#1174 Added testcase

testdata/scad/3D/features/mirror-tests.scad

@@ -0,0 +1 @@
+render() mirror([1,0,0]) cube();

tests/CMakeLists.txt

@@ -1122,6 +1122,7 @@ list(APPEND EXPORT3D_TEST_FILES ${CMAKE_SOURCE_DIR}/../testdata/scad/3D/features
                                 ${CMAKE_SOURCE_DIR}/../testdata/scad/3D/features/polyhedron-tests.scad
                                 ${CMAKE_SOURCE_DIR}/../testdata/scad/3D/features/rotate_extrude-tests.scad
                                 ${CMAKE_SOURCE_DIR}/../testdata/scad/3D/features/union-coincident-test.scad
+                                ${CMAKE_SOURCE_DIR}/../testdata/scad/3D/features/mirror-tests.scad
                                 ${CMAKE_SOURCE_DIR}/../testdata/scad/misc/null-polygons.scad
                                 ${CMAKE_SOURCE_DIR}/../testdata/scad/misc/internal-cavity.scad
                                 ${CMAKE_SOURCE_DIR}/../testdata/scad/misc/internal-cavity-polyhedron.scad

tests/regression/dumptest/mirror-tests-expected.csg

@@ -0,0 +1,7 @@
+group() {
+	render(convexity = 1) {
+		multmatrix([[-1, 0, 0, 0], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]]) {
+			cube(size = [1, 1, 1], center = false);
+		}
+	}
+}