1 files changed, 92 insertions, 0 deletions
diff --git a/src/test/scala/sims/test/LinearOverlapTest.scala b/src/test/scala/sims/test/LinearOverlapTest.scala
new file mode 100644
index 0000000..aa99f6f
--- /dev/null
+++ b/src/test/scala/sims/test/LinearOverlapTest.scala
@@ -0,0 +1,92 @@
+package sims.test
+
+import org.scalatest.FlatSpec
+import org.scalatest.matchers.ShouldMatchers
+
+import sims.math._
+import sims.collision._
+
+class LinearOverlapTest extends FlatSpec with ShouldMatchers {
+	
+	"A segment" should "throw IllegalArgumentException if both of its " +
+	"vertices degenerate into a single one" in {
+		evaluating { val s1 = Segment(Vector2D(0,0), Vector2D(0,0)) } should produce [IllegalArgumentException]
+	}
+	
+	it should "not intersect with itself" in {
+		val s1 = Segment(Vector2D(2, 2), Vector2D(3, 5))
+		s1 intersection s1 should equal (None)
+	}
+	
+	"Two segments" should "have an intersection point if they intersect" in {
+		val s1 = Segment(Vector2D(0, 0), Vector2D(3, 1))
+		val s2 = Segment(Vector2D(0, 1), Vector2D(3, -2))
+		s1 intersection s2 should not equal (None)
+	}
+	
+	it should "have an intersection point if they share a vertice" in {
+		val s1 = Segment(Vector2D(1, 2), Vector2D(3, 1))
+		val s2 = Segment(Vector2D(3, 1), Vector2D(3, -2))
+		s1 intersection s2 should not equal (None)
+	}
+	
+	it should "have an intersection point if one contains one of the other's vertices" in {
+		val s1 = Segment(Vector2D(2, 4), Vector2D(3, 100))
+		val s2 = Segment(Vector2D(1, 3), Vector2D(3, 5))
+		s1 intersection s2 should not equal (None)
+	}
+	
+	it should "not have an intersection point if they are parallel" in {
+		val s1 = Segment(Vector2D(0, 0), Vector2D(3, 1))
+		val s2 = Segment(Vector2D(0, 1), Vector2D(3, 2))
+		s1 intersection s2 should equal (None)
+	}
+		
+	it should "not have an intersection point if they are parallel and lie on each other" in {
+		val s1 = Segment(Vector2D(2, 2), Vector2D(6, 6))
+		val s2 = Segment(Vector2D(3, 3), Vector2D(4, 4))
+		s1 intersection s2 should equal (None)
+	}
+	
+	
+	"A ray and a segment" should "have an intersection point if they intersect" in {
+		val r1 = Ray(Vector2D(3, 5), Vector2D(3, -1))
+		val s1 = Segment(Vector2D(6.32, math.sqrt(4.0)), Vector2D(10, 15.5))
+		r1 intersection s1 should not equal (None)
+	}
+	
+	it should "have an intersection point if they share a vertice" in {
+		val r1 = Ray(Vector2D(3, 4), Vector2D(2, 1))
+		val s1 = Segment(Vector2D(0, 10), Vector2D(3, 4))
+		r1 intersection s1 should not equal (None)
+	}
+	
+	it should "have an intersection point if the ray contains one of the segment's vertices" in {
+		val r1 = Ray(Vector2D(0, 0), Vector2D(1, 2))
+		val s1 = Segment(Vector2D(2, 4), Vector2D(5, 4))
+		r1 intersection s1 should not equal (None)
+	}
+	
+	it should "have an intersection point if the segment contains the ray's vertice" in {
+		val r1 = Ray(Vector2D(0, math.Pi), Vector2D(1, 2))
+		val s1 = Segment(Vector2D(0, 0), Vector2D(0, 4))
+		r1 intersection s1 should not equal (None)
+		
+		val r2 = Ray(Vector2D(2, 3), Vector2D(-2, -1))
+		val s2 = Segment(Vector2D(0, 4), Vector2D(4, 2))
+		r2 intersection s2 should not equal (None)
+	}
+	
+	it should "not have an intersection point if they are parallel" in {
+		val r1 = Ray(Vector2D(2, 3), Vector2D(3, 4))
+		val s1 = Segment(Vector2D(1, 4), Vector2D(4, 8))
+		r1 intersection s1 should equal (None)
+	}
+	
+	it should "not have an intersection point if they lie on each other" in {
+		val r1 = Ray(Vector2D(0, 1), Vector2D(2, 3))
+		val s1 = Segment(Vector2D(-1, 0), Vector2D(4, 4))
+		r1 intersection s1 should equal (None)
+	}
+	
+}
+\ No newline at end of file