[tests] Fix assertFalse(exception) anti-pattern

Some debugging tests relied on the following anti-pattern:

 let exception = false;

 try {
   /* ... some code that may throw on test failure ... */
 } catch (e) {
   exception = e;
 }

 assertFalse(exception);

This may be problematic if a falseish value is thrown.

Change-Id: I02eace4cc656fc9581928a90ac53cda4dc72b30c
Reviewed-on: https://chromium-review.googlesource.com/972822
Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Jakob Gruber <jgruber@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52105}

test/debugger/debug/debug-backtrace.js

@@ -42,8 +42,8 @@ function g() {
 
 Debug = debug.Debug
 
-listenerCalled = false;
-exception = false;
+let listenerCalled = false;
+let exceptionThrown = false;
 
 function listener(event, exec_state, event_data, data) {
   try {
@@ -82,7 +82,7 @@ function listener(event, exec_state, event_data, data) {
       listenerCalled = true;
     }
   } catch (e) {
-    exception = e;
+    exceptionThrown = true;
   };
 };
 
@@ -94,5 +94,5 @@ Debug.setBreakPoint(f, 0, 0);
 g();
 
 // Make sure that the debug event listener vas invoked.
-assertFalse(exception, "exception in listener");
+assertFalse(exceptionThrown, "exception in listener");
 assertTrue(listenerCalled);

test/debugger/debug/debug-bigint.js

@@ -5,7 +5,7 @@
 // Flags: --harmony-bigint
 
 Debug = debug.Debug
-let exception = false;
+let exceptionThrown = false;
 
 Debug.setListener(function(event, exec_state, event_data, data) {
   if (event != Debug.DebugEvent.Break) return;
@@ -16,9 +16,9 @@ Debug.setListener(function(event, exec_state, event_data, data) {
     assertEquals("bigint", typeof(o.value()));
     assertEquals(42n, o.value());
   } catch (e) {
-    exception = e;
+    exceptionThrown = true;
   };
 });
 
 !function() { debugger; }();
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener")

test/debugger/debug/debug-clearbreakpoint.js

@@ -28,8 +28,8 @@
 Debug = debug.Debug
 
 // Simple function which stores the last debug event.
-listenerComplete = false;
-exception = false;
+let listenerComplete = false;
+let exceptionThrown = false;
 
 var breakpoint = -1;
 
@@ -42,7 +42,7 @@ function listener(event, exec_state, event_data, data) {
       listenerComplete = true;
     }
   } catch (e) {
-    exception = e
+    exceptionThrown = true;
   };
 };
 
@@ -57,4 +57,4 @@ g();
 
 // Make sure that the debug event listener vas invoked.
 assertTrue(listenerComplete, "listener did not run to completion");
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener")

test/debugger/debug/debug-compile-event.js

@@ -27,7 +27,7 @@
 
 Debug = debug.Debug
 
-var exception = false;  // Exception in debug event listener.
+var exceptionThrown = false;  // Exception in debug event listener.
 var after_compile_count = 0;
 var compile_error_count = 0;
 var current_source = '';  // Current source being compiled.
@@ -85,7 +85,7 @@ function listener(event, exec_state, event_data, data) {
       }
     }
   } catch (e) {
-    exception = e
+    exceptionThrown = true;
   }
 };
 
@@ -110,7 +110,7 @@ try {
 }
 
 // Make sure that the debug event listener was invoked.
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener")
 
 // Number of before and after + error events should be the same.
 assertEquals(compile_error_count, 1);

test/debugger/debug/debug-evaluate-bool-constructor.js

@@ -29,7 +29,7 @@
 Debug = debug.Debug
 
 var listenerComplete = false;
-var exception = false;
+var exceptionThrown = false;
 
 function listener(event, exec_state, event_data, data) {
   try {
@@ -43,7 +43,7 @@ function listener(event, exec_state, event_data, data) {
     }
   } catch (e) {
     print(e);
-    exception = e
+    exceptionThrown = true;
   };
 };
 
@@ -60,5 +60,5 @@ callDebugger();
 
 
 // Make sure that the debug event listener vas invoked.
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener")
 assertTrue(listenerComplete, "listener did not run to completion");

test/debugger/debug/debug-evaluate-locals-optimized-double.js

@@ -30,7 +30,7 @@
 Debug = debug.Debug
 
 var listenerComplete = false;
-var exception = false;
+var exceptionThrown = false;
 
 var testingConstructCall = false;
 
@@ -127,7 +127,7 @@ function listener(event, exec_state, event_data, data) {
       listenerComplete = true;
     }
   } catch (e) {
-    exception = e.toString() + e.stack;
+    exceptionThrown = true;
   };
 };
 
@@ -191,7 +191,7 @@ new f(input.length - 1, 11.11, 12.12);
 new f(input.length - 1, 11.11, 12.12, "");
 
 // Make sure that the debug event listener was invoked.
-assertFalse(exception, "exception in listener " + exception)
+assertFalse(exceptionThrown, "exception in listener");
 assertTrue(listenerComplete);
 
 //Throw away type information for next run.

test/debugger/debug/debug-evaluate-locals-optimized.js

@@ -30,7 +30,7 @@
 Debug = debug.Debug
 
 var listenerComplete = false;
-var exception = false;
+var exceptionThrown = false;
 
 var testingConstructCall = false;
 
@@ -118,7 +118,7 @@ function listener(event, exec_state, event_data, data) {
       listenerComplete = true;
     }
   } catch (e) {
-    exception = e.toString() + e.stack;
+    exceptionThrown = true;
   };
 };
 
@@ -172,7 +172,7 @@ new f(expected.length - 1, 11, 12);
 new f(expected.length - 1, 11, 12, 0);
 
 // Make sure that the debug event listener was invoked.
-assertFalse(exception, "exception in listener " + exception)
+assertFalse(exceptionThrown, "exception in listener");
 assertTrue(listenerComplete);
 
 // Throw away type information for next run.

test/debugger/debug/debug-evaluate-locals.js

@@ -27,8 +27,8 @@
 
 Debug = debug.Debug
 
-listenerComplete = false;
-exception = false;
+let listenerComplete = false;
+let exceptionThrown = false;
 
 
 function h() {
@@ -132,7 +132,7 @@ function listener(event, exec_state, event_data, data) {
       listenerComplete = true;
     }
   } catch (e) {
-    exception = e;
+    exceptionThrown = true;
     print("Caught something. " + e + " " + e.stack);
   };
 };
@@ -145,5 +145,5 @@ var f_result = f();
 assertEquals("foobar", f_result);
 
 // Make sure that the debug event listener was invoked.
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener");
 assertTrue(listenerComplete);

test/debugger/debug/debug-evaluate-with.js

@@ -30,9 +30,9 @@
 
 Debug = debug.Debug
 
-listenerComplete = false;
-exception = false;
-breakPointCount = 0;
+let listenerComplete = false;
+let exceptionThrown = false;
+let breakPointCount = 0;
 
 function listener(event, exec_state, event_data, data) {
   try {
@@ -53,7 +53,7 @@ function listener(event, exec_state, event_data, data) {
       }
     }
   } catch (e) {
-    exception = e
+    exceptionThrown = true;
   };
 };
 
@@ -79,4 +79,4 @@ eval("with({bar:'with'}) { (function g() { var foo = 'local'; debugger; })(); }"
 
 // Make sure that the debug event listener vas invoked.
 assertEquals(3, breakPointCount);
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener");

test/debugger/debug/debug-evaluate.js

@@ -27,8 +27,8 @@
 
 Debug = debug.Debug
 
-listenerComplete = false;
-exception = false;
+let listenerComplete = false;
+let exceptionThrown = false;
 
 function listener(event, exec_state, event_data, data) {
   try {
@@ -51,7 +51,7 @@ function listener(event, exec_state, event_data, data) {
       listenerComplete = true;
     }
   } catch (e) {
-   exception = e
+   exceptionThrown = true;
   };
 };
 
@@ -80,6 +80,6 @@ for (var i = 0; i < 4; i++) {
 Debug.setBreakPoint(f, 2, 0);
 g();
 
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener");
 // Make sure that the debug event listener vas invoked.
 assertTrue(listenerComplete, "listener did not run to completion");

test/debugger/debug/debug-return-value.js

@@ -27,12 +27,12 @@
 
 Debug = debug.Debug
 
-listener_complete = false;
-exception = false;
-break_count = 0;
-expected_return_value = 0;
-expected_source_position = [];
-debugger_source_position = 0;
+let listener_complete = false;
+let exceptionThrown = false;
+let break_count = 0;
+let expected_return_value = 0;
+let expected_source_position = [];
+let debugger_source_position = 0;
 
 // Listener which expects to do four steps to reach returning from the function.
 function listener(event, exec_state, event_data, data) {
@@ -72,7 +72,7 @@ function listener(event, exec_state, event_data, data) {
       }
     }
   } catch (e) {
-    exception = e
+    exceptionThrown = true;
     print(e + e.stack)
   };
 };
@@ -93,7 +93,7 @@ expected_return_value = 2;
 expected_source_position = [10, 38, 47];
 listener_complete = false;
 f();
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener");
 assertTrue(listener_complete);
 assertEquals(4, break_count);
 
@@ -102,7 +102,7 @@ expected_return_value = 1;
 expected_source_position = [10, 19, 28];
 listener_complete = false;
 f(true);
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener");
 assertTrue(listener_complete);
 assertEquals(4, break_count);
 
@@ -111,6 +111,6 @@ expected_return_value = 2;
 expected_source_position = [10, 38, 47];
 listener_complete = false;
 f(false);
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener");
 assertTrue(listener_complete);
 assertEquals(4, break_count);

test/debugger/debug/es8/async-debug-basic.js

@@ -4,8 +4,9 @@
 
 Debug = debug.Debug
 
-listenerComplete = false;
-breakPointCount = 0;
+let listenerComplete = false;
+let breakPointCount = 0;
+let exceptionThrown = false;
 
 async function f() {
   await (async function() { var a = "a"; await 1; debugger; })();
@@ -13,7 +14,7 @@ async function f() {
   var b = "b";
 
   assertTrue(listenerDone);
-  assertFalse(exception);
+  assertFalse(exceptionThrown);
   assertEquals(1, breakpointCount);
 }
 
@@ -27,7 +28,7 @@ function listener(event, exec_state, event_data, data) {
     assertEquals("b", exec_state.frame(1).evaluate("b"));
     assertEquals("c", exec_state.frame(2).evaluate("c"));
   } catch (e) {
-    exception = e;
+    exceptionThrown = true;
   };
 };
 

test/debugger/debug/regress/regress-1081309.js

@@ -29,8 +29,8 @@ Debug = debug.Debug
 
 // Make sure that the backtrace command can be processed when the receiver is
 // undefined.
-listenerCalled = false;
-exception = false;
+let listenerCalled = false;
+let exceptionThrown = false;
 
 function listener(event, exec_state, event_data, data) {
   try {
@@ -47,7 +47,7 @@ function listener(event, exec_state, event_data, data) {
     }
   } catch (e) {
     print(e);
-    exception = e
+    exceptionThrown = true;
   };
 };
 
@@ -67,6 +67,6 @@ try {
   // Ignore the exception "Cannot call method 'x' of undefined"
 }
 
-assertFalse(exception, "exception in listener", exception)
+assertFalse(exceptionThrown, "exception in listener");
 // Make sure that the debug event listener vas invoked.
 assertTrue(listenerCalled, "listener not called");

test/debugger/debug/regress/regress-1170187.js

@@ -31,8 +31,8 @@
 
 Debug = debug.Debug
 
-listenerCalled = false;
-exception = false;
+let listenerCalled = false;
+let exceptionThrown = false;
 
 
 function checkName(name) {
@@ -64,7 +64,7 @@ function listener(event, exec_state, event_data, data) {
       listenerCalled = true;
     }
   } catch (e) {
-    exception = e;
+    exceptionThrown = true;
   };
 };
 
@@ -77,4 +77,4 @@ Debug.setListener(listener);
 
 // Make sure that the debug event listener vas invoked (again).
 assertTrue(listenerCalled);
-assertFalse(exception, "exception in listener")
+assertFalse(exceptionThrown, "exception in listener")

test/debugger/debug/regress/regress-119609.js

@@ -28,7 +28,7 @@
 
 Debug = debug.Debug;
 
-var exception = false;
+var exceptionThrown = false;
 
 function listener(event, exec_state, event_data, data) {
   try {
@@ -44,7 +44,7 @@ function listener(event, exec_state, event_data, data) {
       assertThrows(() => lookup("b"), ReferenceError);
     }
   } catch (e) {
-    exception = e.toString() + e.stack;
+    exceptionThrown = true;
   }
 }
 
@@ -63,4 +63,4 @@ function f(a, b) {
 
 f(1, 2)(3, 4);
 
-assertFalse(exception);
+assertFalse(exceptionThrown);

test/debugger/debug/regress/regress-131994.js

@@ -33,7 +33,7 @@
 
 Debug = debug.Debug;
 
-var exception = false;
+var exceptionThrown = false;
 
 function listener(event, exec_state, event_data, data) {
   if (event != Debug.DebugEvent.Break) return;
@@ -44,7 +44,7 @@ function listener(event, exec_state, event_data, data) {
     // Assert correct value.
     assertEquals(3, breakpoint.evaluate('x').value());
   } catch (e) {
-    exception = e;
+    exceptionThrown = true;
   }
 }
 
@@ -67,4 +67,4 @@ function h() {
 
 h();
 
-assertFalse(exception);
+assertFalse(exceptionThrown);

test/debugger/debug/regress/regress-1639.js

@@ -27,7 +27,7 @@
 
 Debug = debug.Debug
 var breaks = 0;
-var exception = false;
+var exceptionThrown = false;
 
 function listener(event, exec_state, event_data, data) {
   try {
@@ -43,7 +43,7 @@ function listener(event, exec_state, event_data, data) {
     }
   } catch (e) {
     print(e);
-    exception = true;
+    exceptionThrown = true;
   }
 }
 
@@ -72,4 +72,4 @@ Debug.setBreakPoint(b, 0, 0);
 a(b);
 a(); // BREAK 3
 
-assertFalse(exception);
+assertFalse(exceptionThrown);

test/debugger/regress/regress-1639-2.js

@@ -27,7 +27,7 @@
 
 // Get the Debug object exposed from the debug context global object.
 Debug = debug.Debug
-var exception = false;
+var exceptionThrown = false;
 var state = 0;
 
 function listener(event, exec_state, event_data, data) {
@@ -57,7 +57,7 @@ function listener(event, exec_state, event_data, data) {
     }
   } catch (e) {
     print(e);
-    exception = true;
+    exceptionThrown = true;
   }
 }
 
@@ -70,4 +70,4 @@ function a() {
 // Set a break point and call to invoke the debug event listener.
 Debug.setBreakPoint(a, 0, 0);
 a();
-assertFalse(exception);
+assertFalse(exceptionThrown);