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author | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-11-10 11:39:27 +0100 |
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committer | wolfbeast <mcwerewolf@wolfbeast.com> | 2019-11-10 11:39:27 +0100 |
commit | 974a481d12bf430891725bd3662876358e57e11a (patch) | |
tree | cad011151456251fef2f1b8d02ef4b4e45fad61a /js/src/tests/js1_8_5/reflect-parse/object-rest.js | |
parent | 6bd66b1728eeddb058066edda740aaeb2ceaec23 (diff) | |
parent | 736d25cbec4541186ed46c935c117ce4d1c7f3bb (diff) | |
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Merge branch 'master' into js-modules
# Conflicts:
# modules/libpref/init/all.js
Diffstat (limited to 'js/src/tests/js1_8_5/reflect-parse/object-rest.js')
-rw-r--r-- | js/src/tests/js1_8_5/reflect-parse/object-rest.js | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/js/src/tests/js1_8_5/reflect-parse/object-rest.js b/js/src/tests/js1_8_5/reflect-parse/object-rest.js new file mode 100644 index 000000000..5af06909b --- /dev/null +++ b/js/src/tests/js1_8_5/reflect-parse/object-rest.js @@ -0,0 +1,45 @@ +// |reftest| skip-if(!xulRuntime.shell) + +function property(key, value = key, shorthand = key === value) { + return { key, value, shorthand }; +} + +function assertDestrAssign(src, pattern) { + assertExpr(`(${src} = 0)`, aExpr("=", pattern, lit(0))); +} + +function assertDestrBinding(src, pattern) { + assertDecl(`var ${src} = 0`, varDecl([{id: pattern, init: lit(0)}])); +} + +function test() { + // Target expression must be a simple assignment target or a nested pattern + // in object assignment patterns. + assertDestrAssign("{...x}", objPatt([spread(ident("x"))])); + assertDestrAssign("{...(x)}", objPatt([spread(ident("x"))])); + assertDestrAssign("{...obj.p}", objPatt([spread(dotExpr(ident("obj"), ident("p")))])); + assertDestrAssign("{...{}}", objPatt([spread(objPatt([]))])); + assertDestrAssign("{...[]}", objPatt([spread(arrPatt([]))])); + + // Object binding patterns only allow binding identifiers or nested patterns. + assertDestrBinding("{...x}", objPatt([spread(ident("x"))])); + assertDestrBinding("{...{}}", objPatt([spread(objPatt([]))])); + assertDestrBinding("{...[]}", objPatt([spread(arrPatt([]))])); + + // The rest-property can be preceded by other properties. + for (var assertDestr of [assertDestrAssign, assertDestrBinding]) { + assertDestr("{a, ...x}", objPatt([property(ident("a")), spread(ident("x"))])); + assertDestr("{a: b, ...x}", objPatt([property(ident("a"), ident("b")), spread(ident("x"))])); + assertDestr("{[a]: b, ...x}", objPatt([property(comp(ident("a")), ident("b")), spread(ident("x"))])); + } + + // Tests when __proto__ is used in the object pattern. + for (var assertDestr of [assertDestrAssign, assertDestrBinding]) { + assertDestr("{...__proto__}", objPatt([spread(ident("__proto__"))])); + assertDestr("{__proto__, ...x}", objPatt([property(ident("__proto__")), spread(ident("x"))])); + } + assertDestrAssign("{__proto__: a, ...x}", objPatt([property(lit("__proto__"), ident("a")), spread(ident("x"))])); + assertDestrBinding("{__proto__: a, ...x}", objPatt([property(ident("__proto__"), ident("a")), spread(ident("x"))])); +} + +runtest(test); |