Add testing module

Original: https://github.com/denoland/deno_std/commit/61fdae51a7cc50874b9674c40b1aef3fbf012494

1 files changed, 57 insertions, 0 deletions

diff --git a/testing/test.ts b/testing/test.ts
new file mode 100644
index 000000000..7012a6e47
--- /dev/null
+++ b/testing/test.ts
@@ -0,0 +1,57 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+
+import { test, assert, assertEqual, equal } from "./mod.ts";
+
+test(function testingEqual() {
+  assert(equal("world", "world"));
+  assert(!equal("hello", "world"));
+  assert(equal(5, 5));
+  assert(!equal(5, 6));
+  assert(equal(NaN, NaN));
+  assert(equal({ hello: "world" }, { hello: "world" }));
+  assert(!equal({ world: "hello" }, { hello: "world" }));
+  assert(
+    equal(
+      { hello: "world", hi: { there: "everyone" } },
+      { hello: "world", hi: { there: "everyone" } }
+    )
+  );
+  assert(
+    !equal(
+      { hello: "world", hi: { there: "everyone" } },
+      { hello: "world", hi: { there: "everyone else" } }
+    )
+  );
+});
+
+test(function testingAssertEqual() {
+  const a = Object.create(null);
+  a.b = "foo";
+  assertEqual(a, a);
+});
+
+test(function testingAssertEqualActualUncoercable() {
+  let didThrow = false;
+  const a = Object.create(null);
+  try {
+    assertEqual(a, "bar");
+  } catch (e) {
+    didThrow = true;
+    console.log(e.message);
+    assert(e.message === "actual: [Cannot display] expected: bar");
+  }
+  assert(didThrow);
+});
+
+test(function testingAssertEqualExpectedUncoercable() {
+  let didThrow = false;
+  const a = Object.create(null);
+  try {
+    assertEqual("bar", a);
+  } catch (e) {
+    didThrow = true;
+    console.log(e.message);
+    assert(e.message === "actual: bar expected: [Cannot display]");
+  }
+  assert(didThrow);
+});