token: extra numeric values + test TokenType case

+ Added tests for TokenType by checking case.
+ Added numeric conversion for float and integer like
  values from token.Extra.

Change-Id: I0909a4458ed58e33428afbf40478a668d150dda7
Reviewed-on: https://go-review.googlesource.com/15156
Reviewed-by: Andrew Gerrand <adg@golang.org>

token_test.go

@@ -41,6 +41,7 @@ func TestTokenExpiry(t *testing.T) {
 	}{
 		{name: "12 seconds", tok: &Token{Expiry: now.Add(12 * time.Second)}, want: false},
 		{name: "10 seconds", tok: &Token{Expiry: now.Add(expiryDelta)}, want: true},
+		{name: "-1 hour", tok: &Token{Expiry: now.Add(-1 * time.Hour)}, want: true},
 	}
 	for _, tc := range cases {
 		if got, want := tc.tok.expired(), tc.want; got != want {
@@ -48,3 +49,24 @@ func TestTokenExpiry(t *testing.T) {
 		}
 	}
 }
+
+func TestTokenTypeMethod(t *testing.T) {
+	cases := []struct {
+		name string
+		tok  *Token
+		want string
+	}{
+		{name: "bearer-mixed_case", tok: &Token{TokenType: "beAREr"}, want: "Bearer"},
+		{name: "default-bearer", tok: &Token{}, want: "Bearer"},
+		{name: "basic", tok: &Token{TokenType: "basic"}, want: "Basic"},
+		{name: "basic-capitalized", tok: &Token{TokenType: "Basic"}, want: "Basic"},
+		{name: "mac", tok: &Token{TokenType: "mac"}, want: "MAC"},
+		{name: "mac-caps", tok: &Token{TokenType: "MAC"}, want: "MAC"},
+		{name: "mac-mixed_case", tok: &Token{TokenType: "mAc"}, want: "MAC"},
+	}
+	for _, tc := range cases {
+		if got, want := tc.tok.Type(), tc.want; got != want {
+			t.Errorf("TokenType(%q) = %v; want %v", tc.name, got, want)
+		}
+	}
+}