knative.dev/pkg@v0.0.0-20260602142205-ac97e43f6622/logging/logger_test.go (about)

     1  /*
     2  Copyright 2018 The Knative Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package logging
    18  
    19  import (
    20  	"context"
    21  	"testing"
    22  
    23  	"go.uber.org/zap"
    24  )
    25  
    26  func TestContext(t *testing.T) {
    27  	logger1 := zap.NewNop().Sugar()
    28  	logger2 := zap.NewExample().Sugar()
    29  
    30  	// Happy path tests
    31  	ctx := WithLogger(context.Background(), logger1)
    32  	checkFromContext(ctx, logger1, t)
    33  
    34  	ctx = WithLogger(ctx, logger2)
    35  	checkFromContext(ctx, logger2, t)
    36  
    37  	ctx = WithLogger(ctx, logger1)
    38  	checkFromContext(ctx, logger1, t)
    39  
    40  	// Empty logger
    41  	ctx = context.Background()
    42  	checkFromContext(ctx, fallbackLogger, t)
    43  
    44  	// Logger with a wrong type
    45  	ctx = context.WithValue(context.Background(), loggerKey{}, zap.NewNop())
    46  	checkFromContext(ctx, fallbackLogger, t)
    47  }
    48  
    49  func checkFromContext(ctx context.Context, want *zap.SugaredLogger, t *testing.T) {
    50  	if got := FromContext(ctx); want != got {
    51  		t.Errorf("unexpected logger in context. want: %v, got: %v", want, got)
    52  	}
    53  }