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fix: ensure experiments return nil when we want to submit (#654)

Browse source 
Since https://github.com/ooni/probe-cli/pull/527, if an experiment
returns an error, the corresponding measurement is not submitted since
the semantics of returning an error is that something fundamental
went wrong (e.g., we could not parse the input URL).

This diff ensures that all experiments only return and error when
something fundamental was wrong and return nil otherwise.

Reference issue: https://github.com/ooni/probe/issues/1808.
This commit is contained in:
Simone Basso 2022-01-07 13:17:20 +01:00 • committed by GitHub
commit 99ec7ffca9
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GPG key ID: 4AEE18F83AFDEB23
27 changed files with 132 additions and 66 deletions
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6
internal/engine/experiment/urlgetter/urlgetter.go
View file

@ -14,7 +14,7 @@ import (
const (
testName = "urlgetter"
testVersion = "0.1.0"
testVersion = "0.2.0"
)
// Config contains the experiment's configuration.
@ -109,9 +109,9 @@ func (m Measurer) Run(
Session: sess,
Target: string(measurement.Input),
}
tk, err := g.Get(ctx)
tk, _ := g.Get(ctx) // ignore error since we have the testkeys and we wanna submit them
measurement.TestKeys = &tk
return err
return nil
}
// NewExperimentMeasurer creates a new ExperimentMeasurer.

8
internal/engine/experiment/urlgetter/urlgetter_test.go
View file

@ -18,7 +18,7 @@ func TestMeasurer(t *testing.T) {
if m.ExperimentName() != "urlgetter" {
t.Fatal("invalid experiment name")
}
if m.ExperimentVersion() != "0.1.0" {
if m.ExperimentVersion() != "0.2.0" {
t.Fatal("invalid experiment version")
}
measurement := new(model.Measurement)
@ -27,7 +27,7 @@ func TestMeasurer(t *testing.T) {
ctx, &mockable.Session{},
measurement, model.NewPrinterCallbacks(log.Log),
)
if !errors.Is(err, context.Canceled) {
if !errors.Is(err, nil) { // nil because we want to submit the measurement
t.Fatal("not the error we expected")
}
if len(measurement.Extensions) != 6 {
@ -55,7 +55,7 @@ func TestMeasurerDNSCache(t *testing.T) {
if m.ExperimentName() != "urlgetter" {
t.Fatal("invalid experiment name")
}
if m.ExperimentVersion() != "0.1.0" {
if m.ExperimentVersion() != "0.2.0" {
t.Fatal("invalid experiment version")
}
measurement := new(model.Measurement)
@ -64,7 +64,7 @@ func TestMeasurerDNSCache(t *testing.T) {
ctx, &mockable.Session{},
measurement, model.NewPrinterCallbacks(log.Log),
)
if !errors.Is(err, context.Canceled) {
if !errors.Is(err, nil) { // nil because we want to submit the measurement
t.Fatal("not the error we expected")
}
if len(measurement.Extensions) != 6 {