1 files changed, 108 insertions, 0 deletions
diff --git a/remote/shared/test/xpcshell/test_Format.js b/remote/shared/test/xpcshell/test_Format.js
new file mode 100644
index 0000000000..cfdd35be08
--- /dev/null
+++ b/remote/shared/test/xpcshell/test_Format.js
@@ -0,0 +1,108 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const { truncate, pprint } = ChromeUtils.importESModule(
+  "chrome://remote/content/shared/Format.sys.mjs"
+);
+
+const MAX_STRING_LENGTH = 250;
+const HALF = "x".repeat(MAX_STRING_LENGTH / 2);
+
+add_task(function test_pprint() {
+  equal('[object Object] {"foo":"bar"}', pprint`${{ foo: "bar" }}`);
+
+  equal("[object Number] 42", pprint`${42}`);
+  equal("[object Boolean] true", pprint`${true}`);
+  equal("[object Undefined] undefined", pprint`${undefined}`);
+  equal("[object Null] null", pprint`${null}`);
+
+  let complexObj = { toJSON: () => "foo" };
+  equal('[object Object] "foo"', pprint`${complexObj}`);
+
+  let cyclic = {};
+  cyclic.me = cyclic;
+  equal("[object Object] <cyclic object value>", pprint`${cyclic}`);
+
+  let el = {
+    hasAttribute: attr => attr in el,
+    getAttribute: attr => (attr in el ? el[attr] : null),
+    nodeType: 1,
+    localName: "input",
+    id: "foo",
+    class: "a b",
+    href: "#",
+    name: "bar",
+    src: "s",
+    type: "t",
+  };
+  equal(
+    '<input id="foo" class="a b" href="#" name="bar" src="s" type="t">',
+    pprint`${el}`
+  );
+});
+
+add_task(function test_truncate_empty() {
+  equal(truncate``, "");
+});
+
+add_task(function test_truncate_noFields() {
+  equal(truncate`foo bar`, "foo bar");
+});
+
+add_task(function test_truncate_multipleFields() {
+  equal(truncate`${0}`, "0");
+  equal(truncate`${1}${2}${3}`, "123");
+  equal(truncate`a${1}b${2}c${3}`, "a1b2c3");
+});
+
+add_task(function test_truncate_primitiveFields() {
+  equal(truncate`${123}`, "123");
+  equal(truncate`${true}`, "true");
+  equal(truncate`${null}`, "");
+  equal(truncate`${undefined}`, "");
+});
+
+add_task(function test_truncate_string() {
+  equal(truncate`${"foo"}`, "foo");
+  equal(truncate`${"x".repeat(250)}`, "x".repeat(250));
+  equal(truncate`${"x".repeat(260)}`, `${HALF} ... ${HALF}`);
+});
+
+add_task(function test_truncate_array() {
+  equal(truncate`${["foo"]}`, JSON.stringify(["foo"]));
+  equal(truncate`${"foo"} ${["bar"]}`, `foo ${JSON.stringify(["bar"])}`);
+  equal(
+    truncate`${["x".repeat(260)]}`,
+    JSON.stringify([`${HALF} ... ${HALF}`])
+  );
+});
+
+add_task(function test_truncate_object() {
+  equal(truncate`${{}}`, JSON.stringify({}));
+  equal(truncate`${{ foo: "bar" }}`, JSON.stringify({ foo: "bar" }));
+  equal(
+    truncate`${{ foo: "x".repeat(260) }}`,
+    JSON.stringify({ foo: `${HALF} ... ${HALF}` })
+  );
+  equal(truncate`${{ foo: ["bar"] }}`, JSON.stringify({ foo: ["bar"] }));
+  equal(
+    truncate`${{ foo: ["bar", { baz: 42 }] }}`,
+    JSON.stringify({ foo: ["bar", { baz: 42 }] })
+  );
+
+  let complex = {
+    toString() {
+      return "hello world";
+    },
+  };
+  equal(truncate`${complex}`, "hello world");
+
+  let longComplex = {
+    toString() {
+      return "x".repeat(260);
+    },
+  };
+  equal(truncate`${longComplex}`, `${HALF} ... ${HALF}`);
+});