JS: Add test

Author: asgerf

javascript/ql/test/library-tests/PathResolution/BaseUrl/base/lib/file.ts

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+export const x = "file.ts"

javascript/ql/test/library-tests/PathResolution/BaseUrl/base/lib/index.ts

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+export const x = "index.ts";

javascript/ql/test/library-tests/PathResolution/BaseUrl/base/lib/nostar.ts

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+export const x = "nostar.ts"

javascript/ql/test/library-tests/PathResolution/BaseUrl/base/lib2/file.ts

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+export const x = 1;

javascript/ql/test/library-tests/PathResolution/BaseUrl/src/main.ts

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+// Relative import
+import "../base/lib/file"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "../base/lib/file.ts"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "../base/lib/file.js"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "../base/lib"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "../base/lib/index"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "../base/lib/index.ts"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "../base/lib/index.js"; // $ importTarget=BaseUrl/base/lib/index.ts
+
+// Import relative to baseUrl
+import "lib/file"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "lib/file.ts"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "lib/file.js"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "lib"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "lib/index"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "lib/index.ts"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "lib/index.js"; // $ importTarget=BaseUrl/base/lib/index.ts
+
+// Import matching "@/*" path mapping
+import "@/file"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "@/file.ts"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "@/file.js"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "@"; // $ importTarget=BaseUrl/base/lib/nostar.ts
+import "@/index"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "@/index.ts"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "@/index.js"; // $ importTarget=BaseUrl/base/lib/index.ts
+
+// Import matching "#/*" path mapping
+import "#/file"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "#/file.ts"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "#/file.js"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "#/index"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "#/index.ts"; // $ importTarget=BaseUrl/base/lib/index.ts
+import "#/index.js"; // $ importTarget=BaseUrl/base/lib/index.ts
+
+// Import matching "^lib*" path mapping
+import "^lib/file"; // $ importTarget=BaseUrl/base/lib/file.ts
+import "^lib2/file"; // $ importTarget=BaseUrl/base/lib2/file.ts
+
+// Import matching "@/*.xyz" path mapping. Note that this is not actually supported by TypeScript.
+import "@/file.xyz";
+import "@/file.ts.xyz";
+import "@/file.js.xyz";
+import "@.xyz";
+import "@/index.xyz";
+import "@/index.ts.xyz";
+import "@/index.js.xyz";

javascript/ql/test/library-tests/PathResolution/BaseUrl/tsconfig.json

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+{
+    "include": ["."],
+    "compilerOptions": {
+        // Path mappings are resolved relative to baseUrl
+        "baseUrl": "./base",
+        "paths": {
+            "@/*": ["lib/*"],
+            "#/*": ["./lib/*"], // relative paths here are also resolved from the base url
+            "^lib*": ["./lib*"], // must end with "*" but not necessarily "/*"
+            "@/*.xyz": ["lib/*"],
+            "@": ["lib/nostar.ts"]
+        }
+    }
+}

javascript/ql/test/library-tests/PathResolution/Basic/Subdir/sub.ts

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+import '..'; // $ importTarget=Basic/index.ts
+import '../'; // $ importTarget=Basic/index.ts
+import './..'; // $ importTarget=Basic/index.ts
+import './../'; // $ importTarget=Basic/index.ts

javascript/ql/test/library-tests/PathResolution/Basic/index.ts

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+import './Subdir/sub'; // $ importTarget=Basic/Subdir/sub.ts

javascript/ql/test/library-tests/PathResolution/DeclarationFiles/lib/split.d.ts

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+// Type declaration for dual-module
+export interface DualType {
+    prop: string;
+}
+export declare function helper(): DualType;

javascript/ql/test/library-tests/PathResolution/DeclarationFiles/lib/split.js

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+// Implementation of dual-module
+export function helper() {
+  return { prop: "implementation" };
+}