fix: separate golang license caches from mod dir (#2852)

Signed-off-by: Keith Zantow <kzantow@gmail.com>

internal/cache/error_resolver_test.go

@@ -0,0 +1,47 @@
+package cache
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test_errorResolver(t *testing.T) {
+	original := GetManager()
+	defer SetManager(original)
+	SetManager(NewInMemory(time.Hour))
+
+	resolver := GetResolverCachingErrors[string]("theCache", "theVersion")
+
+	resolveCount := 0
+	resolveFunc := func() (string, error) {
+		resolveCount++
+		return "theValue", nil
+	}
+
+	val, err := resolver.Resolve("theKey", resolveFunc)
+	require.NoError(t, err)
+	require.Equal(t, 1, resolveCount)
+	require.Equal(t, "theValue", val)
+
+	val, err = resolver.Resolve("theKey", resolveFunc)
+	require.NoError(t, err)
+	require.Equal(t, 1, resolveCount)
+	require.Equal(t, "theValue", val)
+
+	errorCount := 0
+	errorFunc := func() (string, error) {
+		errorCount++
+		return "", fmt.Errorf("an error")
+	}
+
+	_, err = resolver.Resolve("errorValue", errorFunc)
+	require.ErrorContains(t, err, "an error")
+	require.Equal(t, 1, errorCount)
+
+	_, err = resolver.Resolve("errorValue", errorFunc)
+	require.ErrorContains(t, err, "an error")
+	require.Equal(t, 1, errorCount)
+}