Tests for tsserver scenario

Author: sheetalkamat

src/testRunner/tsconfig.json

@@ -190,6 +190,7 @@
         "unittests/tsserver/openFile.ts",
         "unittests/tsserver/packageJsonInfo.ts",
         "unittests/tsserver/partialSemanticServer.ts",
+        "unittests/tsserver/persistResolutions.ts",
         "unittests/tsserver/plugins.ts",
         "unittests/tsserver/projectErrors.ts",
         "unittests/tsserver/projectReferenceCompileOnSave.ts",

src/testRunner/unittests/tsserver/helpers.ts

@@ -95,6 +95,19 @@ namespace ts.projectSystem {
         };
     }
 
+    export function createLoggerWithInMemoryLogs() {
+        const { logger, hasErrorMsg } = createHasErrorMessageLogger();
+        const logs: string[] = [];
+        logger.hasLevel = returnTrue;
+        logger.loggingEnabled = returnTrue;
+        logger.info = s => logs.push(s.replace(/Elapsed::?\s[0-9]+(?:\.\d+)?ms/g, "Elapsed:: *ms"));
+        return { logger, logs, hasErrorMsg };
+    }
+
+    export function baselineTsserverLogs(scenario: string, subScenario: string, baseline: string[]) {
+        Harness.Baseline.runBaseline(`tsserver/${scenario}/${subScenario.split(" ").join("-")}.js`, baseline.join("\r\n"));
+    }
+
     export class TestTypingsInstaller extends TI.TypingsInstaller implements server.ITypingsInstaller {
         protected projectService!: server.ProjectService;
         constructor(