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Add order-by exercising to the JS test script.

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This commit is contained in:
Richard Newman 2016-10-07 16:08:10 -07:00
parent 4f10100174
commit 630f3e0740
1 changed files with 44 additions and 3 deletions
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47
test/js/tests.js
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@ -21,7 +21,9 @@ var schema = {
async function testOpen() { async function testOpen() {
// Open a database. // Open a database.
let db = await datomish.open("/tmp/testing.db"); let path = "/tmp/testing" + Date.now() + ".db";
console.log("Opening " + path);
let db = await datomish.open(path);
// Make sure we have our current schema. // Make sure we have our current schema.
await db.ensureSchema(schema); await db.ensureSchema(schema);
@ -39,7 +41,7 @@ async function testOpen() {
// A simple query. // A simple query.
let results = await db.q("[:find [?url ...] :in $ :where [?e :page/url ?url]]"); let results = await db.q("[:find [?url ...] :in $ :where [?e :page/url ?url]]");
console.log("Query results: " + JSON.stringify(results)); console.log("Known URLs: " + JSON.stringify(results));
// Let's extend our schema. In the real world this would typically happen // Let's extend our schema. In the real world this would typically happen
// across releases. // across releases.
@ -56,7 +58,7 @@ async function testOpen() {
await db.transact([ await db.transact([
{"db/id": datomish.tempid(), {"db/id": datomish.tempid(),
"page/url": "https://mozilla.org/", "page/url": "https://mozilla.org/",
"page/visitedAt": (new Date())} "page/visitedAt": new Date()}
]); ]);
// When did we most recently visit this page? // When did we most recently visit this page?
@ -69,6 +71,45 @@ async function testOpen() {
{"inputs": {"url": "https://mozilla.org/"}})); {"inputs": {"url": "https://mozilla.org/"}}));
console.log("Most recent visit: " + date); console.log("Most recent visit: " + date);
// Add some more data about a couple of pages.
let start = Date.now();
let lr = datomish.tempid();
let reddit = datomish.tempid();
let res = await db.transact([
{"db/id": reddit,
"page/url": "http://reddit.com/",
"page/title": "Reddit",
"page/visitedAt": new Date(start)},
{"db/id": lr,
"page/url": "https://longreads.com/",
"page/title": "Longreads: The best longform stories on the web",
"page/visitedAt": (new Date(start + 100))},
// Two visits each.
{"db/id": lr,
"page/visitedAt": (new Date(start + 200))},
{"db/id": reddit,
"page/visitedAt": (new Date(start + 300))}
]);
// These are our new persistent IDs. We can use these directly in later
// queries or transactions
lr = res.tempid(lr);
reddit = res.tempid(reddit);
console.log("Persistent IDs are " + lr + ", " + reddit + ".");
// A query with a limit and order-by. Because we limit to 2, and order
// by most recent visit date first, we won't get mozilla.org in our results.
let recent = await db.q(
`[:find ?url (max ?date)
:in $
:where
[?page :page/url ?url]
[?page :page/visitedAt ?date]]`,
{"limit": 2, "order-by": [["_max_date", "desc"]]});
console.log("Recently visited: " + JSON.stringify(recent));
// Close: we're done! // Close: we're done!
await db.close(); await db.close();
} }