test: add test of completion provider

test/src/codeLenses.test.ts

@@ -16,7 +16,7 @@
 
 import * as assert from 'assert'
 import * as vscode from 'vscode'
-import { getTestDocUri, activate, open, copyFile, tryDeleteFile } from './util'
+import { getTestDocUri, activate, open } from './util'
 
 suite('Code lenses', () => {
   const mainDocUri = getTestDocUri('src/Main.flix')

test/src/completions.test.ts

@@ -0,0 +1,49 @@
+/*
+ * Copyright 2024 Holger Dal Mogensen
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import * as assert from 'assert'
+import * as vscode from 'vscode'
+import { getTestDocUri, activate, open, tryDeleteFile, addFile, typeText } from './util'
+
+suite('Code lenses', () => {
+  const docUri = getTestDocUri('src/Temp.flix')
+
+  suiteSetup(async () => {
+    await activate()
+  })
+  teardown(async () => {
+    await tryDeleteFile(docUri)
+  })
+
+  test('Should propose completing mod', async () => {
+    await addFile(docUri, '')
+    await open(docUri)
+    await typeText('mo')
+
+    // TODO: Figure out why this returns all possible keywords, which is not what is shown in the editor
+    const position = new vscode.Position(0, 2)
+    const r = (await vscode.commands.executeCommand(
+      'vscode.executeCompletionItemProvider',
+      docUri,
+      position,
+    )) as vscode.CompletionList
+
+    assert.strictEqual(
+      r.items.some(i => i.label === 'mod'),
+      true,
+    )
+  })
+})

test/src/util.ts

@@ -40,6 +40,13 @@ export async function open(docUri: vscode.Uri) {
   await vscode.window.showTextDocument(doc)
 }
 
+/**
+ * Types the given `text` in the editor at the current position.
+ */
+export async function typeText(text: string) {
+  await vscode.commands.executeCommand('type', { text })
+}
+
 function getTestDocPath(p: string) {
   return path.resolve(__dirname, '../testWorkspace', p)
 }