Improved code coverage and fixed nil error when copying references

index/rolodex.go

@@ -436,6 +436,9 @@ func (r *Rolodex) BuildIndexes() {
 func (r *Rolodex) GetAllReferences() map[string]*Reference {
 	allRefs := make(map[string]*Reference)
 	for _, idx := range append(r.GetIndexes(), r.GetRootIndex()) {
+		if idx == nil {
+			continue
+		}
 		refs := idx.GetAllReferences()
 		maps.Copy(allRefs, refs)
 	}
@@ -446,6 +449,9 @@ func (r *Rolodex) GetAllReferences() map[string]*Reference {
 func (r *Rolodex) GetAllMappedReferences() map[string]*Reference {
 	mappedRefs := make(map[string]*Reference)
 	for _, idx := range append(r.GetIndexes(), r.GetRootIndex()) {
+		if idx == nil {
+			continue
+		}
 		refs := idx.GetMappedReferences()
 		maps.Copy(mappedRefs, refs)
 	}

index/rolodex_test.go

@@ -24,6 +24,8 @@ import (
 func TestRolodex_NewRolodex(t *testing.T) {
 	c := CreateOpenAPIIndexConfig()
 	rolo := NewRolodex(c)
+	assert.Len(t, rolo.GetAllReferences(), 0)
+	assert.Len(t, rolo.GetAllMappedReferences(), 0)
 	assert.NotNil(t, rolo)
 	assert.NotNil(t, rolo.indexConfig)
 	assert.Nil(t, rolo.GetIgnoredCircularReferences())
@@ -1520,18 +1522,27 @@ func TestRolodex_SimpleTest_OneDoc(t *testing.T) {
 	}
 
 	cf := CreateOpenAPIIndexConfig()
+	cf.SpecFilePath = filepath.Join(baseDir, "doc1.yaml")
 	cf.BasePath = baseDir
 	cf.IgnoreArrayCircularReferences = true
 	cf.IgnorePolymorphicCircularReferences = true
 
 	rolo := NewRolodex(cf)
 	rolo.AddLocalFS(baseDir, fileFS)
 
+	rootBytes, err := os.ReadFile(cf.SpecFilePath)
+	assert.NoError(t, err)
+	var rootNode yaml.Node
+	_ = yaml.Unmarshal(rootBytes, &rootNode)
+	rolo.SetRootNode(&rootNode)
+
 	err = rolo.IndexTheRolodex()
 
 	//assert.NotZero(t, rolo.GetIndexingDuration()) comes back as 0 on windows.
-	assert.Nil(t, rolo.GetRootIndex())
+	assert.NotNil(t, rolo.GetRootIndex())
 	assert.Len(t, rolo.GetIndexes(), 10)
+	assert.Len(t, rolo.GetAllReferences(), 7)
+	assert.Len(t, rolo.GetAllMappedReferences(), 7)
 
 	lineCount := rolo.GetFullLineCount()
 	assert.Equal(t, int64(158), lineCount, "total line count in the rolodex is wrong")