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dump_test.go
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/*
* Copyright (c) 2013 Dave Collins <[email protected]>
* Copyright (c) 2015 Dan Kortschak <[email protected]>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
Test Summary:
NOTE: For each test, a nil pointer, a single pointer and double pointer to the
base test element are also tested to ensure proper indirection across all types.
- Max int8, int16, int32, int64, int
- Max uint8, uint16, uint32, uint64, uint
- Boolean true and false
- Standard complex64 and complex128
- Array containing standard ints
- Array containing type with custom formatter on pointer receiver only
- Array containing interfaces
- Array containing bytes
- Slice containing standard float32 values
- Slice containing type with custom formatter on pointer receiver only
- Slice containing interfaces
- Slice containing bytes
- Nil slice
- Standard string
- Nil interface
- Sub-interface
- Map with string keys and int vals
- Map with custom formatter type on pointer receiver only keys and vals
- Map with interface keys and values
- Map with nil interface value
- Struct with primitives
- Struct that contains another struct
- Struct that contains custom type with Stringer pointer interface via both
exported and unexported fields
- Struct that contains embedded struct and field to same struct
- Uintptr to 0 (null pointer)
- Uintptr address of real variable
- Unsafe.Pointer to 0 (null pointer)
- Unsafe.Pointer to address of real variable
- Nil channel
- Standard int channel
- Function with no params and no returns
- Function with param and no returns
- Function with multiple params and multiple returns
- Struct that is circular through self referencing
- Structs that are circular through cross referencing
- Structs that are indirectly circular
- Type that panics in its Stringer interface
*/
package utter_test
import (
"bytes"
"fmt"
"math"
"testing"
"unsafe"
"github.com/kortschak/utter"
)
// dumpTest is used to describe a test to be perfomed against the Dump method.
type dumpTest struct {
in interface{}
wants []string
}
// dumpTests houses all of the tests to be performed against the Dump method.
var dumpTests = make([]dumpTest, 0)
// addDumpTest is a helper method to append the passed input and desired result
// to dumpTests
func addDumpTest(in interface{}, wants ...string) {
test := dumpTest{in, wants}
dumpTests = append(dumpTests, test)
}
func addIntDumpTests() {
// Max int8.
v := int8(127)
nv := (*int8)(nil)
pv := &v
vt := "int8"
vs := "127"
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
// Max int16.
v2 := int16(32767)
nv2 := (*int16)(nil)
pv2 := &v2
v2t := "int16"
v2s := "32767"
addDumpTest(v2, v2t+"("+v2s+")\n")
addDumpTest(pv2, "&"+v2t+"("+v2s+")\n")
addDumpTest(&pv2, "&&"+v2t+"("+v2s+")\n")
addDumpTest(nv2, "(*"+v2t+")(nil)\n")
// Max int32.
v3 := int32(2147483647)
nv3 := (*int32)(nil)
pv3 := &v3
v3t := "int32"
v3s := "2147483647"
addDumpTest(v3, v3t+"("+v3s+")\n")
addDumpTest(pv3, "&"+v3t+"("+v3s+")\n")
addDumpTest(&pv3, "&&"+v3t+"("+v3s+")\n")
addDumpTest(nv3, "(*"+v3t+")(nil)\n")
// Max int64.
v4 := int64(9223372036854775807)
nv4 := (*int64)(nil)
pv4 := &v4
v4t := "int64"
v4s := "9223372036854775807"
addDumpTest(v4, v4t+"("+v4s+")\n")
addDumpTest(pv4, "&"+v4t+"("+v4s+")\n")
addDumpTest(&pv4, "&&"+v4t+"("+v4s+")\n")
addDumpTest(nv4, "(*"+v4t+")(nil)\n")
// Max int.
v5 := int(2147483647)
nv5 := (*int)(nil)
pv5 := &v5
v5t := "int"
v5s := "2147483647"
addDumpTest(v5, v5t+"("+v5s+")\n")
addDumpTest(pv5, "&"+v5t+"("+v5s+")\n")
addDumpTest(&pv5, "&&"+v5t+"("+v5s+")\n")
addDumpTest(nv5, "(*"+v5t+")(nil)\n")
}
func addUintDumpTests() {
// Max uint8.
v := uint8(255)
nv := (*uint8)(nil)
pv := &v
vt := "uint8"
vs := "0xff"
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
// Max uint16.
v2 := uint16(65535)
nv2 := (*uint16)(nil)
pv2 := &v2
v2t := "uint16"
v2s := "0xffff"
addDumpTest(v2, v2t+"("+v2s+")\n")
addDumpTest(pv2, "&"+v2t+"("+v2s+")\n")
addDumpTest(&pv2, "&&"+v2t+"("+v2s+")\n")
addDumpTest(nv2, "(*"+v2t+")(nil)\n")
// Max uint32.
v3 := uint32(4294967295)
nv3 := (*uint32)(nil)
pv3 := &v3
v3t := "uint32"
v3s := "0xffffffff"
addDumpTest(v3, v3t+"("+v3s+")\n")
addDumpTest(pv3, "&"+v3t+"("+v3s+")\n")
addDumpTest(&pv3, "&&"+v3t+"("+v3s+")\n")
addDumpTest(nv3, "(*"+v3t+")(nil)\n")
// Max uint64.
v4 := uint64(18446744073709551615)
nv4 := (*uint64)(nil)
pv4 := &v4
v4t := "uint64"
v4s := "0xffffffffffffffff"
addDumpTest(v4, v4t+"("+v4s+")\n")
addDumpTest(pv4, "&"+v4t+"("+v4s+")\n")
addDumpTest(&pv4, "&&"+v4t+"("+v4s+")\n")
addDumpTest(nv4, "(*"+v4t+")(nil)\n")
// Max uint.
v5 := uint(4294967295)
nv5 := (*uint)(nil)
pv5 := &v5
v5t := "uint"
v5s := "0xffffffff"
addDumpTest(v5, v5t+"("+v5s+")\n")
addDumpTest(pv5, "&"+v5t+"("+v5s+")\n")
addDumpTest(&pv5, "&&"+v5t+"("+v5s+")\n")
addDumpTest(nv5, "(*"+v5t+")(nil)\n")
}
func addBoolDumpTests() {
// Boolean true.
v := bool(true)
nv := (*bool)(nil)
pv := &v
vt := "bool"
vs := "true"
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
// Boolean false.
v2 := bool(false)
pv2 := &v2
v2t := "bool"
v2s := "false"
addDumpTest(v2, v2t+"("+v2s+")\n")
addDumpTest(pv2, "&"+v2t+"("+v2s+")\n")
addDumpTest(&pv2, "&&"+v2t+"("+v2s+")\n")
}
func addFloatDumpTests() {
// Standard float32.
v := float32(3.1415)
nv := (*float32)(nil)
pv := &v
vt := "float32"
vs := "3.1415"
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
// Standard float64.
v2 := float64(3.1415926)
nv2 := (*float64)(nil)
pv2 := &v2
v2t := "float64"
v2s := "3.1415926"
addDumpTest(v2, v2t+"("+v2s+")\n")
addDumpTest(pv2, "&"+v2t+"("+v2s+")\n")
addDumpTest(&pv2, "&&"+v2t+"("+v2s+")\n")
addDumpTest(nv2, "(*"+v2t+")(nil)\n")
// Standard float32 - integral value.
v3 := float32(3)
nv3 := (*float32)(nil)
pv3 := &v3
v3t := "float32"
v3s := "3"
addDumpTest(v3, v3t+"("+v3s+")\n")
addDumpTest(pv3, "&"+v3t+"("+v3s+")\n")
addDumpTest(&pv3, "&&"+v3t+"("+v3s+")\n")
addDumpTest(nv3, "(*"+v3t+")(nil)\n")
// Standard float64 - integral value.
v4 := float64(3)
nv4 := (*float64)(nil)
pv4 := &v4
v4t := "float64"
v4s := "3"
addDumpTest(v4, v4t+"("+v4s+")\n")
addDumpTest(pv4, "&"+v4t+"("+v4s+")\n")
addDumpTest(&pv4, "&&"+v4t+"("+v4s+")\n")
addDumpTest(nv4, "(*"+v4t+")(nil)\n")
}
func addComplexDumpTests() {
// Standard complex64.
v := complex(float32(6), -2)
nv := (*complex64)(nil)
pv := &v
vt := "complex64"
vs := "6-2i"
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
// Standard complex128.
v2 := complex(float64(-6), 2)
nv2 := (*complex128)(nil)
pv2 := &v2
v2t := "complex128"
v2s := "-6+2i"
addDumpTest(v2, v2t+"("+v2s+")\n")
addDumpTest(pv2, "&"+v2t+"("+v2s+")\n")
addDumpTest(&pv2, "&&"+v2t+"("+v2s+")\n")
addDumpTest(nv2, "(*"+v2t+")(nil)\n")
}
func addArrayDumpTests() {
// Array containing standard ints.
v := [3]int{1, 2, 3}
nv := (*[3]int)(nil)
pv := &v
vt := "int"
vs := "{\n " + vt + "(1),\n " + vt + "(2),\n " + vt + "(3),\n}"
addDumpTest(v, "[3]"+vt+vs+"\n")
addDumpTest(pv, "&[3]"+vt+vs+"\n")
addDumpTest(&pv, "&&[3]"+vt+vs+"\n")
addDumpTest(nv, "(*[3]"+vt+")(nil)\n")
// Array containing type with custom formatter on pointer receiver only.
v2i0 := pstringer("1")
v2i1 := pstringer("2")
v2i2 := pstringer("3")
v2 := [3]pstringer{v2i0, v2i1, v2i2}
nv2 := (*[3]pstringer)(nil)
pv2 := &v2
v2t := "utter_test.pstringer"
v2s := "{\n " + v2t + "(\"1\"),\n " + v2t + "(\"2\"),\n " + v2t + "(\"3\"),\n}"
addDumpTest(v2, "[3]"+v2t+v2s+"\n")
addDumpTest(pv2, "&[3]"+v2t+v2s+"\n")
addDumpTest(&pv2, "&&[3]"+v2t+v2s+"\n")
addDumpTest(nv2, "(*[3]"+v2t+")(nil)\n")
// Array containing interfaces.
v3i0 := "one"
v3 := [3]interface{}{v3i0, int(2), uint(3)}
nv3 := (*[3]interface{})(nil)
pv3 := &v3
v3t := "[3]interface{}"
v3t2 := "string"
v3t3 := "int"
v3t4 := "uint"
v3s := "{\n " + v3t2 + "(\"one\"),\n " + v3t3 + "(2),\n " + v3t4 + "(0x3),\n}"
addDumpTest(v3, v3t+v3s+"\n")
addDumpTest(pv3, "&"+v3t+v3s+"\n")
addDumpTest(&pv3, "&&"+v3t+v3s+"\n")
addDumpTest(nv3, "(*"+v3t+")(nil)\n")
// Array containing bytes.
v4 := [34]byte{
0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
0x31, 0x32,
}
nv4 := (*[34]byte)(nil)
pv4 := &v4
v4t := "[34]uint8"
v4s := "{\n" +
" 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, // |............... |\n" +
" 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, // |!\"#$%&'()*+,-./0|\n" +
" 0x31, 0x32, /* */ // |12|\n}"
addDumpTest(v4, v4t+v4s+"\n")
addDumpTest(pv4, "&"+v4t+v4s+"\n")
addDumpTest(&pv4, "&&"+v4t+v4s+"\n")
addDumpTest(nv4, "(*"+v4t+")(nil)\n")
}
func addSliceDumpTests() {
// Slice containing standard float32 values.
v := []float32{3.14, 6.28, 12.56}
nv := (*[]float32)(nil)
pv := &v
vt := "float32"
vs := "{\n " + vt + "(3.14),\n " + vt + "(6.28),\n " + vt + "(12.56),\n}"
addDumpTest(v, "[]"+vt+vs+"\n")
addDumpTest(pv, "&[]"+vt+vs+"\n")
addDumpTest(&pv, "&&[]"+vt+vs+"\n")
addDumpTest(nv, "(*[]"+vt+")(nil)\n")
// Slice containing type with custom formatter on pointer receiver only.
v2i0 := pstringer("1")
v2i1 := pstringer("2")
v2i2 := pstringer("3")
v2 := []pstringer{v2i0, v2i1, v2i2}
nv2 := (*[]pstringer)(nil)
pv2 := &v2
v2t := "utter_test.pstringer"
v2s := "{\n " + v2t + "(\"1\"),\n " + v2t + "(\"2\"),\n " + v2t + "(\"3\"),\n}"
addDumpTest(v2, "[]"+v2t+v2s+"\n")
addDumpTest(pv2, "&[]"+v2t+v2s+"\n")
addDumpTest(&pv2, "&&[]"+v2t+v2s+"\n")
addDumpTest(nv2, "(*[]"+v2t+")(nil)\n")
// Slice containing interfaces.
v3i0 := "one"
v3 := []interface{}{v3i0, int(2), uint(3), nil}
nv3 := (*[]interface{})(nil)
pv3 := &v3
v3t := "[]interface{}"
v3t2 := "string"
v3t3 := "int"
v3t4 := "uint"
v3t5 := "interface{}"
v3s := "{\n " + v3t2 + "(\"one\"),\n " + v3t3 + "(2),\n " + v3t4 + "(0x3),\n " + v3t5 + "(nil),\n}"
addDumpTest(v3, v3t+v3s+"\n")
addDumpTest(pv3, "&"+v3t+v3s+"\n")
addDumpTest(&pv3, "&&"+v3t+v3s+"\n")
addDumpTest(nv3, "(*"+v3t+")(nil)\n")
// Slice containing bytes.
v4 := []byte{
0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
0x31, 0x32,
}
nv4 := (*[]byte)(nil)
pv4 := &v4
v4t := "[]uint8"
v4s := "{\n" +
" 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, // |............... |\n" +
" 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30, // |!\"#$%&'()*+,-./0|\n" +
" 0x31, 0x32, /* */ // |12|\n}"
addDumpTest(v4, v4t+v4s+"\n")
addDumpTest(pv4, "&"+v4t+v4s+"\n")
addDumpTest(&pv4, "&&"+v4t+v4s+"\n")
addDumpTest(nv4, "(*"+v4t+")(nil)\n")
// Nil slice.
v5 := []int(nil)
nv5 := (*[]int)(nil)
pv5 := &v5
v5t := "[]int"
v5s := "nil"
addDumpTest(v5, v5t+"("+v5s+")\n")
addDumpTest(pv5, "&"+v5t+"("+v5s+")\n")
addDumpTest(&pv5, "&&"+v5t+"("+v5s+")\n")
addDumpTest(nv5, "(*"+v5t+")(nil)\n")
}
func addStringDumpTests() {
// Standard string.
v := "test"
nv := (*string)(nil)
pv := &v
vt := "string"
vs := "\"test\""
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
}
func addInterfaceDumpTests() {
// Nil interface.
var v interface{}
nv := (*interface{})(nil)
pv := &v
vt := "interface{}"
vs := "(nil)"
addDumpTest(v, "interface{}"+vs+"\n")
addDumpTest(pv, "&"+vt+vs+"\n")
addDumpTest(&pv, "&&"+vt+vs+"\n")
addDumpTest(nv, "(*"+vt+")"+vs+"\n")
// Sub-interface.
v2 := interface{}(uint16(65535))
pv2 := &v2
v2t := "uint16"
v2s := "0xffff"
addDumpTest(v2, v2t+"("+v2s+")\n")
addDumpTest(pv2, "&"+v2t+"("+v2s+")\n")
addDumpTest(&pv2, "&&"+v2t+"("+v2s+")\n")
}
func addMapDumpTests() {
// Map with string keys and int vals.
k := "one"
kk := "two"
m := map[string]int{k: 1, kk: 2}
nilMap := map[string]int(nil)
nm := (*map[string]int)(nil)
pm := &m
mt := "map[string]int"
mt1 := "string"
mt2 := "int"
ms := "{\n " + mt1 + "(\"one\"): " + mt2 + "(1),\n " + mt1 + "(\"two\"): " + mt2 + "(2),\n}"
ms2 := "{\n " + mt1 + "(\"two\"): " + mt2 + "(2),\n " + mt1 + "(\"one\"): " + mt2 + "(1),\n}"
addDumpTest(m, mt+ms+"\n", mt+ms2+"\n")
addDumpTest(pm, "&"+mt+ms+"\n", "&"+mt+ms2+"\n")
addDumpTest(&pm, "&&"+mt+ms+"\n", "&&"+mt+ms2+"\n")
addDumpTest(nm, "(*"+mt+")(nil)\n")
addDumpTest(nilMap, mt+"(nil)\n")
// Map with custom formatter type on pointer receiver only keys and vals.
k2 := pstringer("one")
v2 := pstringer("1")
m2 := map[pstringer]pstringer{k2: v2}
nilMap2 := map[pstringer]pstringer(nil)
nm2 := (*map[pstringer]pstringer)(nil)
pm2 := &m2
m2t := "map[utter_test.pstringer]utter_test.pstringer"
m2t1 := "utter_test.pstringer"
m2t2 := "utter_test.pstringer"
m2s := "{\n " + m2t1 + "(\"one\"): " + m2t2 + "(\"1\"),\n}"
addDumpTest(m2, m2t+m2s+"\n")
addDumpTest(pm2, "&"+m2t+m2s+"\n")
addDumpTest(&pm2, "&&"+m2t+m2s+"\n")
addDumpTest(nm2, "(*"+m2t+")(nil)\n")
addDumpTest(nilMap2, m2t+"(nil)\n")
// Map with interface keys and values.
k3 := "one"
m3 := map[interface{}]interface{}{k3: 1}
nilMap3 := map[interface{}]interface{}(nil)
nm3 := (*map[interface{}]interface{})(nil)
pm3 := &m3
m3t := "map[interface{}]interface{}"
m3t1 := "string"
m3t2 := "int"
m3s := "{\n " + m3t1 + "(\"one\"): " + m3t2 + "(1),\n}"
addDumpTest(m3, m3t+m3s+"\n")
addDumpTest(pm3, "&"+m3t+m3s+"\n")
addDumpTest(&pm3, "&&"+m3t+m3s+"\n")
addDumpTest(nm3, "(*"+m3t+")(nil)\n")
addDumpTest(nilMap3, m3t+"(nil)\n")
// Map with nil interface value.
k4 := "nil"
m4 := map[string]interface{}{k4: nil}
nilMap4 := map[string]interface{}(nil)
nm4 := (*map[string]interface{})(nil)
pm4 := &m4
m4t := "map[string]interface{}"
m4t1 := "string"
m4t2 := "interface{}"
m4s := "{\n " + m4t1 + "(\"nil\"): " + m4t2 + "(nil),\n}"
addDumpTest(m4, m4t+m4s+"\n")
addDumpTest(pm4, "&"+m4t+m4s+"\n")
addDumpTest(&pm4, "&&"+m4t+m4s+"\n")
addDumpTest(nm4, "(*"+m4t+")(nil)\n")
addDumpTest(nilMap4, m4t+"(nil)\n")
}
func addStructDumpTests() {
// Struct with primitives.
type s1 struct {
a int8
b uint8
}
v := s1{127, 255}
nv := (*s1)(nil)
pv := &v
vt := "utter_test.s1"
vt2 := "int8"
vt3 := "uint8"
vs := "{\n a: " + vt2 + "(127),\n b: " + vt3 + "(0xff),\n}"
addDumpTest(v, vt+vs+"\n")
addDumpTest(pv, "&"+vt+vs+"\n")
addDumpTest(&pv, "&&"+vt+vs+"\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
// Struct that contains another struct.
type s2 struct {
s1 s1
b bool
}
v2 := s2{s1{127, 255}, true}
nv2 := (*s2)(nil)
pv2 := &v2
v2t := "utter_test.s2"
v2t2 := "utter_test.s1"
v2t3 := "int8"
v2t4 := "uint8"
v2t5 := "bool"
v2s := "{\n s1: " + v2t2 + "{\n a: " + v2t3 + "(127),\n b: " + v2t4 + "(0xff),\n },\n b: " + v2t5 + "(true),\n}"
addDumpTest(v2, v2t+v2s+"\n")
addDumpTest(pv2, "&"+v2t+v2s+"\n")
addDumpTest(&pv2, "&&"+v2t+v2s+"\n")
addDumpTest(nv2, "(*"+v2t+")(nil)\n")
// Struct that contains custom type with Stringer pointer interface via both
// exported and unexported fields.
type s3 struct {
s pstringer
S pstringer
}
v3 := s3{"test", "test2"}
nv3 := (*s3)(nil)
pv3 := &v3
v3t := "utter_test.s3"
v3t2 := "utter_test.pstringer"
v3s := "{\n s: " + v3t2 + "(\"test\"),\n S: " + v3t2 + "(\"test2\"),\n}"
addDumpTest(v3, v3t+v3s+"\n")
addDumpTest(pv3, "&"+v3t+v3s+"\n")
addDumpTest(&pv3, "&&"+v3t+v3s+"\n")
addDumpTest(nv3, "(*"+v3t+")(nil)\n")
// Struct that contains embedded struct and field to same struct.
e := embed{"embedstr"}
v4 := embedwrap{embed: &e, e: &e}
nv4 := (*embedwrap)(nil)
pv4 := &v4
v4t := "utter_test.embedwrap"
v4t2 := "utter_test.embed"
v4t3 := "string"
v4s := "{\n embed: &" + v4t2 + "{\n a: " + v4t3 + "(\"embedstr\"),\n },\n e: (*" + v4t2 + ")(<already shown>),\n}"
addDumpTest(v4, v4t+v4s+"\n")
addDumpTest(pv4, "&"+v4t+v4s+"\n")
addDumpTest(&pv4, "&&"+v4t+v4s+"\n")
addDumpTest(nv4, "(*"+v4t+")(nil)\n")
// Struct that has fields that share a value in pointer that is not a cycle.
type ss5 struct{ s string }
type s5 struct {
p1 *ss5
p2 *ss5
}
ip1 := &ss5{"shared"}
v5 := s5{ip1, ip1}
v5t := "utter_test.s5"
v5s := "utter_test.ss5"
addDumpTest(v5, v5t+"{\n p1: &"+v5s+"{\n s: string(\"shared\"),\n },\n p2: (*"+v5s+")(<already shown>),\n}\n")
// Struct that has fields that share a value in pointer chain that is not a cycle.
type ss6 struct{ s string }
type s6 struct {
p1 **ss6
p2 **ss6
}
ipp1 := &ss6{"shared"}
v6 := s6{&ipp1, &ipp1}
v6t := "utter_test.s6"
v6s := "utter_test.ss6"
addDumpTest(v6, v6t+"{\n p1: &&"+v6s+"{\n s: string(\"shared\"),\n },\n p2: (**"+v6s+")(<already shown>),\n}\n")
}
func addUintptrDumpTests() {
// Null pointer.
v := uintptr(0)
pv := &v
vt := "uintptr"
vs := "0"
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
// Address of real variable.
i := 1
v2 := uintptr(unsafe.Pointer(&i))
nv2 := (*uintptr)(nil)
pv2 := &v2
v2t := "uintptr"
v2s := fmt.Sprintf("(%p)", &i)
addDumpTest(v2, v2t+v2s+"\n")
addDumpTest(pv2, "&"+v2t+v2s+"\n")
addDumpTest(&pv2, "&&"+v2t+v2s+"\n")
addDumpTest(nv2, "(*"+v2t+")(nil)\n")
}
func addUnsafePointerDumpTests() {
// Null pointer.
v := unsafe.Pointer(uintptr(0))
nv := (*unsafe.Pointer)(nil)
pv := &v
vt := "unsafe.Pointer"
vs := "nil"
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
// Address of real variable.
i := 1
v2 := unsafe.Pointer(&i)
pv2 := &v2
v2t := "unsafe.Pointer"
v2s := fmt.Sprintf("%p", &i)
addDumpTest(v2, v2t+"("+v2s+")\n")
addDumpTest(pv2, "&"+v2t+"("+v2s+")\n")
addDumpTest(&pv2, "&&"+v2t+"("+v2s+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
}
func addChanDumpTests() {
// Nil channel.
var v chan int
pv := &v
nv := (*chan int)(nil)
vt := "chan int"
vs := "nil"
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
// Real channel.
v2 := make(chan int)
pv2 := &v2
v2t := "chan int"
v2s := fmt.Sprintf("%p", v2)
addDumpTest(v2, v2t+"("+v2s+")\n")
addDumpTest(pv2, "&"+v2t+"("+v2s+")\n")
addDumpTest(&pv2, "&&"+v2t+"("+v2s+")\n")
// Real buffered channel, empty.
v3 := make(chan int, 1)
pv3 := &v3
v3t := "(chan int, 1)"
v3s := fmt.Sprintf("%p", v3)
addDumpTest(v3, v3t+"("+v3s+")\n")
addDumpTest(pv3, "&"+v3t+"("+v3s+")\n")
addDumpTest(&pv3, "&&"+v3t+"("+v3s+")\n")
// Real buffered channel with one element.
v4 := func() chan int { c := make(chan int, 2); c <- 1; return c }()
pv4 := &v4
v4t := "(chan int, 2 /* 1 element */)"
v4s := fmt.Sprintf("%p", v4)
addDumpTest(v4, v4t+"("+v4s+")\n")
addDumpTest(pv4, "&"+v4t+"("+v4s+")\n")
addDumpTest(&pv4, "&&"+v4t+"("+v4s+")\n")
// Real buffered channel with two elements.
v5 := func() chan int { c := make(chan int, 2); c <- 1; c <- 1; return c }()
pv5 := &v5
v5t := "(chan int, 2 /* 2 elements */)"
v5s := fmt.Sprintf("%p", v5)
addDumpTest(v5, v5t+"("+v5s+")\n")
addDumpTest(pv5, "&"+v5t+"("+v5s+")\n")
addDumpTest(&pv5, "&&"+v5t+"("+v5s+")\n")
// Real send only channel.
v6 := make(chan<- int)
pv6 := &v6
v6t := "chan<- int"
v6s := fmt.Sprintf("%p", v6)
addDumpTest(v6, v6t+"("+v6s+")\n")
addDumpTest(pv6, "&"+v6t+"("+v6s+")\n")
addDumpTest(&pv6, "&&"+v6t+"("+v6s+")\n")
// Real receive only channel.
v7 := make(<-chan int)
pv7 := &v7
v7t := "<-chan int"
v7s := fmt.Sprintf("%p", v7)
addDumpTest(v7, v7t+"("+v7s+")\n")
addDumpTest(pv7, "&"+v7t+"("+v7s+")\n")
addDumpTest(&pv7, "&&"+v7t+"("+v7s+")\n")
}
func addFuncDumpTests() {
// Function with no params and no returns.
v := addIntDumpTests
nv := (*func())(nil)
pv := &v
vt := "func()"
vs := fmt.Sprintf("%p", v)
addDumpTest(v, vt+"("+vs+")\n")
addDumpTest(pv, "&"+vt+"("+vs+")\n")
addDumpTest(&pv, "&&"+vt+"("+vs+")\n")
addDumpTest(nv, "(*"+vt+")(nil)\n")
// Function with param and no returns.
v2 := TestDump
nv2 := (*func(*testing.T))(nil)
pv2 := &v2
v2t := "func(*testing.T)"
v2s := fmt.Sprintf("%p", v2)
addDumpTest(v2, v2t+"("+v2s+")\n")
addDumpTest(pv2, "&"+v2t+"("+v2s+")\n")
addDumpTest(&pv2, "&&"+v2t+"("+v2s+")\n")
addDumpTest(nv2, "(*"+v2t+")(nil)\n")
// Function with multiple params and multiple returns.
var v3 = func(i int, s string) (b bool, err error) {
return true, nil
}
nv3 := (*func(int, string) (bool, error))(nil)
pv3 := &v3
v3t := "func(int, string) (bool, error)"
v3s := fmt.Sprintf("%p", v3)
addDumpTest(v3, v3t+"("+v3s+")\n")
addDumpTest(pv3, "&"+v3t+"("+v3s+")\n")
addDumpTest(&pv3, "&&"+v3t+"("+v3s+")\n")
addDumpTest(nv3, "(*"+v3t+")(nil)\n")
}
func addCircularDumpTests() {
// Struct that is circular through self referencing.
type circular struct {
c *circular
}
v := circular{nil}
v.c = &v
pv := &v
vt := "utter_test.circular"
vs := "{\n c: &" + vt + "{\n c: (*" + vt + ")(<already shown>),\n },\n}"
vs2 := "{\n c: (*" + vt + ")(<already shown>),\n}"
addDumpTest(v, vt+vs+"\n")
addDumpTest(pv, "&"+vt+vs2+"\n")
addDumpTest(&pv, "&&"+vt+vs2+"\n")
// Structs that are circular through cross referencing.
v2 := xref1{nil}
ts2 := xref2{&v2}
v2.ps2 = &ts2
pv2 := &v2
v2t := "utter_test.xref1"
v2t2 := "utter_test.xref2"
v2s := "{\n ps2: &" + v2t2 +
"{\n ps1: &" + v2t +
"{\n ps2: (*" + v2t2 + ")(<already shown>),\n },\n },\n}"
v2s2 := "{\n ps2: &" + v2t2 + "{\n ps1: (*" + v2t + ")(<already shown>),\n },\n}"
addDumpTest(v2, v2t+v2s+"\n")
addDumpTest(pv2, "&"+v2t+v2s2+"\n")
addDumpTest(&pv2, "&&"+v2t+v2s2+"\n")
// Structs that are indirectly circular.
v3 := indirCir1{nil}
tic2 := indirCir2{nil}
tic3 := indirCir3{&v3}
tic2.ps3 = &tic3
v3.ps2 = &tic2
pv3 := &v3
v3t := "utter_test.indirCir1"
v3t2 := "utter_test.indirCir2"
v3t3 := "utter_test.indirCir3"
v3s := "{\n ps2: &" + v3t2 +
"{\n ps3: &" + v3t3 +
"{\n ps1: &" + v3t +
"{\n ps2: (*" + v3t2 + ")(<already shown>),\n },\n },\n },\n}"
v3s2 := "{\n ps2: &" + v3t2 +
"{\n ps3: &" + v3t3 +
"{\n ps1: (*" + v3t + ")(<already shown>),\n },\n },\n}"
addDumpTest(v3, v3t+v3s+"\n")
addDumpTest(pv3, "&"+v3t+v3s2+"\n")
addDumpTest(&pv3, "&&"+v3t+v3s2+"\n")
}
// TestDump executes all of the tests described by dumpTests.
func TestDump(t *testing.T) {
// Setup tests.
addIntDumpTests()
addUintDumpTests()
addBoolDumpTests()
addFloatDumpTests()
addComplexDumpTests()
addArrayDumpTests()
addSliceDumpTests()
addStringDumpTests()
addInterfaceDumpTests()
addMapDumpTests()
addStructDumpTests()
addUintptrDumpTests()
addUnsafePointerDumpTests()
addChanDumpTests()
addFuncDumpTests()
addCircularDumpTests()
addCgoDumpTests()
t.Logf("Running %d tests", len(dumpTests))
for i, test := range dumpTests {
buf := new(bytes.Buffer)
utter.Fdump(buf, test.in)
s := buf.String()
if testFailed(s, test.wants) {
t.Errorf("Dump #%d\n got: %q\n %s", i, s, stringizeWants(test.wants))
continue
}
}
}
func TestDumpOmitZero(t *testing.T) {
cfg := utter.ConfigState{OmitZero: true, SortKeys: true}
type sub struct {
a, b int
}
type st struct {
i int
s string
v []int
m map[int]int
a [3]int
p *int
st sub
}
tests := []struct {
val st
expected string
}{
{
val: st{},
expected: "utter_test.st{\n}\n",
},
{
val: st{i: 1},
expected: "utter_test.st{\ni: int(1),\n}\n",
},
{
val: st{s: "string"},
expected: "utter_test.st{\ns: string(\"string\"),\n}\n",
},
{
val: st{v: []int{1, 2}},
expected: "utter_test.st{\nv: []int{int(1), int(2)},\n}\n",
},
{
val: st{m: map[int]int{1: -1, 2: -2}},
expected: "utter_test.st{\nm: map[int]int{\nint(1): int(-1),\nint(2): int(-2),\n},\n}\n",
},
{
val: st{a: [3]int{1, 2, 3}},
expected: "utter_test.st{\na: [3]int{int(1), int(2), int(3)},\n}\n",
},
{
val: st{p: new(int)},
expected: "utter_test.st{\np: &int(0),\n}\n",
},
{
val: st{st: sub{a: 1, b: 2}},
expected: "utter_test.st{\nst: utter_test.sub{\na: int(1),\nb: int(2),\n},\n}\n",
},
{
val: st{st: sub{a: 0, b: 2}},
expected: "utter_test.st{\nst: utter_test.sub{\nb: int(2),\n},\n}\n",
},
}
for i, test := range tests {
s := cfg.Sdump(test.val)
if s != test.expected {
t.Errorf("Dump #%d\n got: %q\n %q", i, s, test.expected)
}
}
}
func TestDumpSortedKeys(t *testing.T) {
cfg := utter.ConfigState{SortKeys: true}
tests := []struct {
m interface{}
expected string
}{
{
m: map[int]string{1: "1", 3: "3", 2: "2"},
expected: `map[int]string{
int(1): string("1"),
int(2): string("2"),
int(3): string("3"),
}
`,
},
{
m: map[float64]int{math.NaN(): 1, math.NaN(): 2, 0: 0, 1: 3},
expected: `map[float64]int{
float64(NaN): int(1),
float64(NaN): int(2),
float64(0): int(0),
float64(1): int(3),
}
`,
},
}
for _, test := range tests {
got := cfg.Sdump(test.m)
if got != test.expected {
t.Errorf("Sorted keys mismatch:\n %v %v", got, test.expected)
}
}
}
type limitedWriter struct {
limit int
buf bytes.Buffer
}
func newLimitedWriter(limit int) *limitedWriter {
return &limitedWriter{limit: limit}
}
func (w *limitedWriter) Write(b []byte) (int, error) {
n, err := w.buf.Write(b)
if err != nil {
return n, err
}
if len := w.buf.Len(); len > w.limit {
panic(fmt.Sprintf("buffer longer than limit: %d > %d:\n%s",
len, w.limit, w.buf.Bytes()))
}
return n, nil
}
var sliceElementCycles = []struct {
v interface{}
want string
}{
{
v: func() interface{} {
r := make([]interface{}, 1)
r[0] = r
return r
}(),
// We cannot detect the cycle until at least once around
// the cycle as the initial v seen by utter.Dump was not
// addressable.
want: `[]interface{}{
[]interface{}(<already shown>),