Test Severity const match OTel spec (#4938)

Resolve #4912

log/severity_test.go

@@ -0,0 +1,220 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package log_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"go.opentelemetry.io/otel/log"
+)
+
+func TestSeverity(t *testing.T) {
+	// Test the Severity constants match the OTel values and short names.
+	testCases := []struct {
+		name     string
+		severity log.Severity
+		value    int
+		str      string
+	}{
+		{
+			name:     "SeverityTrace",
+			severity: log.SeverityTrace,
+			value:    1,
+			str:      "TRACE",
+		},
+		{
+			name:     "SeverityTrace1",
+			severity: log.SeverityTrace1,
+			value:    1,
+			str:      "TRACE",
+		},
+		{
+			name:     "SeverityTrace2",
+			severity: log.SeverityTrace2,
+			value:    2,
+			str:      "TRACE2",
+		},
+		{
+			name:     "SeverityTrace3",
+			severity: log.SeverityTrace3,
+			value:    3,
+			str:      "TRACE3",
+		},
+		{
+			name:     "SeverityTrace4",
+			severity: log.SeverityTrace4,
+			value:    4,
+			str:      "TRACE4",
+		},
+		{
+			name:     "SeverityDebug",
+			severity: log.SeverityDebug,
+			value:    5,
+			str:      "DEBUG",
+		},
+		{
+			name:     "SeverityDebug1",
+			severity: log.SeverityDebug1,
+			value:    5,
+			str:      "DEBUG",
+		},
+		{
+			name:     "SeverityDebug2",
+			severity: log.SeverityDebug2,
+			value:    6,
+			str:      "DEBUG2",
+		},
+		{
+			name:     "SeverityDebug3",
+			severity: log.SeverityDebug3,
+			value:    7,
+			str:      "DEBUG3",
+		},
+		{
+			name:     "SeverityDebug4",
+			severity: log.SeverityDebug4,
+			value:    8,
+			str:      "DEBUG4",
+		},
+		{
+			name:     "SeverityInfo",
+			severity: log.SeverityInfo,
+			value:    9,
+			str:      "INFO",
+		},
+		{
+			name:     "SeverityInfo1",
+			severity: log.SeverityInfo1,
+			value:    9,
+			str:      "INFO",
+		},
+		{
+			name:     "SeverityInfo2",
+			severity: log.SeverityInfo2,
+			value:    10,
+			str:      "INFO2",
+		},
+		{
+			name:     "SeverityInfo3",
+			severity: log.SeverityInfo3,
+			value:    11,
+			str:      "INFO3",
+		},
+		{
+			name:     "SeverityInfo4",
+			severity: log.SeverityInfo4,
+			value:    12,
+			str:      "INFO4",
+		},
+		{
+			name:     "SeverityWarn",
+			severity: log.SeverityWarn,
+			value:    13,
+			str:      "WARN",
+		},
+		{
+			name:     "SeverityWarn1",
+			severity: log.SeverityWarn1,
+			value:    13,
+			str:      "WARN",
+		},
+		{
+			name:     "SeverityWarn2",
+			severity: log.SeverityWarn2,
+			value:    14,
+			str:      "WARN2",
+		},
+		{
+			name:     "SeverityWarn3",
+			severity: log.SeverityWarn3,
+			value:    15,
+			str:      "WARN3",
+		},
+		{
+			name:     "SeverityWarn4",
+			severity: log.SeverityWarn4,
+			value:    16,
+			str:      "WARN4",
+		},
+		{
+			name:     "SeverityError",
+			severity: log.SeverityError,
+			value:    17,
+			str:      "ERROR",
+		},
+		{
+			name:     "SeverityError1",
+			severity: log.SeverityError1,
+			value:    17,
+			str:      "ERROR",
+		},
+		{
+			name:     "SeverityError2",
+			severity: log.SeverityError2,
+			value:    18,
+			str:      "ERROR2",
+		},
+		{
+			name:     "SeverityError3",
+			severity: log.SeverityError3,
+			value:    19,
+			str:      "ERROR3",
+		},
+		{
+			name:     "SeverityError4",
+			severity: log.SeverityError4,
+			value:    20,
+			str:      "ERROR4",
+		},
+		{
+			name:     "SeverityFatal",
+			severity: log.SeverityFatal,
+			value:    21,
+			str:      "FATAL",
+		},
+		{
+			name:     "SeverityFatal1",
+			severity: log.SeverityFatal1,
+			value:    21,
+			str:      "FATAL",
+		},
+		{
+			name:     "SeverityFatal2",
+			severity: log.SeverityFatal2,
+			value:    22,
+			str:      "FATAL2",
+		},
+		{
+			name:     "SeverityFatal3",
+			severity: log.SeverityFatal3,
+			value:    23,
+			str:      "FATAL3",
+		},
+		{
+			name:     "SeverityFatal4",
+			severity: log.SeverityFatal4,
+			value:    24,
+			str:      "FATAL4",
+		},
+	}
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			assert.Equal(t, tc.value, int(tc.severity), "value does not match OTel")
+			assert.Equal(t, tc.str, tc.severity.String(), "string does not match OTel")
+		})
+	}
+}