Move testdata/read_file_sync.ts to tests.ts

We don't need to start a new process for every test.

testdata/read_file_sync.ts

@@ -1,14 +0,0 @@
-import { readFileSync } from "deno";
-
-let data = readFileSync("package.json");
-if (!data.byteLength) {
-  throw Error(`Expected positive value for data.byteLength ${data.byteLength}`);
-}
-
-const decoder = new TextDecoder("utf-8");
-const json = decoder.decode(data);
-const pkg = JSON.parse(json);
-if (pkg.name !== "deno") {
-  throw Error(`Expected "deno" but got "${pkg.name}"`)
-}
-console.log("package.name ", pkg.name);

testdata/read_file_sync.ts.out

@@ -1 +0,0 @@
-package.name  deno

tests.ts

@@ -1,5 +1,22 @@
-import { test, assert } from "./deno_testing/testing.ts";
+// This test is executed as part of integration_test.go
+// But it can also be run manually:
+//  ./deno tests.ts
+import { test, assert, assertEqual } from "./deno_testing/testing.ts";
+import { readFileSync } from "deno";
 
-test(async function test_matchTesters() {
+test(async function tests_test() {
-  assert(false, "assert failed on purpose.");
+  assert(true);
+});
+
+test(async function tests_readFileSync() {
+  let data = readFileSync("package.json");
+  if (!data.byteLength) {
+    throw Error(
+      `Expected positive value for data.byteLength ${data.byteLength}`
+    );
+  }
+  const decoder = new TextDecoder("utf-8");
+  const json = decoder.decode(data);
+  const pkg = JSON.parse(json);
+  assertEqual(pkg.name, "deno");
 });