chore(model-loader): increase test coverage of model loader (#3433)

chore(model-loader): increase coverage of model loader

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

pkg/model/loader_test.go

@@ -0,0 +1,105 @@
+package model_test
+
+import (
+	"errors"
+	"os"
+	"path/filepath"
+
+	"github.com/mudler/LocalAI/pkg/model"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("ModelLoader", func() {
+	var (
+		modelLoader *model.ModelLoader
+		modelPath   string
+		mockModel   *model.Model
+	)
+
+	BeforeEach(func() {
+		// Setup the model loader with a test directory
+		modelPath = "/tmp/test_model_path"
+		os.Mkdir(modelPath, 0755)
+		modelLoader = model.NewModelLoader(modelPath)
+	})
+
+	AfterEach(func() {
+		// Cleanup test directory
+		os.RemoveAll(modelPath)
+	})
+
+	Context("NewModelLoader", func() {
+		It("should create a new ModelLoader with an empty model map", func() {
+			Expect(modelLoader).ToNot(BeNil())
+			Expect(modelLoader.ModelPath).To(Equal(modelPath))
+			Expect(modelLoader.ListModels()).To(BeEmpty())
+		})
+	})
+
+	Context("ExistsInModelPath", func() {
+		It("should return true if a file exists in the model path", func() {
+			testFile := filepath.Join(modelPath, "test.model")
+			os.Create(testFile)
+			Expect(modelLoader.ExistsInModelPath("test.model")).To(BeTrue())
+		})
+
+		It("should return false if a file does not exist in the model path", func() {
+			Expect(modelLoader.ExistsInModelPath("nonexistent.model")).To(BeFalse())
+		})
+	})
+
+	Context("ListFilesInModelPath", func() {
+		It("should list all valid model files in the model path", func() {
+			os.Create(filepath.Join(modelPath, "test.model"))
+			os.Create(filepath.Join(modelPath, "README.md"))
+
+			files, err := modelLoader.ListFilesInModelPath()
+			Expect(err).To(BeNil())
+			Expect(files).To(ContainElement("test.model"))
+			Expect(files).ToNot(ContainElement("README.md"))
+		})
+	})
+
+	Context("LoadModel", func() {
+		It("should load a model and keep it in memory", func() {
+			mockModel = model.NewModel("test.model")
+
+			mockLoader := func(modelName, modelFile string) (*model.Model, error) {
+				return mockModel, nil
+			}
+
+			model, err := modelLoader.LoadModel("test.model", mockLoader)
+			Expect(err).To(BeNil())
+			Expect(model).To(Equal(mockModel))
+			Expect(modelLoader.CheckIsLoaded("test.model")).To(Equal(mockModel))
+		})
+
+		It("should return an error if loading the model fails", func() {
+			mockLoader := func(modelName, modelFile string) (*model.Model, error) {
+				return nil, errors.New("failed to load model")
+			}
+
+			model, err := modelLoader.LoadModel("test.model", mockLoader)
+			Expect(err).To(HaveOccurred())
+			Expect(model).To(BeNil())
+		})
+	})
+
+	Context("ShutdownModel", func() {
+		It("should shutdown a loaded model", func() {
+			mockModel = model.NewModel("test.model")
+
+			mockLoader := func(modelName, modelFile string) (*model.Model, error) {
+				return mockModel, nil
+			}
+
+			_, err := modelLoader.LoadModel("test.model", mockLoader)
+			Expect(err).To(BeNil())
+
+			err = modelLoader.ShutdownModel("test.model")
+			Expect(err).To(BeNil())
+			Expect(modelLoader.CheckIsLoaded("test.model")).To(BeNil())
+		})
+	})
+})