Release query Tools v0.1.0

tests/core/query.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, it } from "vitest";
+import { parseData } from "../../src/core/data";
+import { runQuery } from "../../src/core/query";
+describe("query engine", () => {
+  const root = parseData(
+    '[{"team":"a","n":2},{"team":"a","n":4},{"team":"b","n":9}]',
+    "json",
+  ).root;
+  it("filters groups aggregates sorts and limits", () => {
+    expect(
+      runQuery(
+        root,
+        "SELECT team, COUNT(*) AS count, AVG(n) AS mean WHERE n >= 2 GROUP BY team ORDER BY mean DESC LIMIT 2",
+        "sql",
+      ).rows,
+    ).toEqual([
+      { team: "b", count: 1, mean: 9 },
+      { team: "a", count: 2, mean: 3 },
+    ]);
+  });
+  it("supports bounded path navigation and filtering", () => {
+    expect(runQuery(root, "$[?(@.n >= 4)].team", "path").value).toEqual([
+      "a",
+      "b",
+    ]);
+  });
+  it("rejects unsupported syntax rather than evaluating it", () => {
+    expect(() => runQuery(root, "SELECT eval(n)", "sql")).toThrow(
+      /Invalid SELECT/iu,
+    );
+    expect(() => runQuery(root, "$..team", "path")).toThrow(
+      /Unsupported path/iu,
+    );
+  });
+});