Add code lens for running test in terminal

package.json

@@ -144,6 +144,11 @@
           "type": "boolean",
           "description": "Show signature help after confirming autocomplete",
           "default": true
+        },
+        "elixirLS.enableTestLenses": {
+          "type": "boolean",
+          "description": "Show code lenses to run tests in terminal",
+          "default": false
         }
       }
     },

src/commands/runTestFromCodeLens.ts

@@ -0,0 +1,39 @@
+import { window } from "vscode";
+
+type RunArgs = {
+  filePath: string,
+  describe: string | null,
+  testName?: string,
+  module?: string
+}
+
+export default function runFromCodeLens(args: RunArgs): void {
+  const elixirLsTerminal =
+    window.terminals.find(terminal => terminal.name == "ElixirLS") || window.createTerminal("ElixirLS");
+
+  elixirLsTerminal.show()
+  elixirLsTerminal.sendText('clear')
+  elixirLsTerminal.sendText(buildTestCommand(args));
+}
+
+function buildTestCommand(args: RunArgs): string {
+  const testFilter = buildTestInclude(args.describe, args.testName, args.module)
+
+  return `mix test --exclude test --include "${testFilter}" ${args.filePath}`
+}
+
+function buildTestInclude(describe: string | null, testName?: string, module?: string) {
+  if (module) {
+    return `module:${module}`
+  }
+
+  if (!testName) {
+    return `describe:${describe}`
+  }
+
+  if (describe) {
+    return `test:test ${describe} ${testName}`
+  }
+
+  return `test:test ${testName}`
+}

src/constants/commands.ts

@@ -0,0 +1,3 @@
+export default {
+  RUN_TEST_FROM_CODELENS: 'elixir.lens.test.run'
+}

src/extension.ts

@@ -17,6 +17,8 @@ import {
   ServerOptions,
 } from "vscode-languageclient";
 import * as os from "os";
+import Commands from "./constants/commands";
+import runFromCodeLens from "./commands/runTestFromCodeLens";
 
 export let defaultClient: LanguageClient;
 const clients: Map<string, LanguageClient> = new Map();
@@ -77,16 +79,16 @@ function sortedWorkspaceFolders(): string[] {
   if (_sortedWorkspaceFolders === void 0) {
     _sortedWorkspaceFolders = workspace.workspaceFolders
       ? workspace.workspaceFolders
-          .map((folder) => {
-            let result = folder.uri.toString();
-            if (result.charAt(result.length - 1) !== "/") {
-              result = result + "/";
-            }
-            return result;
-          })
-          .sort((a, b) => {
-            return a.length - b.length;
-          })
+        .map((folder) => {
+          let result = folder.uri.toString();
+          if (result.charAt(result.length - 1) !== "/") {
+            result = result + "/";
+          }
+          return result;
+        })
+        .sort((a, b) => {
+          return a.length - b.length;
+        })
       : [];
   }
   return _sortedWorkspaceFolders;
@@ -200,23 +202,28 @@ function configureTerminalLinkProvider(context: ExtensionContext) {
             if (!selection) {
               return;
             }
-  
+
             openUri(selection.uri, line);
           });
         }
       });
     }
   });
-  
+
   context.subscriptions.push(disposable);
 }
 
+function configureRunTestFromCodeLens() {
+  vscode.commands.registerCommand(Commands.RUN_TEST_FROM_CODELENS, runFromCodeLens);
+}
+
 export function activate(context: ExtensionContext): void {
   testElixir();
   detectConflictingExtension("mjmcloug.vscode-elixir");
   // https://github.com/elixir-lsp/vscode-elixir-ls/issues/34
   detectConflictingExtension("sammkj.vscode-elixir-formatter");
 
+  configureRunTestFromCodeLens()
   configureCopyDebugInfo(context);
   configureDebugger(context);
   configureTerminalLinkProvider(context);