fix(contract): stringify maps as arrays

src/utils/print.js

@@ -30,21 +30,25 @@ function getTabs(tabs) {
   return ' '.repeat(tabs * 4);
 }
 
-const JsonStringifyBigInt = (object, spaced) => JSON.stringify(
+const JsonStringifyEs = (object, spaced) => JSON.stringify(
   object,
-  (key, value) => (typeof value === 'bigint' ? `${value}` : value),
+  (key, value) => {
+    if (typeof value === 'bigint') return `${value}`;
+    if (value instanceof Map) return [...value.entries()];
+    return value;
+  },
   spaced ? 2 : undefined,
 );
 
 // Print helper
 export function print(msg, obj) {
   if (typeof msg === 'object') {
-    console.log(JsonStringifyBigInt(msg, true));
+    console.log(JsonStringifyEs(msg, true));
     return;
   }
   if (obj) {
     console.log(msg);
-    console.log(JsonStringifyBigInt(obj, true));
+    console.log(JsonStringifyEs(obj, true));
   } else {
     console.log(msg);
   }
@@ -60,7 +64,7 @@ export function printUnderscored(key, val) {
   print([
     key,
     '_'.repeat(WIDTH - key.length),
-    typeof val !== 'object' ? val : JsonStringifyBigInt(val),
+    typeof val !== 'object' ? val : JsonStringifyEs(val),
   ].join(' '));
 }
 

test/contract.js

@@ -35,6 +35,7 @@ contract Identity =
   record state = { z: int }
   entrypoint init(_z: int) = { z = _z }
   entrypoint test(x : int, y: int) = x + y + state.z
+  entrypoint getMap(): map(int, int) = {[1] = 2, [3] = 4}
 `;
 
 describe('Contract Module', function contractTests() {
@@ -194,6 +195,17 @@ describe('Contract Module', function contractTests() {
       callResponse.decodedResult.should.equal('6');
     });
 
+    it('returns Maps correctly', async () => {
+      const callResponse = await executeContract([
+        'call',
+        '--json',
+        '--descrPath', deployDescriptorFile,
+        'getMap',
+        '--callStatic',
+      ]);
+      expect(callResponse.decodedResult).to.be.eql([['1', '2'], ['3', '4']]);
+    });
+
     it('calls contract by contract source and address', async () => {
       const callResponse = await executeContract([
         'call',