go/internal/lsp/tests
Robert Findley e06c10712b internal/lsp: normalize interface{} to any in test comparisons
The switch to use any in standard library signatures breaks many of our
tests that match signature strings exactly. Fix this by normalizing
strings to use 'any' in place of interface{}, before comparing.

Updates golang/go#49884

Change-Id: If18ce1035b3206f37d7de6e584cf2c2cae9481c5
Reviewed-on: https://go-review.googlesource.com/c/tools/+/370294
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2021-12-09 13:40:01 +00:00
..
README.md internal/lsp/semantic: fix some type definitions 2021-03-30 15:15:52 +00:00
normalizer.go internal/lsp: rewrite the workspace symbol marker tests 2020-11-24 17:38:01 +00:00
tests.go go/internal/gcimporter: update iimport.go to support type parameters 2021-09-15 00:13:36 +00:00
util.go internal/lsp: normalize interface{} to any in test comparisons 2021-12-09 13:40:01 +00:00

README.md

Testing

LSP has "marker tests" defined in internal/lsp/testdata, as well as traditional tests.

Marker tests

Marker tests have a standard input file, like internal/lsp/testdata/foo/bar.go, and some may have a corresponding golden file, like internal/lsp/testdata/foo/bar.go.golden. The former is the "input" and the latter is the expected output.

Each input file contains annotations like //@suggestedfix("}", "refactor.rewrite"). These annotations are interpreted by test runners to perform certain actions. The expected output after those actions is encoded in the golden file.

When tests are run, each annotation results in a new subtest, which is encoded in the golden file with a heading like,

-- suggestedfix_bar_11_21 --
// expected contents go here
-- suggestedfix_bar_13_20 --
// expected contents go here

The format of these headings vary: they are defined by the Golden function for each annotation. In the case above, the format is: annotation name, file name, annotation line location, annotation character location.

So, if internal/lsp/testdata/foo/bar.go has three suggestedfix annotations, the golden file should have three headers with suggestedfix_bar_xx_yy headings.

To see a list of all available annotations, see the exported "expectations" in tests.go.

To run marker tests,

cd /path/to/tools

# The marker tests are located in "internal/lsp", "internal/lsp/cmd, and
# "internal/lsp/source".
go test ./internal/lsp/...

There are quite a lot of marker tests, so to run one individually, pass the test path and heading into a -run argument:

cd /path/to/tools
go test ./internal/lsp/... -v -run TestLSP/Modules/SuggestedFix/bar_11_21

Resetting marker tests

Sometimes, a change is made to lsp that requires a change to multiple golden files. When this happens, you can run,

cd /path/to/tools
./internal/lsp/reset_golden.sh