surface tests

1 files changed, 19 insertions, 0 deletions

diff --git a/test/01-test-vec2.js b/test/01-test-vec2.js
index 6104f92..429c537 100644
--- a/test/01-test-vec2.js
+++ b/test/01-test-vec2.js
@@ -37,6 +37,25 @@ describe('vec2', function(){
     })
   })
 
+  describe('#intersection()', function(){
+    it('intersects from left', function(){
+      var inter = vec.intersection( new vec2( 5, 15 ) )
+      assert.equal(true, inter.eq( new vec2(5, 10) ))
+    })
+    it('intersects from right', function(){
+      var inter = vec.intersection( new vec2( -5, 5 ) )
+      assert.equal(true, inter.eq( new vec2(0, 5) ))
+    })
+    it('intersects inner', function(){
+      var inter = vec.intersection( new vec2( 2, 5 ) )
+      assert.equal(true, inter.eq( new vec2(2, 5) ))
+    })
+    it('intersects outer', function(){
+      var inter = vec.intersection( new vec2( -5, 15 ) )
+      assert.equal(true, inter.eq( new vec2(0, 10) ))
+    })
+  })
+
   describe('#contains()', function(){
     it('contains itself', function(){
       assert.equal(true, vec.contains( 0 ));