metrics sanitization

Signed-off-by: Mohammed Al Sahaf <msaa1990@gmail.com>

internal/metrics/metrics_test.go

@@ -17,6 +17,37 @@ func TestSanitizeMethod(t *testing.T) {
 		{method: "trace", expected: "TRACE"},
 		{method: "UNKNOWN", expected: "OTHER"},
 		{method: strings.Repeat("ohno", 9999), expected: "OTHER"},
+
+		// Test all standard HTTP methods in uppercase
+		{method: "GET", expected: "GET"},
+		{method: "HEAD", expected: "HEAD"},
+		{method: "POST", expected: "POST"},
+		{method: "PUT", expected: "PUT"},
+		{method: "DELETE", expected: "DELETE"},
+		{method: "CONNECT", expected: "CONNECT"},
+		{method: "OPTIONS", expected: "OPTIONS"},
+		{method: "TRACE", expected: "TRACE"},
+		{method: "PATCH", expected: "PATCH"},
+
+		// Test all standard HTTP methods in lowercase
+		{method: "get", expected: "GET"},
+		{method: "head", expected: "HEAD"},
+		{method: "post", expected: "POST"},
+		{method: "put", expected: "PUT"},
+		{method: "delete", expected: "DELETE"},
+		{method: "connect", expected: "CONNECT"},
+		{method: "options", expected: "OPTIONS"},
+		{method: "trace", expected: "TRACE"},
+		{method: "patch", expected: "PATCH"},
+
+		// Test mixed case and non-standard methods
+		{method: "Get", expected: "OTHER"},
+		{method: "gEt", expected: "OTHER"},
+		{method: "UNKNOWN", expected: "OTHER"},
+		{method: "PROPFIND", expected: "OTHER"},
+		{method: "MKCOL", expected: "OTHER"},
+		{method: "", expected: "OTHER"},
+		{method: " ", expected: "OTHER"},
 	}
 
 	for _, d := range tests {
@@ -26,3 +57,79 @@ func TestSanitizeMethod(t *testing.T) {
 		}
 	}
 }
+
+func TestSanitizeCode(t *testing.T) {
+	tests := []struct {
+		name     string
+		code     int
+		expected string
+	}{
+		{
+			name:     "zero returns 200",
+			code:     0,
+			expected: "200",
+		},
+		{
+			name:     "200 returns 200",
+			code:     200,
+			expected: "200",
+		},
+		{
+			name:     "404 returns 404",
+			code:     404,
+			expected: "404",
+		},
+		{
+			name:     "500 returns 500",
+			code:     500,
+			expected: "500",
+		},
+		{
+			name:     "301 returns 301",
+			code:     301,
+			expected: "301",
+		},
+		{
+			name:     "418 teapot returns 418",
+			code:     418,
+			expected: "418",
+		},
+		{
+			name:     "999 custom code",
+			code:     999,
+			expected: "999",
+		},
+		{
+			name:     "negative code",
+			code:     -1,
+			expected: "-1",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := SanitizeCode(tt.code)
+			if result != tt.expected {
+				t.Errorf("SanitizeCode(%d) = %s; want %s", tt.code, result, tt.expected)
+			}
+		})
+	}
+}
+
+// BenchmarkSanitizeCode benchmarks the SanitizeCode function
+func BenchmarkSanitizeCode(b *testing.B) {
+	codes := []int{0, 200, 404, 500, 301, 418}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		SanitizeCode(codes[i%len(codes)])
+	}
+}
+
+// BenchmarkSanitizeMethod benchmarks the SanitizeMethod function
+func BenchmarkSanitizeMethod(b *testing.B) {
+	methods := []string{"GET", "POST", "PUT", "DELETE", "UNKNOWN"}
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		SanitizeMethod(methods[i%len(methods)])
+	}
+}