VSCode test

extension/test/electron/hover/fixtures/other.scss

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+/// Docstring.
+/// @type String
+$from-other: 'hello';

extension/test/electron/hover/fixtures/styles.sass

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+@use "sass:string"
+@use "other"
+
+$_id: string.unique-id()
+$_prefix: other.$from-other
+
+.card
+  .body:has(:not(.stuff))
+    padding: 4px

extension/test/electron/hover/hover.test.js

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+const assert = require('node:assert');
+const path = require('node:path');
+const vscode = require('vscode');
+const { showFile, sleepCI } = require('../util');
+
+const stylesUri = vscode.Uri.file(
+  path.resolve(__dirname, 'fixtures', 'styles.sass')
+);
+
+before(async () => {
+  await showFile(stylesUri);
+  await sleepCI();
+});
+
+after(async () => {
+  await vscode.commands.executeCommand('workbench.action.closeAllEditors');
+});
+
+/**
+ * @param {import('vscode').Hover[]} hover
+ * @returns {string}
+ */
+function getHoverContents(hover) {
+  return hover
+    .flatMap((item) => {
+      return item.contents.map((content) =>
+        typeof content === 'string' ? content : content.value
+      );
+    })
+    .join('\n');
+}
+
+/**
+ * @param {import('vscode').Uri} documentUri
+ * @param {import('vscode').Position} position
+ * @returns {Promise<import('vscode').Hover[]>}
+ */
+async function hover(documentUri, position) {
+  const result = await vscode.commands.executeCommand(
+    'vscode.executeHoverProvider',
+    documentUri,
+    position
+  );
+  return result;
+}
+
+test('gets hover information from the same document', async () => {
+  const result = await hover(stylesUri, new vscode.Position(7, 10));
+
+  assert.match(
+    getHoverContents(result),
+    /\.card \.body:has\(:not\(\.stuff\)\)/
+  );
+});
+
+test('gets hover information from the workspace', async () => {
+  const result = await hover(stylesUri, new vscode.Position(4, 19));
+
+  assert.match(getHoverContents(result), /Docstring/);
+});
+
+test('gets hover information for Sass built-in', async () => {
+  const result = await hover(stylesUri, new vscode.Position(3, 14));
+
+  assert.match(
+    getHoverContents(result),
+    /Returns a randomly-generated unquoted string/
+  );
+});

extension/test/electron/hover/index.js

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+const path = require('node:path');
+const fs = require('node:fs/promises');
+const vscode = require('vscode');
+const { runMocha } = require('../mocha');
+
+/**
+ * @returns {Promise<void>}
+ */
+async function run() {
+  const filePaths = [];
+
+  const dir = await fs.readdir(__dirname, { withFileTypes: true });
+  for (let entry of dir) {
+    if (entry.isFile() && entry.name.endsWith('test.js')) {
+      filePaths.push(path.join(entry.parentPath, entry.name));
+    }
+  }
+
+  await runMocha(
+    filePaths,
+    vscode.Uri.file(path.resolve(__dirname, 'fixtures', 'styles.sass'))
+  );
+}
+
+module.exports = { run };