vendor tsgo

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

@@ -0,0 +1,213 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+func TestGoToSourceNodeModulesWithTypes(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	const content = `// @moduleResolution: bundler
+// @Filename: /home/src/workspaces/project/node_modules/foo/package.json
+{ "name": "foo", "version": "1.0.0", "main": "./lib/main.js", "types": "./types/main.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/foo/lib/main.js
+export const /*end*/a = "a";
+// @Filename: /home/src/workspaces/project/node_modules/foo/types/main.d.ts
+export declare const a: string;
+// @Filename: /home/src/workspaces/project/index.ts
+import { a } from "foo";
+[|a/*start*/|]`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "start")
+}
+
+func TestGoToSourceLocalJsBesideDts(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	const content = `// @Filename: /home/src/workspaces/project/a.js
+export const /*end*/a = "a";
+// @Filename: /home/src/workspaces/project/a.d.ts
+export declare const a: string;
+// @Filename: /home/src/workspaces/project/index.ts
+import { a } from [|"./a"/*moduleSpecifier*/|];
+[|a/*identifier*/|]`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "identifier", "moduleSpecifier")
+}
+
+func TestGoToSourceNonDeclarationFile(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// Declaration is in a .ts file (not .d.ts),
+	// so mapDeclarationToSourceDefinitions returns it as-is.
+	const content = `// @moduleResolution: bundler
+// @Filename: /home/src/workspaces/project/utils.ts
+export function /*target*/helper() { return 1; }
+// @Filename: /home/src/workspaces/project/index.ts
+import { helper } from "./utils";
+helper/*usage*/();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "usage")
+}
+
+func TestGoToSourceNoImplementationFile(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// No implementation file can be resolved (types-only package with no .js).
+	const content = `// @moduleResolution: bundler
+// @Filename: /home/src/workspaces/project/node_modules/pkg/package.json
+{ "name": "pkg", "types": "./index.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.d.ts
+export declare function typesOnly(): void;
+// @Filename: /home/src/workspaces/project/index.ts
+import { /*importName*/typesOnly } from "pkg";
+typesOnly/*callSite*/();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "importName", "callSite")
+}
+
+func TestGoToSourceDeclarationMapSourceMap(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// .d.ts has a sourcemap pointing back to the original .ts source.
+	const content = `// @moduleResolution: bundler
+// @Filename: /home/src/workspaces/project/node_modules/pkg/package.json
+{ "name": "pkg", "main": "./dist/index.js", "types": "./dist/index.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/src/index.ts
+export function /*target*/greet() { return "hi"; }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/dist/index.d.ts
+export declare function greet(): string;
+//# sourceMappingURL=index.d.ts.map
+// @Filename: /home/src/workspaces/project/node_modules/pkg/dist/index.d.ts.map
+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAAA,wBAAgB,KAAK,WAAY"}
+// @Filename: /home/src/workspaces/project/node_modules/pkg/dist/index.js
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.greet = greet;
+function greet() { return "hi"; }
+// @Filename: /home/src/workspaces/project/index.ts
+import { greet } from "pkg";
+greet/*usage*/();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "usage")
+}
+
+func TestGoToSourceDeclarationMapFallback(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// findClosestDeclarationNode walks up parents and finds no declaration,
+	// returns entry node. This happens when source map points to a position
+	// that's not inside any declaration.
+	const content = `// @moduleResolution: bundler
+// @Filename: /home/src/workspaces/project/node_modules/pkg/package.json
+{ "name": "pkg", "main": "./dist/index.js", "types": "./dist/index.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/src/index.ts
+/*target*/console.log("side effect");
+export function greet() { return "hi"; }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/dist/index.d.ts
+export declare function greet(): string;
+//# sourceMappingURL=index.d.ts.map
+// @Filename: /home/src/workspaces/project/node_modules/pkg/dist/index.d.ts.map
+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../src/index.ts"],"names":[],"mappings":"AAC6B"}
+// @Filename: /home/src/workspaces/project/node_modules/pkg/dist/index.js
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.greet = greet;
+console.log("side effect");
+function greet() { return "hi"; }
+// @Filename: /home/src/workspaces/project/index.ts
+import { greet } from "pkg";
+greet/*usage*/();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "usage")
+}
+
+func TestGoToSourceNamedExportsSpecifier(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	const content = `// @moduleResolution: bundler
+// @Filename: /home/src/workspaces/project/node_modules/pkg/package.json
+{ "name": "pkg", "main": "./index.js", "types": "./index.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.d.ts
+export declare function foo(): string;
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export function /*target*/foo() { return "ok"; }
+// @Filename: /home/src/workspaces/project/index.ts
+import { foo } from "pkg";
+const result = foo/*valueUsage*/();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "valueUsage")
+}
+
+func TestGoToSourceTripleSlashReference(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// Cursor on a /// <reference path="..."/> directive pointing to a .js file.
+	const content = `// @allowJs: true
+// @Filename: /home/src/workspaces/project/helper.js
+/*target*/function helper() { return 1; }
+// @Filename: /home/src/workspaces/project/index.ts
+/// <reference path="./[|helper.js/*refPath*/|]" />
+declare function helper(): number;
+helper();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "refPath")
+}
+
+func TestGoToSourceFallbackToModuleSpecifier(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// When the specific name can't be found in the .js implementation file
+	// (because the JS uses a different export pattern), the fallback returns
+	// the entry declaration of the .js file.
+	const content = `// @moduleResolution: bundler
+// @allowJs: true
+// @Filename: /home/src/workspaces/project/node_modules/pkg/package.json
+{ "name": "pkg", "main": "./index.js", "types": "./index.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.d.ts
+export declare function internalHelper(): void;
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+/*entryPoint*/Object.defineProperty(exports, "internalHelper", { value: function() {} });
+// @Filename: /home/src/workspaces/project/index.ts
+import { /*importName*/internalHelper } from "pkg";`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "importName")
+}
+
+func TestGoToSourceFilterPreferredFallbackAll(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// filterPreferredSourceDeclarations returns all declarations when none are
+	// property-like and none are concrete. This happens with re-export specifiers
+	// matching the name in the .js file.
+	const content = `// @moduleResolution: bundler
+// @allowJs: true
+// @Filename: /home/src/workspaces/project/node_modules/pkg/package.json
+{ "name": "pkg", "main": "./barrel.js", "types": "./barrel.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/barrel.d.ts
+export { value } from "./impl";
+// @Filename: /home/src/workspaces/project/node_modules/pkg/impl.d.ts
+export declare const value: number;
+// @Filename: /home/src/workspaces/project/node_modules/pkg/barrel.js
+export { value } from "./impl.js";
+// @Filename: /home/src/workspaces/project/node_modules/pkg/impl.js
+export const /*target*/value = 42;
+// @Filename: /home/src/workspaces/project/index.ts
+import { /*importName*/value } from "pkg";
+console.log(value);`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "importName")
+}