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[WIP] Add InterruptedIterations metric #1769

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[WIP] Add InterruptedIterations metric #1769

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4448bbf
Add InterruptedIterations metric
Dec 7, 2020
e2b88ab
Add hack to avoid emitting 0 value for metric
Dec 14, 2020
645261a
Align MiniRunner state handling with js.Runner
Dec 14, 2020
355ee1c
Add metrics emission tests for InterruptedIterations
Dec 14, 2020
82dae16
Treat errors from Throw() as plain goja values
Dec 14, 2020
ebd2d34
WIP Disable emitting InterruptedIterations on done context
Dec 14, 2020
9b47ec8
Avoid cloning tags on each iteration
Dec 15, 2020
b0b06c9
Enable metric pushing when run context is done
Dec 15, 2020
c12f449
Fix context usage in some tests, add metrics processing delay
Dec 15, 2020
d52efc4
Refactor VU error handling
Dec 22, 2020
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13 changes: 10 additions & 3 deletions api/v1/status_routes_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -103,10 +103,17 @@ func TestPatchStatus(t *testing.T) {
require.NoError(t, err)
engine, err := core.NewEngine(execScheduler, options, logger)
require.NoError(t, err)
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
defer cancel()
run, _, err := engine.Init(ctx, ctx)
globalCtx, globalCancel := context.WithTimeout(context.Background(), 2*time.Second)
runCtx, runCancel := context.WithCancel(globalCtx)
run, waitFn, err := engine.Init(globalCtx, runCtx)
require.NoError(t, err)
defer func() {
runCancel()
// Wait for metrics processing to finish
time.Sleep(100 * time.Millisecond)
globalCancel()
waitFn()
}()

go func() { _ = run() }()
// wait for the executor to initialize to avoid a potential data race below
Expand Down
8 changes: 8 additions & 0 deletions core/engine.go
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Expand Up @@ -288,6 +288,14 @@ func (e *Engine) processMetrics(globalCtx context.Context, processMetricsAfterRu
if !e.NoThresholds {
e.processThresholds()
}
if iim, ok := e.Metrics[metrics.InterruptedIterations.Name]; ok {
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This map lookup is racy according to the current TestSentReceivedMetrics failure. So I guess we'll need to rethink or abandon this hack...

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I am pretty sure this breaks any output as you are only emitting the 1 to them ...

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I guess it depends on how this metric is agreggated. If their system allows it they could factor it in with the iterations metric and get a percentage that way, which is kind of what we're doing here for the summary.

It makes no sense to me to emit the 0 value of this metric considering it's equivalent to iterations, and it would add a considerable amount of output data and affect the performance. A 5s/5VU test with an empty default and no sleep does 2115298 iterations on my machine and generates a 1.5 GB JSON file when emitting the 0 value. The same test without it manages to do 3203002 iterations and generate a 1.9 GB JSON file, but this is because it's doing ~50% more iterations.

Considering we already have complaints about outputting too much data and interest in #1321, I think we should rather work on #1321 before we consider adding another default metric.

Though we should probably rethink duplicating iterations...

How about instead of a new metric, we simply reused iterations and added an interrupted: "<cause>" tag to it? If the tag is omitted it's a complete iteration and if it's set then it was interrupted with the specific cause. WYT?

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I agree with prioritizing #1321, but that will actually probably require quite the refactoring, IMO even for an MVP.
The reusage of the iterations was discussed (I think) and we decided against it based on the fact the primary usage for this will be to check that a percentage of the iterations aren't actually interrupted, which with the current thresholds isn't possible if the metric isn't rate... so :(.

I think that maybe we should just make another PR with the changes that are in this PR (the test fixes and the lib.Exception) and merge that to both have them and make this PR easier to rebase and then work on #1321 so we can merge this then.

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The reusage of the iterations was discussed (I think) and we decided against it based on the fact the primary usage for this will be to check that a percentage of the iterations aren't actually interrupted, which with the current thresholds isn't possible if the metric isn't rate

Then maybe that should be a feature? I'll see what I can do.

if sink, ok := iim.Sink.(*stats.RateSink); ok {
// HACK: This is done to avoid emitting a 0 value for this
// metric on each iteration but still get a correct
// calculation in the summary.
sink.Total += int64(e.executionState.GetFullIterationCount())
}
}
processMetricsAfterRun <- struct{}{}

case sc := <-e.Samples:
Expand Down
24 changes: 15 additions & 9 deletions core/engine_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -88,6 +88,8 @@ func newTestEngine( //nolint:golint
if runCancel != nil {
runCancel()
}
// Wait for metrics processing to finish
time.Sleep(100 * time.Millisecond)
globalCancel()
waitFn()
}
Expand Down Expand Up @@ -791,21 +793,24 @@ func TestMetricsEmission(t *testing.T) {
}

testCases := []struct {
method string
minIterDuration string
defaultBody string
expCount, expIters float64
method string
minIterDuration string
defaultBody string
expCount, expIters, expInterrupted float64
}{
// Since emission of Iterations happens before the minIterationDuration
// sleep is done, we expect to receive metrics for all executions of
// the `default` function, despite of the lower overall duration setting.
{"minIterationDuration", `"300ms"`, "testCounter.add(1);", 16.0, 16.0},
{"minIterationDuration", `"300ms"`, "testCounter.add(1);", 16.0, 16.0, 4.0},
// With the manual sleep method and no minIterationDuration, the last
// `default` execution will be cutoff by the duration setting, so only
// 3 sets of metrics are expected.
{"sleepBeforeCounterAdd", "null", "sleep(0.3); testCounter.add(1); ", 12.0, 12.0},
// The counter should be sent, but the last iteration will be incomplete
{"sleepAfterCounterAdd", "null", "testCounter.add(1); sleep(0.3); ", 16.0, 12.0},
{"sleepBeforeCounterAdd", "null", "sleep(0.3); testCounter.add(1); ", 12.0, 12.0, 4.0},
// The counter should be sent, but the last iteration will be incomplete.
{"sleepAfterCounterAdd", "null", "testCounter.add(1); sleep(0.3); ", 16.0, 12.0, 4.0},
// All iterations should fail, but only 12 will be counted as complete.
{"fail", "null", "sleep(0.3); fail('test'); ", 0, 12.0, 16.0},
{"throw", "null", "sleep(0.3); throw 'test'; ", 0, 12.0, 16.0},
}

for _, tc := range testCases {
Expand All @@ -817,7 +822,7 @@ func TestMetricsEmission(t *testing.T) {
runner, err := js.New(
testutils.NewLogger(t),
&loader.SourceData{URL: &url.URL{Path: "/script.js"}, Data: []byte(fmt.Sprintf(`
import { sleep } from "k6";
import { fail, sleep } from "k6";
import { Counter } from "k6/metrics";

let testCounter = new Counter("testcounter");
Expand Down Expand Up @@ -860,6 +865,7 @@ func TestMetricsEmission(t *testing.T) {

assert.Equal(t, tc.expIters, getMetricSum(collector, metrics.Iterations.Name))
assert.Equal(t, tc.expCount, getMetricSum(collector, "testcounter"))
assert.Equal(t, tc.expInterrupted, getMetricSum(collector, metrics.InterruptedIterations.Name))
})
}
}
Expand Down
36 changes: 18 additions & 18 deletions js/common/bridge_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -348,7 +348,7 @@ func TestBind(t *testing.T) {
}},
{"Error", bridgeTestErrorType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.error()`)
assert.Contains(t, err.Error(), "GoError: error")
assert.Contains(t, err.Error(), "error")
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I think this can be moved to another PR that we can merge today and make this ... more focused ;)

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Sure, will do.

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See #1775.

}},
{"JSValue", bridgeTestJSValueType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
v, err := RunString(rt, `obj.func(1234)`)
Expand All @@ -358,7 +358,7 @@ func TestBind(t *testing.T) {
}},
{"JSValueError", bridgeTestJSValueErrorType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.func()`)
assert.Contains(t, err.Error(), "GoError: missing argument")
assert.Contains(t, err.Error(), "missing argument")

t.Run("Valid", func(t *testing.T) {
v, err := RunString(rt, `obj.func(1234)`)
Expand All @@ -369,7 +369,7 @@ func TestBind(t *testing.T) {
}},
{"JSValueContext", bridgeTestJSValueContextType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.func()`)
assert.Contains(t, err.Error(), "GoError: func() can only be called from within default()")
assert.Contains(t, err.Error(), "func() can only be called from within default()")

t.Run("Context", func(t *testing.T) {
*ctxPtr = context.Background()
Expand All @@ -383,14 +383,14 @@ func TestBind(t *testing.T) {
}},
{"JSValueContextError", bridgeTestJSValueContextErrorType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.func()`)
assert.Contains(t, err.Error(), "GoError: func() can only be called from within default()")
assert.Contains(t, err.Error(), "func() can only be called from within default()")

t.Run("Context", func(t *testing.T) {
*ctxPtr = context.Background()
defer func() { *ctxPtr = nil }()

_, err := RunString(rt, `obj.func()`)
assert.Contains(t, err.Error(), "GoError: missing argument")
assert.Contains(t, err.Error(), "missing argument")

t.Run("Valid", func(t *testing.T) {
v, err := RunString(rt, `obj.func(1234)`)
Expand All @@ -408,7 +408,7 @@ func TestBind(t *testing.T) {
}},
{"NativeFunctionError", bridgeTestNativeFunctionErrorType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.func()`)
assert.Contains(t, err.Error(), "GoError: missing argument")
assert.Contains(t, err.Error(), "missing argument")

t.Run("Valid", func(t *testing.T) {
v, err := RunString(rt, `obj.func(1234)`)
Expand All @@ -419,7 +419,7 @@ func TestBind(t *testing.T) {
}},
{"NativeFunctionContext", bridgeTestNativeFunctionContextType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.func()`)
assert.Contains(t, err.Error(), "GoError: func() can only be called from within default()")
assert.Contains(t, err.Error(), "func() can only be called from within default()")

t.Run("Context", func(t *testing.T) {
*ctxPtr = context.Background()
Expand All @@ -433,14 +433,14 @@ func TestBind(t *testing.T) {
}},
{"NativeFunctionContextError", bridgeTestNativeFunctionContextErrorType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.func()`)
assert.Contains(t, err.Error(), "GoError: func() can only be called from within default()")
assert.Contains(t, err.Error(), "func() can only be called from within default()")

t.Run("Context", func(t *testing.T) {
*ctxPtr = context.Background()
defer func() { *ctxPtr = nil }()

_, err := RunString(rt, `obj.func()`)
assert.Contains(t, err.Error(), "GoError: missing argument")
assert.Contains(t, err.Error(), "missing argument")

t.Run("Valid", func(t *testing.T) {
v, err := RunString(rt, `obj.func(1234)`)
Expand All @@ -464,7 +464,7 @@ func TestBind(t *testing.T) {

t.Run("Negative", func(t *testing.T) {
_, err := RunString(rt, `obj.addWithError(0, -1)`)
assert.Contains(t, err.Error(), "GoError: answer is negative")
assert.Contains(t, err.Error(), "answer is negative")
})
}},
{"AddWithError", bridgeTestAddWithErrorType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
Expand All @@ -475,12 +475,12 @@ func TestBind(t *testing.T) {

t.Run("Negative", func(t *testing.T) {
_, err := RunString(rt, `obj.addWithError(0, -1)`)
assert.Contains(t, err.Error(), "GoError: answer is negative")
assert.Contains(t, err.Error(), "answer is negative")
})
}},
{"Context", bridgeTestContextType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.context()`)
assert.Contains(t, err.Error(), "GoError: context() can only be called from within default()")
assert.Contains(t, err.Error(), "context() can only be called from within default()")

t.Run("Valid", func(t *testing.T) {
*ctxPtr = context.Background()
Expand All @@ -492,7 +492,7 @@ func TestBind(t *testing.T) {
}},
{"ContextAdd", bridgeTestContextAddType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.contextAdd(1, 2)`)
assert.Contains(t, err.Error(), "GoError: contextAdd() can only be called from within default()")
assert.Contains(t, err.Error(), "contextAdd() can only be called from within default()")

t.Run("Valid", func(t *testing.T) {
*ctxPtr = context.Background()
Expand All @@ -506,7 +506,7 @@ func TestBind(t *testing.T) {
}},
{"ContextAddWithError", bridgeTestContextAddWithErrorType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.contextAddWithError(1, 2)`)
assert.Contains(t, err.Error(), "GoError: contextAddWithError() can only be called from within default()")
assert.Contains(t, err.Error(), "contextAddWithError() can only be called from within default()")

t.Run("Valid", func(t *testing.T) {
*ctxPtr = context.Background()
Expand All @@ -519,7 +519,7 @@ func TestBind(t *testing.T) {

t.Run("Negative", func(t *testing.T) {
_, err := RunString(rt, `obj.contextAddWithError(0, -1)`)
assert.Contains(t, err.Error(), "GoError: answer is negative")
assert.Contains(t, err.Error(), "answer is negative")
})
})
}},
Expand All @@ -529,7 +529,7 @@ func TestBind(t *testing.T) {
case bridgeTestContextInjectType:
assert.EqualError(t, err, "TypeError: Object has no member 'contextInject' at <eval>:1:18(3)")
case *bridgeTestContextInjectType:
assert.Contains(t, err.Error(), "GoError: contextInject() can only be called from within default()")
assert.Contains(t, err.Error(), "contextInject() can only be called from within default()")
assert.Equal(t, nil, impl.ctx)

t.Run("Valid", func(t *testing.T) {
Expand Down Expand Up @@ -588,7 +588,7 @@ func TestBind(t *testing.T) {
}},
{"SumWithContext", bridgeTestSumWithContextType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.sumWithContext(1, 2)`)
assert.Contains(t, err.Error(), "GoError: sumWithContext() can only be called from within default()")
assert.Contains(t, err.Error(), "sumWithContext() can only be called from within default()")

t.Run("Valid", func(t *testing.T) {
*ctxPtr = context.Background()
Expand Down Expand Up @@ -626,7 +626,7 @@ func TestBind(t *testing.T) {
}},
{"SumWithContextAndError", bridgeTestSumWithContextAndErrorType{}, func(t *testing.T, obj interface{}, rt *goja.Runtime) {
_, err := RunString(rt, `obj.sumWithContextAndError(1, 2)`)
assert.Contains(t, err.Error(), "GoError: sumWithContextAndError() can only be called from within default()")
assert.Contains(t, err.Error(), "sumWithContextAndError() can only be called from within default()")

t.Run("Valid", func(t *testing.T) {
*ctxPtr = context.Background()
Expand Down
2 changes: 1 addition & 1 deletion js/common/util.go
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Expand Up @@ -34,5 +34,5 @@ func Throw(rt *goja.Runtime, err error) {
if e, ok := err.(*goja.Exception); ok {
panic(e)
}
panic(rt.NewGoError(err))
panic(rt.ToValue(err))
}
4 changes: 2 additions & 2 deletions js/common/util_test.go
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Expand Up @@ -33,12 +33,12 @@ func TestThrow(t *testing.T) {
fn1, ok := goja.AssertFunction(rt.ToValue(func() { Throw(rt, errors.New("aaaa")) }))
if assert.True(t, ok, "fn1 is invalid") {
_, err := fn1(goja.Undefined())
assert.EqualError(t, err, "GoError: aaaa")
assert.EqualError(t, err, "aaaa")

fn2, ok := goja.AssertFunction(rt.ToValue(func() { Throw(rt, err) }))
if assert.True(t, ok, "fn1 is invalid") {
_, err := fn2(goja.Undefined())
assert.EqualError(t, err, "GoError: aaaa")
assert.EqualError(t, err, "aaaa")
}
}
}
6 changes: 3 additions & 3 deletions js/initcontext_test.go
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Expand Up @@ -52,7 +52,7 @@ func TestInitContextRequire(t *testing.T) {
t.Run("Modules", func(t *testing.T) {
t.Run("Nonexistent", func(t *testing.T) {
_, err := getSimpleBundle(t, "/script.js", `import "k6/NONEXISTENT";`)
assert.Contains(t, err.Error(), "GoError: unknown module: k6/NONEXISTENT")
assert.Contains(t, err.Error(), "unknown module: k6/NONEXISTENT")
})

t.Run("k6", func(t *testing.T) {
Expand Down Expand Up @@ -317,15 +317,15 @@ func TestInitContextOpen(t *testing.T) {
t.Run("Nonexistent", func(t *testing.T) {
path := filepath.FromSlash("/nonexistent.txt")
_, err := getSimpleBundle(t, "/script.js", `open("/nonexistent.txt"); export default function() {}`)
assert.Contains(t, err.Error(), fmt.Sprintf("GoError: open %s: file does not exist", path))
assert.Contains(t, err.Error(), fmt.Sprintf("open %s: file does not exist", path))
})

t.Run("Directory", func(t *testing.T) {
path := filepath.FromSlash("/some/dir")
fs := afero.NewMemMapFs()
assert.NoError(t, fs.MkdirAll(path, 0o755))
_, err := getSimpleBundle(t, "/script.js", `open("/some/dir"); export default function() {}`, fs)
assert.Contains(t, err.Error(), fmt.Sprintf("GoError: open() can't be used with directories, path: %q", path))
assert.Contains(t, err.Error(), fmt.Sprintf("open() can't be used with directories, path: %q", path))
})
}

Expand Down
6 changes: 3 additions & 3 deletions js/modules/k6/crypto/crypto_test.go
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Expand Up @@ -316,7 +316,7 @@ func TestOutputEncoding(t *testing.T) {
hasher.update("hello world");
hasher.digest("someInvalidEncoding");
`)
assert.Contains(t, err.Error(), "GoError: Invalid output encoding: someInvalidEncoding")
assert.Contains(t, err.Error(), "Invalid output encoding: someInvalidEncoding")
})
}

Expand Down Expand Up @@ -395,7 +395,7 @@ func TestHMac(t *testing.T) {
throw new Error("Hex encoding mismatch: " + resultHex);
}`)

assert.Contains(t, err.Error(), "GoError: Invalid algorithm: "+algorithm)
assert.Contains(t, err.Error(), "Invalid algorithm: "+algorithm)
})

t.Run(algorithm+" wrapper: invalid", func(t *testing.T) {
Expand All @@ -405,7 +405,7 @@ func TestHMac(t *testing.T) {
throw new Error("Hex encoding mismatch: " + resultHex);
}`)

assert.Contains(t, err.Error(), "GoError: Invalid algorithm: "+algorithm)
assert.Contains(t, err.Error(), "Invalid algorithm: "+algorithm)
})
}
}
Expand Down
4 changes: 2 additions & 2 deletions js/modules/k6/crypto/x509/x509_test.go
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Expand Up @@ -150,7 +150,7 @@ func TestParse(t *testing.T) {
_, err := common.RunString(rt, `
x509.parse("bad-certificate");`)
assert.Contains(
t, err.Error(), "GoError: failed to decode certificate PEM file")
t, err.Error(), "failed to decode certificate PEM file")
})

t.Run("ParseFailure", func(t *testing.T) {
Expand All @@ -160,7 +160,7 @@ func TestParse(t *testing.T) {
if assert.Error(t, err) {
assert.Contains(t,
err.Error(),
"GoError: failed to parse certificate",
"failed to parse certificate",
)
}
})
Expand Down
8 changes: 4 additions & 4 deletions js/modules/k6/http/response_test.go
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Expand Up @@ -198,13 +198,13 @@ func TestResponse(t *testing.T) {
t.Run("Invalid", func(t *testing.T) {
_, err := common.RunString(rt, sr(`http.request("GET", "HTTPBIN_URL/html").json();`))
//nolint:lll
assert.Contains(t, err.Error(), "GoError: cannot parse json due to an error at line 1, character 2 , error: invalid character '<' looking for beginning of value")
assert.Contains(t, err.Error(), "cannot parse json due to an error at line 1, character 2 , error: invalid character '<' looking for beginning of value")
})

t.Run("Invalid", func(t *testing.T) {
_, err := common.RunString(rt, sr(`http.request("GET", "HTTPBIN_URL/invalidjson").json();`))
//nolint:lll
assert.Contains(t, err.Error(), "GoError: cannot parse json due to an error at line 3, character 9 , error: invalid character 'e' in literal true (expecting 'r')")
assert.Contains(t, err.Error(), "cannot parse json due to an error at line 3, character 9 , error: invalid character 'e' in literal true (expecting 'r')")
})
})
t.Run("JsonSelector", func(t *testing.T) {
Expand Down Expand Up @@ -327,7 +327,7 @@ func TestResponse(t *testing.T) {
if (res.status != 200) { throw new Error("wrong status: " + res.status); }
res.submitForm({ formSelector: "#doesNotExist" })
`))
assert.Contains(t, err.Error(), sr("GoError: no form found for selector '#doesNotExist' in response 'HTTPBIN_URL/forms/post'"))
assert.Contains(t, err.Error(), sr("no form found for selector '#doesNotExist' in response 'HTTPBIN_URL/forms/post'"))
})

t.Run("withGetMethod", func(t *testing.T) {
Expand Down Expand Up @@ -378,7 +378,7 @@ func TestResponse(t *testing.T) {
if (res.status != 200) { throw new Error("wrong status: " + res.status); }
res = res.clickLink({ selector: 'a#doesNotExist' })
`))
assert.Contains(t, err.Error(), sr("GoError: no element found for selector 'a#doesNotExist' in response 'HTTPBIN_URL/links/10/0'"))
assert.Contains(t, err.Error(), sr("no element found for selector 'a#doesNotExist' in response 'HTTPBIN_URL/links/10/0'"))
})

t.Run("withRequestParams", func(t *testing.T) {
Expand Down
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