diff options
Diffstat (limited to 'toolkit/modules/tests/xpcshell/test_ObjectUtils_strict.js')
-rw-r--r-- | toolkit/modules/tests/xpcshell/test_ObjectUtils_strict.js | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/toolkit/modules/tests/xpcshell/test_ObjectUtils_strict.js b/toolkit/modules/tests/xpcshell/test_ObjectUtils_strict.js new file mode 100644 index 0000000000..c0c9841351 --- /dev/null +++ b/toolkit/modules/tests/xpcshell/test_ObjectUtils_strict.js @@ -0,0 +1,29 @@ +"use strict"; + +var { ObjectUtils } = ChromeUtils.importESModule( + "resource://gre/modules/ObjectUtils.sys.mjs" +); +var { PromiseTestUtils } = ChromeUtils.importESModule( + "resource://testing-common/PromiseTestUtils.sys.mjs" +); + +add_task(async function test_strict() { + let loose = { a: 1 }; + let strict = ObjectUtils.strict(loose); + + loose.a; // Should not throw. + loose.b || undefined; // Should not throw. + + strict.a; // Should not throw. + PromiseTestUtils.expectUncaughtRejection(/No such property: "b"/); + Assert.throws(() => strict.b, /No such property: "b"/); + "b" in strict; // Should not throw. + strict.b = 2; + strict.b; // Should not throw. + + PromiseTestUtils.expectUncaughtRejection(/No such property: "c"/); + Assert.throws(() => strict.c, /No such property: "c"/); + "c" in strict; // Should not throw. + loose.c = 3; + strict.c; // Should not throw. +}); |