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-rw-r--r--js/src/tests/ecma_6/LexicalEnvironment/unscopables-getters.js41
1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/LexicalEnvironment/unscopables-getters.js b/js/src/tests/ecma_6/LexicalEnvironment/unscopables-getters.js
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index 000000000..136078798
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+++ b/js/src/tests/ecma_6/LexicalEnvironment/unscopables-getters.js
@@ -0,0 +1,41 @@
+// @@unscopables checks can call getters.
+
+// The @@unscopables property itself can be a getter.
+let hit1 = 0;
+let x = "global x";
+let env1 = {
+ x: "env1.x",
+ get [Symbol.unscopables]() {
+ hit1++;
+ return {x: true};
+ }
+};
+with (env1)
+ assertEq(x, "global x");
+assertEq(hit1, 1);
+
+// It can throw; the exception is propagated out.
+function Fit() {}
+with ({x: 0, get [Symbol.unscopables]() { throw new Fit; }})
+ assertThrowsInstanceOf(() => x, Fit);
+
+// Individual properties on the @@unscopables object can have getters.
+let hit2 = 0;
+let env2 = {
+ x: "env2.x",
+ [Symbol.unscopables]: {
+ get x() {
+ hit2++;
+ return true;
+ }
+ }
+};
+with (env2)
+ assertEq(x, "global x");
+assertEq(hit2, 1);
+
+// And they can throw.
+with ({x: 0, [Symbol.unscopables]: {get x() { throw new Fit; }}})
+ assertThrowsInstanceOf(() => x, Fit);
+
+reportCompare(0, 0);