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visual testing

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This commit is contained in:
Duhan BALCI
2026-04-06 03:17:30 +03:00
parent 889b66978a
commit f1357b6dbe
31 changed files with 2575 additions and 76 deletions
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108
layout-engine/tests/visual_test.rs
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@@ -13,7 +13,7 @@ mod visual {
use std::process::Command;
use dreport_core::models::Template;
use dreport_layout::{compute_layout, FontData};
use dreport_layout::{compute_layout, FontData, ResolvedContent};
use dreport_layout::pdf_render::render_pdf;
fn fixtures_dir() -> std::path::PathBuf {
@@ -156,17 +156,15 @@ mod visual {
}
}
#[test]
fn test_visual_snapshot_basic() {
let pdf_bytes =
generate_test_pdf("visual_test_template.json", "visual_test_data.json");
fn run_visual_test(template_file: &str, data_file: &str, test_name: &str) {
let pdf_bytes = generate_test_pdf(template_file, data_file);
assert!(!pdf_bytes.is_empty(), "PDF should not be empty");
let snap_dir = snapshots_dir();
fs::create_dir_all(&snap_dir).unwrap();
let actual_png = snap_dir.join("visual_test_actual.png");
let reference_png = snap_dir.join("visual_test_reference.png");
let actual_png = snap_dir.join(format!("{}_actual.png", test_name));
let reference_png = snap_dir.join(format!("{}_reference.png", test_name));
if !pdf_to_png(&pdf_bytes, &actual_png) {
eprintln!("Skipping visual comparison - pdftoppm not available");
@@ -188,7 +186,8 @@ mod visual {
match compare_images(&actual_png, &reference_png, 0.01) {
Ok(diff) => {
println!(
"Visual test passed: {:.4}% pixels differ",
"Visual test [{}] passed: {:.4}% pixels differ",
test_name,
diff * 100.0
);
let _ = fs::remove_file(&actual_png);
@@ -196,10 +195,99 @@ mod visual {
Err(err) => {
// Keep actual for debugging
panic!(
"Visual regression detected: {}. Actual saved at {:?}",
err, actual_png
"Visual regression [{}]: {}. Actual saved at {:?}",
test_name, err, actual_png
);
}
}
}
/// SVG'yi standalone HTML'e sar — chart'ın HTML render'ını görmek icin
fn generate_chart_svg_html(template_file: &str, data_file: &str, output_path: &Path) {
let template_json = fs::read_to_string(fixtures_dir().join(template_file)).unwrap();
let data_json = fs::read_to_string(fixtures_dir().join(data_file)).unwrap();
let template: Template = serde_json::from_str(&template_json).unwrap();
let data: serde_json::Value = serde_json::from_str(&data_json).unwrap();
let fonts = load_test_fonts();
let layout = compute_layout(&template, &data, &fonts);
let mut html = String::from("<!DOCTYPE html><html><head><style>body{margin:20px;font-family:sans-serif;background:#f5f5f5}.chart-box{margin:10px 0;background:white;box-shadow:0 1px 3px rgba(0,0,0,.1)}</style></head><body><h2>Chart SVG Preview (HTML render)</h2>");
for page in &layout.pages {
for el in &page.elements {
if let Some(ResolvedContent::Chart { svg, .. }) = &el.content {
html.push_str(&format!(
"<div class='chart-box' style='width:{}mm;height:{}mm'>{}</div>",
el.width_mm, el.height_mm, svg
));
}
}
}
html.push_str("</body></html>");
fs::write(output_path, html).unwrap();
}
/// Cross-renderer reference PNG output directory
fn cross_renderer_dir() -> std::path::PathBuf {
Path::new(env!("CARGO_MANIFEST_DIR"))
.parent()
.unwrap()
.join("frontend/tests/visual/cross-renderer-refs")
}
/// Generates PDF→PNG references for cross-renderer comparison with HTML render.
/// Run explicitly: cargo test -p dreport-layout --test visual_test -- generate_cross_renderer --ignored
#[test]
#[ignore]
fn generate_cross_renderer_refs() {
let fixtures = [
("visual_test_template.json", "visual_test_data.json", "visual_test"),
("chart_test_template.json", "chart_test_data.json", "chart_test"),
("comprehensive_test_template.json", "comprehensive_test_data.json", "comprehensive_test"),
];
let out_dir = cross_renderer_dir();
fs::create_dir_all(&out_dir).unwrap();
for (template_file, data_file, name) in &fixtures {
let pdf_bytes = generate_test_pdf(template_file, data_file);
assert!(!pdf_bytes.is_empty(), "PDF should not be empty for {}", name);
let png_path = out_dir.join(format!("{}.png", name));
if !pdf_to_png(&pdf_bytes, &png_path) {
panic!("pdftoppm failed for {} — install poppler-utils", name);
}
println!("Cross-renderer reference: {:?}", png_path);
}
}
#[test]
fn test_visual_snapshot_basic() {
run_visual_test("visual_test_template.json", "visual_test_data.json", "visual_test");
}
#[test]
fn test_visual_snapshot_charts() {
let pdf_bytes = generate_test_pdf("chart_test_template.json", "chart_test_data.json");
assert!(!pdf_bytes.is_empty(), "Chart PDF should not be empty");
let snap_dir = snapshots_dir();
fs::create_dir_all(&snap_dir).unwrap();
// PDF ciktisini kaydet (inceleme icin)
let pdf_path = snap_dir.join("chart_test.pdf");
fs::write(&pdf_path, &pdf_bytes).unwrap();
println!("Chart PDF saved to {:?}", pdf_path);
// SVG HTML ciktisini kaydet (karsilastirma icin)
let html_path = snap_dir.join("chart_test_svg.html");
generate_chart_svg_html("chart_test_template.json", "chart_test_data.json", &html_path);
println!("Chart SVG HTML saved to {:?}", html_path);
// Visual regression test
run_visual_test("chart_test_template.json", "chart_test_data.json", "chart_test");
}
}