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Add ascii draw regression test for mid-trace measurements #5277

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Add ascii draw regression test for mid-trace measurements #5277

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250f7fd
Add ascii draw regression test for mid-trace measurements
VaggelisGian Aug 25, 2026
bda1830
Use raw string and clang-format off for ascii expectation
VaggelisGian Aug 25, 2026
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22 changes: 22 additions & 0 deletions unittests/nvqpp/integration/draw_tester.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -132,3 +132,25 @@ CUDAQ_TEST(LatexDrawTester, skipsNonGateInstructions) {

EXPECT_EQ(expected_str, cudaq::detail::getLaTeXString(trace));
}

CUDAQ_TEST(DrawTester, skipsNonGateInstructions) {
// Regression test: a measurement in the middle of the trace must not
// misalign the instruction indices used by the layers and the boxes.
cudaq::Trace trace;
trace.appendInstruction("h", {}, {}, {{2, 2}});
trace.appendMeasurement("mz", {{2, 2}});
trace.appendInstruction("x", {}, {}, {{2, 2}});

// clang-format off
const std::string expected_str = R"(
q0 : ──────────

q1 : ──────────
╭───╮╭───╮
q2 : ┤ h ├┤ x ├
╰───╯╰───╯
)";
// clang-format on

EXPECT_EQ(expected_str, cudaq::detail::draw(trace));
}