Map-constructor-1.js

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// The Map constructor creates an empty Map by default.

load(libdir + "asserts.js");

var m = new Map();

assertEq(m.size, 0);

m = new Map(undefined);

assertEq(m.size, 0);

m = new Map(null);

assertEq(m.size, 0);

assertThrowsInstanceOf(() => Map(), TypeError);

assertThrowsInstanceOf(() => Map(undefined), TypeError);

assertThrowsInstanceOf(() => Map(null), TypeError);