perf(cli): options for isolated context

VM was created for each seprate test run, which caused performance issues. Now it's disabled by default. To get previous behaviour, which is rarely needed, run it with --isolatedContext.

packages/baset-cli/src/commands/test.ts

@@ -12,6 +12,7 @@ interface ITestArgs extends IGlobalArgs {
     bases: string;
     specs: string;
     reporter: string;
+    isolateContext: boolean;
 }
 
 const testCommand: CommandModule = {
@@ -37,11 +38,16 @@ const testCommand: CommandModule = {
             describe: 'TAP reporter to use, `false` for plain output',
             default: 'tap-diff',
         },
+        isolateContext: {
+            type: 'boolean',
+            describe: 'Run each test in isolated context. ATTENTION: this will slow down your tests',
+            default: false,
+        },
     },
     handler: async (argv: ITestArgs) => {
         let isSucceeded = true;
         const [allSpecs, allBaselines] = await Promise.all([glob(argv.specs), glob(argv.bases)]);
-        const tester = new Tester(argv.plugins, argv.options);
+        const tester = new Tester(argv.plugins, argv.options, argv.isolateContext);
         const specs = allSpecs.filter(filterNodeModules);
         const baselines = allBaselines.filter(filterNodeModules);
         let reporterIsSkipped: boolean;

packages/baset-cli/src/options/index.ts

@@ -12,6 +12,7 @@ export interface ITestGroupPlugins {
     readers?: string[] | string;
     resolvers?: string[] | string;
     imports?: string[] | string;
+    isolateContext?: boolean;
 }
 
 function groupPlugins(plugins: string[]): ITestGroupOptions {
@@ -31,6 +32,7 @@ function groupPlugins(plugins: string[]): ITestGroupOptions {
         readers,
         resolvers,
         imports,
+        isolateContext: false,
     };
 }
 function getDefaultPlugins(plugins: ITestGroupPlugins): ITestGroupOptions {
@@ -52,6 +54,7 @@ function getDefaultPlugins(plugins: ITestGroupPlugins): ITestGroupOptions {
                 ? plugins.imports
                 : [plugins.imports]
             : []).map(resolveModule),
+        isolateContext: !!plugins.isolateContext,
     };
 }
 function resolveModule<T extends string | undefined>(name: T) {