feat(twoslash): configure whether to throw, tests

packages/twoslash/src/includes.ts

@@ -15,7 +15,7 @@ export function addIncludes(map: Map<string, string>, name: string, code: string
   map.set(name, lines.join('\n'))
 }
 
-export function replaceIncludesInCode(_map: Map<string, string>, code: string) {
+export function replaceIncludesInCode(_map: Map<string, string>, code: string, shouldThrow = true) {
   const includes = /\/\/ @include: (.*)$/gm
 
   // Basically run a regex over the code replacing any // @include: thing with
@@ -36,10 +36,12 @@ export function replaceIncludesInCode(_map: Map<string, string>, code: string) {
 
     if (!replaceWith) {
       const msg = `Could not find an include with the key: '${key}'.\nThere is: ${Array.from(_map.keys())}.`
-      throw new Error(msg)
+      if (shouldThrow)
+        throw new Error(msg)
+    }
+    else {
+      toReplace.push([match.index, match[0].length, replaceWith])
     }
-
-    toReplace.push([match.index, match[0].length, replaceWith])
   }
 
   let newCode = code.toString()

packages/twoslash/test/includes.test.ts

@@ -56,6 +56,20 @@ it('replaces the code', () => {
   `)
 })
 
+it('throws an error if key not found', () => {
+  const map = new Map()
+
+  const sample = `// @include: main`
+  expect(() => replaceIncludesInCode(map, sample)).toThrow()
+})
+
+it('does not throw an error if key not found but shouldThrow is false', () => {
+  const map = new Map()
+
+  const sample = `// @include: main`
+  expect(() => replaceIncludesInCode(map, sample, false)).not.toThrow()
+})
+
 it('replaces @include directives with previously transformed code blocks', async () => {
   const main = `
 export const hello = { str: "world" };
@@ -104,5 +118,7 @@ hello.
     transformers: [transformer],
   })
 
-  expect(styleTag + html).toMatchFileSnapshot('./out/includes/replaced_directives.html')
+  expect(styleTag + html).toMatchFileSnapshot(
+    './out/includes/replaced_directives.html',
+  )
 })