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Usage: support implementsInterface() for non-struct types #206

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Usage: support implementsInterface() for non-struct types #206

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22 changes: 16 additions & 6 deletions envconfig_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -64,12 +64,14 @@ type Specification struct {
Property string `envconfig:"inner"`
PropertyWithDefault string `default:"fuzzybydefault"`
} `envconfig:"outer"`
AfterNested string
DecodeStruct HonorDecodeInStruct `envconfig:"honor"`
Datetime time.Time
MapField map[string]string `default:"one:two,three:four"`
UrlValue CustomURL
UrlPointer *CustomURL
AfterNested string
DecodeStruct HonorDecodeInStruct `envconfig:"honor"`
Datetime time.Time
MapField map[string]string `default:"one:two,three:four"`
UrlValue CustomURL
UrlPointer *CustomURL
NamedSliceValue NamedSlice
CustomSliceValue SliceWithUnmarshal
}

type Embedded struct {
Expand All @@ -86,6 +88,14 @@ type EmbeddedButIgnored struct {
SecondEmbeddedButIgnored string
}

type NamedSlice []int8

type SliceWithUnmarshal []int8

func (cs *SliceWithUnmarshal) UnmarshalText(text []byte) error {
return nil
}

func TestProcess(t *testing.T) {
var s Specification
os.Clearenv()
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2 changes: 2 additions & 0 deletions testdata/custom.txt
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Expand Up @@ -34,3 +34,5 @@ ENV_CONFIG_DATETIME=
ENV_CONFIG_MAPFIELD=
ENV_CONFIG_URLVALUE=
ENV_CONFIG_URLPOINTER=
ENV_CONFIG_NAMEDSLICEVALUE=
ENV_CONFIG_CUSTOMSLICEVALUE=
10 changes: 10 additions & 0 deletions testdata/default_list.txt
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Expand Up @@ -181,3 +181,13 @@ ENV_CONFIG_URLPOINTER
..[type]........CustomURL
..[default].....
..[required]....
ENV_CONFIG_NAMEDSLICEVALUE
..[description].
..[type]........Comma-separated.list.of.Integer
..[default].....
..[required]....
ENV_CONFIG_CUSTOMSLICEVALUE
..[description].
..[type]........SliceWithUnmarshal
..[default].....
..[required]....
2 changes: 2 additions & 0 deletions testdata/default_table.txt
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Expand Up @@ -38,3 +38,5 @@ ENV_CONFIG_DATETIME..............................Time...........................
ENV_CONFIG_MAPFIELD..............................Comma-separated.list.of.String:String.pairs.....one:two,three:four................
ENV_CONFIG_URLVALUE..............................CustomURL.........................................................................
ENV_CONFIG_URLPOINTER............................CustomURL.........................................................................
ENV_CONFIG_NAMEDSLICEVALUE.......................Comma-separated.list.of.Integer...................................................
ENV_CONFIG_CUSTOMSLICEVALUE......................SliceWithUnmarshal................................................................
2 changes: 2 additions & 0 deletions testdata/fault.txt
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Expand Up @@ -34,3 +34,5 @@
{.Key}
{.Key}
{.Key}
{.Key}
{.Key}
7 changes: 4 additions & 3 deletions usage.go
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Expand Up @@ -56,6 +56,10 @@ func implementsInterface(t reflect.Type) bool {

// toTypeDescription converts Go types into a human readable description
func toTypeDescription(t reflect.Type) string {
if implementsInterface(t) && t.Name() != "" {
return t.Name()
}

switch t.Kind() {
case reflect.Array, reflect.Slice:
if t.Elem().Kind() == reflect.Uint8 {
Expand All @@ -71,9 +75,6 @@ func toTypeDescription(t reflect.Type) string {
case reflect.Ptr:
return toTypeDescription(t.Elem())
case reflect.Struct:
if implementsInterface(t) && t.Name() != "" {
return t.Name()
}
return ""
case reflect.String:
name := t.Name()
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