Fixes #57. Also renames files that came with a pull request such that they follow golang file naming conventions (underscores rather than dashes), mainly for consistency.

colorschemes/default_dark.go

@@ -1,7 +1,7 @@
 package colorschemes
 
 func init() {
-	register("defaultdark", Colorscheme{
+	register("default-dark", Colorscheme{
 		Fg: 235,
 		Bg: -1,
 

colorschemes/registry_test.go

@@ -0,0 +1,20 @@
+package colorschemes
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestColorRegistry(t *testing.T) {
+	colors := []string{"default", "default-dark", "solarized", "solarized16-dark", "solarized16-light", "monokai", "vice"}
+	zeroCS := Colorscheme{}
+	for _, cn := range colors {
+		c, e := FromName("", cn)
+		if e != nil {
+			t.Errorf("unexpected error fetching built-in color %s: %s", cn, e)
+		}
+		if reflect.DeepEqual(c, zeroCS) {
+			t.Error("expected a colorscheme, but got back a zero value.")
+		}
+	}
+}

colorschemes/solarized16_dark.go

@@ -3,7 +3,7 @@ package colorschemes
 // This scheme assumes the terminal already uses Solarized. Only DiskBar is
 // different between dark/light.
 func init() {
-	register("solarized16dark", Colorscheme{
+	register("solarized16-dark", Colorscheme{
 		Fg: -1,
 		Bg: -1,
 

colorschemes/solarized16_light.go

@@ -3,7 +3,7 @@ package colorschemes
 // This scheme assumes the terminal already uses Solarized. Only DiskBar is
 // different between dark/light.
 func init() {
-	register("solarized16light", Colorscheme{
+	register("solarized16-light", Colorscheme{
 		Fg: -1,
 		Bg: -1,