Class fields test coverage - task list

[xanlpz]

As suggested by @littledan, here is a TODO list proposal with the tests that we should have for the class fields feature. The format is: - [checkbox] Description (asigned to)
Some doubts about this:

• Do we need to test every type of field in every possible combination with methods in class? Seems it would be at least: a field by itself; a field before a method; a field after a method; a field between methods. The V8 tests I looked at seemed satisfied with the first two options only.
• How much information about the spec should there be on each line? And what format to use?

Runtime

• FieldDefinition: LiteralPropertyName Initializer; a = 0; ()
• FieldDefinition: LiteralPropertyName Initializer; LiteralPropertyName; a = 0; b; (@xanlpz)
• FieldDefinition: LiteralPropertyName Initializer; MethodDefinition; a = 0; b() {}; (@xanlpz)
• FieldDefinition: LiteralPropertyName Initializer; GeneratorMethod; a = 0; *b() {}; (@xanlpz)
• FieldDefinition: LiteralPropertyName Initializer; MethodDefinition + ComputedPropertyName; a = 0; 'b' {}; (@xanlpz)
• FieldDefinition: LiteralPropertyName; a; (@xanlpz)
• FieldDefinition: LiteralPropertyName; LiteralPropertyName; a; b; (@xanlpz)
• FieldDefinition: LiteralPropertyName; MethodDefinition; a; b() {}; (@xanlpz)
• FieldDefinition: LiteralPropertyName; GeneratorMethod; a; *b() {}; (@xanlpz)
• FieldDefinition: LiteralPropertyName; MethodDefinition + ComputedPropertyName; a; 'b' {}; (@xanlpz)
• FieldDefinition: ComputedPropertyName Initializer; ['a'] = 0; (@xanlpz)
• FieldDefinition: ComputedPropertyName Initializer; LiteralPropertyName; ['a'] = 0; b; (@xanlpz)
• FieldDefinition: ComputedPropertyName Initializer; MethodDefinition; ['a'] = 0; b() {}; (@xanlpz)
• FieldDefinition: ComputedPropertyName Initializer; GeneratorMethod; ['a'] = 0; *b() {}; (@xanlpz)
• FieldDefinition: ComputedPropertyName Initializer; MethodDefinition + ComputedPropertyName; ['a'] = 0; 'b' {}; (@xanlpz)
• FieldDefinition: ComputedPropertyName; ['a']; (@xanlpz)
• FieldDefinition: ComputedPropertyName; LiteralPropertyName; ['a']; b; (@xanlpz)
• FieldDefinition: ComputedPropertyName; MethodDefinition; ['a']; b() {}; (@xanlpz)
• FieldDefinition: ComputedPropertyName; GeneratorMethod; ['a']; *b() {}; (@xanlpz)
• FieldDefinition: ComputedPropertyName; MethodDefinition + ComputedPropertyName; ['a']; 'b' {}; (@xanlpz)
• FieldDefinition: NumericLiteral Initializer; 0 = 0; (@xanlpz)
• FieldDefinition: NumericLiteral; 0; (@xanlpz)
• FieldDefinition: StringLiteral Initializer; 'a' = 0; (@xanlpz)
• FieldDefinition: StringLiteral; 'a'; (@xanlpz)

Static

• ClassElement: static FieldDefinition; throws SyntaxError if PropName is "prototype". ()
• ClassElement: static FieldDefinition; throws SyntaxError if PropName is "constructor". ()
• ClassElement: FieldDefinition; throws SyntaxError if PropName is "constructor". ()
• ClassElement: PrivateName; throws SyntaxError if PropName is "#constructor". ()

(Initial example, after we agree on a format I will continue adding examples and errors referenced in the spec)

[rwaldron]

I'll be here to review as you work your way through this list.

[littledan]

@xanlpz This format looks good. The only thing is, when you write ['b']() it seems to be rendering as a markdown link. Maybe putting backticks around your code samples will be the easiest way to solve it.

[leobalter]

@xanlpz I'd suggest to assign yourself to smaller parts. I can accept fragmented PRs. This way can also lead someone else to work together on other unassigned features.

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Can we move this content to #1055 and close this issue?

[mroch]

please include tests for super as well! things like

class C extends B { x = () => super() } // SyntaxError
class C extends B { x = () => super.y } // ok I think?
class C extends B { x = super.y } // ???
class C extends B { super } // ok, valid IdentifierName

[leobalter]

Closing this as we got class-fields pretty much well covered.

@mroch those should be covered as well.

[littledan]

Is there a test for multiple public fields of the same name? (The semantics should be that all initializers run, and the second definition clobbers the first; the earlier definition should be visible while intermediate initializers are running.)

[leobalter]

I'll give a check and fix the coverage for this if necessary.

[littledan]

There's been a lot of tests added for class fields; I think we can consider this task complete.