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

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

internal/cache/resolver_test.go

@@ -0,0 +1,92 @@
+package cache
+
+import (
+	"encoding/json"
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/require"
+)
+
+func Test_Resolver(t *testing.T) {
+	original := GetManager()
+	defer SetManager(original)
+	SetManager(NewInMemory(time.Hour))
+
+	type sub struct {
+		Name  string
+		Value bool
+	}
+
+	type thing struct {
+		Value  string
+		Values []int
+		Subs   []*sub
+	}
+
+	versionHash := hashType[thing]()
+	cache := GetManager().GetCache("test", "v7/"+versionHash)
+
+	resolver := GetResolver[thing]("test", "v7")
+	require.NotNil(t, resolver)
+
+	require.IsType(t, &cacheResolver[thing]{}, resolver)
+	cr := resolver.(*cacheResolver[thing])
+
+	require.IsType(t, cache, cr.cache)
+
+	resolveErrCount := 0
+	resolveThingErr := func() (thing, error) {
+		resolveErrCount++
+		return thing{}, fmt.Errorf("an error")
+	}
+
+	_, err := resolver.Resolve("err", resolveThingErr)
+	require.ErrorContains(t, err, "an error")
+	require.Equal(t, 1, resolveErrCount)
+
+	_, err = resolver.Resolve("err", resolveThingErr)
+	require.ErrorContains(t, err, "an error")
+	require.Equal(t, 2, resolveErrCount)
+
+	aThing := thing{
+		Value:  "a value",
+		Values: []int{7, 8, 9},
+		Subs: []*sub{
+			{
+				Name:  "sub1",
+				Value: true,
+			},
+			{
+				Name:  "sub2",
+				Value: false,
+			},
+		},
+	}
+
+	resolveThingCount := 0
+	resolveThing := func() (thing, error) {
+		resolveThingCount++
+		return aThing, nil
+	}
+
+	val, err := resolver.Resolve("thing", resolveThing)
+	require.NoError(t, err)
+	require.Equal(t, 1, resolveThingCount)
+	require.Equal(t, aThing, val)
+
+	val, err = resolver.Resolve("thing", resolveThing)
+	require.NoError(t, err)
+	require.Equal(t, 1, resolveThingCount)
+	require.Equal(t, aThing, val)
+
+	rdr, err := cache.Read("thing" + resolverKeySuffix)
+	require.NoError(t, err)
+	decoder := json.NewDecoder(rdr)
+
+	var val2 thing
+	err = decoder.Decode(&val2)
+	require.NoError(t, err)
+	require.Equal(t, aThing, val2)
+}