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makers_test.go
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makers_test.go
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package go_promise
import (
"errors"
"testing"
"time"
)
func TestNew(t *testing.T) {
t.Run("it should resolve int", func(t *testing.T) {
value := New(func(resolveFunc ResolveFunc[int], rejectFunc RejectFunc) {
resolveFunc(10)
})
result, err := Await[int](value)
if err != nil {
t.Error("error is not expected")
}
if result != 10 {
t.Error("result is not 10")
}
})
t.Run("it should reject error", func(t *testing.T) {
expected := errors.New("error")
value := New(func(resolveFunc ResolveFunc[int], rejectFunc RejectFunc) {
rejectFunc(expected)
})
result, err := Await[int](value)
if err != expected {
t.Error("error is expected")
}
if result != 0 {
t.Error("result is not 10")
}
})
t.Run("it should return invalid type", func(t *testing.T) {
value := New(func(resolveFunc ResolveFunc[int], rejectFunc RejectFunc) {
resolveFunc(10)
})
result, err := Await[bool](value)
if err != InvalidTypeErr {
t.Error("error is not expected")
}
if result != false {
t.Error("result is not false")
}
})
}
func TestReject(t *testing.T) {
expected := errors.New("error")
value := Reject(expected)
result, err := Await[int](value)
if err != expected {
t.Error("error is expected")
}
if result != 0 {
t.Error("result is not 10")
}
}
func TestResolve(t *testing.T) {
value := Resolve(10)
result, err := Await[int](value)
if err != nil {
t.Error("error is not expected")
}
if result != 10 {
t.Error("result is not 10")
}
}
func TestFunction(t *testing.T) {
t.Run("it should resolve int", func(t *testing.T) {
value := Function(func() (int, error) {
return 10, nil
})
result, err := Await[int](value)
if err != nil {
t.Error("error is not expected")
}
if result != 10 {
t.Error("result is not 10")
}
})
t.Run("it should reject error", func(t *testing.T) {
expected := errors.New("error")
value := Function(func() (int, error) {
return 0, expected
})
result, err := Await[int](value)
if err != expected {
t.Error("error is expected")
}
if result != 0 {
t.Error("result is not 10")
}
})
t.Run("it should return invalid type", func(t *testing.T) {
value := Function(func() (int, error) {
return 10, nil
})
result, err := Await[bool](value)
if err != InvalidTypeErr {
t.Error("error is not expected")
}
if result != false {
t.Error("result is not false")
}
})
}
func TestWithTimeout(t *testing.T) {
t.Run("it should resolve int", func(t *testing.T) {
value := WithTimeout[int](Function(func() (int, error) {
return 10, nil
}), time.Minute)
result, err := Await[int](value)
if err != nil {
t.Error("error is not expected")
}
if result != 10 {
t.Error("result is not 10")
}
})
t.Run("it should reject error", func(t *testing.T) {
expected := errors.New("error")
value := WithTimeout[int](Function(func() (int, error) {
return 0, expected
}), time.Minute)
result, err := Await[int](value)
if err != expected {
t.Error("error is not as expected")
}
if result != 0 {
t.Error("result is not 10")
}
})
t.Run("it should reject with timeout", func(t *testing.T) {
value := WithTimeout[int](Function(func() (int, error) {
time.Sleep(time.Minute)
return 10, nil
}), 0)
result, err := Await[int](value)
if err != TimeoutErr {
t.Error("timeout is expected")
}
if result != 0 {
t.Error("result is not 0")
}
})
t.Run("it should reject with timeout again", func(t *testing.T) {
value := WithTimeout[int](Function(func() (int, error) {
time.Sleep(time.Minute)
return 10, nil
}), 0)
result, err := Await[bool](value)
if err != TimeoutErr {
t.Error("timeout is expected")
}
if result != false {
t.Error("result is not false")
}
})
t.Run("it should reject with timeout and again", func(t *testing.T) {
value := WithTimeout[int](Function(func() (int, error) {
time.Sleep(time.Minute)
return 10, nil
}), time.Second)
result, err := Await[bool](value)
if err != TimeoutErr {
t.Error("timeout is expected")
}
if result != false {
t.Error("result is not false")
}
})
}
func TestWithRetry(t *testing.T) {
t.Run("it should resolve int", func(t *testing.T) {
value := WithRetry[int](Function(func() (int, error) {
return 10, nil
}), 3)
result, err := Await[int](value)
if err != nil {
t.Error("error is not expected")
}
if result != 10 {
t.Error("result is not 10")
}
})
t.Run("it should reject error", func(t *testing.T) {
value := WithRetry[int](Function(func() (int, error) {
return 0, errors.New("error")
}), 3)
result, err := Await[int](value)
if err != MaxRetriesErr {
t.Error("error is expected")
}
if result != 0 {
t.Error("result is not 0")
}
})
t.Run("it should reject error", func(t *testing.T) {
temporary := errors.New("error")
tried := 0
value := WithRetry[int](Function(func() (int, error) {
if tried < 3 {
tried++
return 0, temporary
}
return 10, nil
}), 3)
result, err := Await[int](value)
if err != nil {
t.Error("error is not expected")
}
if result != 10 {
t.Error("result is not 10")
}
})
t.Run("it should reject error", func(t *testing.T) {
value := WithRetry[float64](Function(func() (int, error) {
return 10, nil
}), 3)
result, err := Await[float64](value)
if err != MaxRetriesErr {
t.Error("error is not as expected")
}
if result != 0 {
t.Error("result is not 0")
}
})
t.Run("it should reject error", func(t *testing.T) {
tried := 0
value := WithRetry[int](Function(func() (int, error) {
if tried < 4 {
tried++
return 0, errors.New("error")
}
return 10, nil
}), 3)
result, err := Await[int](value)
if err != MaxRetriesErr {
t.Error("error is expected")
}
if result != 0 {
t.Error("result is not 0")
}
})
}
func TestAsPreExecuted(t *testing.T) {
t.Run("it should reject with invalid type", func(t *testing.T) {
promise := AsPreExecuted[float64](Function(func() (int, error) {
return 10, nil
}))
result, err := Await[float64](promise)
if err != InvalidTypeErr {
t.Error("error is not as expected")
}
if result != 0 {
t.Error("result is not 0")
}
})
t.Run("it should not pre-execute", func(t *testing.T) {
channel := make(chan bool)
value := New(func(resolveFunc ResolveFunc[int], rejectFunc RejectFunc) {
go func() {
channel <- true
}()
resolveFunc(10)
})
var executed bool
select {
case <-channel:
executed = true
case <-time.After(time.Second):
executed = false
}
if executed {
t.Error("promise is executed")
}
result, err := Await[int](value)
if err != nil {
t.Error("error is not expected")
}
if result != 10 {
t.Error("result is not 10")
}
})
t.Run("it should pre-execute", func(t *testing.T) {
channel := make(chan bool)
value := AsPreExecuted[int](New(func(resolveFunc ResolveFunc[int], rejectFunc RejectFunc) {
go func() {
channel <- true
}()
resolveFunc(10)
}))
var executed bool
select {
case <-channel:
executed = true
case <-time.After(time.Second):
executed = false
}
if !executed {
t.Error("promise is not executed")
}
result, err := Await[int](value)
if err != nil {
t.Error("error is not expected")
}
if result != 10 {
t.Error("result is not 10")
}
})
}