feat(skills): add validation for skill info and test cases (#231)

Add validation logic for SkillInfo to ensure name and description meet requirements
Include test cases covering various validation scenarios
Add testify dependency for testing assertions

pkg/skills/loader_test.go

@@ -0,0 +1,77 @@
+package skills
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestSkillsInfoValidate(t *testing.T) {
+	testcases := []struct {
+		name        string
+		skillName   string
+		description string
+		wantErr     bool
+		errContains []string
+	}{
+		{
+			name:        "valid-skill",
+			skillName:   "valid-skill",
+			description: "a valid skill description",
+			wantErr:     false,
+		},
+		{
+			name:        "empty-name",
+			skillName:   "",
+			description: "description without name",
+			wantErr:     true,
+			errContains: []string{"name is required"},
+		},
+		{
+			name:        "empty-description",
+			skillName:   "skill-without-description",
+			description: "",
+			wantErr:     true,
+			errContains: []string{"description is required"},
+		},
+		{
+			name:        "empty-both",
+			skillName:   "",
+			description: "",
+			wantErr:     true,
+			errContains: []string{"name is required", "description is required"},
+		},
+		{
+			name:        "name-with-spaces",
+			skillName:   "skill with spaces",
+			description: "invalid name with spaces",
+			wantErr:     true,
+			errContains: []string{"name must be alphanumeric with hyphens"},
+		},
+		{
+			name:        "name-with-underscore",
+			skillName:   "skill_underscore",
+			description: "invalid name with underscore",
+			wantErr:     true,
+			errContains: []string{"name must be alphanumeric with hyphens"},
+		},
+	}
+
+	for _, tc := range testcases {
+		t.Run(tc.name, func(t *testing.T) {
+			info := SkillInfo{
+				Name:        tc.skillName,
+				Description: tc.description,
+			}
+			err := info.validate()
+			if tc.wantErr {
+				assert.Error(t, err)
+				for _, msg := range tc.errContains {
+					assert.ErrorContains(t, err, msg)
+				}
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}