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require "./spec/cases/helper"
describe "helpers" do
describe "#with_env" do
it "changes env" do
with_env A: "b" do
_(ENV["A"]).must_equal "b"
end
end
it "restores env" do
ENV["A"] = "c"
with_env A: "b" do
ENV["B"] = "a"
_(ENV["A"]).must_equal "b"
end
_(ENV["A"]).must_equal "c"
_(ENV["B"]).must_be_nil
end
end
describe ".with_env" do
with_env A: "a"
it "sets env" do
_(ENV["A"]).must_equal "a"
end
end
describe "#capture_stdout" do
it "keeps stdout" do
_(capture_stdout { puts "X" }).must_equal "X\n"
end
it "lets stderr through" do
out, err = capture_io { capture_stdout { warn "X" } }
_(out).must_equal ""
_(err).must_equal "X\n"
end
end
describe "#capture_stderr" do
it "keeps stderr" do
_(capture_stderr { warn "X" }).must_equal "X\n"
end
it "lets stdout through" do
out, err = capture_io { capture_stderr { puts "X" } }
_(out).must_equal "X\n"
_(err).must_equal ""
end
end
end
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