This commit adds new language service testing infrastructure which allows
for in-memory testing. It solves a number of issues with the previous
testing infrastructure that relied on a single integration project across
all of the tests, and also provides for much faster builds by using
the compiler-cli's mock versions of @angular/core and @angular/common.
A new `LanguageServiceTestEnvironment` class (conceptually mirroring the
compiler-cli `NgtscTestEnvironment`) controls setup and execution of tests.
The `FileSystem` abstraction is used to drive a `ts.server.ServerHost`,
which backs the language service infrastructure.
Since many language service tests revolve around the template, the API is
currently optimized to spin up a "skeleton" project and then override its
template for each test.
The existing Quick Info tests (quick_info_spec.ts) were ported to the new
infrastructure for validation. The tests were cleaned up a bit to remove
unnecessary initializations as well as correct legitimate template errors
which did not affect the test outcome, but caused additional validation of
test correctness to fail. They still utilize a shared project with all
fields required for each individual unit test, which is an anti-pattern, but
new tests can now easily be written independently without relying on the
shared project, which was extremely difficult previously. Future cleanup
work might refactor these tests to be more independent.
PR Close#39594
Rather than re-reading component metadata that was already interpreted
by the Ivy compiler, the Language Service should instead use the
compiler APIs to get information it needs about the metadata.
PR Close#39476
This commit takes the `HybridVisitor` in the language service and gives it
the ability to return not just a node but the template context in which it
appears. In the future, more context regarding where a node appears in the
template might become necessary (ex: the microsyntax container for binding
nodes), and this refactoring enables that.
In the process, `HybridVisitor` is renamed and the concept of a
`TemplateTarget` interface is introduced to contain the results of this
operation.
PR Close#39505
This commit enables the Ivy Language Service to 'go to definition' of a
templateUrl or styleUrl, which would jump to the template/style file
itself.
PR Close#39202
This commit fixes a bug in which a new Ivy Compiler is created every time
language service receives a new request. This is not needed if the
`ts.Program` has not changed.
A new class `CompilerFactory` is created to manage Compiler lifecycle and
keep track of template changes so that it knows when to override them.
With this change, we no longer need the method `getModifiedResourceFile()`
on the adapter. Instead, we call `overrideComponentTemplate` on the
template type checker.
This commit also changes the incremental build strategy from
`PatchedIncrementalBuildStrategy` to `TrackedIncrementalBuildStrategy`.
PR Close#39231
This PR enables `getSemanticDiagnostics()` to be called on external templates.
Several changes are needed to land this feature:
1. The adapter needs to implement two additional methods:
a. `readResource()`
Load the template from snapshot instead of reading from disk
b. `getModifiedResourceFiles()`
Inform the compiler that external templates have changed so that the
loader could invalidate its internal cache.
2. Create `ScriptInfo` for external templates in MockHost.
Prior to this, MockHost only track changes in TypeScript files. Now it
needs to create `ScriptInfo` for external templates as well.
For (1), in order to make sure we don't reload the template if it hasn't
changed, we need to keep track of its version. Since the complexity has
increased, the adapter is refactored into its own class.
PR Close#39065
The statements generated in the TCB are optimized for performance and producing diagnostics.
These optimizations can result in generating a TCB that does not have all the information
needed by the `TemplateTypeChecker` for retrieving `Symbol`s. For example, as an optimization,
the TCB will not generate variable declaration statements for directives that have no
references, inputs, or outputs. However, the `TemplateTypeChecker` always needs these
statements to be present in order to provide `ts.Symbol`s and `ts.Type`s for the directives.
This commit adds logic to the TCB generation to ensure the required
information is available in a form that the `TemplateTypeChecker` can
consume. It also adds an option to the `NgCompiler` that makes this
generation configurable.
PR Close#38618
Now that Ivy compiler has a proper `TemplateTypeChecker` interface
(see https://github.com/angular/angular/pull/38105) we no longer need to
keep the temporary compiler implementation.
The temporary compiler was created to enable testing infrastructure to
be developed for the Ivy language service.
This commit removes the whole `ivy/compiler` directory and moves two
functions `createTypeCheckingProgramStrategy` and
`getOrCreateTypeCheckScriptInfo` to the `LanguageService` class.
Also re-enable the Ivy LS test since it's no longer blocking development.
PR Close#38310
This commit removes compiler instantiation at startup.
This is because the constructor is invoked during the plugin loading phase,
in which the project has not been completely loaded.
Retrieving `ts.Program` at startup will trigger an `updateGraph` operation,
which could only be called after the Project has loaded completely.
Without this change, the Ivy LS cannot be loaded as a tsserver plugin.
Note that the whole `Compiler` class is temporary, so changes made there are
only for development. Once we have proper integration with ngtsc the
`Compiler` class would be removed.
PR Close#38120
This commit adds a Compiler interface that wraps the actual ngtsc
compiler. The language-service specific compiler manages multiple
typecheck files using the Project interface, creating and adding
ScriptInfos as necessary.
This commit also adds `overrideInlineTemplate()` method to the mock
service so that we could test the Compiler diagnostics feature.
PR Close#36930
Parse Angular compiler options in Angular language service.
In View Engine, only TypeScript compiler options are read, Angular
compiler options are not. With Ivy, there could be different modes of
compilation, most notably how strict the templates should be checked.
This commit makes the behavior of language service consistent with the
Ivy compiler.
PR Close#36922
This commit adds a new entry point for the Ivy version of language
service. The entry point is just a shell for now, implementation will be
added in subsequent PRs.
The Ivy version of language service could be loaded from the NPM package
via `require(@angular/language-service/bundles/ivy.umd.js)`
PR Close#36864
Alex Rickabaugh
Andrew Scott
Keen Yee Liau
Joey Perrott
Keen Yee Liau