func Test_Run_creates_channel(t *testing.T) {
var out chan Person
junction.New(&out, nil)
if out == nil {
t.Error("Channel is nil")
}
}
func Test_update_via_member_func_yields_updated_value(t *testing.T) {
s := make(chan string)
var out chan Person
junction.New(&out, []junction.Source{{
Input: s,
Update: (*Person).SetName,
Model: &Person{Name: "Jeff", Age: 56},
}})
s <- "Fishy Bob"
person := <-out
fb := Person{Age: 56, Name: "Fishy Bob"}
if person != fb {
t.Errorf("Where's Fishy Bob?")
}
}
func Test_update_via_non_member_func_yields_updated_value(t *testing.T) {
i := make(chan int)
var out chan Person
junction.New(&out, []junction.Source{{
Input: i,
Update: UpdatePersonAge,
Model: &Person{Name: "Jeff", Age: 56},
}})
i <- 57
person := <-out
older := Person{Age: 57, Name: "Jeff"}
if person != older {
t.Errorf("Expected %v but got %v", older, person)
}
}
func Test_Model_lookup_function(t *testing.T) {
people := People{
123: &Person{Name: "Ann", Age: 23},
456: &Person{Name: "Bob", Age: 21},
}
names := make(chan NameUpdate)
ages := make(chan AgeUpdate)
var out chan Person
junction.New(&out, []junction.Source{
{
Input: names,
Update: ApplyNameUpdate,
Model: people.ById,
},
{
Input: ages,
Update: ApplyAgeUpdate,
Model: people.ById,
},
})
names <- NameUpdate{
id: 123,
name: "Anne",
}
anne := <-out
if anne != (Person{Name: "Anne", Age: 23}) {
t.Error("Name update failed")
}
ages <- AgeUpdate{id: 123}
anne = <-out
if anne.Age != 24 {
t.Error("Age update failed")
}
if anne.Name != "Anne" {
t.Error("Name update was lost")
}
ages <- AgeUpdate{id: 456}
bob := <-out
if bob != (Person{Name: "Bob", Age: 22}) {
t.Error("Age update failed")
}
// check state
if *people[123] != (Person{Name: "Anne", Age: 24}) {
t.Errorf("Wrong value for Anne: %v", people[123])
}
if *people[456] != (Person{Name: "Bob", Age: 22}) {
t.Errorf("Wrong value for Bob: %v", people[456])
}
}