chore(code): add smart tab behaviour

packages/codemirror/src/extensions/eslint.spec.ts

@@ -0,0 +1,72 @@
+import { lint as _lint } from "./eslint.js";
+import { trimIndentation } from "@triliumnext/commons";
+import { describe, expect, it } from "vitest";
+
+async function lint(code: string, mimeType: string) {
+    const linterData = await _lint(mimeType);
+    if (!("linter" in linterData)) {
+        return [];
+    }
+    const { linter, config } = linterData;
+    const result = linter.verify(code, config);
+    return result;
+}
+
+describe("Linter", () => {
+    it("reports some basic errors", async () => {
+        const result = await lint(trimIndentation`
+            for (const i = 0; i<10; i++) {
+            }
+        `, "application/javascript;env=frontend");
+        expect(result).toMatchObject([
+            { message: "'i' is constant.", },
+            { message: "Empty block statement." }
+        ]);
+    });
+
+    it("reports no error for correct script", async () => {
+        const result = await lint(trimIndentation`
+            const foo = "bar";
+            console.log(foo.toString());
+            for (const x of [ 1, 2, 3]) {
+                console.log(x?.toString());
+            }
+
+            api.showMessage("Hi");
+        `, "application/javascript;env=frontend");
+        expect(result.length).toBe(0);
+    });
+
+    it("reports unused functions as warnings", async () => {
+        const result = await lint(trimIndentation`
+            function hello() { }
+            function world() { }
+
+            console.log("Hello world");
+        `, "application/javascript;env=frontend");
+        expect(result).toMatchObject([
+            {
+                message: "'hello' is defined but never used.",
+                severity: 1
+            },
+            {
+                message: "'world' is defined but never used.",
+                severity: 1
+            }
+        ]);
+    });
+
+    it("supports JQuery global", async () => {
+        expect(await lint(`$("<div>");`, "application/javascript;env=backend")).toMatchObject([{ "ruleId": "no-undef" }]);
+        expect(await lint(`console.log($("<div>"));`, "application/javascript;env=frontend")).toStrictEqual([]);
+    });
+
+    it("supports module.exports", async () => {
+        expect(await lint(`module.exports("Hi");`, "application/javascript;env=backend")).toStrictEqual([]);
+        expect(await lint(`module.exports("Hi");`, "application/javascript;env=frontend")).toStrictEqual([]);
+    });
+
+    it("ignores TypeScript file", async () => {
+        expect(await lint("export async function lint(code: string, mimeType: string) {}", "text/typescript-jsx")).toStrictEqual([]);
+    });
+});