vendor tsgo

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

@@ -0,0 +1,55 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/core"
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	. "github.com/microsoft/typescript-go/internal/fourslash/tests/util"
+	"github.com/microsoft/typescript-go/internal/ls"
+	"github.com/microsoft/typescript-go/internal/ls/lsutil"
+	"github.com/microsoft/typescript-go/internal/lsp/lsproto"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+// Test that global keywords like `function`, `class`, and `const` shadow
+// auto-import completions with the same name, rather than being
+// shadowed by them. See: https://github.com/microsoft/typescript-go/issues/1379
+func TestKeywordShadowsAutoImport(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	const content = `
+// @Filename: /mod.ts
+const value = 1;
+export { value as function }
+
+// @Filename: /index.ts
+function/**/
+`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	// The keyword `function` should appear, and the auto-import `function` from ./mod should NOT.
+	// Includes consumes the keyword match; Excludes then verifies no auto-import `function` remains.
+	f.VerifyCompletions(t, "", &fourslash.CompletionsExpectedList{
+		UserPreferences: &lsutil.UserPreferences{
+			IncludeCompletionsForModuleExports:    core.TSTrue,
+			IncludeCompletionsForImportStatements: core.TSTrue,
+		},
+		IsIncomplete: false,
+		ItemDefaults: &fourslash.CompletionsExpectedItemDefaults{
+			CommitCharacters: &DefaultCommitCharacters,
+			EditRange:        Ignored,
+		},
+		Items: &fourslash.CompletionsExpectedItems{
+			Includes: []fourslash.CompletionsExpectedItem{
+				&lsproto.CompletionItem{
+					Label:    "function",
+					Kind:     new(lsproto.CompletionItemKindKeyword),
+					SortText: new(string(ls.SortTextGlobalsOrKeywords)),
+				},
+			},
+			// After Includes consumes the keyword entry, no other `function` item should remain.
+			Excludes: []string{"function"},
+		},
+	})
+}