test(desktop): add avro test

rename function(s) in src/utils/avro.ts
update error message

src/utils/avro.ts

@@ -1,21 +1,21 @@
 import * as avro from 'avsc'
 import { convertObject } from './schemaUtils'
 
-const validateSchema = (rawAvroSchema: string): avro.Type => {
+export const parseSchema = (rawAvroSchema: string): avro.Type => {
   let parsedSchema
 
   try {
     parsedSchema = JSON.parse(rawAvroSchema)
   } catch (err) {
-    throw new Error(`Message serialization error: ${(err as Error).message}`)
+    throw new Error(`Schema not following JSON format: ${(err as Error).message}`)
   }
 
   return avro.Type.forSchema(parsedSchema)
 }
 
 export const checkAvroInput = (rawAvroSchema: string, input: string, format?: PayloadType): string => {
   try {
-    const type: avro.Type = validateSchema(rawAvroSchema)
+    const type: avro.Type = parseSchema(rawAvroSchema)
 
     type.isValid(JSON.parse(input), {
       errorHook: (path, value, type) => {
@@ -34,7 +34,7 @@ export const checkAvroInput = (rawAvroSchema: string, input: string, format?: Pa
 }
 
 export const serializeAvroToBuffer = (raw: string, rawAvroSchema: string, format?: PayloadType): Buffer => {
-  const type: avro.Type = validateSchema(rawAvroSchema)
+  const type: avro.Type = parseSchema(rawAvroSchema)
 
   let rawMessage: string
   try {
@@ -64,7 +64,7 @@ export const deserializeBufferToAvro = (
   rawAvroSchema: string,
   needFormat?: PayloadType,
 ): Buffer | string => {
-  const type: avro.Type = validateSchema(rawAvroSchema)
+  const type: avro.Type = parseSchema(rawAvroSchema)
 
   try {
     const message = type.fromBuffer(payload)

tests/unit/utils/avro.spec.ts

@@ -0,0 +1,97 @@
+import { expect } from 'chai'
+import { parseSchema, checkAvroInput, serializeAvroToBuffer, deserializeBufferToAvro } from '@/utils/avro'
+
+import * as avro from 'avsc'
+
+describe('Avro Utils', () => {
+  const mockSchema = `
+    {
+      "type": "record",
+      "name": "Person",
+      "fields": [
+        {"name": "id", "type": "int"},
+        {"name": "name", "type": "string"}
+      ]
+    }
+  `
+
+  describe('parseSchema', () => {
+    it('should parse raw schema into avro type', () => {
+      const targetSchema = avro.Type.forSchema(JSON.parse(mockSchema))
+
+      const resultSchema = parseSchema(mockSchema)
+
+      expect(avro.Type.isType(resultSchema)).to.be.true
+      expect(targetSchema.equals(resultSchema)).to.be.true
+    })
+
+    it('should throw an error if raw schema does not follow JSON format', () => {
+      const invalidRawSchema = 'hello world!'
+      expect(() => parseSchema(invalidRawSchema)).to.throw('Schema not following JSON format: ')
+    })
+
+    it('should throw an error if raw schema does not fit avro schema pattern', () => {
+      const invalidAvroSchema = `
+        {
+          "type": "invalid",
+          "name": "TestRecord",
+          "fields": [
+            { "name": "field1", "type": "string" }
+          ]
+        }
+      `
+
+      expect(() => parseSchema(invalidAvroSchema)).to.throw('unknown type: "invalid"')
+    })
+  })
+
+  describe('checkAvroInput', () => {
+    it('should validate correct avro input', () => {
+      const correctInput = JSON.stringify({ id: 7, name: 'Last' })
+      const output = checkAvroInput(mockSchema, correctInput)
+
+      expect(output).to.be.a('string')
+      expect(output).to.include('7')
+      expect(output).to.include('Last')
+    })
+
+    it('should throw an error for invalid avro input', () => {
+      const invalidInput = JSON.stringify({ id: 4, name: 7 })
+
+      expect(() => checkAvroInput(mockSchema, invalidInput)).to.throw('Message Test Error at path')
+    })
+  })
+
+  describe('serializeAvroToBuffer', () => {
+    it('should serialize valid input to buffer', () => {
+      const correctInput = JSON.stringify({ id: 7, name: 'Carnival' })
+      const resultBuffer = serializeAvroToBuffer(correctInput, mockSchema)
+
+      expect(resultBuffer).to.be.instanceof(Buffer)
+    })
+
+    it('should throw error for invalid input', () => {
+      const invalidInput = JSON.stringify({ id: 'Last', name: 'Carnival' })
+      expect(() => serializeAvroToBuffer(invalidInput, mockSchema)).to.throw('Message serialization error:')
+    })
+  })
+
+  describe('deserializeBufferToAvro', () => {
+    it('should deserialize buffer to avro object', () => {
+      const schema = avro.Type.forSchema(JSON.parse(mockSchema))
+      const inputBuffer = schema.toBuffer({ id: 3, name: 'Skinandi' })
+
+      const result = deserializeBufferToAvro(inputBuffer, mockSchema)
+
+      expect(result).to.be.a('string')
+      expect(result).to.include('3')
+      expect(result).to.include('Skinandi')
+    })
+
+    it('should throw an error for invalid buffer', () => {
+      const randomeBuffer = Buffer.from([0x4f, 0x61, 0x7a, 0x3b, 0x19, 0x8e, 0x27, 0x56, 0x9c, 0x2d, 0x73, 0x81])
+
+      expect(() => deserializeBufferToAvro(randomeBuffer, mockSchema)).to.throw('Message deserialization error:')
+    })
+  })
+})