compare new GeoGcd with implementation as tensor distance

1 files changed, 5 insertions, 0 deletions

diff --git a/searchlib/src/tests/tensor/distance_functions/distance_functions_test.cpp b/searchlib/src/tests/tensor/distance_functions/distance_functions_test.cpp
index f0e156a96ed..7abc83b0047 100644
--- a/searchlib/src/tests/tensor/distance_functions/distance_functions_test.cpp
+++ b/searchlib/src/tests/tensor/distance_functions/distance_functions_test.cpp
@@ -1,6 +1,7 @@
 // Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
 
 #include <vespa/eval/eval/typed_cells.h>
+#include <vespa/searchlib/common/geo_gcd.h>
 #include <vespa/searchlib/tensor/distance_functions.h>
 #include <vespa/searchlib/tensor/distance_function_factory.h>
 #include <vespa/vespalib/gtest/gtest.h>
@@ -33,6 +34,10 @@ void verify_geo_miles(const DistanceFunction *dist_fun,
         EXPECT_LE(d_miles, exp_miles*1.01);
         double threshold = dist_fun->convert_threshold(km);
         EXPECT_DOUBLE_EQ(threshold, abstract_distance);
+        // compare with common Great Circle Distance implementation:
+        search::common::GeoGcd gp1{p1[0], p1[1]};
+        double km_gcd = gp1.km_great_circle_distance(p2[0], p2[1]);
+        EXPECT_DOUBLE_EQ(km, km_gcd);
     } else {
         EXPECT_LE(d_miles, 7e-13);
         EXPECT_LE(abstract_distance, 6e-33);