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https://github.com/gotenberg/gotenberg.git
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107 lines
3.0 KiB
Go
107 lines
3.0 KiB
Go
package scenario
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import (
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"fmt"
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"strings"
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"testing"
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)
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func TestCheckImageXObjectReuse(t *testing.T) {
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t.Parallel()
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const header = `page num type width height color comp bpc enc interp object ID x-ppi y-ppi size ratio
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--------------------------------------------------------------------------------------------
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`
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imageRow := func(page, object, generation int) string {
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return fmt.Sprintf("%d %d image 32 32 rgb 3 8 image no %d %d 96 96 3104B 101%%\n", page, page-1, object, generation)
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}
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tests := []struct {
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name string
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output string
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pages int
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wantErr string
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}{
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{
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name: "one page baseline",
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output: header + imageRow(1, 7, 0),
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pages: 1,
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},
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{
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name: "three pages share one image object",
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output: header + imageRow(1, 7, 0) + imageRow(2, 7, 0) + imageRow(3, 7, 0),
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pages: 3,
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},
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{
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name: "regression embeds a different object per page",
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output: header + imageRow(1, 7, 0) + imageRow(2, 8, 0) + imageRow(3, 9, 0),
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pages: 3,
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wantErr: "expected 1 unique image XObject(s) shared across 3 page(s), but actual is 3",
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},
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{
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name: "object generation is part of its identity",
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output: header + imageRow(1, 7, 0) + imageRow(2, 7, 1) + imageRow(3, 7, 0),
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pages: 3,
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wantErr: "expected 1 unique image XObject(s) shared across 3 page(s), but actual is 2",
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},
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{
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name: "image missing from a page",
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output: header + imageRow(1, 7, 0) + imageRow(3, 7, 0),
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pages: 3,
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wantErr: "expected 1 image appearance(s) on page 2, but actual is 0",
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},
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{
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name: "no image cannot pass",
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output: header,
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pages: 1,
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wantErr: "expected 1 image appearance(s) on page 1, but actual is 0",
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},
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{
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name: "repeated image only on first page cannot pass",
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output: header + imageRow(1, 7, 0) + imageRow(1, 7, 0) + imageRow(1, 7, 0),
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pages: 3,
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wantErr: "expected 1 image appearance(s) on page 1, but actual is 3",
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},
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{
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name: "image on unexpected page",
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output: header + imageRow(1, 7, 0) + imageRow(2, 7, 0),
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pages: 1,
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wantErr: "image on page 2 outside expected range 1-1",
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},
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{
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name: "tool error cannot pass",
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output: "Syntax Error: Couldn't find trailer dictionary",
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pages: 1,
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wantErr: "invalid pdfimages -list output:",
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},
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{
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name: "malformed image row",
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output: header + "1 0 image\n",
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pages: 1,
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wantErr: "invalid pdfimages -list row:",
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},
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{
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name: "inline image has no reusable object ID",
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output: header + "1 0 image 32 32 rgb 3 8 image no [inline] - 96 96 3104B 101%\n",
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pages: 1,
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wantErr: "parse image object ID",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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t.Parallel()
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err := checkImageXObjectReuse(tt.output, 1, tt.pages)
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if tt.wantErr == "" {
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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return
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}
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if err == nil || !strings.Contains(err.Error(), tt.wantErr) {
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t.Fatalf("expected error containing %q, got %v", tt.wantErr, err)
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}
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})
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}
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}
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