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envconfigfromfile_test.go
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envconfigfromfile_test.go
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package envconfigfromfile
import (
"io/ioutil"
"os"
"testing"
"github.com/kelseyhightower/envconfig"
)
type TestStruct struct {
TestField *EnvConfigFromFile `envconfig:"TEST_FIELD_FILE_PATH"`
}
type TestStructPathNotSet struct {
TestField *EnvConfigFromFile `envconfig:"TEST_FIELD_PATH_NOT_SET"`
}
type TestStructPathNotSetButRequired struct {
TestField *EnvConfigFromFile `envconfig:"TEST_FIELD_PATH_NOT_SET_BUT_REQUIRED" required:"true"`
}
type TestStructPathDoesNotExist struct {
TestField *EnvConfigFromFile `envconfig:"TEST_FIELD_PATH_DOES_NOT_EXIST"`
}
func TestEnvConfigFromFile(t *testing.T) {
testFilePath := "testdata/test_field_contents.txt"
testFileContents, _ := ioutil.ReadFile(testFilePath)
os.Clearenv()
os.Setenv("TEST_FIELD_FILE_PATH", testFilePath)
testStruct := TestStruct{}
err := envconfig.Process("", &testStruct)
if err != nil {
t.Error(err)
}
if testStruct.TestField.String() != string(testFileContents) {
t.Error(err)
}
}
func TestEnvConfigFromFilePathNotSet(t *testing.T) {
os.Clearenv()
testStruct := TestStructPathNotSet{}
err := envconfig.Process("", &testStruct)
if err != nil {
t.Errorf("envconfigfromfile: this test should not return an error. Got: %s", err.Error())
}
}
func TestEnvConfigFromFilePathNotSetButRequired(t *testing.T) {
os.Clearenv()
testStruct := TestStructPathNotSetButRequired{}
err := envconfig.Process("", &testStruct)
if err == nil {
t.Error("envconfigfromfile: this test should return an error")
}
expectedError := "required key TEST_FIELD_PATH_NOT_SET_BUT_REQUIRED missing value"
if err.Error() != expectedError {
t.Errorf("envconfigfromfile: the error returned does not match the expected value. Wanted: '%s' Got: '%s'", expectedError, err.Error())
}
}
func TestEnvConfigFromFilePathDoesNotExist(t *testing.T) {
testFilePath := "testdata/non_existent_file.txt"
os.Clearenv()
os.Setenv("TEST_FIELD_PATH_DOES_NOT_EXIST", testFilePath)
testStruct := TestStructPathDoesNotExist{}
err := envconfig.Process("", &testStruct)
if err == nil {
t.Error("envconfigfromfile: this test should return an error")
}
expectedError := "envconfig.Process: assigning TEST_FIELD_PATH_DOES_NOT_EXIST to TEST_FIELD_PATH_DOES_NOT_EXIST: converting 'testdata/non_existent_file.txt' to type envconfigfromfile.EnvConfigFromFile. details: envconfigfromfile: open testdata/non_existent_file.txt: no such file or directory"
if err.Error() != expectedError {
t.Errorf("envconfigfromfile: the error returned does not match the expected value. Wanted: '%s' Got: '%s'", expectedError, err.Error())
}
}