fallow_extract/
html.rs

1//! HTML file parsing for script, stylesheet, and Angular template references.
2//!
3//! Extracts `<script src="...">` and `<link rel="stylesheet" href="...">` references
4//! from HTML files, creating graph edges so that referenced JS/CSS assets (and their
5//! transitive imports) are reachable from the HTML entry point.
6//!
7//! Also scans for Angular template syntax (`{{ }}`, `[prop]`, `(event)`, `@if`, etc.)
8//! and stores referenced identifiers as `MemberAccess` entries with a sentinel object,
9//! enabling the analysis phase to credit component class members used in external templates.
10
11use std::path::Path;
12use std::sync::LazyLock;
13
14use oxc_span::Span;
15
16use crate::asset_url::normalize_asset_url;
17use crate::sfc_template::angular::{self, ANGULAR_TPL_SENTINEL};
18use crate::{ImportInfo, ImportedName, MemberAccess, ModuleInfo};
19use fallow_types::discover::FileId;
20
21/// Regex to match HTML comments (`<!-- ... -->`) for stripping before extraction.
22static HTML_COMMENT_RE: LazyLock<regex::Regex> =
23    LazyLock::new(|| regex::Regex::new(r"(?s)<!--.*?-->").expect("valid regex"));
24
25/// Regex to extract `src` attribute from `<script>` tags.
26/// Matches both `<script src="...">` and `<script type="module" src="...">`.
27/// Uses `(?s)` so `.` matches newlines (multi-line attributes).
28static SCRIPT_SRC_RE: LazyLock<regex::Regex> = LazyLock::new(|| {
29    regex::Regex::new(r#"(?si)<script\b(?:[^>"']|"[^"]*"|'[^']*')*?\bsrc\s*=\s*["']([^"']+)["']"#)
30        .expect("valid regex")
31});
32
33/// Regex to extract `href` attribute from `<link>` tags with `rel="stylesheet"` or
34/// `rel="modulepreload"`.
35/// Handles attributes in any order (rel before or after href).
36static LINK_HREF_RE: LazyLock<regex::Regex> = LazyLock::new(|| {
37    regex::Regex::new(
38        r#"(?si)<link\b(?:[^>"']|"[^"]*"|'[^']*')*?\brel\s*=\s*["'](stylesheet|modulepreload)["'](?:[^>"']|"[^"]*"|'[^']*')*?\bhref\s*=\s*["']([^"']+)["']"#,
39    )
40    .expect("valid regex")
41});
42
43/// Regex for the reverse attribute order: href before rel.
44static LINK_HREF_REVERSE_RE: LazyLock<regex::Regex> = LazyLock::new(|| {
45    regex::Regex::new(
46        r#"(?si)<link\b(?:[^>"']|"[^"]*"|'[^']*')*?\bhref\s*=\s*["']([^"']+)["'](?:[^>"']|"[^"]*"|'[^']*')*?\brel\s*=\s*["'](stylesheet|modulepreload)["']"#,
47    )
48    .expect("valid regex")
49});
50
51/// Check if a path is an HTML file.
52// Keep in sync with fallow_core::analyze::predicates::is_html_file (crate boundary prevents sharing)
53pub(crate) fn is_html_file(path: &Path) -> bool {
54    path.extension()
55        .and_then(|e| e.to_str())
56        .is_some_and(|ext| ext == "html")
57}
58
59/// Returns true if an HTML asset reference is a remote URL that should be skipped.
60pub(crate) fn is_remote_url(src: &str) -> bool {
61    src.starts_with("http://")
62        || src.starts_with("https://")
63        || src.starts_with("//")
64        || src.starts_with("data:")
65}
66
67/// Build-time template placeholders that aren't valid import specifiers and
68/// never resolve to a real file. Skip them at extraction time so they don't
69/// enter the import graph as unresolvable specifiers.
70///
71/// - `{{ ... }}` covers Handlebars (Ember `index.html`'s `{{rootURL}}`,
72///   `{{config.assetsPath}}`), Mustache (Jekyll, Hugo), Jinja2 (Pelican /
73///   11ty plugins), and pre-compiled Vue / Angular templates whose
74///   interpolation has leaked into a checked-in HTML scaffold.
75/// - `###...###` covers ember-cli blueprint scaffold placeholders
76///   (`###APPNAME###`, `###DUMMY###`) checked in as addon-fixture templates.
77///
78/// Neither shape is a legal URL or path character outside template engines,
79/// so the skip is generic across frameworks rather than gated on a plugin.
80/// Returns `true` for any `src` / `href` value that contains either marker.
81pub(crate) fn is_template_placeholder(value: &str) -> bool {
82    value.contains("{{") || value.contains("###")
83}
84
85/// Extract local (non-remote) asset references from HTML-like markup.
86///
87/// Returns the raw `src`/`href` strings (trimmed, remote URLs filtered). Shared
88/// between the HTML file parser and the JS/TS visitor's tagged template
89/// literal override so `` html`<script src="...">` `` in Hono/lit-html/htm
90/// layouts emits the same asset edges as a real `.html` file.
91pub(crate) fn collect_asset_refs(source: &str) -> Vec<String> {
92    let stripped = HTML_COMMENT_RE.replace_all(source, "");
93    let mut refs: Vec<String> = Vec::new();
94
95    for cap in SCRIPT_SRC_RE.captures_iter(&stripped) {
96        if let Some(m) = cap.get(1) {
97            let src = m.as_str().trim();
98            if !src.is_empty() && !is_remote_url(src) && !is_template_placeholder(src) {
99                refs.push(src.to_string());
100            }
101        }
102    }
103
104    for cap in LINK_HREF_RE.captures_iter(&stripped) {
105        if let Some(m) = cap.get(2) {
106            let href = m.as_str().trim();
107            if !href.is_empty() && !is_remote_url(href) && !is_template_placeholder(href) {
108                refs.push(href.to_string());
109            }
110        }
111    }
112    for cap in LINK_HREF_REVERSE_RE.captures_iter(&stripped) {
113        if let Some(m) = cap.get(1) {
114            let href = m.as_str().trim();
115            if !href.is_empty() && !is_remote_url(href) && !is_template_placeholder(href) {
116                refs.push(href.to_string());
117            }
118        }
119    }
120
121    refs
122}
123
124/// Parse an HTML file, extracting script and stylesheet references as imports.
125#[cfg(test)]
126pub(crate) fn parse_html_to_module(file_id: FileId, source: &str, content_hash: u64) -> ModuleInfo {
127    parse_html_to_module_with_complexity(file_id, source, content_hash, false)
128}
129
130/// Parse an HTML file and optionally compute Angular template complexity.
131pub(crate) fn parse_html_to_module_with_complexity(
132    file_id: FileId,
133    source: &str,
134    content_hash: u64,
135    need_complexity: bool,
136) -> ModuleInfo {
137    let parsed_suppressions = crate::suppress::parse_suppressions_from_source(source);
138
139    // Bare filenames (e.g., `src="app.js"`) are normalized to `./app.js` so
140    // the resolver doesn't misclassify them as npm packages.
141    let mut imports: Vec<ImportInfo> = collect_asset_refs(source)
142        .into_iter()
143        .map(|raw| ImportInfo {
144            source: normalize_asset_url(&raw),
145            imported_name: ImportedName::SideEffect,
146            local_name: String::new(),
147            is_type_only: false,
148            from_style: false,
149            span: Span::default(),
150            source_span: Span::default(),
151        })
152        .collect();
153
154    // Deduplicate: the same asset may be referenced by both <script src> and
155    // <link rel="modulepreload" href> for the same path.
156    imports.sort_unstable_by(|a, b| a.source.cmp(&b.source));
157    imports.dedup_by(|a, b| a.source == b.source);
158
159    // Scan for Angular template syntax ({{ }}, [prop], (event), @if, etc.).
160    //
161    // Bare identifier refs (e.g. `title`, `dataService`, pipe names) are stored
162    // as `MemberAccess` entries with a sentinel object name so the analysis
163    // phase can credit them as members of the component class.
164    //
165    // Static member-access chains (`dataService.getTotal`) where `dataService`
166    // is an unresolved identifier are stored as regular (non-sentinel)
167    // `MemberAccess` entries. The analysis phase resolves these through the
168    // importing component's typed instance bindings (from
169    // `ClassHeritageInfo.instance_bindings`) to credit the target class's
170    // member as used.
171    let template_refs = angular::collect_angular_template_refs(source);
172    let mut member_accesses: Vec<MemberAccess> = template_refs
173        .identifiers
174        .into_iter()
175        .map(|name| MemberAccess {
176            object: ANGULAR_TPL_SENTINEL.to_string(),
177            member: name,
178        })
179        .collect();
180    member_accesses.extend(template_refs.member_accesses);
181
182    let complexity = if need_complexity {
183        crate::template_complexity::compute_angular_template_complexity(source)
184            .into_iter()
185            .collect()
186    } else {
187        Vec::new()
188    };
189
190    ModuleInfo {
191        file_id,
192        exports: Vec::new(),
193        imports,
194        re_exports: Vec::new(),
195        dynamic_imports: Vec::new(),
196        dynamic_import_patterns: Vec::new(),
197        require_calls: Vec::new(),
198        member_accesses,
199        whole_object_uses: Vec::new(),
200        has_cjs_exports: false,
201        has_angular_component_template_url: false,
202        content_hash,
203        suppressions: parsed_suppressions.suppressions,
204        unknown_suppression_kinds: parsed_suppressions.unknown_kinds,
205        unused_import_bindings: Vec::new(),
206        type_referenced_import_bindings: Vec::new(),
207        value_referenced_import_bindings: Vec::new(),
208        line_offsets: fallow_types::extract::compute_line_offsets(source),
209        complexity,
210        flag_uses: Vec::new(),
211        class_heritage: vec![],
212        local_type_declarations: Vec::new(),
213        public_signature_type_references: Vec::new(),
214        namespace_object_aliases: Vec::new(),
215        iconify_prefixes: Vec::new(),
216    }
217}
218
219#[cfg(test)]
220mod tests {
221    use super::*;
222
223    // ── is_html_file ─────────────────────────────────────────────
224
225    #[test]
226    fn is_html_file_html() {
227        assert!(is_html_file(Path::new("index.html")));
228    }
229
230    #[test]
231    fn is_html_file_nested() {
232        assert!(is_html_file(Path::new("pages/about.html")));
233    }
234
235    #[test]
236    fn is_html_file_rejects_htm() {
237        assert!(!is_html_file(Path::new("index.htm")));
238    }
239
240    #[test]
241    fn is_html_file_rejects_js() {
242        assert!(!is_html_file(Path::new("app.js")));
243    }
244
245    #[test]
246    fn is_html_file_rejects_ts() {
247        assert!(!is_html_file(Path::new("app.ts")));
248    }
249
250    #[test]
251    fn is_html_file_rejects_vue() {
252        assert!(!is_html_file(Path::new("App.vue")));
253    }
254
255    // ── is_remote_url ────────────────────────────────────────────
256
257    #[test]
258    fn remote_url_http() {
259        assert!(is_remote_url("http://example.com/script.js"));
260    }
261
262    #[test]
263    fn remote_url_https() {
264        assert!(is_remote_url("https://cdn.example.com/style.css"));
265    }
266
267    #[test]
268    fn remote_url_protocol_relative() {
269        assert!(is_remote_url("//cdn.example.com/lib.js"));
270    }
271
272    #[test]
273    fn remote_url_data() {
274        assert!(is_remote_url("data:text/javascript;base64,abc"));
275    }
276
277    #[test]
278    fn local_relative_not_remote() {
279        assert!(!is_remote_url("./src/entry.js"));
280    }
281
282    #[test]
283    fn local_root_relative_not_remote() {
284        assert!(!is_remote_url("/src/entry.js"));
285    }
286
287    // ── parse_html_to_module: script src extraction ──────────────
288
289    #[test]
290    fn extracts_module_script_src() {
291        let info = parse_html_to_module(
292            FileId(0),
293            r#"<script type="module" src="./src/entry.js"></script>"#,
294            0,
295        );
296        assert_eq!(info.imports.len(), 1);
297        assert_eq!(info.imports[0].source, "./src/entry.js");
298    }
299
300    #[test]
301    fn extracts_plain_script_src() {
302        let info = parse_html_to_module(
303            FileId(0),
304            r#"<script src="./src/polyfills.js"></script>"#,
305            0,
306        );
307        assert_eq!(info.imports.len(), 1);
308        assert_eq!(info.imports[0].source, "./src/polyfills.js");
309    }
310
311    #[test]
312    fn extracts_multiple_scripts() {
313        let info = parse_html_to_module(
314            FileId(0),
315            r#"
316            <script type="module" src="./src/entry.js"></script>
317            <script src="./src/polyfills.js"></script>
318            "#,
319            0,
320        );
321        assert_eq!(info.imports.len(), 2);
322    }
323
324    #[test]
325    fn skips_inline_script() {
326        let info = parse_html_to_module(FileId(0), r#"<script>console.log("hello");</script>"#, 0);
327        assert!(info.imports.is_empty());
328    }
329
330    #[test]
331    fn skips_handlebars_placeholder_in_script_src() {
332        // Ember `app/index.html` references assets via `{{rootURL}}` /
333        // `{{config.assetsPath}}`, which ember-cli rewrites at build time.
334        // The raw specifier is never a real path, so the HTML asset scanner
335        // must skip it instead of seeding an unresolvable import. Same for
336        // any other Handlebars/Mustache/Jinja2-using site that ships a
337        // checked-in `index.html` template.
338        let info = parse_html_to_module(
339            FileId(0),
340            r#"<script src="{{rootURL}}assets/app.js"></script>
341               <script src="{{config.assetsPath}}vendor.js"></script>"#,
342            0,
343        );
344        assert!(
345            info.imports.is_empty(),
346            "Handlebars-placeholder script srcs should not enter the import graph; got {:?}",
347            info.imports
348        );
349    }
350
351    #[test]
352    fn skips_handlebars_placeholder_in_link_href() {
353        // Same protection for stylesheet / modulepreload `href`s.
354        let info = parse_html_to_module(
355            FileId(0),
356            r#"<link rel="stylesheet" href="{{rootURL}}assets/app.css">"#,
357            0,
358        );
359        assert!(info.imports.is_empty());
360    }
361
362    #[test]
363    fn skips_ember_cli_blueprint_placeholder() {
364        // ember-cli blueprint scaffolds carry `###APPNAME###` / `###DUMMY###`
365        // placeholders in checked-in addon-fixture HTML.
366        let info = parse_html_to_module(
367            FileId(0),
368            r####"<script src="###APPNAME###/app.js"></script>"####,
369            0,
370        );
371        assert!(info.imports.is_empty());
372    }
373
374    #[test]
375    fn extracts_normal_specifier_alongside_placeholders() {
376        // Mixed-mode: a real specifier still extracts even when sibling
377        // specifiers contain template placeholders. Guards against the
378        // filter accidentally short-circuiting the whole scan.
379        let info = parse_html_to_module(
380            FileId(0),
381            r#"<script src="{{rootURL}}assets/app.js"></script>
382               <script src="./src/main.ts"></script>"#,
383            0,
384        );
385        assert_eq!(info.imports.len(), 1);
386        assert_eq!(info.imports[0].source, "./src/main.ts");
387    }
388
389    #[test]
390    fn skips_remote_script() {
391        let info = parse_html_to_module(
392            FileId(0),
393            r#"<script src="https://cdn.example.com/lib.js"></script>"#,
394            0,
395        );
396        assert!(info.imports.is_empty());
397    }
398
399    #[test]
400    fn skips_protocol_relative_script() {
401        let info = parse_html_to_module(
402            FileId(0),
403            r#"<script src="//cdn.example.com/lib.js"></script>"#,
404            0,
405        );
406        assert!(info.imports.is_empty());
407    }
408
409    // ── parse_html_to_module: link href extraction ───────────────
410
411    #[test]
412    fn extracts_stylesheet_link() {
413        let info = parse_html_to_module(
414            FileId(0),
415            r#"<link rel="stylesheet" href="./src/global.css" />"#,
416            0,
417        );
418        assert_eq!(info.imports.len(), 1);
419        assert_eq!(info.imports[0].source, "./src/global.css");
420    }
421
422    #[test]
423    fn extracts_modulepreload_link() {
424        let info = parse_html_to_module(
425            FileId(0),
426            r#"<link rel="modulepreload" href="./src/vendor.js" />"#,
427            0,
428        );
429        assert_eq!(info.imports.len(), 1);
430        assert_eq!(info.imports[0].source, "./src/vendor.js");
431    }
432
433    #[test]
434    fn extracts_link_with_reversed_attrs() {
435        let info = parse_html_to_module(
436            FileId(0),
437            r#"<link href="./src/global.css" rel="stylesheet" />"#,
438            0,
439        );
440        assert_eq!(info.imports.len(), 1);
441        assert_eq!(info.imports[0].source, "./src/global.css");
442    }
443
444    // ── Bare asset references normalized to relative paths ──────
445    // Regression tests for the same class of bug as #99 (Angular templateUrl).
446    // Browsers resolve `src="app.js"` and `href="styles.css"` relative to the
447    // HTML file, so emitting these as bare specifiers would misclassify them
448    // as unlisted npm packages.
449
450    #[test]
451    fn bare_script_src_normalized_to_relative() {
452        let info = parse_html_to_module(FileId(0), r#"<script src="app.js"></script>"#, 0);
453        assert_eq!(info.imports.len(), 1);
454        assert_eq!(info.imports[0].source, "./app.js");
455    }
456
457    #[test]
458    fn bare_module_script_src_normalized_to_relative() {
459        let info = parse_html_to_module(
460            FileId(0),
461            r#"<script type="module" src="main.ts"></script>"#,
462            0,
463        );
464        assert_eq!(info.imports.len(), 1);
465        assert_eq!(info.imports[0].source, "./main.ts");
466    }
467
468    #[test]
469    fn bare_stylesheet_link_href_normalized_to_relative() {
470        let info = parse_html_to_module(
471            FileId(0),
472            r#"<link rel="stylesheet" href="styles.css" />"#,
473            0,
474        );
475        assert_eq!(info.imports.len(), 1);
476        assert_eq!(info.imports[0].source, "./styles.css");
477    }
478
479    #[test]
480    fn bare_link_href_reversed_attrs_normalized_to_relative() {
481        let info = parse_html_to_module(
482            FileId(0),
483            r#"<link href="styles.css" rel="stylesheet" />"#,
484            0,
485        );
486        assert_eq!(info.imports.len(), 1);
487        assert_eq!(info.imports[0].source, "./styles.css");
488    }
489
490    #[test]
491    fn bare_modulepreload_link_href_normalized_to_relative() {
492        let info = parse_html_to_module(
493            FileId(0),
494            r#"<link rel="modulepreload" href="vendor.js" />"#,
495            0,
496        );
497        assert_eq!(info.imports.len(), 1);
498        assert_eq!(info.imports[0].source, "./vendor.js");
499    }
500
501    #[test]
502    fn bare_asset_with_subdir_normalized_to_relative() {
503        let info = parse_html_to_module(FileId(0), r#"<script src="assets/app.js"></script>"#, 0);
504        assert_eq!(info.imports.len(), 1);
505        assert_eq!(info.imports[0].source, "./assets/app.js");
506    }
507
508    #[test]
509    fn root_absolute_script_src_unchanged() {
510        // `/src/main.ts` is a web convention (Vite root-relative) and must
511        // stay absolute so the resolver's HTML special case applies.
512        let info = parse_html_to_module(FileId(0), r#"<script src="/src/main.ts"></script>"#, 0);
513        assert_eq!(info.imports.len(), 1);
514        assert_eq!(info.imports[0].source, "/src/main.ts");
515    }
516
517    #[test]
518    fn parent_relative_script_src_unchanged() {
519        let info = parse_html_to_module(
520            FileId(0),
521            r#"<script src="../shared/vendor.js"></script>"#,
522            0,
523        );
524        assert_eq!(info.imports.len(), 1);
525        assert_eq!(info.imports[0].source, "../shared/vendor.js");
526    }
527
528    #[test]
529    fn skips_preload_link() {
530        let info = parse_html_to_module(
531            FileId(0),
532            r#"<link rel="preload" href="./src/font.woff2" as="font" />"#,
533            0,
534        );
535        assert!(info.imports.is_empty());
536    }
537
538    #[test]
539    fn skips_icon_link() {
540        let info =
541            parse_html_to_module(FileId(0), r#"<link rel="icon" href="./favicon.ico" />"#, 0);
542        assert!(info.imports.is_empty());
543    }
544
545    #[test]
546    fn skips_remote_stylesheet() {
547        let info = parse_html_to_module(
548            FileId(0),
549            r#"<link rel="stylesheet" href="https://fonts.googleapis.com/css" />"#,
550            0,
551        );
552        assert!(info.imports.is_empty());
553    }
554
555    // ── HTML comment stripping ───────────────────────────────────
556
557    #[test]
558    fn skips_commented_out_script() {
559        let info = parse_html_to_module(
560            FileId(0),
561            r#"<!-- <script src="./old.js"></script> -->
562            <script src="./new.js"></script>"#,
563            0,
564        );
565        assert_eq!(info.imports.len(), 1);
566        assert_eq!(info.imports[0].source, "./new.js");
567    }
568
569    #[test]
570    fn skips_commented_out_link() {
571        let info = parse_html_to_module(
572            FileId(0),
573            r#"<!-- <link rel="stylesheet" href="./old.css" /> -->
574            <link rel="stylesheet" href="./new.css" />"#,
575            0,
576        );
577        assert_eq!(info.imports.len(), 1);
578        assert_eq!(info.imports[0].source, "./new.css");
579    }
580
581    // ── Multi-line attributes ────────────────────────────────────
582
583    #[test]
584    fn handles_multiline_script_tag() {
585        let info = parse_html_to_module(
586            FileId(0),
587            "<script\n  type=\"module\"\n  src=\"./src/entry.js\"\n></script>",
588            0,
589        );
590        assert_eq!(info.imports.len(), 1);
591        assert_eq!(info.imports[0].source, "./src/entry.js");
592    }
593
594    #[test]
595    fn handles_multiline_link_tag() {
596        let info = parse_html_to_module(
597            FileId(0),
598            "<link\n  rel=\"stylesheet\"\n  href=\"./src/global.css\"\n/>",
599            0,
600        );
601        assert_eq!(info.imports.len(), 1);
602        assert_eq!(info.imports[0].source, "./src/global.css");
603    }
604
605    // ── Full HTML document ───────────────────────────────────────
606
607    #[test]
608    fn full_vite_html() {
609        let info = parse_html_to_module(
610            FileId(0),
611            r#"<!doctype html>
612<html>
613  <head>
614    <link rel="stylesheet" href="./src/global.css" />
615    <link rel="icon" href="/favicon.ico" />
616  </head>
617  <body>
618    <div id="app"></div>
619    <script type="module" src="./src/entry.js"></script>
620  </body>
621</html>"#,
622            0,
623        );
624        assert_eq!(info.imports.len(), 2);
625        let sources: Vec<&str> = info.imports.iter().map(|i| i.source.as_str()).collect();
626        assert!(sources.contains(&"./src/global.css"));
627        assert!(sources.contains(&"./src/entry.js"));
628    }
629
630    // ── Edge cases ───────────────────────────────────────────────
631
632    #[test]
633    fn empty_html() {
634        let info = parse_html_to_module(FileId(0), "", 0);
635        assert!(info.imports.is_empty());
636    }
637
638    #[test]
639    fn html_with_no_assets() {
640        let info = parse_html_to_module(
641            FileId(0),
642            r"<!doctype html><html><body><h1>Hello</h1></body></html>",
643            0,
644        );
645        assert!(info.imports.is_empty());
646    }
647
648    #[test]
649    fn single_quoted_attributes() {
650        let info = parse_html_to_module(FileId(0), r"<script src='./src/entry.js'></script>", 0);
651        assert_eq!(info.imports.len(), 1);
652        assert_eq!(info.imports[0].source, "./src/entry.js");
653    }
654
655    #[test]
656    fn all_imports_are_side_effect() {
657        let info = parse_html_to_module(
658            FileId(0),
659            r#"<script src="./entry.js"></script>
660            <link rel="stylesheet" href="./style.css" />"#,
661            0,
662        );
663        for imp in &info.imports {
664            assert!(matches!(imp.imported_name, ImportedName::SideEffect));
665            assert!(imp.local_name.is_empty());
666            assert!(!imp.is_type_only);
667        }
668    }
669
670    #[test]
671    fn suppression_comments_extracted() {
672        let info = parse_html_to_module(
673            FileId(0),
674            "<!-- fallow-ignore-file -->\n<script src=\"./entry.js\"></script>",
675            0,
676        );
677        // HTML comments use <!-- --> not //, so suppression parsing
678        // from source text won't find standard JS-style comments.
679        // This is expected; HTML suppression is not supported.
680        assert_eq!(info.imports.len(), 1);
681    }
682
683    // ── Angular template scanning ──────────────────────────────
684
685    #[test]
686    fn angular_template_extracts_member_refs() {
687        let info = parse_html_to_module(
688            FileId(0),
689            "<h1>{{ title() }}</h1>\n\
690             <p [class.highlighted]=\"isHighlighted\">{{ greeting() }}</p>\n\
691             <button (click)=\"onButtonClick()\">Toggle</button>",
692            0,
693        );
694        let names: rustc_hash::FxHashSet<&str> = info
695            .member_accesses
696            .iter()
697            .filter(|a| a.object == ANGULAR_TPL_SENTINEL)
698            .map(|a| a.member.as_str())
699            .collect();
700        assert!(names.contains("title"), "should contain 'title'");
701        assert!(
702            names.contains("isHighlighted"),
703            "should contain 'isHighlighted'"
704        );
705        assert!(names.contains("greeting"), "should contain 'greeting'");
706        assert!(
707            names.contains("onButtonClick"),
708            "should contain 'onButtonClick'"
709        );
710    }
711
712    #[test]
713    fn plain_html_no_angular_refs() {
714        let info = parse_html_to_module(
715            FileId(0),
716            "<!doctype html><html><body><h1>Hello</h1></body></html>",
717            0,
718        );
719        assert!(info.member_accesses.is_empty());
720    }
721}
fallow_extract/html.rs

fallow_extract/
html.rs
