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https://github.com/VictoriaMetrics/VictoriaMetrics.git
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43fc1183b9
This makes test code more clear and reduces the number of code lines by 500.
This also simplifies debugging tests. See https://itnext.io/f-tests-as-a-replacement-for-table-driven-tests-in-go-8814a8b19e9e
While at it, consistently use t.Fatal* instead of t.Error* across tests, since t.Error*
requires more boilerplate code, which can result in additional bugs inside tests.
While t.Error* allows writing logging errors for the same, this doesn't simplify fixing
broken tests most of the time.
This is a follow-up for a9525da8a4
61 lines
1.2 KiB
Go
61 lines
1.2 KiB
Go
package utils
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import (
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"errors"
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"fmt"
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"testing"
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)
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func TestErrGroup(t *testing.T) {
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f := func(errs []error, resultExpected string) {
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t.Helper()
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eg := &ErrGroup{}
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for _, err := range errs {
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eg.Add(err)
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}
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if len(errs) == 0 {
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if eg.Err() != nil {
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t.Fatalf("expected to get nil error")
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}
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return
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}
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if eg.Err() == nil {
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t.Fatalf("expected to get non-nil error")
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}
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result := eg.Error()
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if result != resultExpected {
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t.Fatalf("unexpected result\ngot\n%v\nwant\n%v", result, resultExpected)
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}
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}
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f(nil, "")
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f([]error{errors.New("timeout")}, "errors(1): timeout")
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f([]error{errors.New("timeout"), errors.New("deadline")}, "errors(2): timeout\ndeadline")
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}
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// TestErrGroupConcurrent supposed to test concurrent
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// use of error group.
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// Should be executed with -race flag
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func TestErrGroupConcurrent(_ *testing.T) {
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eg := new(ErrGroup)
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const writersN = 4
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payload := make(chan error, writersN)
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for i := 0; i < writersN; i++ {
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go func() {
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for err := range payload {
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eg.Add(err)
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}
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}()
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}
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const iterations = 500
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for i := 0; i < iterations; i++ {
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payload <- fmt.Errorf("error %d", i)
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if i%10 == 0 {
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_ = eg.Err()
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}
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}
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close(payload)
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}
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