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package funcs
import (
"fmt"
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"path/filepath"
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"testing"
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homedir "github.com/mitchellh/go-homedir"
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"github.com/zclconf/go-cty/cty"
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"github.com/zclconf/go-cty/cty/function"
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"github.com/zclconf/go-cty/cty/function/stdlib"
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)
func TestFile ( t * testing . T ) {
tests := [ ] struct {
Path cty . Value
Want cty . Value
Err bool
} {
{
cty . StringVal ( "testdata/hello.txt" ) ,
cty . StringVal ( "Hello World" ) ,
false ,
} ,
{
cty . StringVal ( "testdata/icon.png" ) ,
cty . NilVal ,
true , // Not valid UTF-8
} ,
{
cty . StringVal ( "testdata/missing" ) ,
cty . NilVal ,
true , // no file exists
} ,
}
for _ , test := range tests {
t . Run ( fmt . Sprintf ( "File(\".\", %#v)" , test . Path ) , func ( t * testing . T ) {
got , err := File ( "." , test . Path )
if test . Err {
if err == nil {
t . Fatal ( "succeeded; want error" )
}
return
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} else if err != nil {
t . Fatalf ( "unexpected error: %s" , err )
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}
if ! got . RawEquals ( test . Want ) {
t . Errorf ( "wrong result\ngot: %#v\nwant: %#v" , got , test . Want )
}
} )
}
}
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func TestTemplateFile ( t * testing . T ) {
tests := [ ] struct {
Path cty . Value
Vars cty . Value
Want cty . Value
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Err string
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} {
{
cty . StringVal ( "testdata/hello.txt" ) ,
cty . EmptyObjectVal ,
cty . StringVal ( "Hello World" ) ,
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` ` ,
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} ,
{
cty . StringVal ( "testdata/icon.png" ) ,
cty . EmptyObjectVal ,
cty . NilVal ,
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` contents of testdata/icon.png are not valid UTF-8; use the filebase64 function to obtain the Base64 encoded contents or the other file functions (e.g. filemd5, filesha256) to obtain file hashing results instead ` ,
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} ,
{
cty . StringVal ( "testdata/missing" ) ,
cty . EmptyObjectVal ,
cty . NilVal ,
lang/funcs: Filesystem functions hint about dynamically-generated files
The functions that interact with the filesystem are, by design, restricted
to reading files that are distributed as a static part of the
configuration, and cannot be used to interact with files that are
generated dynamically by resources in the configuration.
However, new users have often yet developed a correct mental model of how
Terraform execution works and are confused by the terse error messages
these functions return. As an interim step to help some of those users,
this just adds some more commentary to the error message which gives a
vague, generic directive to look to attributes of the resource that is
generating the file, which should (if it's designed well) export
attributes that allow the resulting file to be used effectively with
common patterns, such as checksums of the content of the generated file.
The error message here is not particularly attractive due to the
limitations of the context where it's being returned from, but I'm
accepting that here in the interest of keeping this change simple, so we
can give a hint about a case that seems to frequently generate new-user
questions. We may iterate further on the presentation of this message
later.
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` no file exists at testdata/missing; this function works only with files that are distributed as part of the configuration source code, so if this file will be created by a resource in this configuration you must instead obtain this result from an attribute of that resource ` ,
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} ,
{
cty . StringVal ( "testdata/hello.tmpl" ) ,
cty . MapVal ( map [ string ] cty . Value {
"name" : cty . StringVal ( "Jodie" ) ,
} ) ,
cty . StringVal ( "Hello, Jodie!" ) ,
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` ` ,
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} ,
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{
cty . StringVal ( "testdata/hello.tmpl" ) ,
cty . MapVal ( map [ string ] cty . Value {
"name!" : cty . StringVal ( "Jodie" ) ,
} ) ,
cty . NilVal ,
` invalid template variable name "name!": must start with a letter, followed by zero or more letters, digits, and underscores ` ,
} ,
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{
cty . StringVal ( "testdata/hello.tmpl" ) ,
cty . ObjectVal ( map [ string ] cty . Value {
"name" : cty . StringVal ( "Jimbo" ) ,
} ) ,
cty . StringVal ( "Hello, Jimbo!" ) ,
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` ` ,
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} ,
{
cty . StringVal ( "testdata/hello.tmpl" ) ,
cty . EmptyObjectVal ,
cty . NilVal ,
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` vars map does not contain key "name", referenced at testdata/hello.tmpl:1,10-14 ` ,
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} ,
{
cty . StringVal ( "testdata/func.tmpl" ) ,
cty . ObjectVal ( map [ string ] cty . Value {
"list" : cty . ListVal ( [ ] cty . Value {
cty . StringVal ( "a" ) ,
cty . StringVal ( "b" ) ,
cty . StringVal ( "c" ) ,
} ) ,
} ) ,
cty . StringVal ( "The items are a, b, c" ) ,
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` ` ,
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} ,
{
cty . StringVal ( "testdata/recursive.tmpl" ) ,
cty . MapValEmpty ( cty . String ) ,
cty . NilVal ,
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` testdata/recursive.tmpl:1,3-16: Error in function call; Call to function "templatefile" failed: cannot recursively call templatefile from inside templatefile call. ` ,
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} ,
{
cty . StringVal ( "testdata/list.tmpl" ) ,
cty . ObjectVal ( map [ string ] cty . Value {
"list" : cty . ListVal ( [ ] cty . Value {
cty . StringVal ( "a" ) ,
cty . StringVal ( "b" ) ,
cty . StringVal ( "c" ) ,
} ) ,
} ) ,
cty . StringVal ( "- a\n- b\n- c\n" ) ,
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` ` ,
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} ,
{
cty . StringVal ( "testdata/list.tmpl" ) ,
cty . ObjectVal ( map [ string ] cty . Value {
"list" : cty . True ,
} ) ,
cty . NilVal ,
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` testdata/list.tmpl:1,13-17: Iteration over non-iterable value; A value of type bool cannot be used as the collection in a 'for' expression. ` ,
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} ,
{
cty . StringVal ( "testdata/bare.tmpl" ) ,
cty . ObjectVal ( map [ string ] cty . Value {
"val" : cty . True ,
} ) ,
cty . True , // since this template contains only an interpolation, its true value shines through
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` ` ,
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} ,
}
templateFileFn := MakeTemplateFileFunc ( "." , func ( ) map [ string ] function . Function {
return map [ string ] function . Function {
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"join" : stdlib . JoinFunc ,
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"templatefile" : MakeFileFunc ( "." , false ) , // just a placeholder, since templatefile itself overrides this
}
} )
for _ , test := range tests {
t . Run ( fmt . Sprintf ( "TemplateFile(%#v, %#v)" , test . Path , test . Vars ) , func ( t * testing . T ) {
got , err := templateFileFn . Call ( [ ] cty . Value { test . Path , test . Vars } )
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if argErr , ok := err . ( function . ArgError ) ; ok {
if argErr . Index < 0 || argErr . Index > 1 {
t . Errorf ( "ArgError index %d is out of range for templatefile (must be 0 or 1)" , argErr . Index )
}
}
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if test . Err != "" {
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if err == nil {
t . Fatal ( "succeeded; want error" )
}
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if got , want := err . Error ( ) , test . Err ; got != want {
t . Errorf ( "wrong error\ngot: %s\nwant: %s" , got , want )
}
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return
} else if err != nil {
t . Fatalf ( "unexpected error: %s" , err )
}
if ! got . RawEquals ( test . Want ) {
t . Errorf ( "wrong result\ngot: %#v\nwant: %#v" , got , test . Want )
}
} )
}
}
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func TestFileExists ( t * testing . T ) {
tests := [ ] struct {
Path cty . Value
Want cty . Value
Err bool
} {
{
cty . StringVal ( "testdata/hello.txt" ) ,
cty . BoolVal ( true ) ,
false ,
} ,
{
cty . StringVal ( "" ) , // empty path
cty . BoolVal ( false ) ,
true ,
} ,
{
cty . StringVal ( "testdata/missing" ) ,
cty . BoolVal ( false ) ,
false , // no file exists
} ,
}
for _ , test := range tests {
t . Run ( fmt . Sprintf ( "FileExists(\".\", %#v)" , test . Path ) , func ( t * testing . T ) {
got , err := FileExists ( "." , test . Path )
if test . Err {
if err == nil {
t . Fatal ( "succeeded; want error" )
}
return
} else if err != nil {
t . Fatalf ( "unexpected error: %s" , err )
}
if ! got . RawEquals ( test . Want ) {
t . Errorf ( "wrong result\ngot: %#v\nwant: %#v" , got , test . Want )
}
} )
}
}
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func TestFileSet ( t * testing . T ) {
tests := [ ] struct {
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Path cty . Value
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Pattern cty . Value
Want cty . Value
Err bool
} {
{
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cty . StringVal ( "." ) ,
cty . StringVal ( "testdata*" ) ,
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cty . SetValEmpty ( cty . String ) ,
false ,
} ,
{
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cty . StringVal ( "." ) ,
cty . StringVal ( "testdata" ) ,
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cty . SetValEmpty ( cty . String ) ,
false ,
} ,
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{
cty . StringVal ( "." ) ,
cty . StringVal ( "{testdata,missing}" ) ,
cty . SetValEmpty ( cty . String ) ,
false ,
} ,
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{
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cty . StringVal ( "." ) ,
cty . StringVal ( "testdata/missing" ) ,
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cty . SetValEmpty ( cty . String ) ,
false ,
} ,
{
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cty . StringVal ( "." ) ,
cty . StringVal ( "testdata/missing*" ) ,
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cty . SetValEmpty ( cty . String ) ,
false ,
} ,
{
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cty . StringVal ( "." ) ,
cty . StringVal ( "*/missing" ) ,
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cty . SetValEmpty ( cty . String ) ,
false ,
} ,
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{
cty . StringVal ( "." ) ,
cty . StringVal ( "**/missing" ) ,
cty . SetValEmpty ( cty . String ) ,
false ,
} ,
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{
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cty . StringVal ( "." ) ,
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cty . StringVal ( "testdata/*.txt" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
{
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cty . StringVal ( "." ) ,
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cty . StringVal ( "testdata/hello.txt" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
{
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cty . StringVal ( "." ) ,
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cty . StringVal ( "testdata/hello.???" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
{
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cty . StringVal ( "." ) ,
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cty . StringVal ( "testdata/hello*" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.tmpl" ) ,
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
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{
cty . StringVal ( "." ) ,
cty . StringVal ( "testdata/hello.{tmpl,txt}" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.tmpl" ) ,
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
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{
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cty . StringVal ( "." ) ,
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cty . StringVal ( "*/hello.txt" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
{
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cty . StringVal ( "." ) ,
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cty . StringVal ( "*/*.txt" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
{
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cty . StringVal ( "." ) ,
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cty . StringVal ( "*/hello*" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.tmpl" ) ,
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
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{
cty . StringVal ( "." ) ,
cty . StringVal ( "**/hello*" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.tmpl" ) ,
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
{
cty . StringVal ( "." ) ,
cty . StringVal ( "**/hello.{tmpl,txt}" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "testdata/hello.tmpl" ) ,
cty . StringVal ( "testdata/hello.txt" ) ,
} ) ,
false ,
} ,
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{
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cty . StringVal ( "." ) ,
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cty . StringVal ( "[" ) ,
cty . SetValEmpty ( cty . String ) ,
true ,
} ,
{
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cty . StringVal ( "." ) ,
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cty . StringVal ( "\\" ) ,
cty . SetValEmpty ( cty . String ) ,
true ,
} ,
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{
cty . StringVal ( "testdata" ) ,
cty . StringVal ( "missing" ) ,
cty . SetValEmpty ( cty . String ) ,
false ,
} ,
{
cty . StringVal ( "testdata" ) ,
cty . StringVal ( "missing*" ) ,
cty . SetValEmpty ( cty . String ) ,
false ,
} ,
{
cty . StringVal ( "testdata" ) ,
cty . StringVal ( "*.txt" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "hello.txt" ) ,
} ) ,
false ,
} ,
{
cty . StringVal ( "testdata" ) ,
cty . StringVal ( "hello.txt" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "hello.txt" ) ,
} ) ,
false ,
} ,
{
cty . StringVal ( "testdata" ) ,
cty . StringVal ( "hello.???" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "hello.txt" ) ,
} ) ,
false ,
} ,
{
cty . StringVal ( "testdata" ) ,
cty . StringVal ( "hello*" ) ,
cty . SetVal ( [ ] cty . Value {
cty . StringVal ( "hello.tmpl" ) ,
cty . StringVal ( "hello.txt" ) ,
} ) ,
false ,
} ,
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}
for _ , test := range tests {
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t . Run ( fmt . Sprintf ( "FileSet(\".\", %#v, %#v)" , test . Path , test . Pattern ) , func ( t * testing . T ) {
got , err := FileSet ( "." , test . Path , test . Pattern )
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if test . Err {
if err == nil {
t . Fatal ( "succeeded; want error" )
}
return
} else if err != nil {
t . Fatalf ( "unexpected error: %s" , err )
}
if ! got . RawEquals ( test . Want ) {
t . Errorf ( "wrong result\ngot: %#v\nwant: %#v" , got , test . Want )
}
} )
}
}
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func TestFileBase64 ( t * testing . T ) {
tests := [ ] struct {
Path cty . Value
Want cty . Value
Err bool
} {
{
cty . StringVal ( "testdata/hello.txt" ) ,
cty . StringVal ( "SGVsbG8gV29ybGQ=" ) ,
false ,
} ,
{
cty . StringVal ( "testdata/icon.png" ) ,
cty . StringVal ( "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" ) ,
false ,
} ,
{
cty . StringVal ( "testdata/missing" ) ,
cty . NilVal ,
true , // no file exists
} ,
}
for _ , test := range tests {
t . Run ( fmt . Sprintf ( "FileBase64(\".\", %#v)" , test . Path ) , func ( t * testing . T ) {
got , err := FileBase64 ( "." , test . Path )
if test . Err {
if err == nil {
t . Fatal ( "succeeded; want error" )
}
return
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} else if err != nil {
t . Fatalf ( "unexpected error: %s" , err )
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}
if ! got . RawEquals ( test . Want ) {
t . Errorf ( "wrong result\ngot: %#v\nwant: %#v" , got , test . Want )
}
} )
}
}
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func TestBasename ( t * testing . T ) {
tests := [ ] struct {
Path cty . Value
Want cty . Value
Err bool
} {
{
cty . StringVal ( "testdata/hello.txt" ) ,
cty . StringVal ( "hello.txt" ) ,
false ,
} ,
{
cty . StringVal ( "hello.txt" ) ,
cty . StringVal ( "hello.txt" ) ,
false ,
} ,
{
cty . StringVal ( "" ) ,
cty . StringVal ( "." ) ,
false ,
} ,
}
for _ , test := range tests {
t . Run ( fmt . Sprintf ( "Basename(%#v)" , test . Path ) , func ( t * testing . T ) {
got , err := Basename ( test . Path )
if test . Err {
if err == nil {
t . Fatal ( "succeeded; want error" )
}
return
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} else if err != nil {
t . Fatalf ( "unexpected error: %s" , err )
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}
if ! got . RawEquals ( test . Want ) {
t . Errorf ( "wrong result\ngot: %#v\nwant: %#v" , got , test . Want )
}
} )
}
}
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func TestDirname ( t * testing . T ) {
tests := [ ] struct {
Path cty . Value
Want cty . Value
Err bool
} {
{
cty . StringVal ( "testdata/hello.txt" ) ,
cty . StringVal ( "testdata" ) ,
false ,
} ,
{
cty . StringVal ( "testdata/foo/hello.txt" ) ,
cty . StringVal ( "testdata/foo" ) ,
false ,
} ,
{
cty . StringVal ( "hello.txt" ) ,
cty . StringVal ( "." ) ,
false ,
} ,
{
cty . StringVal ( "" ) ,
cty . StringVal ( "." ) ,
false ,
} ,
}
for _ , test := range tests {
t . Run ( fmt . Sprintf ( "Dirname(%#v)" , test . Path ) , func ( t * testing . T ) {
got , err := Dirname ( test . Path )
if test . Err {
if err == nil {
t . Fatal ( "succeeded; want error" )
}
return
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} else if err != nil {
t . Fatalf ( "unexpected error: %s" , err )
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}
if ! got . RawEquals ( test . Want ) {
t . Errorf ( "wrong result\ngot: %#v\nwant: %#v" , got , test . Want )
}
} )
}
}
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func TestPathExpand ( t * testing . T ) {
homePath , err := homedir . Dir ( )
if err != nil {
t . Fatalf ( "Error getting home directory: %v" , err )
}
tests := [ ] struct {
Path cty . Value
Want cty . Value
Err bool
} {
{
cty . StringVal ( "~/test-file" ) ,
cty . StringVal ( filepath . Join ( homePath , "test-file" ) ) ,
false ,
} ,
{
cty . StringVal ( "~/another/test/file" ) ,
cty . StringVal ( filepath . Join ( homePath , "another/test/file" ) ) ,
false ,
} ,
{
cty . StringVal ( "/root/file" ) ,
cty . StringVal ( "/root/file" ) ,
false ,
} ,
{
cty . StringVal ( "/" ) ,
cty . StringVal ( "/" ) ,
false ,
} ,
}
for _ , test := range tests {
t . Run ( fmt . Sprintf ( "Dirname(%#v)" , test . Path ) , func ( t * testing . T ) {
got , err := Pathexpand ( test . Path )
if test . Err {
if err == nil {
t . Fatal ( "succeeded; want error" )
}
return
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} else if err != nil {
t . Fatalf ( "unexpected error: %s" , err )
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}
if ! got . RawEquals ( test . Want ) {
t . Errorf ( "wrong result\ngot: %#v\nwant: %#v" , got , test . Want )
}
} )
}
}