Files
pixa/internal/imageprocessor/computed_side_internal_test.go
T
sneak dbb21e2f8d
check / check (push) Canceled after 0s
Test that a side computed for a size with one side 0 is at least 1
An 8192x1 source at 100x0 and 1300x0 and an 8192x2 source at 100x0, and
the same turned on their side, in every fit mode. The test fails until
the fix for #283 lands; TODO.md
records the bug at the top as P1 until then.

Model: opus-5-5
2026-10-16 00:38:00 +00:00

119 lines
3.9 KiB
Go

package imageprocessor
import (
"bytes"
"errors"
"testing"
)
// TestImageProcessor_RefusesComputedSideAboveMaximum verifies that a size
// with one side 0, which Process computes from the input's proportions, is
// served when that side comes out at MaxOutputDimension and refused with
// ErrOutputTooLarge when it would be above. A 4096x1 or 1x4096 input given
// 2 for its short side has 8192 for its long side.
func TestImageProcessor_RefusesComputedSideAboveMaximum(t *testing.T) {
t.Parallel()
tests := []struct {
name string
inputWidth, inputHeight int
size Size
wantErr error
}{
{"width at the maximum", 4096, 1, Size{Height: 2}, nil},
{"width above the maximum", 4096, 1, Size{Height: 3}, ErrOutputTooLarge},
{"height at the maximum", 1, 4096, Size{Width: 2}, nil},
{"height above the maximum", 1, 4096, Size{Width: 3}, ErrOutputTooLarge},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
t.Parallel()
input := createTestJPEG(t, tt.inputWidth, tt.inputHeight)
result, err := New(Params{}).Process(t.Context(),
bytes.NewReader(input),
&Request{Size: tt.size, Format: FormatJPEG, FitMode: FitCover})
if result != nil {
t.Logf("Process() made %dx%d", result.Width, result.Height)
if max(result.Width, result.Height) != MaxOutputDimension {
t.Errorf("Process() made %dx%d, want a side of %d",
result.Width, result.Height, MaxOutputDimension)
}
}
if !errors.Is(err, tt.wantErr) {
t.Errorf("Process() error = %v, want %v", err, tt.wantErr)
}
})
}
}
// TestImageProcessor_ComputedSideIsAtLeastOne verifies that, for a size with
// one side 0, the side computed from the input's proportions is 1 where it
// would round down to 0, and that Process makes that size in every fit mode
// but FitOutside, which scales the input to cover the size and so can make
// it longer. Each case checks the size targetDimensions gives before it
// calls Process: with that side at 0, an 8192x1 input at 1300x0 makes
// libvips ask for about 39 GB with FitCover.
func TestImageProcessor_ComputedSideIsAtLeastOne(t *testing.T) {
t.Parallel()
tests := []struct {
name string
inputWidth, inputHeight int
size Size
wantWidth, wantHeight int
}{
{"8192x1 at 100x0", 8192, 1, Size{Width: 100}, 100, 1},
{"8192x1 at 1300x0", 8192, 1, Size{Width: 1300}, 1300, 1},
{"8192x2 at 100x0", 8192, 2, Size{Width: 100}, 100, 1},
{"1x8192 at 0x100", 1, 8192, Size{Height: 100}, 1, 100},
{"1x8192 at 0x1300", 1, 8192, Size{Height: 1300}, 1, 1300},
{"2x8192 at 0x100", 2, 8192, Size{Height: 100}, 1, 100},
}
fits := []FitMode{FitCover, FitContain, FitFill, FitInside, FitOutside}
for _, tt := range tests {
for _, fit := range fits {
t.Run(tt.name+" "+string(fit), func(t *testing.T) {
t.Parallel()
width, height, err := targetDimensions(tt.size,
tt.inputWidth, tt.inputHeight)
if err != nil || width != tt.wantWidth || height != tt.wantHeight {
t.Fatalf("targetDimensions() = %dx%d, %v, want %dx%d",
width, height, err, tt.wantWidth, tt.wantHeight)
}
input := createTestJPEG(t, tt.inputWidth, tt.inputHeight)
result, err := New(Params{}).Process(t.Context(),
bytes.NewReader(input),
&Request{Size: tt.size, Format: FormatJPEG, FitMode: fit})
if err != nil {
t.Fatalf("Process() error = %v", err)
}
defer func() { _ = result.Content.Close() }()
t.Logf("Process() made %dx%d", result.Width, result.Height)
ok := result.Width == tt.wantWidth && result.Height == tt.wantHeight
if fit == FitOutside {
ok = result.Width >= tt.wantWidth && result.Height >= tt.wantHeight
}
if !ok {
t.Errorf("Process() made %dx%d, want %dx%d (at least, for %s)",
result.Width, result.Height, tt.wantWidth, tt.wantHeight,
FitOutside)
}
})
}
}
}