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Rob Findley f9587291b6 internal/lsp/fake: add fakes for testing editor interaction
A lot of bug reports originating from LSP clients are related to either
the timing or sequence of editor interactions with gopls (or at least
they're originally reported this way). For example: "when I open a
package and then create a new file, I lose diagnostics for existing
files".  These conditions are often hard to reproduce, and to isolate as
either a gopls bug or a bug in the editor.

Right now we're relying on govim integration tests to catch these
regressions, but it's important to also have a testing framework that
can exercise this functionality in-process.  As a starting point this CL
adds test fakes that implement a high level API for scripting editor
interactions. A fake workspace can be used to sandbox file operations; a
fake editor provides an interface for text editing operations; a fake
LSP client can be used to connect the fake editor to a gopls instance.
Some tests are added to the lsprpc package to demonstrate the API.

The primary goal of these fakes should be to simulate an client that
complies to the LSP spec. Put another way: if we have a bug report that
we can't reproduce with our regression tests, it should either be a bug
in our test fakes or a bug in the LSP client originating the report.

I did my best to comply with the spec in this implementation, but it
will certainly develop as we write more tests. We will also need to add
to the editor API in the future for testing more language features.

Updates golang/go#36879
Updates golang/go#34111

Change-Id: Ib81188683a7066184b8a254275ed5525191a2d68
Reviewed-on: https://go-review.googlesource.com/c/tools/+/217598
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
2020-02-10 17:44:19 +00:00
benchmark/parse benchmark/parse: add unit test for String function 2019-12-16 21:43:19 +00:00
blog blog: fix swallowed error 2019-12-18 19:17:56 +00:00
cmd all: fix some staticcheck errors 2020-01-29 04:53:41 +00:00
container/intsets all: fix some staticcheck errors 2020-01-29 04:53:41 +00:00
cover cover: error on negative numbers in profiles 2020-01-15 21:23:19 +00:00
go go/packages/packagestest: do not overwrite existing go.mod file 2020-02-06 15:23:23 +00:00
godoc all: fix some staticcheck errors 2020-01-29 04:53:41 +00:00
gopls fix(readme): expected comma 2020-02-07 13:10:02 +00:00
imports imports: pass more of the environment 2019-12-17 00:36:01 +00:00
internal internal/lsp/fake: add fakes for testing editor interaction 2020-02-10 17:44:19 +00:00
playground playground/socket: handle multi-file present play snippets 2019-12-03 04:46:16 +00:00
present all: fix some staticcheck errors 2020-01-29 04:53:41 +00:00
refactor all: fix more typos 2019-09-11 15:13:14 +00:00
txtar txtar/archive: add unit test function for Format 2019-11-20 20:49:00 +00:00
.gitattributes tools: copying .gitattributes to all subrepositories (fixes windows build) 2014-12-23 06:32:51 +00:00
.gitignore .gitignore: roll back ".gitignore: ignore emacs backup files" 2018-02-13 00:43:28 +00:00
AUTHORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
codereview.cfg tools: add codereview.cfg 2015-03-18 17:04:00 +00:00
CONTRIBUTING.md CONTRIBUTING.md: remove note about not accepting Pull Requests 2018-03-14 18:02:17 +00:00
CONTRIBUTORS go.empty: prototype for new subrepository 2012-01-25 14:45:13 -05:00
go.mod internal/lsp: create parseModHandle for storing go.mod data 2019-12-13 22:03:54 +00:00
go.sum internal/lsp: create parseModHandle for storing go.mod data 2019-12-13 22:03:54 +00:00
LICENSE LICENSE: add 2012-03-17 15:20:58 +11:00
PATENTS go.empty: add PATENTS file to the subrepo. 2012-04-16 11:24:04 +10:00
README.md README: switch to Markdown and add links 2017-09-27 05:40:07 +00:00

Go Tools

This subrepository holds the source for various packages and tools that support the Go programming language.

Some of the tools, godoc and vet for example, are included in binary Go distributions.

Others, including the Go guru and the test coverage tool, can be fetched with go get.

Packages include a type-checker for Go and an implementation of the Static Single Assignment form (SSA) representation for Go programs.

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The easiest way to install is to run go get -u golang.org/x/tools/.... You can also manually git clone the repository to $GOPATH/src/golang.org/x/tools.

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