Adds strict to the playground defaults and some test tweasks

Author: orta

packages/sandbox/src/compilerOptions.ts

@@ -10,6 +10,8 @@ type Monaco = typeof import("monaco-editor")
 export function getDefaultSandboxCompilerOptions(config: SandboxConfig, monaco: Monaco) {
   const useJavaScript = config.filetype === "js"
   const settings: CompilerOptions = {
+    strict: true,
+
     noImplicitAny: true,
     strictNullChecks: !useJavaScript,
     strictFunctionTypes: true,

packages/sandbox/test/defaultCompilerOptions.test.ts

@@ -26,15 +26,13 @@ describe(getCompilerOptionsFromParams, () => {
   })
 
   it("ignores non-compiler flags", () => {
-    // noImplicitReturns=true is the default, and shouldnt be in the object
     const params = new URLSearchParams("?asdasdasdasd=false")
     const defaults = getDefaultSandboxCompilerOptions({ filetype: "js" } as any, fauxMonaco)
 
     expect(getCompilerOptionsFromParams(defaults, ts, params)).toMatchInlineSnapshot(`Object {}`)
   })
 
-  it("hanndles mapped types like target et", () => {
-    // noImplicitReturns=true is the default, and shouldnt be in the object
+  it("handles mapped types like target et", () => {
     const params = new URLSearchParams("?target=6")
     const defaults = getDefaultSandboxCompilerOptions({ filetype: "js" } as any, fauxMonaco)