vendor tsgo

tools/tsgo/internal/checker/tracer_test.go

@@ -0,0 +1,69 @@
+package checker
+
+import (
+	"io/fs"
+	"testing"
+	"testing/fstest"
+
+	"github.com/microsoft/typescript-go/internal/json"
+	"github.com/microsoft/typescript-go/internal/tracing"
+	"github.com/microsoft/typescript-go/internal/vfs/vfstest"
+	"gotest.tools/v3/assert"
+)
+
+func TestTracerPushPreservesEndArgMutations(t *testing.T) {
+	t.Parallel()
+
+	fsys := vfstest.FromMap(fstest.MapFS{
+		"/trace": &fstest.MapFile{Mode: fs.ModeDir},
+	}, true)
+
+	tr, err := tracing.StartTracing(fsys, "/trace", "", true /*deterministic*/)
+	assert.NilError(t, err)
+
+	args := map[string]any{"id": 1}
+	tracer := NewTracer(tr, 7)
+	pop := tracer.Push(tracing.PhaseCheckTypes, "getVariancesWorker", args, true)
+	_, hasCheckerID := args["checkerId"]
+	assert.Assert(t, !hasCheckerID)
+
+	args["variances"] = []string{"out"}
+	pop()
+	_, hasCheckerID = args["checkerId"]
+	assert.Assert(t, !hasCheckerID)
+
+	assert.NilError(t, tr.StopTracing())
+
+	traceText, ok := fsys.ReadFile("/trace/trace.json")
+	assert.Assert(t, ok)
+
+	var events []testTraceEvent
+	assert.NilError(t, json.Unmarshal([]byte(traceText), &events))
+
+	beginEvent := findTestTraceEvent(t, events, "B", "getVariancesWorker")
+	assert.Equal(t, beginEvent.Args["checkerId"], float64(7))
+	assert.Equal(t, beginEvent.Args["variances"], nil)
+
+	endEvent := findTestTraceEvent(t, events, "E", "getVariancesWorker")
+	assert.Equal(t, endEvent.Args["checkerId"], float64(7))
+	variances, ok := endEvent.Args["variances"].([]any)
+	assert.Assert(t, ok)
+	assert.DeepEqual(t, variances, []any{"out"})
+}
+
+type testTraceEvent struct {
+	PH   string         `json:"ph"`
+	Name string         `json:"name"`
+	Args map[string]any `json:"args"`
+}
+
+func findTestTraceEvent(t *testing.T, events []testTraceEvent, phase string, name string) testTraceEvent {
+	t.Helper()
+	for _, event := range events {
+		if event.PH == phase && event.Name == name {
+			return event
+		}
+	}
+	t.Fatalf("failed to find %s event %q", phase, name)
+	return testTraceEvent{}
+}