From abffe2365bd6a1a64e2011b80cdb4eb77c7fce79 Mon Sep 17 00:00:00 2001
From: holroy <holroy@users.noreply.github.com>
Date: Sun, 12 Jan 2025 18:24:41 +0100
Subject: [PATCH] Added test and documentation for DQL - unique()

Added documentation and some simple tests for the DQL function unique() which was missing.
---
 docs/docs/reference/functions.md      | 8 ++++++++
 src/test/function/aggregation.test.ts | 7 +++++++
 2 files changed, 15 insertions(+)

diff --git a/docs/docs/reference/functions.md b/docs/docs/reference/functions.md
index 0908d10b..be7bc75f 100644
--- a/docs/docs/reference/functions.md
+++ b/docs/docs/reference/functions.md
@@ -512,6 +512,14 @@ filter([1, 2, 3], (x) => x >= 2) = [2, 3]
 filter(["yes", "no", "yas"], (x) => startswith(x, "y")) = ["yes", "yas"]
 ```
 
+### `unique(array)`
+
+Creates a new array with only unique values. 
+
+```js
+unique([1, 3, 7, 3, 1]) => [1, 3, 7]
+```
+
 ### `map(array, func)`
 
 Applies the function to each element in the array, returning a list of the mapped results.
diff --git a/src/test/function/aggregation.test.ts b/src/test/function/aggregation.test.ts
index 4da1986d..c33089d2 100644
--- a/src/test/function/aggregation.test.ts
+++ b/src/test/function/aggregation.test.ts
@@ -11,6 +11,13 @@ describe("filter()", () => {
     test("number list", () => expectEvals("filter(list(1, 2, 3), (k) => k >= 2)", [2, 3]));
 });
 
+describe("unique()", () => {
+    test("empty", () => expectEvals("unique([])", []));
+    test("single", () => expectEvals("unique([1])", [1]));
+    test("multiple unique", () => expectEvals("unique([1, 1, 1])", [1]));
+    test("multiple same", () => expectEvals("unique([1, 3, 7, 3, 1])", [1, 3, 7]));
+});
+
 describe("min()", () => {
     test("empty", () => expectEvals("min()", null));
     test("single", () => expectEvals("min(6)", 6));