vendor tsgo

tools/tsgo/internal/fourslash/tests/signatureHelpNestedCalls_test.go

@@ -0,0 +1,55 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+func TestSignatureHelpNestedCalls(t *testing.T) {
+	t.Parallel()
+
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	const content = `function foo(s: string) { return s; }
+function bar(s: string) { return s; }
+let s = foo(/*a*/ /*b*/bar/*c*/(/*d*/"hello"/*e*/)/*f*/);`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+
+	// Markers a, b, c should show foo (outer call)
+	f.GoToMarker(t, "a")
+	f.VerifySignatureHelp(t, fourslash.VerifySignatureHelpOptions{Text: "foo(s: string): string"})
+
+	f.GoToMarker(t, "b")
+	f.VerifySignatureHelp(t, fourslash.VerifySignatureHelpOptions{Text: "foo(s: string): string"})
+
+	f.GoToMarker(t, "c")
+	f.VerifySignatureHelp(t, fourslash.VerifySignatureHelpOptions{Text: "foo(s: string): string"})
+
+	// Markers d, e should show bar (inside inner call, including the end boundary)
+	f.GoToMarker(t, "d")
+	f.VerifySignatureHelp(t, fourslash.VerifySignatureHelpOptions{Text: "bar(s: string): string"})
+
+	f.GoToMarker(t, "e")
+	f.VerifySignatureHelp(t, fourslash.VerifySignatureHelpOptions{Text: "bar(s: string): string"})
+
+	// Marker f should show foo (after the inner call closes)
+	f.GoToMarker(t, "f")
+	f.VerifySignatureHelp(t, fourslash.VerifySignatureHelpOptions{Text: "foo(s: string): string"})
+}
+
+func TestSignatureHelpEmptyInnerCall(t *testing.T) {
+	t.Parallel()
+
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	const content = `function foo(s: string) { return s; }
+function bar(s: string) { return s; }
+let s = foo(bar(/*a*/));`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+
+	// Marker a should show bar even though the inner argument list is empty.
+	f.GoToMarker(t, "a")
+	f.VerifySignatureHelp(t, fourslash.VerifySignatureHelpOptions{Text: "bar(s: string): string"})
+}