reorganize positional methods in array.go, tests.

array_test.go

@@ -0,0 +1,68 @@
+package goquery
+
+import (
+	"testing"
+)
+
+func TestFirst(t *testing.T) {
+	sel := doc.Find(".pvk-content").First()
+	if len(sel.Nodes) != 1 {
+		t.Errorf("Expected 1 node, found %v.", len(sel.Nodes))
+	}
+}
+
+func TestFirstEmpty(t *testing.T) {
+	defer func() {
+		if e := recover(); e == nil {
+			t.Error("Expected a panic, First() called on empty Selection.")
+		}
+	}()
+	doc.Find(".pvk-zzcontentzz").First()
+}
+
+func TestLast(t *testing.T) {
+	sel := doc.Find(".pvk-content").Last()
+	if len(sel.Nodes) != 1 {
+		t.Errorf("Expected 1 node, found %v.", len(sel.Nodes))
+	}
+	// Should contain Footer
+	foot := doc.Find(".footer")
+	if !sel.Contains(foot.Nodes[0]) {
+		t.Error("Last .pvk-content should contain .footer.")
+	}
+}
+
+func TestEq(t *testing.T) {
+	sel := doc.Find(".pvk-content").Eq(1)
+	if len(sel.Nodes) != 1 {
+		t.Errorf("Expected 1 node, found %v.", len(sel.Nodes))
+	}
+}
+
+func TestEqNegative(t *testing.T) {
+	sel := doc.Find(".pvk-content").Eq(-1)
+	if len(sel.Nodes) != 1 {
+		t.Errorf("Expected 1 node, found %v.", len(sel.Nodes))
+	}
+	// Should contain Footer
+	foot := doc.Find(".footer")
+	if !sel.Contains(foot.Nodes[0]) {
+		t.Error("Index -1 of .pvk-content should contain .footer.")
+	}
+}
+
+func TestSlice(t *testing.T) {
+	sel := doc.Find(".pvk-content").Slice(0, 2)
+	if len(sel.Nodes) != 2 {
+		t.Errorf("Expected 2 nodes, found %v.", len(sel.Nodes))
+	}
+}
+
+func TestSliceOutOfBounds(t *testing.T) {
+	defer func() {
+		if e := recover(); e == nil {
+			t.Error("Expected a panic, Slice() called with out of bounds indices.")
+		}
+	}()
+	doc.Find(".pvk-content").Slice(2, 12)
+}