Catch more options errors at once; add test

options.go

@@ -1,10 +1,10 @@
 package main
 
 import (
-	"errors"
 	"fmt"
 	"net/url"
 	"regexp"
+	"strings"
 	"time"
 )
 
@@ -45,29 +45,33 @@ func NewOptions() *Options {
 }
 
 func (o *Options) Validate() error {
+	msgs := make([]string, 0)
 	if len(o.Upstreams) < 1 {
-		return errors.New("missing setting: upstream")
+		msgs = append(msgs, "missing setting: upstream")
 	}
 	if o.CookieSecret == "" {
-		errors.New("missing setting: cookie-secret")
+		msgs = append(msgs, "missing setting: cookie-secret")
 	}
 	if o.ClientID == "" {
-		return errors.New("missing setting: client-id")
+		msgs = append(msgs, "missing setting: client-id")
 	}
 	if o.ClientSecret == "" {
-		return errors.New("missing setting: client-secret")
+		msgs = append(msgs, "missing setting: client-secret")
 	}
 
 	redirectUrl, err := url.Parse(o.RedirectUrl)
 	if err != nil {
-		return fmt.Errorf("error parsing redirect-url=%q %s", o.RedirectUrl, err)
+		msgs = append(msgs, fmt.Sprintf(
+			"error parsing redirect-url=%q %s", o.RedirectUrl, err))
 	}
 	o.redirectUrl = redirectUrl
 
 	for _, u := range o.Upstreams {
 		upstreamUrl, err := url.Parse(u)
 		if err != nil {
-			return fmt.Errorf("error parsing upstream=%q %s", upstreamUrl, err)
+			msgs = append(msgs, fmt.Sprintf(
+				"error parsing upstream=%q %s",
+				upstreamUrl, err))
 		}
 		if upstreamUrl.Path == "" {
 			upstreamUrl.Path = "/"
@@ -78,10 +82,15 @@ func (o *Options) Validate() error {
 	for _, u := range o.SkipAuthRegex {
 		CompiledRegex, err := regexp.Compile(u)
 		if err != nil {
-			return fmt.Errorf("error compiling regex=%q %s", u, err)
+			msgs = append(msgs, fmt.Sprintf(
+				"error compiling regex=%q %s", u, err))
 		}
 		o.CompiledRegex = append(o.CompiledRegex, CompiledRegex)
 	}
 
+	if len(msgs) != 0 {
+		return fmt.Errorf("Invalid configuration:\n  %s",
+			strings.Join(msgs, "\n  "))
+	}
 	return nil
 }

options_test.go

@@ -0,0 +1,92 @@
+package main
+
+import (
+	"strings"
+	"testing"
+	"net/url"
+
+	"github.com/bmizerany/assert"
+)
+
+func testOptions() (*Options) {
+	o := NewOptions()
+	o.Upstreams = append(o.Upstreams, "http://127.0.0.1:8080/")
+	o.CookieSecret = "foobar"
+	o.ClientID = "bazquux"
+	o.ClientSecret = "xyzzyplugh"
+	return o
+}
+
+func errorMsg(msgs []string)(string) {
+	result := make([]string, 0)
+	result = append(result, "Invalid configuration:")
+	result = append(result, msgs...)
+	return strings.Join(result, "\n  ")
+}
+
+func TestNewOptions(t *testing.T) {
+	o := NewOptions()
+	err := o.Validate()
+	assert.NotEqual(t, nil, err)
+
+	expected := errorMsg([]string{
+		"missing setting: upstream",
+		"missing setting: cookie-secret",
+		"missing setting: client-id",
+		"missing setting: client-secret"})
+	assert.Equal(t, expected, err.Error())
+}
+
+func TestInitializedOptions(t *testing.T) {
+	o := testOptions()
+	assert.Equal(t, nil, o.Validate())
+}
+
+// Note that it's not worth testing nonparseable URLs, since url.Parse()
+// seems to parse damn near anything.
+func TestRedirectUrl(t *testing.T) {
+	o := testOptions()
+	o.RedirectUrl = "https://myhost.com/oauth2/callback"
+	assert.Equal(t, nil, o.Validate())
+	expected := &url.URL{
+		Scheme: "https", Host: "myhost.com", Path: "/oauth2/callback"}
+	assert.Equal(t, expected, o.redirectUrl)
+}
+
+func TestProxyUrls(t *testing.T) {
+	o := testOptions()
+	o.Upstreams = append(o.Upstreams, "http://127.0.0.1:8081")
+	assert.Equal(t, nil, o.Validate())
+	expected := []*url.URL{
+		&url.URL{Scheme: "http", Host: "127.0.0.1:8080", Path: "/"},
+		// note the '/' was added
+		&url.URL{Scheme: "http", Host: "127.0.0.1:8081", Path: "/"},
+	}
+	assert.Equal(t, expected, o.proxyUrls)
+}
+
+func TestCompiledRegex(t *testing.T) {
+	o := testOptions()
+	regexps := []string{"/foo/.*", "/ba[rz]/quux"}
+	o.SkipAuthRegex = regexps
+	assert.Equal(t, nil, o.Validate())
+	actual := make([]string, 0)
+	for _, regex := range o.CompiledRegex {
+		actual = append(actual, regex.String())
+	}
+	assert.Equal(t, regexps, actual)
+}
+
+func TestCompiledRegexError(t *testing.T) {
+	o := testOptions()
+	o.SkipAuthRegex = []string{"(foobaz", "barquux)"}
+	err := o.Validate()
+	assert.NotEqual(t, nil, err)
+
+	expected := errorMsg([]string{
+		"error compiling regex=\"(foobaz\" error parsing regexp: " +
+			"missing closing ): `(foobaz`",
+		"error compiling regex=\"barquux)\" error parsing regexp: " +
+			"unexpected ): `barquux)`"})
+	assert.Equal(t, expected, err.Error())
+}