implemented event and req

pkg/utils/atomic/uint32_test.go

@@ -0,0 +1,77 @@
+// Copyright (c) 2020 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+package atomic
+
+import (
+	"encoding/json"
+	"math"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestUint32(t *testing.T) {
+	atom := NewUint32(42)
+
+	require.Equal(t, uint32(42), atom.Load(), "Load didn't work.")
+	require.Equal(t, uint32(46), atom.Add(4), "Add didn't work.")
+	require.Equal(t, uint32(44), atom.Sub(2), "Sub didn't work.")
+	require.Equal(t, uint32(45), atom.Inc(), "Inc didn't work.")
+	require.Equal(t, uint32(44), atom.Dec(), "Dec didn't work.")
+
+	require.True(t, atom.CAS(44, 0), "CAS didn't report a swap.")
+	require.Equal(t, uint32(0), atom.Load(), "CAS didn't set the correct value.")
+
+	require.Equal(t, uint32(0), atom.Swap(1), "Swap didn't return the old value.")
+	require.Equal(t, uint32(1), atom.Load(), "Swap didn't set the correct value.")
+
+	atom.Store(42)
+	require.Equal(t, uint32(42), atom.Load(), "Store didn't set the correct value.")
+
+	t.Run("JSON/Marshal", func(t *testing.T) {
+		bytes, err := json.Marshal(atom)
+		require.NoError(t, err, "json.Marshal errored unexpectedly.")
+		require.Equal(t, []byte("42"), bytes, "json.Marshal encoded the wrong bytes.")
+	})
+
+	t.Run("JSON/Unmarshal", func(t *testing.T) {
+		err := json.Unmarshal([]byte("40"), &atom)
+		require.NoError(t, err, "json.Unmarshal errored unexpectedly.")
+		require.Equal(t, uint32(40), atom.Load(),
+			"json.Unmarshal didn't set the correct value.")
+	})
+
+	t.Run("JSON/Unmarshal/Error", func(t *testing.T) {
+		err := json.Unmarshal([]byte(`"40"`), &atom)
+		require.Error(t, err, "json.Unmarshal didn't error as expected.")
+		assertErrorJSONUnmarshalType(t, err,
+			"json.Unmarshal failed with unexpected error %v, want UnmarshalTypeError.", err)
+	})
+
+	t.Run("String", func(t *testing.T) {
+		// Use an integer with the signed bit set. If we're converting
+		// incorrectly, we'll get a negative value here.
+		atom := NewUint32(math.MaxUint32)
+		assert.Equal(t, "4294967295", atom.String(),
+			"String() returned an unexpected value.")
+	})
+}