Adjust tests

Author: bep

.github/workflows/test.yml

@@ -39,7 +39,7 @@ jobs:
       - name: Lint
         run: golint ./...
       - name: Test
-        run: go test -race ./... -coverpkg=./... -coverprofile=coverage.txt -covermode=atomic
+        run: go test -race ./libwebp -coverprofile=coverage.txt -covermode=atomic
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v4.5.0
         with:

libwebp/encode_test.go

@@ -6,6 +6,7 @@ import (
 	"image"
 	"image/draw"
 	"image/jpeg"
+	_ "image/png"
 	"io"
 	"os"
 	"path/filepath"