test: load prettierrc

package.json

@@ -80,7 +80,7 @@
     "@types/jest": "^22.0.0",
     "@types/make-dir": "^1.0.1",
     "@types/node": "^9.3.0",
-    "@types/prettier": "^1.5.0",
+    "@types/prettier": "^1.10.0",
     "codelyzer": "4.1.0",
     "commitizen": "^2.9.5",
     "cz-conventional-changelog": "^2.0.0",

src/.prettierrc

@@ -0,0 +1 @@
+{}

tools/runtime.ts

@@ -3,15 +3,15 @@ import * as prettier from "prettier";
 import * as tslint from "tslint";
 
 export function format(filename: string, source: string) {
-  return prettier.format(source, { filepath: filename });
+  const options = prettier.resolveConfig.sync(filename, { editorconfig: false });
+  return prettier.format(source, { filepath: filename, ...options });
 }
 
 export function lint(filename: string, source: string) {
   const dirname = path.dirname(filename);
 
   const tslintPath = path.join(dirname, "tslint.json");
-  const tslintConfig = tslint.Linter.findConfiguration(tslintPath, "")
-    .results;
+  const tslintConfig = tslint.Linter.findConfiguration(tslintPath, "").results;
   const linter = new tslint.Linter({ fix: false, formatter: "verbose" });
 
   linter.lint(filename, source, tslintConfig);