Add failing test for straightLineIntersect

Although the two lines share a vertex, maths precision in the calculation means that the intersection isn't detected.
davecraig · Jan 9, 2025 · 4aac154 · 4aac154
1 parent 32b923d
commit 4aac154
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diff --git a/app/src/main/java/org/scottishtecharmy/soundscape/geoengine/utils/IntersectionUtils.kt b/app/src/main/java/org/scottishtecharmy/soundscape/geoengine/utils/IntersectionUtils.kt
@@ -0,0 +1,2 @@
+package org.scottishtecharmy.soundscape.geoengine.utils
+
diff --git a/app/src/test/java/org/scottishtecharmy/soundscape/GeoUtilsTest.kt b/app/src/test/java/org/scottishtecharmy/soundscape/GeoUtilsTest.kt
@@ -669,6 +669,15 @@ class GeoUtilsTest {
         // These linestrings do not intersect
         val intersect2 = lineStringsIntersect(lineString1, lineString3)
         Assert.assertEquals(false, intersect2)
+
+        // These linestrings do intersect - they share a vertex
+        val intersect3 = straightLinesIntersect(
+            LngLatAlt(-4.305750131607056,55.947229354934144),
+            LngLatAlt(-4.30576890707016,55.947257891396816),
+            LngLatAlt(-4.306174131587852,55.946848076693094),
+            LngLatAlt(-4.305750131607056,55.947229354934144)
+        )
+        Assert.assertEquals(true, intersect3)
     }
 
     @Test
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		package org.scottishtecharmy.soundscape.geoengine.utils