test: compare coordinates at the configured precision

assert_equal_coordinates used DEFAULT_GEOJSON_PRECISION; use
RedmineGtt.geojson_precision so the comparison follows the live setting and
stays correct if a test changes it.

Author: dkastl

test/test_helper.rb

@@ -44,11 +44,12 @@ def assert_geojson(json)
   end
 
   def assert_equal_coordinates(a, b)
-    # Compare at the precision GeoJSON output is rounded to. Comparing at a
-    # lower precision than the output uses would double-round boundary values
-    # (e.g. 135.2528349 -> round(6) 135.252835 -> round(5) 135.25284, while a
-    # direct round(5) gives 135.25283).
-    precision = RedmineGtt::DEFAULT_GEOJSON_PRECISION
+    # Compare at the precision GeoJSON output is actually rounded to (follows
+    # the configured setting, so it stays correct if a test changes it).
+    # Comparing at a lower precision than the output uses would double-round
+    # boundary values (e.g. 135.2528349 -> round(6) 135.252835 -> round(5)
+    # 135.25284, while a direct round(5) gives 135.25283).
+    precision = RedmineGtt.geojson_precision
     assert_equal a.flatten.map{|f|f.round precision}, b.flatten.map{|f|f.round precision}
   end