This commit adds a method `overrideInlineTemplate` to the
`MockTypescriptHost`. This allows us to override an inline template
in a Component without changing the TypeScript parts. This methods works
in a similar way as `MockTypescriptHost.override()`, which is used for
overriding external template.
PR Close#36890
This commit adds a new mock host for testing the ivy language service.
Unlike the existing mock_host which mocks the LanguageServiceHost, the
Ivy mock host mocks just the filesystem interface, aka ts.ServerHost.
This is because Ivy language service requires an actual Project to
perform operations like adding synthetic typecheck files to the project,
and by extension, to the ts.Program. These requirements make the existing
mock host unsuitable to be reused.
This new testing structure also improves test performance, because the
old mock host copies (it actually creates symlinks, but still that's
relatively expensive due to the sheer number of files involved) all
@angular/* packages along with the typescript package to a temporary
node_modules directory. This is done every time setup() is called.
Instead, this new mock host just loads them from a pre-determined path
in Bazel runfiles.
PR Close#36879
This commit makes the test project a filegroup so that it could be
shared with the Ivy tests.
Also removed `project/foo.ts` since it is no longer used.
PR Close#36865
This commit fixes how the language service evaluates the compatibility
of types to work with arbitrary union types. As a result, compatibility
checks are now more strict and can catch similarities or differences
more clearly.
```
number|string == string|null // OK
number|string == number // OK
number|string == null // not comparable
number == string // not comparable
```
Using Ivy as a backend should provide these diagnoses for free, but we
can backfill them for now.
Closes https://github.com/angular/vscode-ng-language-service/issues/723
PR Close#36529
This commit removes individual components from parsing-cases.ts and
colocate them with the actual tests. This makes the tests more readable.
PR Close#36495
1. update jasmine to 3.5
2. update @types/jasmine to 3.5
3. update @types/jasminewd2 to 2.0.8
Also fix several cases, the new jasmine 3 will help to create test cases correctly,
such as in the `jasmine 2.x` version, the following case will pass
```
expect(1 == 2);
```
But in jsamine 3, the case will need to be
```
expect(1 == 2).toBeTrue();
```
PR Close#34625
clang-format was recently updated and any PRs that touch files in the
language service will have to reformat all the files.
Instead of changing the formatting in those PRs, this PR formats all
files in language-service package once and for all.
PR Close#36426
Currently the language service only provides support for determining the
type of array-like members when the array-like object is an `Array`.
However, there are other kinds of array-like objects, including
`ReadonlyArray`s and `readonly`-property arrays. This commit adds
support for retrieving the element type of arbitrary array-like objects.
Closes#36191
PR Close#36312
This commit improves the context of a non-callable function error
message by providing the affected call target and its non-callable type.
PR Close#35271
This commit propagates the `sourceSpan` and `valueSpan` of a `VariableBinding`
in a microsyntax expression to `ParsedVariable`, and subsequently to
View Engine Variable AST and Ivy Variable AST.
Note that this commit does not propagate the `keySpan`, because it involves
significant changes to the template AST.
PR Close#36047
Today, the language service infers the type of variables bound to the
"ngIf" template context member of an NgIf directive, but does not do the
same for the the "$implicit" context member. This commit adds support
for that.
Fixes https://github.com/angular/vscode-ng-language-service/issues/676
PR Close#35941
This commit adds fine-grained text spans to TemplateBinding for microsyntax expressions.
1. Source span
By convention, source span refers to the entire span of the binding,
including its key and value.
2. Key span
Span of the binding key, without any whitespace or keywords like `let`
The value span is captured by the value expression AST.
This is part of a series of PRs to fix source span mapping in microsyntax expression.
For more info, see the doc https://docs.google.com/document/d/1mEVF2pSSMSnOloqOPQTYNiAJO0XQxA1H0BZyESASOrE/edit?usp=sharing
PR Close#35897
This commit adds support in the Angular monorepo and in the Angular
compiler(s) for TypeScript 3.8. All packages can now compile with
TS 3.8.
For most of the repo, only a handful few typings adjustments were needed:
* TS 3.8 has a new `CustomElementConstructor` DOM type, which enforces a
zero-argument constructor. The `NgElementConstructor` type previously
declared a required `injector` argument despite the fact that its
implementation allowed `injector` to be optional. The interface type was
updated to reflect the optionality of the argument.
* Certain error messages were changed, and expectations in tests were
updated as a result.
* tsserver (part of language server) now returns performance information in
responses, so test expectations were changed to only assert on the actual
body content of responses.
For compiler-cli and schematics (which use the TypeScript AST) a major
breaking change was the introduction of the export form:
```typescript
export * as foo from 'bar';
```
This is a `ts.NamespaceExport`, and the `exportClause` of a
`ts.ExportDeclaration` can now take this type as well as `ts.NamedExports`.
This broke a lot of places where `exportClause` was assumed to be
`ts.NamedExports`.
For the most part these breakages were in cases where it is not necessary
to handle the new `ts.NamedExports` anyway. ngtsc's design uses the
`ts.TypeChecker` APIs to understand syntax and so automatically supports the
new form of exports.
The View Engine compiler on the other hand extracts TS structures into
metadata.json files, and that format was not designed for namespaced
exports. As a result it will take a nontrivial amount of work if we want to
support such exports in View Engine. For now, these new exports are not
accounted for in metadata.json, and so using them in "folded" Angular
expressions will result in errors (probably claiming that the referenced
exported namespace doesn't exist).
Care was taken to only use TS APIs which are present in 3.7/3.6, as Angular
needs to remain compatible with these for the time being.
This commit does not update angular.io.
PR Close#35864
This commit accomplishes two tasks:
- Fixes the span of queried pipes to only be applied on pipe names
- By consequence, fixes how pipes are located in arguments (previously,
pipes with arguments could not be found because the span of a pipe
uses a relative span, while the template position is absolute)
The screenshots attached to the PR for this commit demonstrate the
change.
Closes https://github.com/angular/vscode-ng-language-service/issues/677
PR Close#35986
The test libs should only be included in one jasmine_node_test
otherwise `bazel build //packages/language-service/...` would
end up running `feature_test` and `infra_test` twice.
PR Close#35816
This commit performs a modularization of the Language Service's existing
diagnostic messages. Such a modularization has two primary advantages:
- Centralization and decoupling of error messages from the code that
generates them makes it easy to add/delete/edit diagnostic messages,
and allows for independent iteration of diagnostic messages and
diagnostic generation.
- Prepares for additional features like annotating the locations where a
diagnostic is generated and enabling the configuration of which
diagnostics should be reported by the language service.
Although it would be preferable to place the diagnostics registry in an
independent JSON file, for ease of typing diagnostic types as an enum
variant of 'ts.DiagnosticCategory', the registry is stored as an object.
Part of #32663.
PR Close#35678
This commit differentiates language service feature and language service
infrastructure tests. This is primarily to make testing of different
components at the development level easier. This commit continues a
small effort to expand our test coverage and normalize testing
structure.
Also adds test coverage to language service tests. We have quite a bit
to go on that front 🙂.
PR Close#35688
This commit normalizes hover and util tests in the language service.
This is part of a small effort to simplify and normalize the language
service testing structure, which currently contains specs that are
largely created and left without relation to other tests.
PR Close#35656
For example, '<div><p string-model~{cursor}></p></div>', when provide the hover info for 'string-model', the 'path.head' is root tag 'div'. Use the parent of 'path.tail' instead.
PR Close#35317
I think the bug is introduced in my PR#34847. For example, 'model="{{title}}"', the attribute value cannot be parsed by 'parseTemplateBindings'.
PR Close#35494
The completions list don't include the 'ngTemplateOutlet'. The directive is a structural directive when it has injected the 'TemplateRef' or 'ViewContainerRef'.
PR Close#35466
Under strict mode, the language service fails to typecheck nullable
symbols that have already been verified to be non-null.
This generates incorrect (false positive) and confusing diagnostics
for users.
To work around this issue in the short term, this commit changes the
diagnostic message from an error to a suggestion, and prompts users to
use the safe navigation operator (?) or non-null assertion operator (!).
For example, instead of
```typescript
{{ optional && optional.toString() }}
```
the following is cleaner:
```typescript
{{ optional?.toString() }}
{{ optional!.toString() }}
```
Note that with this change, users who legitimately make a typo in their
code will no longer see an error. I think this is acceptable, since
false positive is worse than false negative. However, if users follow
the suggestion, add ? or ! to their code, then the error will be surfaced.
This seems a reasonable trade-off.
References:
1. Safe navigation operator (?)
https://angular.io/guide/template-syntax#the-safe-navigation-operator----and-null-property-paths
2. Non-null assertion operator (!)
https://angular.io/guide/template-syntax#the-non-null-assertion-operator---
PR closes https://github.com/angular/angular/pull/35070
PR closes https://github.com/angular/vscode-ng-language-service/issues/589
PR Close#35200
The language service reports an error when a directive's template
context is missing a member that is being used in a template (e.g. if
`$implicit` is being used with a template context typed as `any`).
While this diagnostic message is valuable, typing template contexts
loosely as `any` or `object` is very widespread in community packages,
and often still compiles correctly, so reporting the diagnostic as an
error may be misleading to users.
This commit changes the diagnostic to be a warning, and adds additional
information about how the user can eliminate the warning entirely -- by
refining the template context type.
Closes https://github.com/angular/vscode-ng-language-service/issues/572
PR Close#35036
Sometimes, a request for definitions will return multiple of the same
definition. This can happen in at least the cases of
- two-way bindings (one of the same definition for the property and
event binding)
- multiple template binding expressions in the same attribute
- something like "*ngFor="let i of items; trackBy: test" has two
template bindings, resulting in two template binding ASTs at the
same location (the attribute span). The language service then parses
both of these bindings individually, resulting in two independent
but identical definitions. For more context, see https://github.com/angular/angular/pull/34847#discussion_r371006680.
This commit prunes duplicate definitions by signing definitions with
their location, and checking if that location signature has been seen in
a previous definition returned to the client.
PR Close#34995
This commit adds support for completions of properties on `$event`
variables in bound outputs.
This is the second major PR to support completions for `$event`
variables (https://github.com/angular/vscode-ng-language-service/issues/531).
The final completion support that must be provided is for `$event`
variables in bindings targeting DOM events, like `(click)`.
PR Close#34570
For the structural directive, the 'path' will contain multiple `BoundDirectivePropertyAst` which depends on the number of directive property in the attribute value(e.g. '*ngFor="let item of []; trackBy: test;"', it has 2 `BoundDirectivePropertyAst`, 'ngForOf' and 'ngForTrackBy').
PR Close#34847
As part of the effort to tighten the API surface of
`TypeScriptServiceHost` in preparation for the migration to Ivy, I realized
some recently added APIs are not strictly needed.
They can be safely removed without sacrificing functionality.
This allows us to clean up the code, especially in the implementation of
QuickInfo, where the `TypeScriptServiceHost` is leaked outside of the
`LanguageService` class.
This refactoring also cleans up some duplicate code where the QuickInfo
object is generated. The logic is now consolidated into a simple
`createQuickInfo` method shared across two different implementations.
PR Close#34941
Right now, if an Angular diagnostic is generated for a TypeScript node,
the span points to the decorator Identifier, i.e. the Identifier node
like `@NgModule`, `@Component`, etc.
This is weird. It should point to the class name instead.
Note, we do not have a more fine-grained breakdown of the span when
diagnostics are emitted, this work remains to be done.
PR Close#34932
This commit elaborates diagnostics produced for invalid template
contexts by including the name of the embedded template type using the
template context, and in the common case that the implicity property is
being referenced (e.g. in a `for .. of ..` expression), suggesting to
refine the type of the context. This suggestion is provided because
users will sometimes use a base class as the type of the context in the
embedded view, and a more specific context later on (e.g. in an
`ngOnChanges` method).
Closes https://github.com/angular/vscode-ng-language-service/issues/251
PR Close#34751
This commit adds a regression test to check that the language service
recognizes inputs and outputs declared in a directive decorator.
See #34874.
PR Close#34875
In Angular, symbol can have multiple definitions (e.g. a two-way
binding). This commit adds support for for multiple definitions for a
queried location in a template.
PR Close#34782
This commit makes the Angular Language Service interface a strict subset
of TypeScript's Language Service by renaming all methods to be
consistent with TypeScript's.
The custom Angular `LanguageService` interface was needed before the
inception of TypeScript tsserver plugin, but is now obsolete since
Angular LS is a proper tsserver plugin.
This allows us to easily adapt to upstream TS changes in the future, and
also allows us to reuse all data types defined in TypeScript.
PR Close#34888
Keen Yee Liau
Ayaz Hafiz
JiaLiPassion
ivanwonder
Keen Yee Liau
ayazhafiz
Alex Rickabaugh
Pusztai Tibor
Paul Gschwendtner