test: Add e2e spec for get definition

e2e/lang-server-specs/definition.js

@@ -0,0 +1,67 @@
+const assert = require('assert');
+const path = require('path');
+const { mark } = require('fretted-strings');
+
+function findResponse(responses, commandName) {
+  return responses.find(response => response.command === commandName);
+}
+
+async function run(server) {
+  const fileFragments = path.resolve(__dirname, '../../project-fixtures/simple-prj/fragments.ts');
+  const fileMain = path.resolve(__dirname, '../../project-fixtures/simple-prj/main.ts');
+  const frets = {};
+  const fileFragmentsContent = `
+    const fragment = gql\`
+      fragment MyFragment on Query {
+        hello
+      }
+    \`;
+  `;
+  const fileMainContent = mark(
+    `
+      const query = gql\`
+        query MyQuery {
+          ...MyFragment
+ %%%          ^           %%%
+ %%%          p           %%%
+        }
+      \`;
+    `,
+    frets,
+  );
+  server.send({
+    command: 'open',
+    arguments: { file: fileFragments, fileContent: fileFragmentsContent, scriptKindName: 'TS' },
+  });
+  server.send({ command: 'open', arguments: { file: fileMain, fileContent: fileMainContent, scriptKindName: 'TS' } });
+
+  await server.waitEvent('projectLoadingFinish');
+
+  server.send({
+    command: 'definition',
+    arguments: { file: fileMain, offset: frets.p.character + 1, line: frets.p.line + 1, prefix: '' },
+  });
+
+  await server.waitResponse('definition');
+
+  server.send({
+    command: 'definitionAndBoundSpan',
+    arguments: { file: fileMain, offset: frets.p.character + 1, line: frets.p.line + 1, prefix: '' },
+  });
+
+  await server.waitResponse('definitionAndBoundSpan');
+
+  await server.close();
+
+  const definitionResponse = findResponse(server.responses, 'definition');
+  assert(!!definitionResponse);
+  assert(definitionResponse.body.length === 1);
+  assert(definitionResponse.body[0].file === fileFragments);
+
+  const definitionAndBoundSpanResponse = findResponse(server.responses, 'definitionAndBoundSpan');
+  assert(!!definitionAndBoundSpanResponse);
+  assert(definitionAndBoundSpanResponse.body.definitions.length === 1);
+  assert(definitionAndBoundSpanResponse.body.definitions[0].file === fileFragments);
+}
+
+module.exports = run;