fix: support inspecting bigints (#1321) (#1383)

chaijs · Mar 12, 2021 · 5b607a1 · 5b607a1
1 parent dc858a0
commit 5b607a1
Show file tree

Hide file tree

Showing 3 changed files with 16 additions and 0 deletions.
diff --git a/chai.js b/chai.js
@@ -8746,6 +8746,9 @@ function formatPrimitive(ctx, value) {
 
     case 'symbol':
       return ctx.stylize(value.toString(), 'symbol');
+
+    case 'bigint':
+      return ctx.stylize(value.toString() + 'n', 'bigint');
   }
   // For some reason typeof null is "object", so special case here.
   if (value === null) {

diff --git a/lib/chai/utils/inspect.js b/lib/chai/utils/inspect.js
@@ -218,6 +218,9 @@ function formatPrimitive(ctx, value) {
 
     case 'symbol':
       return ctx.stylize(value.toString(), 'symbol');
+
+    case 'bigint':
+      return ctx.stylize(value.toString() + 'n', 'bigint');
   }
   // For some reason typeof null is "object", so special case here.
   if (value === null) {

diff --git a/test/utilities.js b/test/utilities.js
@@ -756,6 +756,16 @@ describe('utilities', function () {
     });
   });
 
+  it('inspect BigInt', function () {
+    if (typeof BigInt !== 'function') return;
+
+    chai.use(function (_chai, _) {
+      expect(_.inspect(BigInt(0))).to.equal('0n');
+      expect(_.inspect(BigInt(1234))).to.equal('1234n');
+      expect(_.inspect(BigInt(-1234))).to.equal('-1234n');
+    });
+  });
+
   it('inspect every kind of available TypedArray', function () {
     chai.use(function (_chai, _) {
       var arr = [1, 2, 3]