Implement CRUD puppy with interface

06_puppy/patrickmarabeas/main.go

@@ -0,0 +1,5 @@
+package main
+
+func main() {
+
+}

06_puppy/patrickmarabeas/main_test.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"testing"
+)
+
+var out io.Writer = os.Stdout
+
+func TestMainOutput(t *testing.T) {
+	var buf bytes.Buffer
+	out = &buf
+
+	main()
+
+	expected := ""
+
+	got := buf.String()
+
+	if expected != got {
+		t.Errorf("\nExpected: %s\nGot: %s", expected, got)
+	}
+}

06_puppy/patrickmarabeas/mapStore.go

@@ -0,0 +1,56 @@
+package main
+
+type MapStore struct {
+	uuid  uint
+	store map[uint]Puppy
+}
+
+// NewMapStore returns a pointer to a new instance of the MapStore struct which implements the Storer interface.
+func NewMapStore() Storer {
+	return &MapStore{
+		uuid:  0,
+		store: map[uint]Puppy{},
+	}
+}
+
+// Create increments the uuid and adds the provided Puppy struct to the store with this identifier.
+func (store *MapStore) Create(puppy Puppy) uint {
+	puppy.ID = store.uuid
+	store.store[puppy.ID] = puppy
+	store.uuid++
+
+	return puppy.ID
+}
+
+// Read returns the puppy matching the provided uuid.
+// An empty Puppy struct is returned if the identifier does not exist.
+func (store *MapStore) Read(id uint) Puppy {
+	if _, ok := store.store[id]; ok {
+		return store.store[id]
+	}
+
+	return Puppy{}
+}
+
+// Update modifies the puppy matching the provided uuid in the store with the provided Puppy struct.
+// It returns a bool whether a matching identifier was modified or not.
+func (store *MapStore) Update(id uint, puppy Puppy) bool {
+	if _, ok := store.store[id]; !ok {
+		return false
+	}
+
+	puppy.ID = id
+	store.store[id] = puppy
+	return true
+}
+
+// Destroy removes the puppy matching the provided uuid from the store.
+// It returns a bool whether a matching identifier was deleted or not.
+func (store *MapStore) Destroy(id uint) bool {
+	if _, ok := store.store[id]; !ok {
+		return false
+	}
+
+	delete(store.store, id)
+	return true
+}

06_puppy/patrickmarabeas/store_test.go

@@ -0,0 +1,81 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/suite"
+)
+
+type StoreSuite struct {
+	suite.Suite
+	store Storer
+}
+
+func (suite *StoreSuite) TestCreate() {
+	a := assert.New(suite.T())
+	id := suite.store.Create(Puppy{Breed: "Wolf", Color: "Grey", Value: "450"})
+	id2 := suite.store.Create(Puppy{Breed: "Boxer", Color: "Brown", Value: "300"})
+
+	a.EqualValues(id+1, id2)
+}
+
+func (suite *StoreSuite) TestRead() {
+	a := assert.New(suite.T())
+	data := suite.store.Read(0)
+
+	a.Equal(data, Puppy{ID: 0, Breed: "Wolf", Color: "Grey", Value: "450"})
+}
+
+func (suite *StoreSuite) TestReadNonExistent() {
+	a := assert.New(suite.T())
+	success := suite.store.Read(100)
+
+	a.Equal(success, Puppy{})
+}
+
+func (suite *StoreSuite) TestUpdate() {
+	a := assert.New(suite.T())
+	success := suite.store.Update(0, Puppy{Breed: "Doberman", Color: "Black", Value: "500"})
+	data := suite.store.Read(0)
+
+	a.Equal(success, true)
+	a.Equal(data, Puppy{ID: 0, Breed: "Doberman", Color: "Black", Value: "500"})
+}
+
+func (suite *StoreSuite) TestUpdateNonExistent() {
+	a := assert.New(suite.T())
+	success := suite.store.Update(100, Puppy{Breed: "Doberman", Color: "Black", Value: "500"})
+
+	a.Equal(success, false)
+}
+
+func (suite *StoreSuite) TestDestroy() {
+	a := assert.New(suite.T())
+	success := suite.store.Destroy(1)
+	data := suite.store.Read(1)
+
+	a.Equal(success, true)
+	a.Equal(data, Puppy{})
+}
+
+func (suite *StoreSuite) TestDestroyNonExistent() {
+	a := assert.New(suite.T())
+	success := suite.store.Destroy(100)
+
+	a.Equal(success, false)
+}
+
+func (suite *StoreSuite) TestIdIncrementOnDelete() {
+	a := assert.New(suite.T())
+	id := suite.store.Create(Puppy{Breed: "Greyhound", Color: "Light Brown", Value: "700"})
+	suite.store.Destroy(id)
+	newID := suite.store.Create(Puppy{Breed: "Greyhound", Color: "Light Brown", Value: "700"})
+
+	a.EqualValues(newID, 3)
+}
+
+func TestStore(t *testing.T) {
+	suite.Run(t, &StoreSuite{store: NewMapStore()})
+	suite.Run(t, &StoreSuite{store: NewSyncStore()})
+}

06_puppy/patrickmarabeas/syncStore.go

@@ -0,0 +1,59 @@
+package main
+
+import (
+	"sync"
+)
+
+type SyncStore struct {
+	uuid uint
+	sync.Map
+}
+
+// NewSyncStore returns a pointer to a new instance of the SyncStore struct which implements the Storer interface.
+func NewSyncStore() Storer {
+	return &SyncStore{
+		uuid: 0,
+	}
+}
+
+// Create increments the uuid and adds the provided Puppy struct to the store with this identifier.
+func (store *SyncStore) Create(puppy Puppy) uint {
+	puppy.ID = store.uuid
+	store.Store(puppy.ID, puppy)
+	store.uuid++
+
+	return puppy.ID
+}
+
+// Read returns the puppy matching the provided uuid.
+// An empty Puppy struct is returned if the identifier does not exist.
+func (store *SyncStore) Read(id uint) Puppy {
+	if value, ok := store.Load(id); ok {
+		return value.(Puppy)
+	}
+
+	return Puppy{}
+}
+
+// Update modifies the puppy matching the provided uuid in the store with the provided Puppy struct.
+// It returns a bool whether a matching identifier was modified or not.
+func (store *SyncStore) Update(id uint, puppy Puppy) bool {
+	if _, ok := store.Load(id); !ok {
+		return false
+	}
+
+	puppy.ID = id
+	store.Store(id, puppy)
+	return true
+}
+
+// Destroy removes the puppy matching the provided uuid from the store.
+// It returns a bool whether a matching identifier was deleted or not.
+func (store *SyncStore) Destroy(id uint) bool {
+	if _, ok := store.Load(id); !ok {
+		return false
+	}
+
+	store.Delete(id)
+	return true
+}

06_puppy/patrickmarabeas/types.go

@@ -0,0 +1,15 @@
+package main
+
+type Puppy struct {
+	ID    uint
+	Breed string
+	Color string
+	Value string
+}
+
+type Storer interface {
+	Create(puppy Puppy) uint
+	Read(ID uint) Puppy
+	Update(ID uint, puppy Puppy) bool
+	Destroy(ID uint) bool
+}