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zeekay
abf99d05fc
Restructured from flat .tex/.pdf files into per-paper subdirectories. Added Antje Worring as co-author on all papers. Synced PDFs to pdfs/ for download site.
44 lines
1.4 KiB
TeX
44 lines
1.4 KiB
TeX
\section{Layer 2: Integration Tests}
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Integration tests verify that components work together. The key difference from unit
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tests: multiple components are instantiated (but not the full system).
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\begin{lstlisting}[language=Go,caption={Integration test for consensus + networking}]
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func TestConsensusWithNetworkDelay(t *testing.T) {
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// Create 4 validators with simulated network
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net := newTestNetwork(4)
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// Add latency: 50ms per message
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net.SetLatency(50 * time.Millisecond)
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// Propose a block
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net.Validators[0].Propose(testBlock)
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// Wait for consensus
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for _, v := range net.Validators {
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select {
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case decision := <-v.Decisions():
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require.Equal(t, testBlock.Hash(), decision.Hash())
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case <-time.After(5 * time.Second):
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t.Fatal("consensus did not complete within 5s")
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}
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}
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}
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\end{lstlisting}
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\subsection{Simulated Network}
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Our integration test framework includes a simulated network that supports:
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\begin{itemize}[nosep]
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\item Configurable latency per link.
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\item Message reordering.
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\item Message loss (configurable drop rate).
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\item Partitions (disconnect a subset of nodes from the rest).
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\end{itemize}
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This is not full Jepsen-style testing (that uses real processes)---it is deterministic
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simulation that runs in milliseconds.
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%% ============================================================
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