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# frozen_string_literal: true
RSpec.describe TTY::Reader, "#read_multiline" 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 "reads no lines" do
input << "\C-d"
input.rewind
answer = reader.read_multiline
expect(answer).to eq([])
end
it "reads a line and terminates on Ctrl+d" do
input << "Single line\C-d"
input.rewind
answer = reader.read_multiline
expect(answer).to eq(["Single line"])
end
it "reads a line and terminates on Ctrl+z" do
input << "Single line\C-z"
input.rewind
answer = reader.read_multiline
expect(answer).to eq(["Single line"])
end
it "reads few lines" do
input << "First line\nSecond line\nThird line\n\C-d"
input.rewind
answer = reader.read_multiline
expect(answer).to eq(["First line\n", "Second line\n", "Third line\n"])
end
it "skips empty lines" do
input << "\n\nFirst line\n\n\n\n\nSecond line\C-d"
input.rewind
answer = reader.read_multiline
expect(answer).to eq(["First line\n", "Second line"])
end
it "reads and yiels every line" do
input << "First line\nSecond line\nThird line\C-z"
input.rewind
lines = []
reader.read_multiline { |line| lines << line }
expect(lines).to eq(["First line\n", "Second line\n", "Third line"])
end
it "reads multibyte lines" do
input << "국경의 긴 터널을 빠져나오자\n설국이었다.\C-d"
input.rewind
lines = reader.read_multiline
expect(lines).to eq(["국경의 긴 터널을 빠져나오자\n", "설국이었다."])
end
it "reads lines with a prompt" do
input << "1\n2\n3\C-d"
input.rewind
lines = reader.read_multiline(">> ")
expect(lines).to eq(["1\n", "2\n", "3"])
expect(output.string).to eq([
">> ",
"\e[2K\e[1G>> 1",
"\e[2K\e[1G>> 1\n",
">> ",
"\e[2K\e[1G>> 2",
"\e[2K\e[1G>> 2\n",
">> ",
"\e[2K\e[1G>> 3",
].join)
end
it "reads lines with echo off" do
input << "1\n2\n3\n"
input.rewind
lines = reader.read_multiline(echo: false)
expect(lines).to eq(["1\n", "2\n", "3\n"])
expect(output.string).to eq("\n\n\n")
end
it "sets initial input line" do
input << "aa\nbb\n"
input.rewind
lines = reader.read_multiline("> ", value: "xx")
expect(lines).to eq(["xxaa\n", "bb\n"])
expect(output.string).to eq([
"> xx",
"\e[2K\e[1G> xxa",
"\e[2K\e[1G> xxaa",
"\e[2K\e[1G> xxaa\n",
"> ",
"\e[2K\e[1G> b",
"\e[2K\e[1G> bb",
"\e[2K\e[1G> bb\n",
"> "
].join)
end
end
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