tests: Add check for handling of wide data (16 probes)

The details of the test are explained in-source. This test is designed to
provide a test case for bug 33.

Signed-off-by: Alexandru Gagniuc <redacted>

diff --git a/test/data/logicsnapshot.cpp b/test/data/logicsnapshot.cpp
index 1c536791b7a3f746a9ae621cc39c62553b21fae7..951e3845b1d5651d2c739bbf88d35261965b9477 100644 (file)
--- a/test/data/logicsnapshot.cpp
+++ b/test/data/logicsnapshot.cpp
@@ -471,5 +471,42 @@ BOOST_AUTO_TEST_CASE(LisaMUsbHid)
        BOOST_CHECK_EQUAL(edges[edges.size() - 2].second, false);
 }
 
+/*
+ * This test checks the rendering of wide data (more than 8 probes)
+ * Probe signals are either all-high, or all-low, but are interleaved such that
+ * they would toggle during every sample if treated like 8 probes.
+ * The packet contains a large number of samples, so the mipmap generation kicks
+ * in.
+ *
+ * The signals should not toggle (have exactly two edges: the start and end)
+ */
+BOOST_AUTO_TEST_CASE(WideData)
+{
+       const int Length = 512<<10;
+       uint16_t *data = new uint16_t[Length];
+
+       sr_datafeed_logic logic;
+       logic.unitsize = sizeof(data[0]);
+       logic.length = Length * sizeof(data[0]);
+       logic.data = data;
+
+       for(int i = 0; i < Length; i++)
+               data[i] = 0x0FF0;
+
+       LogicSnapshot s(logic);
+
+       vector<LogicSnapshot::EdgePair> edges;
+
+       edges.clear();
+       s.get_subsampled_edges(edges, 0, Length-1, 1, 0);
+       BOOST_CHECK_EQUAL(edges.size(), 2);
+
+       edges.clear();
+       s.get_subsampled_edges(edges, 0, Length-1, 1, 8);
+       BOOST_CHECK_EQUAL(edges.size(), 2);
+
+       // Cleanup
+       delete [] data;
+}
 
 BOOST_AUTO_TEST_SUITE_END()