Nicholas Shahan
d50097a4ec
Reduces the number of libraries that must be migrated to null safety atomically. Change-Id: I498f2956471be0435558c1b1a4badcba619f15de Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/247521 Reviewed-by: Sigmund Cherem <sigmund@google.com> Commit-Queue: Nicholas Shahan <nshahan@google.com>
65 lines
2.5 KiB
Markdown
65 lines
2.5 KiB
Markdown
# Testing of source maps
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This folder contains two types of tests for validating sourcemaps:
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the debugging behavior and the stacktrace behavior.
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Running the tests requires the compilation of the correct targets. DDC currently also
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requires `ddc_sdk.dill` inside
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`{sdkroot}/{out,xcodebuild}/{ReleaseX64,ReleaseARM64}/ddc_sdk.dill`.
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Except for that, running them should simply be a matter of executing the `*_suite.dart` files.
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All tests are plain Dart files and goes in "testfiles" (debugging tests) or "stacktrace_testfiles"
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(stacktrace tests). They are automatically picked up by the testing framework.
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## Debugging tests (step tests)
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See `README.md` in `pkg/sourcemap_testing`.
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### Debugging a test
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One can filter which tests are run by running (from the sourcemap folder):
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```
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dart sourcemaps_ddk_suite.dart -- sourcemaps_ddk/printing_class_fields
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```
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One can additionally get debug output for failing tests (i.e. tests with different outcome than
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expected), e.g.:
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```
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dart sourcemaps_ddk_suite.dart -Ddebug=true -- sourcemaps_ddk/printing_class_fields
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```
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The latter is also useful in combination with `/*fail*/` when adding new tests to see all the places
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where the debugger stopped (both in JS positions and translated to dart positions).
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For instance `-Ddebug=true -- sourcemaps_ddk/next_through_catch_test` with a `/*fail*/`
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currently gives output like the following:
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```
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Stop #1
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test.main = function() { | main() {
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try { | try {
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let value = /*STOP*/"world"; | var value = /*STOP*/"world";
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dart.throw(dart.str`Hello, ${value}`); | // Comment
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} catch (e) { | throw "Hello, $value";
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Stop #2
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try { | var value = "world";
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let value = "world"; | // Comment
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/*STOP*/dart.throw(dart.str`Hello, ${value}`); | /*STOP*/throw "Hello, $value";
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} catch (e) { | }
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let st = dart.stackTrace(e); | // Comment
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Stop #3
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dart.throw(dart.str`Hello, ${value}`); | }
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} catch (e) { | // Comment
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let st = /*STOP*/dart.stackTrace(e); | catch (e, /*STOP*/st) {
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{ | print(e);
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core.print(e); | print(st);
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[...]
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```
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