chore: add test for isBinary explicitly set to false

lib/backends/kv-backend.test.js

@@ -490,6 +490,7 @@ describe('kv-backend', () => {
       kvBackend._get.onCall(0).resolves(Buffer.from('YmluYXJ5Cg==', 'base64')) // base64 of binary as a Buffer
       kvBackend._get.onCall(1).resolves(Buffer.from('YmluYXJ5Cg==', 'base64')) // base64 of binary as a Buffer
       kvBackend._get.onCall(2).resolves('YmluYXJ5Cg==') // base64 of binary as String
+      kvBackend._get.onCall(3).resolves('test') // base64 of binary as String
       // e.g. AWS Secrets Manager will return `SecretBinary` as a Buffer and `SecretString` as a String
 
       const manifestData = await kvBackend.getSecretManifestData({
@@ -508,14 +509,19 @@ describe('kv-backend', () => {
             // isBinary: false,
             // must be set to true to ensure base64-encoded string in the backend
             // is not encoded in base64 again
+          }, {
+            key: 'stringPropertyKey4',
+            name: 'stringPropertyName4',
+            isBinary: false // explicitly set false
           }]
         }
       })
 
       expect(manifestData).deep.equals({
         binaryPropertyName1: 'YmluYXJ5Cg==', // base64 of binary (unchanged)
         binaryPropertyName2: 'YmluYXJ5Cg==', // base64 of binary (unchanged)
-        stringPropertyName3: 'WW1sdVlYSjVDZz09' // base64 of base64 of binary
+        stringPropertyName3: 'WW1sdVlYSjVDZz09', // base64 of base64 of binary
+        stringPropertyName4: 'dGVzdA==' // base64 of test
       })
     })
   })