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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,30 @@ | ||
| package aws | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/aws/aws-sdk-go-v2/aws" | ||
| "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs" | ||
| "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs/types" | ||
| ) | ||
|
|
||
| type cloudwatchLogsClientAPI interface { | ||
| GetLogEvents(ctx context.Context, params *cloudwatchlogs.GetLogEventsInput, optFns ...func(*cloudwatchlogs.Options)) (*cloudwatchlogs.GetLogEventsOutput, error) | ||
| } | ||
|
|
||
| type LogDetails struct { | ||
| logGroupName string | ||
| logStreamName string | ||
| } | ||
|
|
||
| func RetrieveLogs(ctx context.Context, cloudwatchLogsClientAPI cloudwatchLogsClientAPI, loggingDetails LogDetails) ([]types.OutputLogEvent, error) { | ||
| response, err := cloudwatchLogsClientAPI.GetLogEvents(ctx, &cloudwatchlogs.GetLogEventsInput{ | ||
| LogStreamName: &loggingDetails.logStreamName, | ||
| LogGroupName: &loggingDetails.logGroupName, | ||
| StartFromHead: aws.Bool(true), | ||
| }) | ||
| if err != nil { | ||
| return []types.OutputLogEvent{}, err | ||
| } | ||
| return response.Events, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| package aws | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "testing" | ||
|
|
||
| "github.com/aws/aws-sdk-go-v2/aws" | ||
| "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs" | ||
| "github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs/types" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| type mockCloudwatchLogsClient struct { | ||
| mockGetLogEvents func(ctx context.Context, params *cloudwatchlogs.GetLogEventsInput, optFns ...func(*cloudwatchlogs.Options)) (*cloudwatchlogs.GetLogEventsOutput, error) | ||
| } | ||
|
|
||
| func (m mockCloudwatchLogsClient) GetLogEvents(ctx context.Context, params *cloudwatchlogs.GetLogEventsInput, optFns ...func(*cloudwatchlogs.Options)) (*cloudwatchlogs.GetLogEventsOutput, error) { | ||
| return m.mockGetLogEvents(ctx, params, optFns...) | ||
| } | ||
|
|
||
| func TestRetrieveLogs(t *testing.T) { | ||
| input := LogDetails{ | ||
| logGroupName: "test-group", | ||
| logStreamName: "test-stream/test-container/07cc583696bd44e0be450bff7314ddaf", | ||
| } | ||
|
|
||
| events := []types.OutputLogEvent{ | ||
| { | ||
| IngestionTime: aws.Int64(0), | ||
| Message: aws.String("beans have been detected in the system"), | ||
| Timestamp: aws.Int64(0), | ||
| }, | ||
| { | ||
| IngestionTime: aws.Int64(1), | ||
| Message: aws.String("beans have been removed from the system"), | ||
| Timestamp: aws.Int64(1), | ||
| }, | ||
| } | ||
|
|
||
| positiveTests := []struct { | ||
| name string | ||
| input LogDetails | ||
| client mockCloudwatchLogsClient | ||
| expected []types.OutputLogEvent | ||
| }{ | ||
| { | ||
| // This is a regression test to ensure the function signature remains the same | ||
| name: "given a valid LogDetails input, return the events of the log stream", | ||
| input: input, | ||
| client: mockCloudwatchLogsClient{ | ||
| mockGetLogEvents: func(ctx context.Context, params *cloudwatchlogs.GetLogEventsInput, optFns ...func(*cloudwatchlogs.Options)) (*cloudwatchlogs.GetLogEventsOutput, error) { | ||
| return &cloudwatchlogs.GetLogEventsOutput{Events: events}, nil | ||
| }, | ||
| }, | ||
| expected: events, | ||
| }, | ||
| } | ||
|
|
||
| for _, tc := range positiveTests { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| result, err := RetrieveLogs(context.TODO(), tc.client, tc.input) | ||
|
|
||
| t.Logf("result: %v", result) | ||
| t.Logf("expected: %v", tc.expected) | ||
| assert.NoError(t, err) | ||
| assert.Equal(t, tc.expected, result) | ||
| }) | ||
| } | ||
|
|
||
| negativeTests := []struct { | ||
| name string | ||
| input LogDetails | ||
| client mockCloudwatchLogsClient | ||
| expected []types.OutputLogEvent | ||
| }{ | ||
| { | ||
| name: "when the underlying cloudwatch client experiences an error, return it in the function ", | ||
| input: input, | ||
| client: mockCloudwatchLogsClient{ | ||
| mockGetLogEvents: func(ctx context.Context, params *cloudwatchlogs.GetLogEventsInput, optFns ...func(*cloudwatchlogs.Options)) (*cloudwatchlogs.GetLogEventsOutput, error) { | ||
| return &cloudwatchlogs.GetLogEventsOutput{}, errors.New("generic cloudwatch error") | ||
| }, | ||
| }, | ||
| expected: []types.OutputLogEvent{}, | ||
| }, | ||
| } | ||
|
|
||
| for _, tc := range negativeTests { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| result, err := RetrieveLogs(context.TODO(), tc.client, tc.input) | ||
|
|
||
| t.Logf("result: %v", result) | ||
| t.Logf("expected: %v", tc.expected) | ||
| assert.Error(t, err) | ||
| assert.Equal(t, tc.expected, result) | ||
| }) | ||
| } | ||
| } |
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