test for #19

test/samples/no-valid-keys/main.js

@@ -0,0 +1,5 @@
+import mimeDb from './mime-db.json';
+
+assert.deepEqual( mimeDb[ 'application/1d-interleaved-parityfec' ], {
+	source: 'iana'
+});

test/samples/no-valid-keys/mime-db.json

@@ -0,0 +1,11 @@
+{
+  "application/1d-interleaved-parityfec": {
+    "source": "iana"
+  },
+  "application/3gpdash-qoe-report+xml": {
+    "source": "iana"
+  },
+  "application/3gpp-ims+xml": {
+    "source": "iana"
+  }
+}

test/test.js

@@ -427,4 +427,17 @@ describe( 'rollup-plugin-json', function () {
 			"sourceType": "module"
 		});
 	});
+
+	it( 'handles JSON objects with no valid keys (#19)', function () {
+		return rollup.rollup({
+			entry: 'samples/no-valid-keys/main.js',
+			plugins: [ json() ]
+		}).then( function ( bundle ) {
+			var generated = bundle.generate();
+			var code = generated.code;
+
+			var fn = new Function( 'assert', code );
+			fn( assert );
+		});
+	});
 });