Add some tests verifying request map ordering

diff --git a/requesting_test.go b/requesting_test.go
new file mode 100644 (file)
index 0000000..8599086
--- /dev/null
+++ b/requesting_test.go
@@ -0,0 +1,43 @@
+package torrent
+
+import (
+       "testing"
+
+       pp "github.com/anacrolix/torrent/peer_protocol"
+       qt "github.com/frankban/quicktest"
+)
+
+func keysAsSlice(m map[Request]struct{}) (sl []Request) {
+       for k := range m {
+               sl = append(sl, k)
+       }
+       return
+}
+
+func makeTypicalRequests() map[Request]struct{} {
+       m := make(map[Request]struct{})
+       for p := pp.Integer(0); p < 4; p++ {
+               for c := pp.Integer(0); c < 16; c++ {
+                       m[Request{p, ChunkSpec{c * defaultChunkSize, defaultChunkSize}}] = struct{}{}
+               }
+       }
+       return m
+}
+
+func TestLogExampleRequestMapOrdering(t *testing.T) {
+       for k := range makeTypicalRequests() {
+               t.Log(k)
+       }
+
+}
+
+func TestRequestMapOrderingPersistent(t *testing.T) {
+       m := makeTypicalRequests()
+       // Shows that map order is persistent across separate range statements.
+       qt.Assert(t, keysAsSlice(m), qt.ContentEquals, keysAsSlice(m))
+}
+
+func TestRequestMapOrderAcrossInstances(t *testing.T) {
+       // This shows that different map instances with the same contents can have the same range order.
+       qt.Assert(t, keysAsSlice(makeTypicalRequests()), qt.ContentEquals, keysAsSlice(makeTypicalRequests()))
+}