1 files changed, 29 insertions, 0 deletions
diff --git a/tests/api-testing/action/Block.js b/tests/api-testing/action/Block.js
new file mode 100644
index 000000000000..8053137494b5
--- /dev/null
+++ b/tests/api-testing/action/Block.js
@@ -0,0 +1,29 @@
+'use strict';
+
+const { action, assert } = require( 'api-testing' );
+
+describe( 'Block', () => {
+	const ip = '::' + Math.floor( Math.random() * 65534 ).toString( 16 );
+	it( 'should not allow multiblocks without newblock (T389028)', async () => {
+		const mindy = await action.mindy();
+		const token = await mindy.token();
+		const promises = [
+			mindy.request( { action: 'block', user: ip, token: token }, 'POST' ),
+			mindy.request( { action: 'block', user: ip, token: token }, 'POST' )
+		];
+		const res = await Promise.all( promises );
+		assert.lengthOf( res, 2 );
+		assert.equal( res[ 0 ].status, 200 );
+		assert.equal( res[ 1 ].status, 200 );
+
+		const goodIndex = 'block' in res[ 0 ].body ? 0 : 1;
+		const goodBody = res[ goodIndex ].body;
+		const badBody = res[ +!goodIndex ].body;
+
+		assert.property( goodBody, 'block' );
+		assert.isOk( goodBody.block.id );
+
+		assert.property( badBody, 'error' );
+		assert.equal( badBody.error.code, 'alreadyblocked' );
+	} );
+} );