Merge pull request #173 from Oblongmana/fix/theme-include-directory-j…

…oinin

Fix: `fetchTheme` theme 'include' directory joining for absolute paths

packages/shiki/src/__tests__/__mocks__/fs.ts

@@ -0,0 +1,33 @@
+// __mocks__/fs.ts
+import path from 'path'
+
+const fs = jest.createMockFromModule<any>('fs')
+
+// This is a custom function that our tests can use during setup to specify
+// what the files on the "mock" filesystem should look like when any of the
+// `fs` APIs are used.
+let mockFiles = Object.create(null)
+function __setMockFiles(newMockFiles) {
+  mockFiles = Object.create(null)
+  for (const file in newMockFiles) {
+    const dir = path.dirname(file)
+
+    if (!mockFiles[dir]) {
+      mockFiles[dir] = []
+    }
+    mockFiles[dir].push(path.basename(file))
+  }
+}
+
+// A custom version of `fs.promises.readFile` that reads from the special mocked out
+// file list set via __setMockFiles
+function promisesReadFile(directoryPath) {
+  return mockFiles[directoryPath] || []
+}
+
+fs.__setMockFiles = __setMockFiles
+fs.promises = {
+  readFile: promisesReadFile
+}
+
+module.exports = fs