Files
pixa/internal/imgcache/svg_internal_test.go
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clawbot efbf05a6fa
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Support SVG sources (closes #68)
The fetcher accepts image/svg+xml and internal/magic detects SVG. orig
of an SVG at the orig size is the SVG unchanged, cached as a variant; at
another size it is ErrSVGNotOriginalSize (400). Any other format renders
it with libvips' thumbnail at the least size covering the output, at
most 8192 on a side, so it stays sharp. An SVG's own size is not
limited; one with a side over 8192 times the other is ErrSVGTooThin
(415). The cache reads up to 1024 first bytes to find a file's format.
Tests that pinned the SVG refusal now expect SVG to be read. Render time
and memory are unbounded: P1 in TODO.md until the owner decides on
#68.

Model: opus-5-5
2026-11-11 13:21:12 +00:00

55 lines
1.5 KiB
Go

package imgcache
import (
"testing"
"sneak.berlin/go/pixa/internal/imagerequest"
)
// testSVG is an SVG with a comment before its root element, so that its
// first magic.MinMagicBytes bytes do not show its format.
const testSVG = `<!-- a drawing --><svg xmlns="http://www.w3.org/2000/svg" ` +
`width="4" height="4"/>`
// TestSourceAndVariant_ReadSVG checks that a cached SVG source is read as
// SVG, and a cached SVG variant (orig of an SVG source) as image/svg+xml.
func TestSourceAndVariant_ReadSVG(t *testing.T) {
t.Parallel()
cache, _ := newEvictionTestCache(t, 1<<30)
storeEvictionTestSource(t, cache, testHostCDN, "/drawing.svg", []byte(testSVG))
reader, _, format, err := cache.Source(t.Context(),
imagerequest.Source{Host: testHostCDN, Path: "/drawing.svg"})
t.Logf("Source() format = %q, error = %v", format, err)
if err != nil || format != imagerequest.FormatSVG {
t.Errorf("Source() = format %q, error %v; want %q", format, err,
imagerequest.FormatSVG)
}
if reader != nil {
_ = reader.Close()
}
key := imagerequest.VariantKey("aabbccdd3001")
err = cache.variants.Write(string(key), []byte(testSVG))
if err != nil {
t.Fatalf("storing the variant file: %v", err)
}
variant, err := cache.Variant(key)
t.Logf("Variant() content type = %q, error = %v", variant.ContentType, err)
if err != nil || variant.ContentType != "image/svg+xml" {
t.Errorf("Variant() = content type %q, error %v; want image/svg+xml",
variant.ContentType, err)
}
if variant.Content != nil {
_ = variant.Content.Close()
}
}