From ffc6dac172c0f2d612cd3482616ba3df5396a280 Mon Sep 17 00:00:00 2001
From: Bruno Charest <bruno.charest@gmail.com>
Date: Thu, 28 May 2026 18:46:10 -0400
Subject: [PATCH] =?UTF-8?q?feat:=20frontend=20tests=20=E2=80=94=20import/e?=
 =?UTF-8?q?xport=20validator=20+=20unit=20tests=20+=20CI=20integration?=
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- tests/frontend/validate-imports.mjs: 0 errors on 13 modules, 79 exports
  Detects: missing exports, broken imports, const reassignments
- tests/frontend/unit.test.mjs: escapeHtml, state object, module syntax
- Added to CI lint job (runs after Ruff + Mypy)
---
 .gitea/workflows/ci.yml             |   6 +
 frontend/js/legacy.js               |   8 +-
 tests/frontend/unit.test.mjs        | 149 ++++++++++++++++++++++
 tests/frontend/validate-imports.mjs | 191 ++++++++++++++++++++++++++++
 4 files changed, 350 insertions(+), 4 deletions(-)
 create mode 100644 tests/frontend/unit.test.mjs
 create mode 100644 tests/frontend/validate-imports.mjs

diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 21eadef..c14e587 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -32,6 +32,12 @@ jobs:
       - name: Mypy (type checker)
         run: mypy backend/ --ignore-missing-imports || echo "mypy found type errors (advisory — 28 pre-existing issues)"
 
+      - name: Frontend validation
+        run: node tests/frontend/validate-imports.mjs
+
+      - name: Frontend unit tests
+        run: node tests/frontend/unit.test.mjs
+
   # ── Tests ─────────────────────────────────────────────────────────
   test:
     needs: lint
diff --git a/frontend/js/legacy.js b/frontend/js/legacy.js
index 3f6b7f4..a820873 100644
--- a/frontend/js/legacy.js
+++ b/frontend/js/legacy.js
@@ -44,7 +44,7 @@ function hideProgressBar() {
 // loadVaultSettings
 // =========================================================================
 
-async function loadVaultSettings() {
+export async function loadVaultSettings() {
   try {
     const settings = await api("/api/vaults/settings/all");
     state.vaultSettings = settings;
@@ -84,7 +84,7 @@ function _isInputFocused() {
 // initSearch
 // =========================================================================
 
-function initSearch() {
+export function initSearch() {
   const input = document.getElementById("search-input");
   if (!input) return;
   const caseBtn = document.getElementById("search-case-btn");
@@ -309,7 +309,7 @@ function initSearch() {
 // showWelcome
 // =========================================================================
 
-function showWelcome() {
+export function showWelcome() {
   hideProgressBar();
 
   // Restore or rebuild the dashboard with tabbed sections
@@ -422,7 +422,7 @@ function showWelcome() {
 // goHome
 // =========================================================================
 
-function goHome() {
+export function goHome() {
   const searchInput = document.getElementById("search-input");
   if (searchInput) searchInput.value = "";
 
diff --git a/tests/frontend/unit.test.mjs b/tests/frontend/unit.test.mjs
new file mode 100644
index 0000000..39be6ce
--- /dev/null
+++ b/tests/frontend/unit.test.mjs
@@ -0,0 +1,149 @@
+#!/usr/bin/env node
+/**
+ * ObsiGate — Frontend unit tests (pure functions, no DOM required).
+ * Usage: node tests/frontend/unit.test.mjs
+ */
+
+import { strict as assert } from 'assert';
+
+// ── Test escapeHtml (from utils.js) ────────────────────────────────────────
+// We test the logic directly since utils.js imports from state.js which needs DOM
+const escapeHtml = (str) => {
+  if (!str) return '';
+  return String(str).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;');
+};
+
+function testEscapeHtml() {
+  assert.strictEqual(escapeHtml(''), '');
+  assert.strictEqual(escapeHtml(null), '');
+  assert.strictEqual(escapeHtml(undefined), '');
+  assert.strictEqual(escapeHtml('hello'), 'hello');
+  assert.strictEqual(escapeHtml('<script>'), '&lt;script&gt;');
+  assert.strictEqual(escapeHtml('a & b'), 'a &amp; b');
+  assert.strictEqual(escapeHtml('"quoted"'), '&quot;quoted&quot;');
+  assert.strictEqual(escapeHtml('<a href="x">&</a>'), '&lt;a href=&quot;x&quot;&gt;&amp;&lt;/a&gt;');
+  console.log('  ✓ escapeHtml');
+}
+
+// ── Test state object structure ────────────────────────────────────────────
+// Replicate state.js structure for testing
+const expectedStateKeys = [
+  'APP_VERSION', 'currentVault', 'currentPath', 'allVaults', 'selectedContextVault',
+  'searchTimeout', 'searchAbortController', 'advancedSearchOffset', 'advancedSearchTotal',
+  'advancedSearchSort', 'advancedSearchLastQuery', 'suggestAbortController',
+  'dropdownActiveIndex', 'dropdownItems', 'currentSearchId', 'selectedTags',
+  'searchCaseSensitive', 'searchWholeWord', 'searchRegex', 'searchFilterVisible',
+  'SEARCH_HISTORY_KEY', 'MAX_HISTORY_ENTRIES', 'SUGGEST_DEBOUNCE_MS',
+  'ADVANCED_SEARCH_LIMIT', 'MIN_SEARCH_LENGTH', 'SEARCH_TIMEOUT_MS',
+  'showingSource', 'cachedRawSource', 'editorView', 'editorVault', 'editorPath',
+  'fallbackEditorEl', '_iconDebounceTimer', 'outlineObserver', 'activeHeadingId',
+  'headingsCache', 'rightSidebarVisible', 'rightSidebarWidth',
+  'sidebarFilterCaseSensitive', 'activeSidebarTab', 'filterDebounce', 'vaultSettings',
+];
+
+function testStateKeys() {
+  const state = {
+    APP_VERSION: "1.5.0", currentVault: null, currentPath: null, allVaults: [],
+    selectedContextVault: "all", searchTimeout: null, searchAbortController: null,
+    advancedSearchOffset: 0, advancedSearchTotal: 0, advancedSearchSort: "relevance",
+    advancedSearchLastQuery: "", suggestAbortController: null, dropdownActiveIndex: -1,
+    dropdownItems: [], currentSearchId: 0, selectedTags: [], searchCaseSensitive: false,
+    searchWholeWord: false, searchRegex: false, searchFilterVisible: false,
+    SEARCH_HISTORY_KEY: "obsigate_search_history", MAX_HISTORY_ENTRIES: 50,
+    SUGGEST_DEBOUNCE_MS: 150, ADVANCED_SEARCH_LIMIT: 50, MIN_SEARCH_LENGTH: 2,
+    SEARCH_TIMEOUT_MS: 30000, showingSource: false, cachedRawSource: null,
+    editorView: null, editorVault: null, editorPath: null, fallbackEditorEl: null,
+    _iconDebounceTimer: null, outlineObserver: null, activeHeadingId: null,
+    headingsCache: [], rightSidebarVisible: true, rightSidebarWidth: 280,
+    sidebarFilterCaseSensitive: false, activeSidebarTab: "vaults", filterDebounce: null,
+    vaultSettings: {},
+  };
+
+  for (const key of expectedStateKeys) {
+    assert.ok(key in state, `State key missing: ${key}`);
+  }
+
+  // Verify mutability
+  state.currentVault = 'test';
+  assert.strictEqual(state.currentVault, 'test');
+  state.rightSidebarVisible = false;
+  assert.strictEqual(state.rightSidebarVisible, false);
+
+  console.log('  ✓ state object — all %d keys present and mutable', expectedStateKeys.length);
+}
+
+// ── Test module file structure ─────────────────────────────────────────────
+import { readdirSync, readFileSync } from 'fs';
+import { join, dirname } from 'path';
+import { fileURLToPath } from 'url';
+import { execSync } from 'child_process';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const JS_DIR = join(__dirname, '../../frontend/js');
+
+function testAllModulesParse() {
+  const files = readdirSync(JS_DIR).filter(f => f.endsWith('.js') && f !== 'sidebar_raw.js');
+  let ok = 0, fail = 0;
+
+  for (const file of files) {
+    try {
+      execSync(`node --check "${join(JS_DIR, file)}"`, { stdio: 'pipe' });
+      ok++;
+    } catch {
+      console.error(`    ✗ ${file} — syntax error`);
+      fail++;
+    }
+  }
+
+  assert.strictEqual(fail, 0, `${fail} module(s) have syntax errors`);
+  console.log(`  ✓ All ${ok} modules parse without syntax errors`);
+}
+
+function testModulesHaveImports() {
+  const files = readdirSync(JS_DIR).filter(f => f.endsWith('.js') && f !== 'sidebar_raw.js');
+  const expected = [
+    { file: 'state.js', reason: 'export-only module' },
+  ];
+  const expectNoImport = new Set(expected.map(e => e.file));
+
+  for (const file of files) {
+    const content = readFileSync(join(JS_DIR, file), 'utf-8');
+    const hasExport = /^export\s/m.test(content);
+    const hasImport = /^import\s/m.test(content);
+
+    if (!expectNoImport.has(file)) {
+      assert.ok(hasImport, `${file} should have at least one import`);
+    }
+    if (file !== 'state.js' && file !== 'app.js') {
+      assert.ok(hasExport, `${file} should have at least one export`);
+    }
+  }
+  console.log('  ✓ All modules have imports and exports (except state.js)');
+}
+
+// ── Run all tests ──────────────────────────────────────────────────────────
+async function main() {
+  let passed = 0, failed = 0;
+
+  const tests = [
+    ['escapeHtml', testEscapeHtml],
+    ['state keys', testStateKeys],
+    ['module syntax', testAllModulesParse],
+    ['module structure', testModulesHaveImports],
+  ];
+
+  for (const [name, fn] of tests) {
+    try {
+      fn();
+      passed++;
+    } catch (err) {
+      console.error(`  ✗ ${name}: ${err.message}`);
+      failed++;
+    }
+  }
+
+  console.log(`\n${passed} passed, ${failed} failed`);
+  process.exit(failed > 0 ? 1 : 0);
+}
+
+main();
diff --git a/tests/frontend/validate-imports.mjs b/tests/frontend/validate-imports.mjs
new file mode 100644
index 0000000..d09375a
--- /dev/null
+++ b/tests/frontend/validate-imports.mjs
@@ -0,0 +1,191 @@
+#!/usr/bin/env node
+/**
+ * ObsiGate — Frontend import/export validator.
+ * Runs in CI to catch missing exports, broken imports, and syntax errors.
+ * Usage: node tests/frontend/validate-imports.mjs
+ */
+
+import { readFileSync, readdirSync } from 'fs';
+import { join, dirname } from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+const JS_DIR = join(__dirname, '../../frontend/js');
+
+// ── Step 1: Collect all exports from every module ──────────────────────────
+const allExports = {};
+
+function collectExports(filePath, modName) {
+  const content = readFileSync(filePath, 'utf-8');
+  const lines = content.split('\n');
+  const exports = new Set();
+
+  // Handle multi-line export { ... } blocks
+  let inExportBlock = false;
+  let exportBlockText = '';
+
+  for (const line of lines) {
+    // Start of multi-line export block
+    if (/^export\s*\{/.test(line) && !/\}/.test(line)) {
+      inExportBlock = true;
+      exportBlockText = line;
+      continue;
+    }
+    if (inExportBlock) {
+      exportBlockText += ' ' + line.trim();
+      if (/\}/.test(line)) {
+        inExportBlock = false;
+        const m = exportBlockText.match(/^export\s*\{([^}]+)\}/);
+        if (m) {
+          for (const name of m[1].split(',')) {
+            const n = name.trim().replace(/\s+as\s+\w+.*/, '').trim();
+            if (n && n !== '') exports.add(n);
+          }
+        }
+        exportBlockText = '';
+      }
+      continue;
+    }
+
+    // export const/let/function/async function X
+    let m = line.match(/^export\s+(?:const|let|function|async\s+function|class)\s+(\w+)/);
+    if (m) exports.add(m[1]);
+
+    // Single-line export { a, b }
+    m = line.match(/^export\s*\{([^}]+)\}/);
+    if (m) {
+      for (const name of m[1].split(',')) {
+        const n = name.trim().replace(/\s+as\s+.*/, '');
+        if (n) exports.add(n);
+      }
+    }
+
+    // export { a } from './x.js'
+    m = line.match(/^export\s*\{([^}]+)\}\s*from\s*['"]\.\/(\w+\.js)['"]/);
+    if (m) {
+      const source = m[2];
+      for (const name of m[1].split(',')) {
+        const n = name.trim().replace(/\s+as\s+.*/, '').trim();
+        if (n) exports.add(n);
+      }
+      // Re-exports: verify source actually exports these
+      if (allExports[source]) {
+        for (const name of m[1].split(',')) {
+          const n = name.trim().replace(/\s+as\s+.*/, '').trim();
+          if (n && !allExports[source].has(n)) {
+            errors.push(`${modName}: re-exports '${n}' but ${source} doesn't export it`);
+          }
+        }
+      }
+    }
+  }
+
+  allExports[modName] = exports;
+}
+
+// ── Step 2: Check all imports resolve to actual exports ────────────────────
+const errors = [];
+
+function checkImports(filePath, modName) {
+  const content = readFileSync(filePath, 'utf-8');
+  const lines = content.split('\n');
+
+  for (const line of lines) {
+    // import { a, b } from './source.js'
+    let m = line.match(/^import\s*\{([^}]+)\}\s*from\s*['"]\.\/(\w+\.js)['"]/);
+    if (m) {
+      const source = m[2];
+      const names = m[1].split(',').map(n => n.trim().split(/\s+as\s+/)[0].trim());
+
+      if (!allExports[source]) {
+        errors.push(`${modName}: imports from ${source} but couldn't read that file`);
+        continue;
+      }
+
+      for (const name of names) {
+        if (!allExports[source].has(name)) {
+          errors.push(`${modName}: imports '${name}' from ${source} but it's NOT exported`);
+        }
+      }
+    }
+
+    // import * as NS from './source.js'
+    m = line.match(/^import\s+\*\s+as\s+(\w+)\s+from\s*['"]\.\/(\w+\.js)['"]/);
+    if (m) {
+      const ns = m[1];
+      const source = m[2];
+
+      if (!allExports[source]) {
+        errors.push(`${modName}: namespace imports from ${source} but couldn't read that file`);
+        continue;
+      }
+
+      // Check all NS.xxx usages in this file
+      const nsUsage = new RegExp(`\\b${ns}\\.(\\w+)`, 'g');
+      let usageMatch;
+      while ((usageMatch = nsUsage.exec(content)) !== null) {
+        const accessed = usageMatch[1];
+        if (!allExports[source].has(accessed)) {
+          errors.push(`${modName}: uses ${ns}.${accessed} but ${source} doesn't export '${accessed}'`);
+        }
+      }
+    }
+  }
+}
+
+// ── Main ───────────────────────────────────────────────────────────────────
+const files = readdirSync(JS_DIR).filter(f => f.endsWith('.js') && f !== 'sidebar_raw.js');
+
+// Phase 1: collect all exports
+for (const file of files) {
+  collectExports(join(JS_DIR, file), file);
+}
+
+// Phase 2: verify all imports
+for (const file of files) {
+  checkImports(join(JS_DIR, file), file);
+}
+
+// ── Step 3: Check for const reassignment patterns ──────────────────────────
+for (const file of files) {
+  const content = readFileSync(join(JS_DIR, file), 'utf-8');
+  const lines = content.split('\n');
+
+  // Find all imported names
+  const importedNames = new Set();
+  for (const line of lines) {
+    const m = line.match(/^import\s*\{([^}]+)\}\s*from/);
+    if (m) {
+      for (const name of m[1].split(',')) {
+        importedNames.add(name.trim().split(/\s+as\s+/)[0].trim());
+      }
+    }
+  }
+
+  // Check if any imported name is reassigned
+  for (const line of lines) {
+    for (const name of importedNames) {
+      // Check for: name = (not ===, !==, ==, !=)
+      if (new RegExp(`^\\s*${name}\\s*=[^=]`).test(line) ||
+          new RegExp(`^\\s*${name}\\s*=\\s*function`).test(line) ||
+          new RegExp(`^\\s*${name}\\s*=\\s*async`).test(line) ||
+          new RegExp(`^\\s*${name}\\s*=\\s*\\{`).test(line) ||
+          new RegExp(`^\\s*${name}\\s*=\\s*\\[`).test(line)) {
+        errors.push(`${file}:${lines.indexOf(line) + 1} — imported '${name}' is reassigned (const violation)`);
+      }
+    }
+  }
+}
+
+// ── Report ─────────────────────────────────────────────────────────────────
+if (errors.length > 0) {
+  console.error(`\n❌ ${errors.length} frontend validation error(s):\n`);
+  for (const err of errors) {
+    console.error(`  • ${err}`);
+  }
+  console.error('');
+  process.exit(1);
+} else {
+  console.log(`✅ All ${files.length} modules validated — ${Object.values(allExports).reduce((s, e) => s + e.size, 0)} exports, 0 errors`);
+  process.exit(0);
+}