103 lines
3.0 KiB
Ruby
103 lines
3.0 KiB
Ruby
# frozen_string_literal: true
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require "utils/popen"
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describe Utils do
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describe "::popen_read" do
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it "reads the standard output of a given command" do
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expect(described_class.popen_read("sh", "-c", "echo success").chomp).to eq("success")
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expect($CHILD_STATUS).to be_a_success
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end
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it "can be given a block to manually read from the pipe" do
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expect(
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described_class.popen_read("sh", "-c", "echo success") do |pipe|
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pipe.read.chomp
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end,
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).to eq("success")
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expect($CHILD_STATUS).to be_a_success
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end
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it "fails when the command does not exist" do
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expect(described_class.popen_read("./nonexistent", err: :out))
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.to eq("brew: command not found: ./nonexistent\n")
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expect($CHILD_STATUS).to be_a_failure
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end
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end
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describe "::popen_write" do
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let(:foo) { mktmpdir/"foo" }
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before { foo.write "Foo\n" }
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it "supports writing to a command's standard input" do
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described_class.popen_write("grep", "-q", "success") do |pipe|
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pipe.write "success\n"
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end
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expect($CHILD_STATUS).to be_a_success
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end
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it "returns the command's standard output before writing" do
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child_stdout = described_class.popen_write("cat", foo, "-") do |pipe|
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pipe.write "Bar\n"
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end
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expect($CHILD_STATUS).to be_a_success
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expect(child_stdout).to eq <<~EOS
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Foo
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Bar
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EOS
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end
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it "returns the command's standard output after writing" do
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child_stdout = described_class.popen_write("cat", "-", foo) do |pipe|
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pipe.write "Bar\n"
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end
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expect($CHILD_STATUS).to be_a_success
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expect(child_stdout).to eq <<~EOS
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Bar
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Foo
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EOS
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end
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it "supports interleaved writing between two reads" do
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child_stdout = described_class.popen_write("cat", foo, "-", foo) do |pipe|
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pipe.write "Bar\n"
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end
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expect($CHILD_STATUS).to be_a_success
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expect(child_stdout).to eq <<~EOS
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Foo
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Bar
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Foo
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EOS
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end
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end
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describe "::safe_popen_read" do
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it "does not raise an error if the command succeeds" do
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expect(described_class.safe_popen_read("sh", "-c", "true")).to eq("")
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expect($CHILD_STATUS).to be_a_success
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end
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it "raises an error if the command fails" do
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expect { described_class.safe_popen_read("sh", "-c", "false") }.to raise_error(ErrorDuringExecution)
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expect($CHILD_STATUS).to be_a_failure
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end
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end
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describe "::safe_popen_write" do
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it "does not raise an error if the command succeeds" do
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expect(
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described_class.safe_popen_write("grep", "success") { |pipe| pipe.write "success\n" }.chomp,
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).to eq("success")
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expect($CHILD_STATUS).to be_a_success
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end
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it "raises an error if the command fails" do
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expect do
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described_class.safe_popen_write("grep", "success") { |pipe| pipe.write "failure\n" }
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end.to raise_error(ErrorDuringExecution)
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expect($CHILD_STATUS).to be_a_failure
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end
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end
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end
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