adding in logging

vendor/go.uber.org/zap/config_test.go

@@ -0,0 +1,108 @@
+// Copyright (c) 2016 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 zap
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestConfig(t *testing.T) {
+	tests := []struct {
+		desc     string
+		cfg      Config
+		expectN  int64
+		expectRe string
+	}{
+		{
+			desc:    "production",
+			cfg:     NewProductionConfig(),
+			expectN: 2 + 100 + 1, // 2 from initial logs, 100 initial sampled logs, 1 from off-by-one in sampler
+			expectRe: `{"level":"info","caller":"zap/config_test.go:\d+","msg":"info","k":"v","z":"zz"}` + "\n" +
+				`{"level":"warn","caller":"zap/config_test.go:\d+","msg":"warn","k":"v","z":"zz"}` + "\n",
+		},
+		{
+			desc:    "development",
+			cfg:     NewDevelopmentConfig(),
+			expectN: 3 + 200, // 3 initial logs, all 200 subsequent logs
+			expectRe: "DEBUG\tzap/config_test.go:" + `\d+` + "\tdebug\t" + `{"k": "v", "z": "zz"}` + "\n" +
+				"INFO\tzap/config_test.go:" + `\d+` + "\tinfo\t" + `{"k": "v", "z": "zz"}` + "\n" +
+				"WARN\tzap/config_test.go:" + `\d+` + "\twarn\t" + `{"k": "v", "z": "zz"}` + "\n" +
+				`go.uber.org/zap.Stack`,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.desc, func(t *testing.T) {
+			temp, err := ioutil.TempFile("", "zap-prod-config-test")
+			require.NoError(t, err, "Failed to create temp file.")
+			defer os.Remove(temp.Name())
+
+			tt.cfg.OutputPaths = []string{temp.Name()}
+			tt.cfg.EncoderConfig.TimeKey = "" // no timestamps in tests
+			tt.cfg.InitialFields = map[string]interface{}{"z": "zz", "k": "v"}
+
+			hook, count := makeCountingHook()
+			logger, err := tt.cfg.Build(Hooks(hook))
+			require.NoError(t, err, "Unexpected error constructing logger.")
+
+			logger.Debug("debug")
+			logger.Info("info")
+			logger.Warn("warn")
+
+			byteContents, err := ioutil.ReadAll(temp)
+			require.NoError(t, err, "Couldn't read log contents from temp file.")
+			logs := string(byteContents)
+			assert.Regexp(t, tt.expectRe, logs, "Unexpected log output.")
+
+			for i := 0; i < 200; i++ {
+				logger.Info("sampling")
+			}
+			assert.Equal(t, tt.expectN, count.Load(), "Hook called an unexpected number of times.")
+		})
+	}
+}
+
+func TestConfigWithInvalidPaths(t *testing.T) {
+	tests := []struct {
+		desc      string
+		output    string
+		errOutput string
+	}{
+		{"output directory doesn't exist", "/tmp/not-there/foo.log", "stderr"},
+		{"error output directory doesn't exist", "stdout", "/tmp/not-there/foo-errors.log"},
+		{"neither output directory exists", "/tmp/not-there/foo.log", "/tmp/not-there/foo-errors.log"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.desc, func(t *testing.T) {
+			cfg := NewProductionConfig()
+			cfg.OutputPaths = []string{tt.output}
+			cfg.ErrorOutputPaths = []string{tt.errOutput}
+			_, err := cfg.Build()
+			assert.Error(t, err, "Expected an error opening a non-existent directory.")
+		})
+	}
+}