Grcov report - primitive

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//! Tests for geometries of SVG primitives

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//!

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//! These use the *.svg and *.svg.geom files in the tests/fixtures/primitive_geometries directory.

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//!

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//! Each .svg.geom is a JSON file formatted like this:

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//!

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//! ```json

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//! {

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//!     "#element_id": {

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//!         "ink_rect": {

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//!             "x": 5.0,

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//!             "y": 15.0,

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//!             "width": 40.0,

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//!             "height": 50.0

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//!         },

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//!         "logical_rect": {

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//!             "x": 10.0,

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//!             "y": 20.0,

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//!             "width": 30.0,

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//!             "height": 40.0

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//!         }

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//!     }

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//! }

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//! ```

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//!

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//! Any number of element_ids may appear in the file.  For each of those, the `test()` function will

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//! call `CairoRenderer::get_layer_geometry()` and compare its result against the provided rectangles.

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use anyhow::{Context, Result};

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use rsvg::tests_only::Rect;

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use rsvg::{CairoRenderer, LengthUnit, Loader};

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use serde::Deserialize;

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use std::collections::BTreeMap;

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use std::fs;

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// Copy of cairo::Rectangle

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//

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// Somehow I can't make serde's "remote" work here, in combination with the BTreeMap below...

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#[derive(Copy, Clone, Deserialize, Debug, PartialEq)]

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struct Rectangle {

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    x: f64,

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    y: f64,

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    width: f64,

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    height: f64,

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impl From<Rectangle> for Rect {

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    fn from(r: Rectangle) -> Rect {

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        Rect {

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            x0: r.x,

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            y0: r.y,

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            x1: r.x + r.width,

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            y1: r.y + r.height,

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#[derive(Copy, Clone, Deserialize, Debug, PartialEq)]

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struct ElementGeometry {

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    ink_rect: Option<Rectangle>,

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    logical_rect: Option<Rectangle>,

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#[derive(Deserialize)]

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struct Geometries(BTreeMap<String, ElementGeometry>);

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fn read_geometries(path: &str) -> Result<Geometries> {

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    let contents = fs::read_to_string(path).context(format!("could not read {:?}", path))?;

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    serde_json::from_str(&contents).context(format!("could not parse JSON from {:?}", path))

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// We create a struct with the id and geometry so that

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// assert_eq!() in the tests will print out the element name for failures.

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//

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// Here we use rsvg::Rect as that one has an approx_eq() method.

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#[derive(Debug, PartialEq)]

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struct Element {

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    id: String,

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    ink_rect: Option<Rect>,

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    logical_rect: Option<Rect>,

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impl Element {

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    fn from_element_geometry(id: &str, geom: &ElementGeometry) -> Element {

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        Element {

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            id: String::from(id),

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            ink_rect: geom.ink_rect.map(Into::into),

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            logical_rect: geom.logical_rect.map(Into::into),

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    fn from_rectangles(

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        id: &str,

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        ink_rect: cairo::Rectangle,

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        logical_rect: cairo::Rectangle,

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    ) -> Element {

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        Element {

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            id: String::from(id),

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            ink_rect: Some(ink_rect.into()),

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            logical_rect: Some(logical_rect.into()),

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fn test(svg_filename: &str, geometries_filename: &str) {

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    let geometries = read_geometries(geometries_filename).expect("reading geometries JSON");

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    let handle = Loader::new()

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        .read_path(svg_filename)

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        .expect("reading geometries SVG");

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    let renderer = CairoRenderer::new(&handle);

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    let dimensions = renderer.intrinsic_dimensions();

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    let (svg_width, svg_height) = renderer

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        .intrinsic_size_in_pixels()

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        .expect("intrinsic size in pixels");

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    assert!(matches!(dimensions.width.unit, LengthUnit::Px));

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    assert!(matches!(dimensions.height.unit, LengthUnit::Px));

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    assert_eq!(dimensions.width.length, svg_width);

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    assert_eq!(dimensions.height.length, svg_height);

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    for (id, expected) in geometries.0.iter() {

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        let expected = Element::from_element_geometry(id, expected);

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        let viewport = cairo::Rectangle::new(0.0, 0.0, svg_width, svg_height);

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        let (ink_rect, logical_rect) = renderer

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            .geometry_for_layer(Some(id), &viewport)

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            .unwrap_or_else(|_| panic!("getting geometry for {}", id));

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        let computed = Element::from_rectangles(id, ink_rect, logical_rect);

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        assert_eq!(expected, computed);

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#[test]

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fn rect() {

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    test(

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        "tests/fixtures/primitive_geometries/rect.svg",

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        "tests/fixtures/primitive_geometries/rect.svg.geom",

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);

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#[test]

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fn rect_stroke() {

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    test(

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        "tests/fixtures/primitive_geometries/rect_stroke.svg",

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        "tests/fixtures/primitive_geometries/rect_stroke.svg.geom",

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);

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#[test]

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fn rect_stroke_unfilled() {

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    test(

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        "tests/fixtures/primitive_geometries/rect_stroke_unfilled.svg",

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        "tests/fixtures/primitive_geometries/rect_stroke_unfilled.svg.geom",

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);

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#[test]

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fn rect_isolate() {

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    test(

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        "tests/fixtures/primitive_geometries/rect_isolate.svg",

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        "tests/fixtures/primitive_geometries/rect_isolate.svg.geom",

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);

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