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| 1 | +require "spec_helper" |
| 2 | + |
| 3 | +describe Rdkafka::Producer::Client do |
| 4 | + let(:native) { double } |
| 5 | + let(:closing) { false } |
| 6 | + let(:thread) { double(Thread) } |
| 7 | + |
| 8 | + subject(:client) { described_class.new(native) } |
| 9 | + |
| 10 | + before do |
| 11 | + allow(Rdkafka::Bindings).to receive(:rd_kafka_poll).with(native, 250) |
| 12 | + allow(Rdkafka::Bindings).to receive(:rd_kafka_outq_len).with(native).and_return(0) |
| 13 | + allow(Rdkafka::Bindings).to receive(:rd_kafka_destroy) |
| 14 | + allow(Thread).to receive(:new).and_return(thread) |
| 15 | + |
| 16 | + allow(thread).to receive(:[]=).with(:closing, anything) |
| 17 | + allow(thread).to receive(:join) |
| 18 | + allow(thread).to receive(:abort_on_exception=).with(anything) |
| 19 | + end |
| 20 | + |
| 21 | + context "defaults" do |
| 22 | + it "sets the thread to abort on exception" do |
| 23 | + expect(thread).to receive(:abort_on_exception=).with(true) |
| 24 | + |
| 25 | + client |
| 26 | + end |
| 27 | + |
| 28 | + it "sets the thread `closing` flag to false" do |
| 29 | + expect(thread).to receive(:[]=).with(:closing, false) |
| 30 | + |
| 31 | + client |
| 32 | + end |
| 33 | + end |
| 34 | + |
| 35 | + context "the polling thread" do |
| 36 | + it "is created" do |
| 37 | + expect(Thread).to receive(:new) |
| 38 | + |
| 39 | + client |
| 40 | + end |
| 41 | + |
| 42 | + it "polls the native with default 250ms timeout" do |
| 43 | + polling_loop_expects do |
| 44 | + expect(Rdkafka::Bindings).to receive(:rd_kafka_poll).with(native, 250) |
| 45 | + end |
| 46 | + end |
| 47 | + |
| 48 | + it "check the out queue of native client" do |
| 49 | + polling_loop_expects do |
| 50 | + expect(Rdkafka::Bindings).to receive(:rd_kafka_outq_len).with(native) |
| 51 | + end |
| 52 | + end |
| 53 | + end |
| 54 | + |
| 55 | + def polling_loop_expects(&block) |
| 56 | + Thread.current[:closing] = true # this forces the loop break with line #12 |
| 57 | + |
| 58 | + allow(Thread).to receive(:new).and_yield do |_| |
| 59 | + block.call |
| 60 | + end.and_return(thread) |
| 61 | + |
| 62 | + client |
| 63 | + end |
| 64 | + |
| 65 | + it "exposes `native` client" do |
| 66 | + expect(client.native).to eq(native) |
| 67 | + end |
| 68 | + |
| 69 | + context "when client was not yet closed (`nil`)" do |
| 70 | + it "is not closed" do |
| 71 | + expect(client.closed?).to eq(false) |
| 72 | + end |
| 73 | + |
| 74 | + context "and attempt to close" do |
| 75 | + it "calls the `destroy` binding" do |
| 76 | + expect(Rdkafka::Bindings).to receive(:rd_kafka_destroy).with(native) |
| 77 | + |
| 78 | + client.close |
| 79 | + end |
| 80 | + |
| 81 | + it "indicates to the polling thread that it is closing" do |
| 82 | + expect(thread).to receive(:[]=).with(:closing, true) |
| 83 | + |
| 84 | + client.close |
| 85 | + end |
| 86 | + |
| 87 | + it "joins the polling thread" do |
| 88 | + expect(thread).to receive(:join) |
| 89 | + |
| 90 | + client.close |
| 91 | + end |
| 92 | + |
| 93 | + it "closes and unassign the native client" do |
| 94 | + client.close |
| 95 | + |
| 96 | + expect(client.native).to eq(nil) |
| 97 | + expect(client.closed?).to eq(true) |
| 98 | + end |
| 99 | + end |
| 100 | + end |
| 101 | + |
| 102 | + context "when client was already closed" do |
| 103 | + before { client.close } |
| 104 | + |
| 105 | + it "is closed" do |
| 106 | + expect(client.closed?).to eq(true) |
| 107 | + end |
| 108 | + |
| 109 | + context "and attempt to close again" do |
| 110 | + it "does not call the `destroy` binding" do |
| 111 | + expect(Rdkafka::Bindings).not_to receive(:rd_kafka_destroy) |
| 112 | + |
| 113 | + client.close |
| 114 | + end |
| 115 | + |
| 116 | + it "does not indicate to the polling thread that it is closing" do |
| 117 | + expect(thread).not_to receive(:[]=).with(:closing, true) |
| 118 | + |
| 119 | + client.close |
| 120 | + end |
| 121 | + |
| 122 | + it "does not join the polling thread" do |
| 123 | + expect(thread).not_to receive(:join) |
| 124 | + |
| 125 | + client.close |
| 126 | + end |
| 127 | + |
| 128 | + it "does not close and unassign the native client again" do |
| 129 | + client.close |
| 130 | + |
| 131 | + expect(client.native).to eq(nil) |
| 132 | + expect(client.closed?).to eq(true) |
| 133 | + end |
| 134 | + end |
| 135 | + end |
| 136 | + |
| 137 | + it "provide a finalizer Proc that closes the `native` client" do |
| 138 | + expect(client.closed?).to eq(false) |
| 139 | + |
| 140 | + client.finalizer.call("some-ignored-object-id") |
| 141 | + |
| 142 | + expect(client.closed?).to eq(true) |
| 143 | + end |
| 144 | +end |
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