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XS: 9.0.2 for the sake of xst, eshost and test262-harness - REBUILD ALL
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Patrick Soquet committed Nov 20, 2019
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64 changes: 38 additions & 26 deletions documentation/xs/XS Conformance.md
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Copyright 2016-2019 Moddable Tech, Inc.

Revised: November 5, 2019
Revised: November 20, 2019

## Caveat

Expand Down Expand Up @@ -67,11 +67,11 @@ After the 6th edition, TC39 adopted a [process](https://tc39.github.io/process-d

The official conformance test suite, [test262](https://github.com/tc39/test262), contains cases for the published specifications, together with cases for proposals at stages 3 and 4, which is great to prepare XS for future editions. The XS harness, `xst` uses adhoc comparisons of the frontmatter `[features]` to skip cases related to not yet implemented proposals. See the skipped cases at the end of this document.

Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) and **99.8%** of the built-ins tests (`29925/29998`). Details are here under. The numbers of skipped cases are between parentheses. The following section lists the failed tests with some explanations.
Currently, on macOS, XS passes **99.8%** of the language tests (`38847/38911`) and **99.8%** of the built-ins tests (`29925/29998`). Details are here under. The numbers of skipped cases are between parentheses. The following section lists the failed tests with some explanations.

### Language

99% 38857/38959 (33) language
99% 38847/38911 (58) language
100% 457/457 arguments-object
100% 40/40 mapped
100% 8/8 unmapped
Expand Down Expand Up @@ -106,7 +106,7 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 139/139 direct
98% 114/116 indirect
100% 3/3 export
99% 18111/18189 (24) expressions
99% 18100/18141 (49) expressions
100% 95/95 addition
100% 104/104 array
100% 617/617 arrow-function
Expand Down Expand Up @@ -154,15 +154,15 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 50/50 gen-method-static
100% 30/30 method
100% 30/30 method-static
17% 8/46 coalesce
0% 0/0 (24) coalesce
100% 11/11 comma
99% 699/701 compound-assignment
100% 10/10 concatenation
95% 40/42 conditional
100% 40/40 (1) conditional
100% 85/85 delete
100% 89/89 division
100% 75/75 does-not-equals
99% 997/999 dynamic-import
99% 994/999 dynamic-import
100% 53/53 assignment-expression
100% 208/208 catch
100% 116/116 namespace
Expand Down Expand Up @@ -246,7 +246,7 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 22/22 rest-parameters
0% 0/2 source-text
100% 160/160 statementList
99% 16463/16480 (9) statements
99% 16464/16480 (9) statements
100% 113/113 async-function
100% 566/566 async-generator
100% 360/360 dstr
Expand Down Expand Up @@ -340,7 +340,7 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 127/127 syntax
100% 127/127 redeclaration
100% 28/28 throw
99% 369/370 try
100% 370/370 try
100% 180/180 dstr
100% 291/291 variable
100% 180/180 dstr
Expand All @@ -359,7 +359,10 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a

### Built-ins

99% 29925/29998 (20) built-ins
99% 29956/30034 (88) built-ins
0% 0/0 (29) AggregateError
0% 0/0 (14) prototype
0% 0/0 (9) errors
99% 5197/5209 Array
100% 8/8 Symbol.species
100% 80/80 from
Expand Down Expand Up @@ -421,7 +424,7 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 32/32 throw
100% 8/8 AsyncIteratorPrototype
100% 8/8 Symbol.asyncIterator
99% 471/472 (7) Atomics
99% 470/472 (7) Atomics
100% 26/26 add
100% 6/6 bigint
100% 26/26 and
Expand All @@ -442,7 +445,7 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 6/6 bigint
100% 26/26 sub
100% 6/6 bigint
99% 137/138 (7) wait
98% 136/138 (7) wait
97% 45/46 (2) bigint
100% 26/26 xor
100% 6/6 bigint
Expand Down Expand Up @@ -538,11 +541,11 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 6/6 message
100% 6/6 name
100% 20/20 toString
98% 132/134 FinalizationGroup
95% 128/134 FinalizationGroup
100% 16/16 FinalizationGroupCleanupIteratorPrototype
100% 86/86 prototype
95% 82/86 prototype
100% 32/32 cleanupSome
100% 30/30 register
86% 26/30 register
100% 16/16 unregister
99% 893/895 Function
100% 16/16 internals
Expand All @@ -565,8 +568,8 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 10/10 Infinity
100% 8/8 IteratorPrototype
100% 8/8 Symbol.iterator
100% 262/262 JSON
100% 124/124 parse
100% 276/276 JSON
100% 138/138 parse
100% 126/126 stringify
100% 286/286 Map
100% 8/8 Symbol.species
Expand Down Expand Up @@ -657,7 +660,7 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 30/30 toPrecision
100% 98/98 toString
100% 20/20 valueOf
100% 6216/6216 Object
100% 6234/6234 Object
100% 52/52 assign
100% 638/638 create
100% 1242/1242 defineProperties
Expand All @@ -667,16 +670,16 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 48/48 fromEntries
100% 614/614 getOwnPropertyDescriptor
100% 30/30 getOwnPropertyDescriptors
100% 74/74 getOwnPropertyNames
100% 8/8 getOwnPropertySymbols
100% 82/82 getOwnPropertyNames
100% 16/16 getOwnPropertySymbols
100% 76/76 getPrototypeOf
100% 12/12 internals
100% 12/12 DefineOwnProperty
100% 40/40 is
100% 74/74 isExtensible
100% 114/114 isFrozen
100% 62/62 isSealed
100% 108/108 keys
100% 110/110 keys
100% 72/72 preventExtensions
100% 338/338 prototype
100% 4/4 constructor
Expand All @@ -700,7 +703,7 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 156/156 race
100% 28/28 reject
100% 58/58 resolve
100% 505/505 Proxy
100% 509/509 Proxy
100% 22/22 apply
100% 52/52 construct
100% 42/42 defineProperty
Expand All @@ -709,12 +712,12 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 32/32 get
100% 36/36 getOwnPropertyDescriptor
100% 32/32 getPrototypeOf
100% 35/35 has
100% 37/37 has
100% 18/18 isExtensible
100% 48/48 ownKeys
100% 18/18 preventExtensions
100% 22/22 revocable
100% 42/42 set
100% 44/44 set
100% 28/28 setPrototypeOf
100% 274/274 Reflect
100% 14/14 apply
Expand Down Expand Up @@ -779,10 +782,10 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
100% 84/84 prototype
100% 18/18 byteLength
100% 62/62 slice
99% 2115/2131 String
99% 2115/2131 (39) String
100% 28/28 fromCharCode
100% 20/20 fromCodePoint
99% 1830/1844 prototype
99% 1830/1844 (39) prototype
100% 10/10 Symbol.iterator
100% 58/58 charAt
100% 48/48 charCodeAt
Expand All @@ -801,6 +804,7 @@ Currently, on macOS, XS passes **99.8%** of the language tests (`38857/38959`) a
91% 22/24 padStart
100% 30/30 repeat
100% 90/90 replace
0% 0/0 (39) replaceAll
100% 70/70 search
100% 70/70 slice
100% 214/214 split
Expand Down Expand Up @@ -1065,6 +1069,11 @@ Test uses Annex B `__lookupGetter__`.
XS optimizes modulus for integer values, which fails for -1 % -1 == -0.

language/expressions/dynamic-import/eval-self-once-module.js
language/expressions/dynamic-import/eval-self-once-script.js

A module cannot dynamically imports itself.

language/expressions/dynamic-import/for-await-resolution-and-error-agen-yield.js

?
Expand Down Expand Up @@ -1149,6 +1158,8 @@ Code points vs code units.
One realm.

built-ins/FinalizationGroup/gc-has-one-chance-to-call-cleanupCallback.js
built-ins/FinalizationGroup/prototype/register/holdings-same-as-target.js
built-ins/FinalizationGroup/prototype/register/unregisterToken-same-as-holdings-and-target.js

?

Expand Down Expand Up @@ -1210,6 +1221,7 @@ Code points vs code units.

### Skipped cases

AggregateError
coalesce-expression
optional-chaining
regexp-match-indices
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2 changes: 1 addition & 1 deletion xs/sources/xsCommon.h
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Expand Up @@ -95,7 +95,7 @@ typedef struct {
#define XS_ATOM_VERSION 0x56455253 /* 'VERS' */
#define XS_MAJOR_VERSION 9
#define XS_MINOR_VERSION 0
#define XS_PATCH_VERSION 1
#define XS_PATCH_VERSION 2

#define XS_DIGEST_SIZE 16
#define XS_VERSION_SIZE 4
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