add tests for Has() and End()

README.md

@@ -22,6 +22,10 @@ Please note that Cascadia's selectors do NOT necessarily match all supported sel
 
 [Reference documentation can be found here][doc].
 
+## Examples
+
+TODO...
+
 ## License
 
 The [BSD 3-Clause license][bsd], the same as the [Go language][golic]. Cascadia's license is [here][caslic].

filter_test.go

@@ -91,3 +91,44 @@ func TestUnion(t *testing.T) {
 		t.Errorf("Expected 6 nodes, found %v.", len(sel2.Nodes))
 	}
 }
+
+func TestHas(t *testing.T) {
+	sel := Doc().Find(".container-fluid").Has(".center-content")
+	if len(sel.Nodes) != 2 {
+		t.Errorf("Expected 2 nodes, found %v.", len(sel.Nodes))
+	}
+	// Has() returns the high-level .container-fluid div, and the one that is the immediate parent of center-content
+}
+
+func TestHasNodes(t *testing.T) {
+	sel := Doc().Find(".container-fluid")
+	sel2 := Doc().Find(".center-content")
+	sel = sel.HasNodes(sel2.Nodes...)
+	if len(sel.Nodes) != 2 {
+		t.Errorf("Expected 2 nodes, found %v.", len(sel.Nodes))
+	}
+	// Has() returns the high-level .container-fluid div, and the one that is the immediate parent of center-content
+}
+
+func TestHasSelection(t *testing.T) {
+	sel := Doc().Find("p")
+	sel2 := Doc().Find("small")
+	sel = sel.HasSelection(sel2)
+	if len(sel.Nodes) != 1 {
+		t.Errorf("Expected 1 node, found %v.", len(sel.Nodes))
+	}
+}
+
+func TestEnd(t *testing.T) {
+	sel := Doc().Find("p").Has("small").End()
+	if len(sel.Nodes) != 4 {
+		t.Errorf("Expected 4 nodes, found %v.", len(sel.Nodes))
+	}
+}
+
+func TestEndToTop(t *testing.T) {
+	sel := Doc().Find("p").Has("small").End().End()
+	if len(sel.Nodes) != 0 {
+		t.Errorf("Expected 0 node, found %v.", len(sel.Nodes))
+	}
+}