Embed integration test scripts and check for init console logs

This makes the tests easier to read and the init checks are important to test the current state, since that behavior will be changed in the next commit.

cmd/integration_test.go

@@ -29,16 +29,6 @@ import (
 	"go.k6.io/k6/lib/testutils/httpmultibin"
 )
 
-const (
-	noopDefaultFunc   = `export default function() {};`
-	fooLogDefaultFunc = `export default function() { console.log('foo'); };`
-	noopHandleSummary = `
-		export function handleSummary(data) {
-			return {}; // silence the end of test summary
-		};
-	`
-)
-
 func TestVersion(t *testing.T) {
 	t.Parallel()
 
@@ -62,7 +52,7 @@ func TestSimpleTestStdin(t *testing.T) {
 
 	ts := newGlobalTestState(t)
 	ts.args = []string{"k6", "run", "-"}
-	ts.stdIn = bytes.NewBufferString(noopDefaultFunc)
+	ts.stdIn = bytes.NewBufferString(`export default function() {};`)
 	newRootCommand(ts.globalState).execute()
 
 	stdOut := ts.stdOut.String()
@@ -77,7 +67,12 @@ func TestStdoutAndStderrAreEmptyWithQuietAndHandleSummary(t *testing.T) {
 
 	ts := newGlobalTestState(t)
 	ts.args = []string{"k6", "--quiet", "run", "-"}
-	ts.stdIn = bytes.NewBufferString(noopDefaultFunc + noopHandleSummary)
+	ts.stdIn = bytes.NewBufferString(`
+		export default function() {};
+		export function handleSummary(data) {
+			return {}; // silence the end of test summary
+		};
+	`)
 	newRootCommand(ts.globalState).execute()
 
 	assert.Empty(t, ts.stdErr.Bytes())
@@ -97,7 +92,10 @@ func TestStdoutAndStderrAreEmptyWithQuietAndLogsForwarded(t *testing.T) {
 		"k6", "--quiet", "--log-output", "file=" + logFilePath,
 		"--log-format", "raw", "run", "--no-summary", "-",
 	}
-	ts.stdIn = bytes.NewBufferString(fooLogDefaultFunc)
+	ts.stdIn = bytes.NewBufferString(`
+		console.log('init');
+		export default function() { console.log('foo'); };
+	`)
 	newRootCommand(ts.globalState).execute()
 
 	// The test state hook still catches this message
@@ -110,7 +108,7 @@ func TestStdoutAndStderrAreEmptyWithQuietAndLogsForwarded(t *testing.T) {
 	// Instead it should be in the log file
 	logContents, err := afero.ReadFile(ts.fs, logFilePath)
 	require.NoError(t, err)
-	assert.Equal(t, "foo\n", string(logContents))
+	assert.Equal(t, "init\ninit\ninit\nfoo\ninit\n", string(logContents)) //nolint:dupword
 }
 
 func TestRelativeLogPathWithSetupAndTeardown(t *testing.T) {
@@ -119,7 +117,9 @@ func TestRelativeLogPathWithSetupAndTeardown(t *testing.T) {
 	ts := newGlobalTestState(t)
 
 	ts.args = []string{"k6", "--log-output", "file=test.log", "--log-format", "raw", "run", "-i", "2", "-"}
-	ts.stdIn = bytes.NewBufferString(fooLogDefaultFunc + `
+	ts.stdIn = bytes.NewBufferString(`
+		console.log('init');
+		export default function() { console.log('foo'); };
 		export function setup() { console.log('bar'); };
 		export function teardown() { console.log('baz'); };
 	`)
@@ -134,15 +134,15 @@ func TestRelativeLogPathWithSetupAndTeardown(t *testing.T) {
 	// And check that the log file also contains everything
 	logContents, err := afero.ReadFile(ts.fs, filepath.Join(ts.cwd, "test.log"))
 	require.NoError(t, err)
-	assert.Equal(t, "bar\nfoo\nfoo\nbaz\n", string(logContents))
+	assert.Equal(t, "init\ninit\ninit\nbar\nfoo\nfoo\ninit\nbaz\ninit\n", string(logContents)) //nolint:dupword
 }
 
 func TestWrongCliFlagIterations(t *testing.T) {
 	t.Parallel()
 
 	ts := newGlobalTestState(t)
 	ts.args = []string{"k6", "run", "--iterations", "foo", "-"}
-	ts.stdIn = bytes.NewBufferString(noopDefaultFunc)
+	ts.stdIn = bytes.NewBufferString(`export default function() {};`)
 	// TODO: check for exitcodes.InvalidConfig after https://github.com/loadimpact/k6/issues/883 is done...
 	ts.expectedExitCode = -1
 	newRootCommand(ts.globalState).execute()
@@ -155,7 +155,7 @@ func TestWrongEnvVarIterations(t *testing.T) {
 	ts := newGlobalTestState(t)
 	ts.args = []string{"k6", "run", "--vus", "2", "-"}
 	ts.envVars = map[string]string{"K6_ITERATIONS": "4"}
-	ts.stdIn = bytes.NewBufferString(noopDefaultFunc)
+	ts.stdIn = bytes.NewBufferString(`export default function() {};`)
 
 	newRootCommand(ts.globalState).execute()