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diff --git a/test/handlers/assembly-documentation/java-tests.js b/test/handlers/assembly-documentation/java-tests.js
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+// Copyright (c) 2021, Compiler Explorer Authors
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+//     * Redistributions of source code must retain the above copyright notice,
+//       this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above copyright
+//       notice, this list of conditions and the following disclaimer in the
+//       documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+
+import express from 'express';
+
+import { JavaDocumentationHandler } from '../../../lib/handlers/assembly-documentation/java';
+import { chai } from '../../utils';
+
+describe('jvm assembly documentation', () => {
+    let app;
+    before(() => {
+        app = express();
+        const handler = new JavaDocumentationHandler();
+        app.use('/asm/:opcode', handler.handle.bind(handler));
+    });
+
+    it('returns 404 for unknown opcodes', () => {
+        return chai.request(app).get('/asm/mov_oh_wait')
+            .then(res => {
+                res.should.have.status(404);
+                res.should.be.json;
+                res.body.should.deep.equal({ error: 'Unknown opcode \'MOV_OH_WAIT\'' });
+            }).catch(e => { throw e; });
+    });
+
+    it('responds to accept=text requests', () => {
+        return chai.request(app).get('/asm/iload_0')
+            .then(res => {
+                res.should.have.status(200);
+                res.should.be.html;
+                res.text.should.contain('Load int from local variable');
+            }).catch(e => { throw e; });
+    });
+
+    it('responds to accept=json requests', () => {
+        return chai.request(app).get('/asm/iload_0')
+            .set('Accept', 'application/json')
+            .then(res => {
+                res.should.have.status(200);
+                res.should.be.json;
+                res.body.html.should.contain('Load int from local variable');
+                res.body.tooltip.should.contain('Load int from local variable');
+                res.body.url.should.contain('https://docs.oracle.com/javase/specs/jvms/se16/html/');
+            }).catch(e => { throw e; });
+    });
+
+    it('should return 406 on bad accept type', () => {
+        return chai.request(app).get('/asm/iload_0')
+            .set('Accept', 'application/pdf')
+            .then(res => {
+                res.should.have.status(406);
+            }).catch(e => { throw e; });
+    });
+});