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+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Verify the coversion of various types of BufferSource</title>
+<link rel="author" title="Mozilla" href="https://www.mozilla.org">
+<link rel="help" href="http://w3c.github.io/IndexedDB/#key-construct">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+
+<script>
+  test(function() {
+    let binary = new ArrayBuffer(0);
+    let key = IDBKeyRange.lowerBound(binary).lower;
+
+    assert_true(key instanceof ArrayBuffer);
+    assert_equals(key.byteLength, 0);
+    assert_equals(key.byteLength, binary.byteLength);
+  }, "Empty ArrayBuffer");
+
+  test(function() {
+    let binary = new ArrayBuffer(4);
+    let dataView = new DataView(binary);
+    dataView.setUint32(0, 1234567890);
+
+    let key = IDBKeyRange.lowerBound(binary).lower;
+
+    assert_true(key instanceof ArrayBuffer);
+    assert_equals(key.byteLength, 4);
+    assert_equals(dataView.getUint32(0), new DataView(key).getUint32(0));
+  }, "ArrayBuffer");
+
+  test(function() {
+    let binary = new ArrayBuffer(4);
+    let dataView = new DataView(binary);
+    dataView.setUint32(0, 1234567890);
+
+    let key = IDBKeyRange.lowerBound(dataView).lower;
+
+    assert_true(key instanceof ArrayBuffer);
+    assert_equals(key.byteLength, 4);
+    assert_equals(dataView.getUint32(0), new DataView(key).getUint32(0));
+  }, "DataView");
+
+  test(function() {
+    let binary = new ArrayBuffer(4);
+    let dataView = new DataView(binary);
+    let int8Array = new Int8Array(binary);
+    int8Array.set([16, -32, 64, -128]);
+
+    let key = IDBKeyRange.lowerBound(int8Array).lower;
+    let keyInInt8Array = new Int8Array(key);
+
+    assert_true(key instanceof ArrayBuffer);
+    assert_equals(key.byteLength, 4);
+    for(let i = 0; i < int8Array.length; i++) {
+      assert_equals(keyInInt8Array[i], int8Array[i]);
+    }
+  }, "TypedArray(Int8Array)");
+
+  test(function() {
+    let binary = new ArrayBuffer(4);
+    let dataView = new DataView(binary);
+    let int8Array = new Int8Array(binary);
+    int8Array.set([16, -32, 64, -128]);
+
+    let key = IDBKeyRange.lowerBound([int8Array]).lower;
+
+    assert_true(key instanceof Array);
+    assert_true(key[0] instanceof ArrayBuffer);
+    assert_equals(key[0].byteLength, 4);
+
+    let keyInInt8Array = new Int8Array(key[0]);
+
+    for(let i = 0; i < int8Array.length; i++) {
+      assert_equals(keyInInt8Array[i], int8Array[i]);
+    }
+  }, "Array of TypedArray(Int8Array)");
+</script>
+
+<div id=log></div>