fix(scw): decimal json representation (#1460)

Author: Codelax

packages/clients/src/scw/__tests__/custom-marshalling.test.ts

@@ -4,12 +4,14 @@ import {
   marshalScwFile,
   marshalTimeSeries,
   marshalTimeSeriesPoint,
+  unmarshalDecimal,
   unmarshalMoney,
   unmarshalScwFile,
   unmarshalServiceInfo,
   unmarshalTimeSeries,
   unmarshalTimeSeriesPoint,
 } from '../custom-marshalling'
+import { Decimal } from '../custom-types'
 
 describe('unmarshalMoney', () => {
   it('returns the proper object', () => {
@@ -123,6 +125,29 @@ describe('unmarshalTimeSeries', () => {
   })
 })
 
+describe('unmarshalDecimal', () => {
+  it('returns the proper object', () => {
+    const decimal = unmarshalDecimal({
+      value: '0.01',
+    })
+    expect(decimal).toBeInstanceOf(Decimal)
+    expect(decimal?.toString()).toStrictEqual('0.01')
+  })
+
+  it('throws for invalid input', () => {
+    expect(unmarshalDecimal(null)).toBeNull()
+    expect(() => {
+      unmarshalDecimal({})
+    }).toThrow()
+    expect(() => {
+      unmarshalDecimal({ value: null })
+    }).toThrow()
+    expect(() => {
+      unmarshalDecimal({ value: 0.02 })
+    }).toThrow()
+  })
+})
+
 describe('marshalScwFile', () => {
   it('returns a the proper object', () =>
     expect(

packages/clients/src/scw/custom-marshalling.ts

@@ -115,13 +115,28 @@ export const unmarshalTimeSeries = (data: unknown) => {
  * @internal
  */
 export const unmarshalDecimal = (data: unknown) => {
-  if (!(typeof data === 'string')) {
+  if (!(typeof data === 'object')) {
     throw new TypeError(
-      `Unmarshalling the type 'Decimal' failed as data isn't a string.`,
+      `Unmarshalling the type 'Decimal' failed as data isn't an object.`,
+    )
+  }
+  if (data === null) {
+    return null
+  }
+
+  if (!('value' in data)) {
+    throw new TypeError(
+      `Unmarshalling the type 'Decimal' failed as data object does not have a 'value' key.`,
     )
   }
 
-  return new Decimal(data)
+  if (!(typeof data.value === 'string')) {
+    throw new TypeError(
+      `Unmarshalling the type 'Decimal' failed as 'value' is not a string.`,
+    )
+  }
+
+  return new Decimal(data.value)
 }
 
 /**
@@ -189,4 +204,6 @@ export const marshalTimeSeries = (
  *
  * @internal
  */
-export const marshalDecimal = (obj: Decimal): string => obj.toString()
+export const marshalDecimal = (obj: Decimal): { value: string } => ({
+  value: obj.toString(),
+})

packages/clients/src/scw/custom-types.ts

@@ -79,4 +79,6 @@ export class Decimal {
   }
 
   public toString = (): string => this.str
+
+  public marshal = (): object => ({ value: this.str })
 }