"\e[2K\e[1G",
prompt + "a",
"\e[2K\e[1G\e[1A" * 2,
"\e[2K\e[1G",
prompt + "aa",
"\e[2K\e[1G\e[1A" * 2,
"\e[2K\e[1G",
prompt + "aa\n"
].join)
end
it "restores empty line when history has no more lines" do
input << "ab\ncd\n\e[A\e[A\e[B\e[B\n"
input.rewind
chars = []
lines = []
answer = nil
reader.on(:keypress) do |event|
chars << event.value
lines << event.line
end
3.times do
answer = reader.read_line
end
expect(chars).to eq(%W(a b \n c d \n \e[A \e[A \e[B \e[B \n))
expect(lines).to eq(%W(a ab ab\n c cd cd\n cd ab cd #{''} \n))
expect(answer).to eq("\n")
end
it "buffers non-empty input and restores it back when history has no more lines" do
input << "ab\ncd\e[A\e[B\n"
input.rewind
chars = []
lines = []
reader.on(:keypress) do |event|
chars << event.value
lines << event.line
end
reader.read_line
answer = reader.read_line
expect(chars).to eq(%W(a b \n c d \e[A \e[B \n))
expect(lines).to eq(%W(a ab ab\n c cd ab cd cd\n))
expect(answer).to eq("cd\n")
end
end
|
