1 files changed, 38 insertions, 0 deletions
diff --git a/std/fs/write_file_str_test.ts b/std/fs/write_file_str_test.ts
new file mode 100644
index 000000000..77b1e734e
--- /dev/null
+++ b/std/fs/write_file_str_test.ts
@@ -0,0 +1,38 @@
+import { test } from "../testing/mod.ts";
+import { assertEquals } from "../testing/asserts.ts";
+import { writeFileStr, writeFileStrSync } from "./write_file_str.ts";
+import * as path from "./path/mod.ts";
+
+const testdataDir = path.resolve("fs", "testdata");
+
+test(function testReadFileSync(): void {
+  const jsonFile = path.join(testdataDir, "write_file_1.json");
+  const content = "write_file_str_test";
+  writeFileStrSync(jsonFile, content);
+
+  // make sure file have been create.
+  Deno.statSync(jsonFile);
+
+  const result = new TextDecoder().decode(Deno.readFileSync(jsonFile));
+
+  // remove test file
+  Deno.removeSync(jsonFile);
+
+  assertEquals(content, result);
+});
+
+test(async function testReadFile(): Promise<void> {
+  const jsonFile = path.join(testdataDir, "write_file_2.json");
+  const content = "write_file_str_test";
+  await writeFileStr(jsonFile, content);
+
+  // make sure file have been create.
+  await Deno.stat(jsonFile);
+
+  const result = new TextDecoder().decode(await Deno.readFile(jsonFile));
+
+  // remove test file
+  await Deno.remove(jsonFile);
+
+  assertEquals(content, result);
+});