fix: repairs broken config unit-tests

Repairs the `config` unit-tests which were broken with `3.0.4`. It does
so by providing a simple switch that allows us to disable the resolution
of filesystem symlinks when running tests.

cmd/cheat/main.go

@@ -39,7 +39,7 @@ func main() {
 	}
 
 	// initialize the configs
-	conf, err := config.New(opts, confpath)
+	conf, err := config.New(opts, confpath, true)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "failed to load config: %v\n", err)
 		os.Exit(1)

internal/config/config.go

@@ -22,7 +22,7 @@ type Config struct {
 }
 
 // New returns a new Config struct
-func New(opts map[string]interface{}, confPath string) (Config, error) {
+func New(opts map[string]interface{}, confPath string, resolve bool) (Config, error) {
 
 	// read the config file
 	buf, err := ioutil.ReadFile(confPath)
@@ -49,13 +49,22 @@ func New(opts map[string]interface{}, confPath string) (Config, error) {
 		}
 
 		// follow symlinks
-		expanded, err = filepath.EvalSymlinks(expanded)
-		if err != nil {
-			return Config{}, fmt.Errorf(
-				"failed to resolve symlink: %s, %v",
-				expanded,
-				err,
-			)
+		//
+		// NB: `resolve` is an ugly kludge that exists for the sake of unit-tests.
+		// It's necessary because `EvalSymlinks` will error if the symlink points
+		// to a non-existent location on the filesystem. When unit-testing,
+		// however, we don't want to have dependencies on the filesystem. As such,
+		// `resolve` is a switch that allows us to turn off symlink resolution when
+		// running the config tests.
+		if resolve {
+			expanded, err = filepath.EvalSymlinks(expanded)
+			if err != nil {
+				return Config{}, fmt.Errorf(
+					"failed to resolve symlink: %s, %v",
+					expanded,
+					err,
+				)
+			}
 		}
 
 		conf.Cheatpaths[i].Path = expanded

internal/config/config_test.go

@@ -1,26 +1,23 @@
 package config
 
 import (
-	//"os"
-	//"path/filepath"
-	//"reflect"
+	"os"
+	"path/filepath"
+	"reflect"
 	"testing"
 
-	//"github.com/davecgh/go-spew/spew"
-	//"github.com/mitchellh/go-homedir"
+	"github.com/davecgh/go-spew/spew"
+	"github.com/mitchellh/go-homedir"
 
-	//"github.com/cheat/cheat/internal/cheatpath"
-	//"github.com/cheat/cheat/internal/mock"
+	"github.com/cheat/cheat/internal/cheatpath"
+	"github.com/cheat/cheat/internal/mock"
 )
 
-// BUG: changes pertaining to symlink handling introduced in 3.0.4 break this
-// test.
-/*
 // TestConfig asserts that the configs are loaded correctly
 func TestConfigSuccessful(t *testing.T) {
 
 	// initialize a config
-	conf, err := New(map[string]interface{}{}, mock.Path("conf/conf.yml"))
+	conf, err := New(map[string]interface{}{}, mock.Path("conf/conf.yml"), false)
 	if err != nil {
 		t.Errorf("failed to parse config file: %v", err)
 	}
@@ -66,14 +63,13 @@ func TestConfigSuccessful(t *testing.T) {
 		)
 	}
 }
-*/
 
 // TestConfigFailure asserts that an error is returned if the config file
 // cannot be read.
 func TestConfigFailure(t *testing.T) {
 
 	// attempt to read a non-existent config file
-	_, err := New(map[string]interface{}{}, "/does-not-exit")
+	_, err := New(map[string]interface{}{}, "/does-not-exit", false)
 	if err == nil {
 		t.Errorf("failed to error on unreadable config")
 	}
@@ -83,20 +79,19 @@ func TestConfigFailure(t *testing.T) {
 // specified in the configs
 func TestEmptyEditor(t *testing.T) {
 
-	/*
 	// clear the environment variables
 	os.Setenv("VISUAL", "")
 	os.Setenv("EDITOR", "")
 
 	// initialize a config
-	conf, err := New(map[string]interface{}{}, mock.Path("conf/empty.yml"))
+	conf, err := New(map[string]interface{}{}, mock.Path("conf/empty.yml"), false)
 	if err == nil {
 		t.Errorf("failed to return an error on empty editor")
 	}
 
 	// set editor, and assert that it is respected
 	os.Setenv("EDITOR", "foo")
-	conf, err = New(map[string]interface{}{}, mock.Path("conf/empty.yml"))
+	conf, err = New(map[string]interface{}{}, mock.Path("conf/empty.yml"), false)
 	if err != nil {
 		t.Errorf("failed to init configs: %v", err)
 	}
@@ -106,12 +101,11 @@ func TestEmptyEditor(t *testing.T) {
 
 	// set visual, and assert that it overrides editor
 	os.Setenv("VISUAL", "bar")
-	conf, err = New(map[string]interface{}{}, mock.Path("conf/empty.yml"))
+	conf, err = New(map[string]interface{}{}, mock.Path("conf/empty.yml"), false)
 	if err != nil {
 		t.Errorf("failed to init configs: %v", err)
 	}
 	if conf.Editor != "bar" {
 		t.Errorf("failed to respect editor: want: bar, got: %s", conf.Editor)
 	}
-	*/
 }