From c001ba176f7e199ee6276581e8c668ef8b5b4b2b Mon Sep 17 00:00:00 2001
From: Ryan Friedman <ryanfriedman5410+github@gmail.com>
Date: Sat, 27 Apr 2024 22:05:12 -0600
Subject: [PATCH] Convert to use a local VRT file

* Add a VRT test file
* Add a zipped VRT test file
* Don't rely on internet for tests to pass

Signed-off-by: Ryan Friedman <ryanfriedman5410+github@gmail.com>
---
 geospatial/src/Dem_TEST.cc |     24 +-
 test/data/ap_srtm1.vrt     | 191983 ++++++++++++++++++++++++++++++++++
 test/data/ap_srtm1.zip     |    Bin 0 -> 239527 bytes
 3 files changed, 192001 insertions(+), 6 deletions(-)
 create mode 100644 test/data/ap_srtm1.vrt
 create mode 100644 test/data/ap_srtm1.zip

diff --git a/geospatial/src/Dem_TEST.cc b/geospatial/src/Dem_TEST.cc
index 38c28647..55d838af 100644
--- a/geospatial/src/Dem_TEST.cc
+++ b/geospatial/src/Dem_TEST.cc
@@ -283,21 +283,33 @@ TEST_F(DemTest, LunarDemLoad)
   EXPECT_NEAR(dem.WorldHeight(), 80.0417, 1e-2);
 }
 
-TEST_F(DemTest, LargeVRTWithZipAndCurl)
+TEST_F(DemTest, LargeVRTWithLimits)
 {
-  // Load a large VRT DEM from another server (used by ArduPilot).
+  // Load a large VRT DEM using GDAL but set limits on the size.
   common::Dem dem;
   dem.SetXSizeLimit(100);
   dem.SetYSizeLimit(50);
-  //! @todo Make a really large VRT locally
-  auto const res = dem.Load("/vsizip/vsicurl/https://terrain.ardupilot.org/SRTM1/ap_srtm1.zip/ap_srtm1.vrt");
+  auto const path = common::testing::TestFile("data", "ap_srtm1.vrt");
+  auto const res = dem.Load(path);
+  EXPECT_EQ(res, 0);
+}
+
+TEST_F(DemTest, LargeVRTWithVSIZIPAndLimits)
+{
+  // Load a large vzizip VRT DEM using GDAL but set limits on the size.
+  common::Dem dem;
+  dem.SetXSizeLimit(100);
+  dem.SetYSizeLimit(50);
+  auto const path = common::testing::TestFile("data", "ap_srtm1.zip");
+  auto const res = dem.Load("/vsizip/" + path + "/ap_srtm1.vrt");
   EXPECT_EQ(res, 0);
 }
 
 TEST_F(DemTest, LargeVRTWithoutLimitsThrows)
 {
-  // Load a large VRT DEM from another server (used by ArduPilot).
+  // Load a large VRT DEM without limits.
   common::Dem dem;
+  auto const path = common::testing::TestFile("data", "ap_srtm1.vrt");
   // We expect not to be able to allocate the data, so ensure we throw instead of segfault.
-  EXPECT_THROW(dem.Load("/vsizip/vsicurl/https://terrain.ardupilot.org/SRTM1/ap_srtm1.zip/ap_srtm1.vrt"), std::bad_alloc);
+  EXPECT_THROW(dem.Load(path), std::bad_alloc);
 }
\ No newline at end of file
diff --git a/test/data/ap_srtm1.vrt b/test/data/ap_srtm1.vrt
new file mode 100644
index 00000000..bf1bddce
--- /dev/null
+++ b/test/data/ap_srtm1.vrt
@@ -0,0 +1,191983 @@
+<VRTDataset rasterXSize="1296001" rasterYSize="604801">
+  <SRS dataAxisToSRSAxisMapping="2,1">GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AXIS["Latitude",NORTH],AXIS["Longitude",EAST],AUTHORITY["EPSG","4326"]]</SRS>
+  <GeoTransform> -1.8000013888888890e+02,  2.7777777777781730e-04,  0.0000000000000000e+00,  8.4000138888888884e+01,  0.0000000000000000e+00, -2.7777777777781730e-04</GeoTransform>
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