Add console.assert (denoland#102)

gusha915 · Jun 5, 2018 · 874db2a · 874db2a
1 parent 71d7891
commit 874db2a
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diff --git a/globals.ts b/globals.ts
@@ -32,6 +32,13 @@ _global["console"] = {
  // tslint:disable-next-line:no-any
  error(...args: any[]): void {
  print("ERROR: " + stringifyArgs(args));
+ },
+
+ // tslint:disable-next-line:no-any
+ assert(condition: boolean, ...args: any[]): void {
+ if (!condition) {
+ throw new Error("Assertion failed: " + stringifyArgs(args));
+ }
  }
 };
 

diff --git a/tests.ts b/tests.ts
@@ -19,6 +19,18 @@ test(async function tests_fetch() {
  assertEqual(json.name, "deno");
 });
 
+test(function tests_console_assert() {
+ console.assert(true);
+
+ let hasThrown = false;
+ try {
+ console.assert(false);
+ } catch {
+ hasThrown = true;
+ }
+ assertEqual(hasThrown, true);
+});
+
 test(async function tests_readFileSync() {
  const data = readFileSync("package.json");
  if (!data.byteLength) {