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fakeable_test.go
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fakeable_test.go
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package gofakeit
import (
"fmt"
"math"
"reflect"
"testing"
)
type strTyp string
func (t strTyp) Fake(faker *Faker) interface{} {
return faker.FirstName()
}
type strTypPtr string
func (t *strTypPtr) Fake(faker *Faker) interface{} {
return strTypPtr("hello test ptr")
}
type testStruct1 struct {
B string `fake:"{firstname}"`
}
type testStruct2 struct {
B strTyp
}
func TestIsFakeable(t *testing.T) {
var t1 testStruct2
var t2 *testStruct2
var t3 strTyp
var t4 *strTyp
var t5 strTypPtr
var t6 *strTypPtr
if isFakeable(reflect.ValueOf(t1).Type()) {
t.Errorf("expected testStruct2 not to be fakeable")
}
if isFakeable(reflect.ValueOf(t2).Type()) {
t.Errorf("expected *testStruct2 not to be fakeable")
}
if !isFakeable(reflect.ValueOf(t3).Type()) {
t.Errorf("expected strTyp to be fakeable")
}
if !isFakeable(reflect.ValueOf(t4).Type()) {
t.Errorf("expected *strTyp to be fakeable")
}
if !isFakeable(reflect.ValueOf(t5).Type()) {
t.Errorf("expected strTypPtr to be fakeable")
}
if !isFakeable(reflect.ValueOf(t6).Type()) {
t.Errorf("expected *strTypPtr to be fakeable")
}
}
func ExampleFakeable() {
var t1 testStruct1
var t2 testStruct1
var t3 testStruct2
var t4 testStruct2
New(314).Struct(&t1)
New(314).Struct(&t2)
New(314).Struct(&t3)
New(314).Struct(&t4)
fmt.Printf("%#v\n", t1)
fmt.Printf("%#v\n", t2)
fmt.Printf("%#v\n", t3)
fmt.Printf("%#v\n", t4)
// Expected Output:
// gofakeit.testStruct1{B:"Margarette"}
// gofakeit.testStruct1{B:"Margarette"}
// gofakeit.testStruct2{B:"Margarette"}
// gofakeit.testStruct2{B:"Margarette"}
}
type gammaFloat64 float64
func (gammaFloat64) Fake(faker *Faker) interface{} {
alpha := 2.0
// Generate a random value from the Gamma distribution
var r float64
for r == 0 {
u := faker.Float64Range(0, 1)
v := faker.Float64Range(0, 1)
w := u * (1 - u)
y := math.Sqrt(-2 * math.Log(w) / w)
x := alpha * (y*v + u - 0.5)
if x > 0 {
r = x
}
}
return gammaFloat64(r)
}
func ExampleGammaFloat64() {
f1 := New(100)
// Fakes random values from the Gamma distribution
var A1 gammaFloat64
var A2 gammaFloat64
var A3 gammaFloat64
f1.Struct(&A1)
f1.Struct(&A2)
f1.Struct(&A3)
fmt.Println(A1)
fmt.Println(A2)
fmt.Println(A3)
// Output:
// 10.300651760129734
// 5.391434877284098
// 2.0575989252140676
}
type poissonInt64 int64
func (poissonInt64) Fake(faker *Faker) interface{} {
lambda := 15.0
// Generate a random value from the Poisson distribution
var k int64
var p float64 = 1.0
var L float64 = math.Exp(-lambda)
for p > L {
u := faker.Float64Range(0, 1)
p *= u
k++
}
return poissonInt64(k - 1)
}
type customerSupportEmployee struct {
Name string `fake:"{firstname} {lastname}"`
CallCountPerHour poissonInt64
}
func ExamplecustomerSupportEmployee() {
f1 := New(100)
// Fakes random values from the Gamma distribution
var A1 customerSupportEmployee
var A2 customerSupportEmployee
var A3 customerSupportEmployee
f1.Struct(&A1)
f1.Struct(&A2)
f1.Struct(&A3)
fmt.Printf("%#v\n", A1)
fmt.Printf("%#v\n", A2)
fmt.Printf("%#v\n", A3)
// Output:
// gofakeit.customerSupportEmployee{Name:"Pearline Rippin", CallCountPerHour:12}
// gofakeit.customerSupportEmployee{Name:"Sammie Renner", CallCountPerHour:23}
// gofakeit.customerSupportEmployee{Name:"Katlyn Runte", CallCountPerHour:8}
}