From 9af1e223afc38a8bc0c93b0f48c42afcb1cc2406 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Tue, 31 Mar 2020 15:52:29 +0200
Subject: [PATCH] More tests and docs for extent and coordinate wrapX

---
 src/ol/coordinate.js        | 3 ++-
 test/spec/ol/extent.test.js | 6 ++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/ol/coordinate.js b/src/ol/coordinate.js
index 79d196a911..563ff1bf64 100644
--- a/src/ol/coordinate.js
+++ b/src/ol/coordinate.js
@@ -407,7 +407,8 @@ export function toStringXY(coordinate, opt_fractionDigits) {
 
 /**
  * Modifies the provided coordinate in-place to be within the real world
- * extent.
+ * extent. The lower projection extent boundary is inclusive, the upper one
+ * exclusive.
  *
  * @param {Coordinate} coordinate Coordinate.
  * @param {import("./proj/Projection.js").default} projection Projection
diff --git a/test/spec/ol/extent.test.js b/test/spec/ol/extent.test.js
index ba971781da..cc9011175a 100644
--- a/test/spec/ol/extent.test.js
+++ b/test/spec/ol/extent.test.js
@@ -849,6 +849,12 @@ describe('ol.extent', function() {
       expect(_ol_extent_.wrapX([300, 48, 376, 49], projection)).to.eql([-60, 48, 16, 49]);
     });
 
+    it('produces the same real world extent for shifted extents with center at +/-180', function() {
+      expect(_ol_extent_.wrapX([360, -90, 720, 90], projection)).to.eql([-360, -90, 0, 90]);
+      expect(_ol_extent_.wrapX([0, -90, 360, 90], projection)).to.eql([-360, -90, 0, 90]);
+      expect(_ol_extent_.wrapX([-360, -90, 0, 90], projection)).to.eql([-360, -90, 0, 90]);
+    });
+
   });
 
   describe('approximatelyEquals', function() {