implemented event and req

pkg/utils/atomic/string_test.go

@@ -0,0 +1,170 @@
+// Copyright (c) 2016-2020 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"
+	"encoding/xml"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestStringNoInitialValue(t *testing.T) {
+	atom := &String{}
+	require.Equal(t, "", atom.Load(), "Initial value should be blank string")
+}
+
+func TestString(t *testing.T) {
+	atom := NewString("")
+	require.Equal(t, "", atom.Load(), "Expected Load to return initialized value")
+
+	atom.Store("abc")
+	require.Equal(t, "abc", atom.Load(), "Unexpected value after Store")
+
+	atom = NewString("bcd")
+	require.Equal(t, "bcd", atom.Load(), "Expected Load to return initialized 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(`"bcd"`), bytes, "json.Marshal encoded the wrong bytes.")
+	})
+
+	t.Run("JSON/Unmarshal", func(t *testing.T) {
+		err := json.Unmarshal([]byte(`"abc"`), &atom)
+		require.NoError(t, err, "json.Unmarshal errored unexpectedly.")
+		require.Equal(t, "abc", atom.Load(), "json.Unmarshal didn't set the correct value.")
+	})
+
+	t.Run("JSON/Unmarshal/Error", func(t *testing.T) {
+		err := json.Unmarshal([]byte("42"), &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)
+	})
+
+	atom = NewString("foo")
+
+	t.Run("XML/Marshal", func(t *testing.T) {
+		bytes, err := xml.Marshal(atom)
+		require.NoError(t, err, "xml.Marshal errored unexpectedly.")
+		require.Equal(t, []byte("<String>foo</String>"), bytes,
+			"xml.Marshal encoded the wrong bytes.")
+	})
+
+	t.Run("XML/Unmarshal", func(t *testing.T) {
+		err := xml.Unmarshal([]byte("<String>bar</String>"), &atom)
+		require.NoError(t, err, "xml.Unmarshal errored unexpectedly.")
+		require.Equal(t, "bar", atom.Load(), "xml.Unmarshal didn't set the correct value.")
+	})
+
+	t.Run("String", func(t *testing.T) {
+		atom := NewString("foo")
+		assert.Equal(t, "foo", atom.String(),
+			"String() returned an unexpected value.")
+	})
+
+	t.Run("CompareAndSwap", func(t *testing.T) {
+		atom := NewString("foo")
+
+		swapped := atom.CompareAndSwap("bar", "bar")
+		require.False(t, swapped, "swapped isn't false")
+		require.Equal(t, atom.Load(), "foo", "Load returned wrong value")
+
+		swapped = atom.CompareAndSwap("foo", "bar")
+		require.True(t, swapped, "swapped isn't true")
+		require.Equal(t, atom.Load(), "bar", "Load returned wrong value")
+	})
+
+	t.Run("Swap", func(t *testing.T) {
+		atom := NewString("foo")
+
+		old := atom.Swap("bar")
+		require.Equal(t, old, "foo", "Swap returned wrong value")
+		require.Equal(t, atom.Load(), "bar", "Load returned wrong value")
+	})
+}
+
+func TestString_InitializeDefault(t *testing.T) {
+	tests := []struct {
+		msg    string
+		newStr func() *String
+	}{
+		{
+			msg: "Uninitialized",
+			newStr: func() *String {
+				var s String
+				return &s
+			},
+		},
+		{
+			msg: "NewString with default",
+			newStr: func() *String {
+				return NewString("")
+			},
+		},
+		{
+			msg: "String swapped with default",
+			newStr: func() *String {
+				s := NewString("initial")
+				s.Swap("")
+				return s
+			},
+		},
+		{
+			msg: "String CAS'd with default",
+			newStr: func() *String {
+				s := NewString("initial")
+				s.CompareAndSwap("initial", "")
+				return s
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.msg, func(t *testing.T) {
+			t.Run("MarshalText", func(t *testing.T) {
+				str := tt.newStr()
+				text, err := str.MarshalText()
+				require.NoError(t, err)
+				assert.Equal(t, "", string(text), "")
+			})
+
+			t.Run("String", func(t *testing.T) {
+				str := tt.newStr()
+				assert.Equal(t, "", str.String())
+			})
+
+			t.Run("CompareAndSwap", func(t *testing.T) {
+				str := tt.newStr()
+				require.True(t, str.CompareAndSwap("", "new"))
+				assert.Equal(t, "new", str.Load())
+			})
+
+			t.Run("Swap", func(t *testing.T) {
+				str := tt.newStr()
+				assert.Equal(t, "", str.Swap("new"))
+			})
+		})
+	}
+}