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require "utils/popen"
describe Utils do
describe "::popen_read" do
it "reads the standard output of a given command" do
expect(subject.popen_read("sh", "-c", "echo success").chomp).to eq("success")
expect($CHILD_STATUS).to be_a_success
end
it "can be given a block to manually read from the pipe" do
expect(
subject.popen_read("sh", "-c", "echo success") do |pipe|
pipe.read.chomp
end,
).to eq("success")
expect($CHILD_STATUS).to be_a_success
end
it "fails when the command does not exist" do
expect(subject.popen_read("./nonexistent", err: :out))
.to eq("brew: command not found: ./nonexistent\n")
expect($CHILD_STATUS).to be_a_failure
end
end
describe "::popen_write" do
it "with supports writing to a command's standard input" do
subject.popen_write("grep", "-q", "success") do |pipe|
pipe.write("success\n")
end
expect($CHILD_STATUS).to be_a_success
end
end
end
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