test: add some basic unit tests for new utility methods

pkg/deploy/utils_test.go

@@ -0,0 +1,88 @@
+package deploy
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestGetImageNameAndTag(t *testing.T) {
+	tests := []struct {
+		name          string
+		imageName     string
+		expectedName  string
+		expectedTag   string
+		expectError   bool
+		description   string
+	}{
+		{
+			name:         "standard image with tag",
+			imageName:    "nginx:1.23",
+			expectedName: "nginx",
+			expectedTag:  "1.23",
+			expectError:  false,
+			description:  "should parse standard image name with tag",
+		},
+		{
+			name:         "image with digest",
+			imageName:    "nginx:1.23@sha256:abc123",
+			expectedName: "nginx",
+			expectedTag:  "1.23",
+			expectError:  false,
+			description:  "should parse image with digest, ignoring digest part",
+		},
+		{
+			name:         "image with latest tag",
+			imageName:    "redis:latest",
+			expectedName: "redis",
+			expectedTag:  "latest",
+			expectError:  false,
+			description:  "should parse image with latest tag",
+		},
+		{
+			name:         "image with numeric tag",
+			imageName:    "postgres:14",
+			expectedName: "postgres",
+			expectedTag:  "14",
+			expectError:  false,
+			description:  "should parse image with numeric tag",
+		},
+		{
+			name:         "image with complex name",
+			imageName:    "registry.example.com/myapp/api:v1.2.3",
+			expectedName: "registry.example.com/myapp/api",
+			expectedTag:  "v1.2.3",
+			expectError:  false,
+			description:  "should parse image with registry prefix and complex name",
+		},
+		{
+			name:        "image without tag",
+			imageName:   "nginx",
+			expectError: true,
+			description: "should error when no tag present",
+		},
+		{
+			name:        "empty image name",
+			imageName:   "",
+			expectError: true,
+			description: "should error on empty image name",
+		},
+
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			name, tag, err := GetImageNameAndTag(tt.imageName)
+			
+			if tt.expectError {
+				assert.Error(t, err)
+				assert.Empty(t, name)
+				assert.Empty(t, tag)
+			} else {
+				assert.NoError(t, err)
+				assert.Equal(t, tt.expectedName, name)
+				assert.Equal(t, tt.expectedTag, tag)
+			}
+		})
+	}
+}