feat: add DeleteAtHead, DeleteAtTail, DeleteAt, Reverse, Size, GetMiddleNode funcs in singlelink

datastructure/singlylink_test.go

@@ -60,3 +60,106 @@ func TestSinglyLink_InsertAt(t *testing.T) {
 	assert.Equal(expected, values)
 
 }
+
+func TestSinglyLink_DeleteAtHead(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAtHead")
+
+	link := NewSinglyLink[int]()
+	err := link.DeleteAtHead()
+	assert.IsNotNil(err)
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.DeleteAtHead()
+	link.Print()
+
+	expected := []int{2, 3, 4}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestSinglyLink_DeleteAtTail(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAtTail")
+
+	link := NewSinglyLink[int]()
+	err := link.DeleteAtTail()
+	assert.IsNotNil(err)
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.DeleteAtTail()
+	link.Print()
+
+	expected := []int{1, 2, 3}
+	values := link.Values()
+
+	assert.Equal(expected, values)
+}
+
+func TestSinglyLink_DeleteAt(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_DeleteAt")
+
+	link := NewSinglyLink[int]()
+	err := link.DeleteAt(0)
+	assert.IsNotNil(err)
+
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+	link.InsertAtTail(5)
+
+	err = link.DeleteAt(5)
+	assert.IsNotNil(err)
+
+	err = link.DeleteAt(0)
+	assert.IsNil(err)
+	assert.Equal([]int{2, 3, 4, 5}, link.Values())
+
+	link.DeleteAt(3)
+	assert.Equal([]int{2, 3, 4}, link.Values())
+
+	link.DeleteAt(1)
+	assert.Equal(2, link.Size())
+	assert.Equal([]int{2, 4}, link.Values())
+}
+
+func TestSinglyLink_Reverse(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_Reverse")
+
+	link := NewSinglyLink[int]()
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	link.Reverse()
+	link.Print()
+	assert.Equal([]int{4, 3, 2, 1}, link.Values())
+}
+
+func TestSinglyLink_GetMiddleNode(t *testing.T) {
+	assert := internal.NewAssert(t, "TestSinglyLink_GetMiddleNode")
+
+	link := NewSinglyLink[int]()
+	link.InsertAtTail(1)
+	link.InsertAtTail(2)
+	link.InsertAtTail(3)
+	link.InsertAtTail(4)
+
+	middle1 := link.GetMiddleNode()
+	assert.Equal(3, middle1.Value)
+
+	link.InsertAtTail(5)
+	link.InsertAtTail(6)
+	link.InsertAtTail(7)
+	middle2 := link.GetMiddleNode()
+	assert.Equal(4, middle2.Value)
+}