Check cached sources with upstream after the cache TTL (closes #69) (#350)

internal/imgcache/source_content_internal_test.go

@@ -128,7 +128,7 @@ func TestPutSource_FailedRowWriteLeavesNoFile(t *testing.T) {
 		Source: imagerequest.Source{Host: testHostCDN, Path: testPathCat},
 	}
 	key, err := cache.PutSource(t.Context(), req.Source,
-		bytes.NewReader([]byte("source bytes")))
+		bytes.NewReader([]byte("source bytes")), SourceInfo{})
 	t.Logf("PutSource() = %q, error = %v", key, err)
 
 	if err == nil {
@@ -170,7 +170,7 @@ func TestSource_FormatFromFirstBytes(t *testing.T) {
 			t.Fatalf("reading the %s image: %v", format, err)
 		}
 
-		_, err = cache.PutSource(t.Context(), src, bytes.NewReader(image))
+		_, err = cache.PutSource(t.Context(), src, bytes.NewReader(image), SourceInfo{})
 		if err != nil {
 			t.Fatalf("PutSource(%s) error = %v", format, err)
 		}