added tests for errors and handling errors correctly now

bundle/schema/schema.go

@@ -7,15 +7,14 @@ import (
 	"strings"
 )
 
-// TODO: Add tests for the error cases, forcefully triggering them
 // TODO: Add example documentation
 // TODO: Do final checks for more validation that can be added to json schema
-// TODO: Run all tests to see code coverage and add tests for missing assertions
+// TODO: cleanup docs and reorder code if needed
 
 // defines schema for a json object
 type Schema struct {
 	// Type of the object
-	Type JavascriptType `json:"type"`
+	Type JavascriptType `json:"type,omitempty"`
 
 	// Description of the object. This is rendered as inline documentation in the
 	// IDE
@@ -96,7 +95,6 @@ const (
 	Array   JavascriptType = "array"
 )
 
-// TODO: document that only string keys allowed in maps
 func javascriptType(golangType reflect.Type) (JavascriptType, error) {
 	switch golangType.Kind() {
 	case reflect.Bool:
@@ -191,8 +189,6 @@ func addStructFields(fields []reflect.StructField, golangType reflect.Type) []re
 	return fields
 }
 
-// TODO: see what kind of schema will be generated for interface{}
-
 // params:
 //   golangType: golang type for which json schema properties to generate
 //   seenTypes : set of golang types already seen in path during recursion.
@@ -205,9 +201,8 @@ func toSchema(golangType reflect.Type, docs *Docs, seenTypes map[reflect.Type]st
 		return toSchema(golangType.Elem(), docs, seenTypes, debugTrace)
 	}
 
-	// TODO: add test case for interfaces
 	if golangType.Kind() == reflect.Interface {
-		return nil, nil
+		return &Schema{}, nil
 	}
 
 	rootJavascriptType, err := javascriptType(golangType)
@@ -233,15 +228,12 @@ func toSchema(golangType reflect.Type, docs *Docs, seenTypes map[reflect.Type]st
 			return nil, err
 		}
 		items = &Schema{
-			// TODO: Add a test for slice of object
 			Type:                 elemJavascriptType,
 			Properties:           elemProps.Properties,
 			AdditionalProperties: elemProps.AdditionalProperties,
 			Items:                elemProps.Items,
 			Required:             elemProps.Required,
 		}
-		// TODO: what if there is an array of maps. Add additional properties to
-		// TODO: what if there are maps of maps
 	}
 
 	// case map
@@ -250,8 +242,6 @@ func toSchema(golangType reflect.Type, docs *Docs, seenTypes map[reflect.Type]st
 		if golangType.Key().Kind() != reflect.String {
 			return nil, fmt.Errorf("only string keyed maps allowed")
 		}
-		// TODO: Add a test for map of maps, and map of slices. Check that there
-		// is already a test for map of objects and map of primites
 		additionalProperties, err = safeToSchema(golangType.Elem(), docs, seenTypes, debugTrace)
 		if err != nil {
 			return nil, err
@@ -265,11 +255,12 @@ func toSchema(golangType reflect.Type, docs *Docs, seenTypes map[reflect.Type]st
 		children := []reflect.StructField{}
 		children = addStructFields(children, golangType)
 		for _, child := range children {
-			// compute child properties
+			// get child json tags
 			childJsonTag := strings.Split(child.Tag.Get("json"), ",")
 			childName := childJsonTag[0]
 
-			// skip fields that are not annotated or annotated with "-"
+			// skip children that have no json tags, the first json tag is ""
+			// or the first json tag is "-"
 			if childName == "" || childName == "-" {
 				continue
 			}
@@ -282,7 +273,8 @@ func toSchema(golangType reflect.Type, docs *Docs, seenTypes map[reflect.Type]st
 				}
 			}
 
-			// TODO: Add test for omitempty
+			// compute if the child is a required field. Determined by the
+			// resence of "omitempty" in the json tags
 			hasOmitEmptyTag := false
 			for i := 1; i < len(childJsonTag); i++ {
 				if childJsonTag[i] == "omitempty" {
@@ -293,25 +285,19 @@ func toSchema(golangType reflect.Type, docs *Docs, seenTypes map[reflect.Type]st
 				required = append(required, childName)
 			}
 
-			// add current field to debug trace
-			// TODO: Add tests testing correct traversal and adding of strings
-			// into debugTrace
+			// compute Schema.Properties for the child recursively
 			debugTrace.PushBack(childName)
-
-			// recursively compute properties for this child field
 			fieldProps, err := safeToSchema(child.Type, childDocs, seenTypes, debugTrace)
 			if err != nil {
 				return nil, err
 			}
 			properties[childName] = fieldProps
-
-			// remove current field from debug trace
 			back := debugTrace.Back()
 			debugTrace.Remove(back)
-
-			// set Schema.AdditionalProperties to false
-			additionalProperties = false
 		}
+
+		// set Schema.AdditionalProperties to false
+		additionalProperties = false
 	}
 
 	return &Schema{

bundle/schema/schema_test.go

@@ -10,16 +10,7 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
-// TODO: add tests to assert that these are valid json schemas. Maybe validate some
-// json/yaml documents againts them, by unmarshalling a value
-
-// TODO: See that all golang reflect types are covered (reasonalble limits) within
-// these tests
-
-// TODO: test what json schema is generated for an interface{} type. Make sure the behavior makes sense
-
 // TODO: Have a test that combines multiple different cases
-// TODO: have a test for what happens when omitempty in different cases: primitives, object, map, array
 
 func TestIntSchema(t *testing.T) {
 	var elemInt int
@@ -1128,6 +1119,77 @@ func TestDocIngestionInSchema(t *testing.T) {
 	assert.Equal(t, expectedSchema, string(jsonSchema))
 }
 
+func TestErrorOnMapWithoutStringKey(t *testing.T) {
+	type Foo struct {
+		Bar map[int]string `json:"bar"`
+	}
+	elem := Foo{}
+	_, err := NewSchema(reflect.TypeOf(elem), nil)
+	assert.ErrorContains(t, err, "only strings map keys are valid. key type: int")
+}
+
+func TestErrorIfStructRefersToItself(t *testing.T) {
+	type Foo struct {
+		MyFoo *Foo `json:"my_foo"`
+	}
+
+	elem := Foo{}
+	_, err := NewSchema(reflect.TypeOf(elem), nil)
+	assert.ErrorContains(t, err, "ERROR] cycle detected. traversal trace: root -> my_foo -> my_foo")
+}
+
+func TestErrorIfStructHasLoop(t *testing.T) {
+	type Apple struct {
+		MyVal   int `json:"my_val"`
+		MyMango struct {
+			MyGuava struct {
+				MyPapaya struct {
+					MyApple *Apple `json:"my_apple"`
+				} `json:"my_papaya"`
+			} `json:"my_guava"`
+		} `json:"my_mango"`
+	}
+
+	elem := Apple{}
+	_, err := NewSchema(reflect.TypeOf(elem), nil)
+	assert.ErrorContains(t, err, "[ERROR] cycle detected. traversal trace: root -> my_mango -> my_guava -> my_papaya -> my_apple -> my_mango")
+}
+
+func TestInterfaceGeneratesEmptySchema(t *testing.T) {
+	type Foo struct {
+		Apple int         `json:"apple"`
+		Mango interface{} `json:"mango"`
+	}
+
+	elem := Foo{}
+
+	schema, err := NewSchema(reflect.TypeOf(elem), nil)
+	assert.NoError(t, err)
+
+	jsonSchema, err := json.MarshalIndent(schema, "		", "	")
+	assert.NoError(t, err)
+
+	expected :=
+		`{
+			"type": "object",
+			"properties": {
+				"apple": {
+					"type": "number"
+				},
+				"mango": {}
+			},
+			"additionalProperties": false,
+			"required": [
+				"apple",
+				"mango"
+			]
+		}`
+
+	t.Log("[DEBUG] actual: ", string(jsonSchema))
+	t.Log("[DEBUG] expected: ", expected)
+	assert.Equal(t, expected, string(jsonSchema))
+}
+
 // // Only for testing bundle, will be removed
 // func TestBundleSchema(t *testing.T) {
 // 	elem := config.Root{}