1 files changed, 99 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Script-startColumn.js b/js/src/jit-test/tests/debug/Script-startColumn.js
new file mode 100644
index 0000000000..5f8f0c5d4e
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Script-startColumn.js
@@ -0,0 +1,99 @@
+// Script.prototype.startColumn returns the correct column for all scripts.
+
+const g = newGlobal({newCompartment: true, useWindowProxy: true});
+const dbg = Debugger(g);
+const gw = dbg.addDebuggee(g);
+
+function test(f, expected) {
+    const fw = gw.makeDebuggeeValue(f);
+    assertEq(fw.callable, true);
+    assertEq(fw.script.startColumn, expected);
+}
+
+g.eval(`
+function f1() { }
+`);
+test(g.f1, 11);
+
+g.eval(`
+var f2 = function({ a, b, c }, d, e, ...more) { };
+`);
+test(g.f2, 17);
+
+g.eval(`
+var f3 = function *() { };
+`);
+test(g.f3, 19);
+
+g.eval(`
+var f4 = async function
+  () { };
+`);
+test(g.f4, 2);
+
+g.eval(`
+var f5 = (a, b) => a + b;
+`);
+test(g.f5, 9);
+
+g.eval(`
+var f6 = a => a + 1;
+`);
+test(g.f6, 9);
+
+g.eval(`
+var MyClass = class {
+    method() { }
+};
+var myInstance = new MyClass();
+`);
+test(g.myInstance.method, 10);
+test(g.myInstance.constructor, 14);
+
+const gEager = newGlobal({newCompartment: true, useWindowProxy: true, disableLazyParsing: true});
+const eagerDbg = Debugger(gEager);
+const gEagerWrapped = eagerDbg.addDebuggee(gEager);
+gEager.eval(`
+function f7() { }
+`);
+const f7w = gEagerWrapped.makeDebuggeeValue(gEager.f7);
+assertEq(f7w.callable, true);
+assertEq(f7w.script.startColumn, 11);
+
+g.eval(`
+function f8() {
+    return function f8Inner() { }
+}
+`);
+test(g.f8, 11);
+test(g.f8(), 27);
+
+g.eval(`
+var f9 = new Function(\"\");
+`);
+test(g.f9, 0);
+
+let hit = 0;
+let column;
+dbg.onDebuggerStatement = function (frame) {
+    column = frame.script.startColumn;
+    hit += 1;
+};
+
+g.eval(`    debugger;`);
+assertEq(column, 0);
+assertEq(hit, 1);
+
+const location = { fileName: "column.js", lineNumber: 1, columnNumber: 1 };
+hit = 0;
+g.evaluate(`    debugger;`, location);
+assertEq(column, 1);
+assertEq(hit, 1);
+
+g.evaluate(`var f10 = function () { };`, location);
+test(g.f10, 20);
+
+g.evaluate(`
+var f11 = function () { };
+`, location);
+test(g.f11, 19);