eb999300d9
Previously the compiler compliance tests ran and built test code with real dependencies on @angular/core and @angular/common. This meant that any changes to the compiler would result in long rebuild processes for tests to rerun. This change removes those dependencies and causes test code to be built against the fake_core stub of @angular/core that the ngtsc tests use. This change also removes the dependency on @angular/common entirely, as locality means it's possible to reference *ngIf without needing to link to an implementation. PR Close #25248 |
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| README.md | ||
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README.md
fake_core is a library designed to expose some of the same symbols as @angular/core, without
requiring compilation of the whole of @angular/core. This enables unit tests for the compiler to
be written without incurring long rebuilds for every change.
@angular/coreis compiled with@angular/compiler-cli, and therefore has an implicit dependency on it. Therefore core must be rebuilt if the compiler changes.- Tests for the compiler which intend to build code that depends on
@angular/coremust have a data dependency on@angular/core. Therefore core must be built to run the compiler tests, and thus rebuilt if the compiler changes.
This rebuild cycle is expensive and slow. fake_core avoids this by exposing a subset of the
@angular/core API, which enables applications to be built by the ngtsc compiler without
needing a full version of core present at compile time.