Add tests for hostname matching, and make DNS matches match entire string.

2 files changed, 52 insertions, 1 deletions

diff --git a/config.go b/config.go
index 949d426..c3e6d86 100644
--- a/config.go
+++ b/config.go
@@ -52,7 +52,7 @@ func dnsRegex(s string) (*regexp.Regexp, error) {
 			b = append(b, regexp.QuoteMeta(f))
 		}
 	}
-	return regexp.Compile(strings.Join(b, `\.`))
+	return regexp.Compile(fmt.Sprintf("^%s$", strings.Join(b, `\.`)))
 }
 
 // Match returns the backend for hostname.
diff --git a/config_test.go b/config_test.go
new file mode 100644
index 0000000..bcb9e5f
--- /dev/null
+++ b/config_test.go
@@ -0,0 +1,51 @@
+package main
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestConfig(t *testing.T) {
+	cases := []struct {
+		Config string
+		Tests  map[string]string
+	}{
+		{
+			Config: `
+# Comment
+go.universe.tf 1.2.3.4
+*.universe.tf 2.3.4.5
+# Comment
+google.* 3.4.5.6
+/gooo+gle\.com/ 4.5.6.7
+`,
+			Tests: map[string]string{
+				"go.universe.tf":     "1.2.3.4",
+				"foo.universe.tf":    "2.3.4.5",
+				"bar.universe.tf":    "2.3.4.5",
+				"google.com":         "3.4.5.6",
+				"google.fr":          "3.4.5.6",
+				"goooooooooogle.com": "4.5.6.7",
+
+				"blah.com":            "",
+				"google.com.br":       "",
+				"foo.bar.universe.tf": "",
+				"goooooglexcom":       "",
+			},
+		},
+	}
+
+	for _, test := range cases {
+		var cfg Config
+		if err := cfg.Read(bytes.NewBufferString(test.Config)); err != nil {
+			t.Fatalf("Failed to read config (%s):\n%q", err, test.Config)
+		}
+
+		for hostname, expected := range test.Tests {
+			actual := cfg.Match(hostname)
+			if expected != actual {
+				t.Errorf("cfg.Match(%q) is %q, want %q", hostname, actual, expected)
+			}
+		}
+	}
+}