Add some basic tests for utils

util_test.go

@@ -0,0 +1,81 @@
+// Copyright 2015, David Howden
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package tag
+
+import (
+	"testing"
+)
+
+func TestGetBit(t *testing.T) {
+	for i := uint(0); i < 8; i++ {
+		b := byte(1 << i)
+		got := getBit(b, i)
+		if !got {
+			t.Errorf("getBit(%v, %v) = %v, expected %v", b, i, got, true)
+		}
+	}
+}
+
+func TestGet7BitChunkedInt(t *testing.T) {
+	tests := []struct {
+		input  []byte
+		output int
+	}{
+		{
+			[]byte{},
+			0,
+		},
+		{
+			[]byte{0x01},
+			1,
+		},
+		{
+			[]byte{0x7F, 0x7F},
+			0x3FFF,
+		},
+	}
+
+	for ii, tt := range tests {
+		got := get7BitChunkedInt(tt.input)
+		if got != tt.output {
+			t.Errorf("[%d] get7BitChunkedInt(%v) = %v, expected %v", ii, tt.input, got, tt.output)
+		}
+	}
+}
+
+func TestGetInt(t *testing.T) {
+	tests := []struct {
+		input  []byte
+		output int
+	}{
+		{
+			[]byte{},
+			0,
+		},
+		{
+			[]byte{0x01},
+			1,
+		},
+		{
+			[]byte{0xF1, 0xF2},
+			0xF1F2,
+		},
+		{
+			[]byte{0xF1, 0xF2, 0xF3},
+			0xF1F2F3,
+		},
+		{
+			[]byte{0xF1, 0xF2, 0xF3, 0xF4},
+			0xF1F2F3F4,
+		},
+	}
+
+	for ii, tt := range tests {
+		got := getInt(tt.input)
+		if got != tt.output {
+			t.Errorf("[%d] getInt(%v) = %v, expected %v", ii, tt.input, got, tt.output)
+		}
+	}
+}