JS: Add test for import of d.ts file

Author: asgerf

javascript/ql/test/library-tests/TypeScript/RegressionTests/ImportDtsFile/has-javascript-file.d.ts

@@ -0,0 +1,3 @@
+// This file has a corresponding .js file, which will be preferred by import resolution.
+
+export const x: number;

javascript/ql/test/library-tests/TypeScript/RegressionTests/ImportDtsFile/has-javascript-file.js

@@ -0,0 +1 @@
+export const x = 42;

javascript/ql/test/library-tests/TypeScript/RegressionTests/ImportDtsFile/main.ts

@@ -0,0 +1,5 @@
+import * as declFile from "./only-declaration-file";
+import * as jsFile from "./has-javascript-file";
+
+console.log(declFile.x);
+console.log(jsFile.x);

javascript/ql/test/library-tests/TypeScript/RegressionTests/ImportDtsFile/only-declaration-file.d.ts

@@ -0,0 +1,3 @@
+// This file has no corresponding implementation, so it should be seen by import resolution.
+
+export const x: number;

javascript/ql/test/library-tests/TypeScript/RegressionTests/ImportDtsFile/test.expected

@@ -0,0 +1 @@
+| main.ts:2:1:2:48 | import  ... -file"; | ./has-javascript-file | has-javascript-file.js:1:1:2:0 | <toplevel> |

javascript/ql/test/library-tests/TypeScript/RegressionTests/ImportDtsFile/test.ql

@@ -0,0 +1,4 @@
+import javascript
+
+from Import imprt
+select imprt, imprt.getImportedPath().getValue(), imprt.getImportedModule()