d61aa8a15c
Printing thread stack traces is useful when diagnosing issues with slow or non-termination, and we might have one of those issues on the web site. So, refactor the thread dumping code for reuse.
20 lines
707 B
Ruby
20 lines
707 B
Ruby
# frozen_string_literal: true
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RSpec.describe ThreadPrinter do
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describe "#print" do
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it "can dump threads" do
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expect(described_class).to receive(:puts).with(/Thread: #<Thread:.*>/)
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expect(described_class).to receive(:puts).with(/backtrace/)
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described_class.run
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end
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it "can handle threads with a nil backtrace" do
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# The documentation calls out that the backtrace is an array or
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# nil.
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expect(described_class).to receive(:puts).with(/Thread: #<InstanceDouble.*>/)
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expect(described_class).to receive(:puts).with(nil)
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expect(Thread).to receive(:list).and_return([instance_double(Thread, backtrace: nil)])
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described_class.run
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end
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end
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end
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