Make some sketchy tests Go 1.2 only

In particular, these started failing when running tests under the race
detector in Go 1.4 [0], probably due to some kind of (GC?) hijinks
clearing out the sync.Pool.

[0]: these tests might have also failed in 1.3, but I didn't check

web/middleware12_test.go

@@ -0,0 +1,52 @@
+// +build !go1.3
+
+package web
+
+import "testing"
+
+// These tests were pretty sketchtacular to start with, but they aren't even
+// guaranteed to pass with Go 1.3's sync.Pool. Let's keep them here for now; if
+// they start spuriously failing later we can delete them outright.
+
+func TestCaching(t *testing.T) {
+	ch := make(chan string)
+	st := makeStack(ch)
+	cs1 := st.alloc()
+	cs2 := st.alloc()
+	if cs1 == cs2 {
+		t.Fatal("cs1 and cs2 are the same")
+	}
+	st.release(cs2)
+	cs3 := st.alloc()
+	if cs2 != cs3 {
+		t.Fatalf("Expected cs2 to equal cs3")
+	}
+	st.release(cs1)
+	st.release(cs3)
+	cs4 := st.alloc()
+	cs5 := st.alloc()
+	if cs4 != cs1 {
+		t.Fatal("Expected cs4 to equal cs1")
+	}
+	if cs5 != cs3 {
+		t.Fatal("Expected cs5 to equal cs3")
+	}
+}
+
+func TestInvalidation(t *testing.T) {
+	ch := make(chan string)
+	st := makeStack(ch)
+	cs1 := st.alloc()
+	cs2 := st.alloc()
+	st.release(cs1)
+	st.invalidate()
+	cs3 := st.alloc()
+	if cs3 == cs1 {
+		t.Fatal("Expected cs3 to be fresh, instead got cs1")
+	}
+	st.release(cs2)
+	cs4 := st.alloc()
+	if cs4 == cs2 {
+		t.Fatal("Expected cs4 to be fresh, instead got cs2")
+	}
+}

web/middleware_test.go

@@ -163,50 +163,6 @@ func TestAbandon(t *testing.T) {
 	assertOrder(t, ch, "one", "router", "end")
 }
 
-// This is a pretty sketchtacular test
-func TestCaching(t *testing.T) {
-	ch := make(chan string)
-	st := makeStack(ch)
-	cs1 := st.alloc()
-	cs2 := st.alloc()
-	if cs1 == cs2 {
-		t.Fatal("cs1 and cs2 are the same")
-	}
-	st.release(cs2)
-	cs3 := st.alloc()
-	if cs2 != cs3 {
-		t.Fatalf("Expected cs2 to equal cs3")
-	}
-	st.release(cs1)
-	st.release(cs3)
-	cs4 := st.alloc()
-	cs5 := st.alloc()
-	if cs4 != cs1 {
-		t.Fatal("Expected cs4 to equal cs1")
-	}
-	if cs5 != cs3 {
-		t.Fatal("Expected cs5 to equal cs3")
-	}
-}
-
-func TestInvalidation(t *testing.T) {
-	ch := make(chan string)
-	st := makeStack(ch)
-	cs1 := st.alloc()
-	cs2 := st.alloc()
-	st.release(cs1)
-	st.invalidate()
-	cs3 := st.alloc()
-	if cs3 == cs1 {
-		t.Fatal("Expected cs3 to be fresh, instead got cs1")
-	}
-	st.release(cs2)
-	cs4 := st.alloc()
-	if cs4 == cs2 {
-		t.Fatal("Expected cs4 to be fresh, instead got cs2")
-	}
-}
-
 func TestContext(t *testing.T) {
 	router := func(c *C, w http.ResponseWriter, r *http.Request) {
 		if c.Env["reqID"].(int) != 2 {