func TestChainAppend(t *testing.T) {
var c Chain
c = New().Append(dummyMiddleware())
chk.AssertLogf(t, len(c) == 1, "Append to empty Chain gave len of %d not 1", len(c))
chk.AssertLog(t, c[0] != nil, "First middleware in chain exists")
c = New().Append(dummyMiddleware(), dummyMiddleware()).Append(dummyMiddleware())
chk.AssertLogf(t, len(c) == 3, "Append two times to empty Chain gave len of %d not 3", len(c))
}
// No test really needed, I run this code instead of writiing main
func TestNew(t *testing.T) {
var c Chain
c = New()
chk.AssertLog(t, len(c) == 0, "Empty chain is not if length zero")
c = New(dummyMiddleware())
chk.AssertLogf(t, len(c) == 1, "Chain with 1 mware was of length %d not 1", len(c))
}
func TestChainThen(t *testing.T) {
tracking = []string{}
// Create a new middleware chain with 3 tracked middlewares that will log before
// and after they execute, having in the middle a http handle
c := New(
dummyTrackedMiddleware("1"),
dummyTrackedMiddleware("2"),
dummyTrackedMiddleware("3"),
)
h := c.Then(dummyTrackedHttpHandler())
h.ServeHTTP(nil, nil)
chk.AssertLogf(t, tracking[0] == "before-1", "Expected 1st trace to be 'before-1' got '%s'", tracking[0])
chk.AssertLogf(t, tracking[1] == "before-2", "Expected 2nd trace to be 'before-2' got '%s'", tracking[1])
chk.AssertLogf(t, tracking[2] == "before-3", "Expected 3rd trace to be 'before-3' got '%s'", tracking[2])
chk.AssertLogf(t, tracking[3] == "handler", "Expected 4th trace to be 'handler' got '%s'", tracking[3])
chk.AssertLogf(t, tracking[4] == "after-3", "Expected 5th trace to be 'after-3' got '%s'", tracking[4])
chk.AssertLogf(t, tracking[5] == "after-2", "Expected 6th trace to be 'after-2' got '%s'", tracking[5])
chk.AssertLogf(t, tracking[6] == "after-1", "Expected 7th trace to be 'after-1' got '%s'", tracking[6])
}