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tests: add more tests on interfaces

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Sandro Martini 2020-05-11 15:13:03 +02:00 committed by GitHub
parent ea8fcb3981
commit 538662d99a
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1 changed files with 23 additions and 9 deletions
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32
vlib/v/tests/interface_test.v
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@ -30,9 +30,9 @@ fn (c mut Cat) set_breed(new string) {
c.breed = new c.breed = new
} }
// utility function to convert to string, as a sample // utility function to override default convert to string, as a sample
fn (c Cat) str() string { fn (c Cat) str() string {
return 'Cat: $c.breed' return 'Custom string conversion for Cat: $c.breed'
} }
fn (d Dog) speak(s string) { fn (d Dog) speak(s string) {
@ -53,7 +53,8 @@ fn (d mut Dog) set_breed(new string) {
println('Nah') println('Nah')
} }
// do not add to Dog the utility function 'str', as a sample // do not add to Dog the utility function 'str', so the default one will be used, as a sample
fn test_todo() { fn test_todo() {
if true { if true {
} else { } else {
@ -65,10 +66,9 @@ fn perform_speak(a Animal) {
assert true assert true
name := a.name() name := a.name()
assert name == 'Dog' || name == 'Cat' assert name == 'Dog' || name == 'Cat'
// if a is Dog {
// assert name == 'Dog'
// }
println(a.name()) println(a.name())
println('Got animal of type: ${typeof(a)}') // TODO: get implementation type (if possible)
// assert a is Dog || a is Cat // TODO: enable when available
} }
fn perform_speak_on_ptr(a &Animal) { fn perform_speak_on_ptr(a &Animal) {
@ -130,22 +130,36 @@ fn test_perform_name_detailed() {
dog := Dog{ dog := Dog{
breed: 'Labrador Retriever' breed: 'Labrador Retriever'
} }
println('Test on Dog: $dog ...') println('Test on Dog: "$dog" ...') // using default conversion to string
perform_name_detailed(dog) perform_name_detailed(dog)
cat := Cat{} cat := Cat{}
println('Test on Cat: $cat ...') println('Test on empty Cat: "$cat" ...')
perform_speak(cat) perform_speak(cat)
println('Test on another Cat: ...') println('Test on a Persian Cat: ...')
perform_speak(Cat{ perform_speak(Cat{
breed: 'Persian' breed: 'Persian'
}) })
cat_persian2 := Cat{
breed: 'Persian'
}
println('Test on another Persian Cat: "$cat_persian2" ...')
perform_speak(cat_persian2)
cat_persian2_str := cat_persian2.str()
println("Persian Cat 2: '$cat_persian2_str' ...")
assert cat_persian2_str == "Custom string conversion for Cat: Persian"
println('Test (dummy/empty) on array of animals ...') println('Test (dummy/empty) on array of animals ...')
handle_animals([dog, cat]) handle_animals([dog, cat])
handle_animals_mutable([dog, cat])
assert true
} }
fn handle_animals(a []Animal) { fn handle_animals(a []Animal) {
} }
fn handle_animals_mutable(mut a []Animal) {
}
interface Register { interface Register {
register() register()
} }