refactor(prettier): Update tasks/prettier to correctly handle snapsho…

…ts (#8337)

I refactored the code in `tasks/prettier_conformance` primarily to make
the output more readable when using `--filter`.

But I also discovered that our previous implementation did not correctly
handle Prettier's behavior of adding a blank line at the EOF.

In addition, I resolved a problem where test specs that used patterns
like `runFormatTest(_, parsers)` were unable to locate the correct
snapshot output.

As a result, compatibility has also improved slightly. 😉

---------

Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

crates/oxc_prettier/src/format/js.rs

@@ -33,8 +33,7 @@ impl<'a> Format<'a> for Program<'a> {
 
             if let Some(body_doc) = block::print_block_body(p, &self.body, Some(&self.directives)) {
                 parts.push(body_doc);
-                // XXX: Prettier seems to add this, but test results don't match
-                // parts.extend(hardline!());
+                parts.extend(hardline!());
             }
 
             array!(p, parts)

crates/oxc_prettier/src/format/print/block.rs

@@ -48,6 +48,7 @@ pub fn print_block<'a>(
     array!(p, parts)
 }
 
+/// For `Program` only
 pub fn print_block_body<'a>(
     p: &mut Prettier<'a>,
     stmts: &[Statement<'a>],

tasks/prettier_conformance/Cargo.toml

@@ -30,6 +30,7 @@ oxc_prettier = { workspace = true }
 oxc_span = { workspace = true }
 oxc_tasks_common = { workspace = true }
 
+cow-utils = { workspace = true }
 pico-args = { workspace = true }
 rustc-hash = { workspace = true }
 walkdir = { workspace = true }

tasks/prettier_conformance/snapshots/prettier.js.snap.md

@@ -1,4 +1,4 @@
-js compatibility: 246/641 (38.38%)
+js compatibility: 249/641 (38.85%)
 
 # Failed
 
@@ -220,9 +220,6 @@ js compatibility: 246/641 (38.38%)
 * js/empty-paren-comment/class.js
 * js/empty-paren-comment/empty_paren_comment.js
 
-### js/end-of-line
-* js/end-of-line/example.js
-
 ### js/export
 * js/export/blank-line-between-specifiers.js
 * js/export/same-local-and-exported.js
@@ -566,10 +563,8 @@ js compatibility: 246/641 (38.38%)
 * jsx/jsx/quotes.js
 * jsx/jsx/regex.js
 * jsx/jsx/return-statement.js
-* jsx/jsx/self-closing.js
 * jsx/jsx/spacing.js
 * jsx/jsx/template-literal-in-attr.js
-* jsx/jsx/ternary.js
 
 ### jsx/last-line
 * jsx/last-line/last_line.js
@@ -603,4 +598,4 @@ js compatibility: 246/641 (38.38%)
 * jsx/stateless-arrow-fn/test.js
 
 ### jsx/text-wrap
-* jsx/text-wrap/test.js
+* jsx/text-wrap/test.js

tasks/prettier_conformance/snapshots/prettier.ts.snap.md

@@ -1,4 +1,4 @@
-ts compatibility: 190/568 (33.45%)
+ts compatibility: 193/568 (33.98%)
 
 # Failed
 
@@ -54,10 +54,8 @@ ts compatibility: 190/568 (33.45%)
 * jsx/jsx/quotes.js
 * jsx/jsx/regex.js
 * jsx/jsx/return-statement.js
-* jsx/jsx/self-closing.js
 * jsx/jsx/spacing.js
 * jsx/jsx/template-literal-in-attr.js
-* jsx/jsx/ternary.js
 
 ### jsx/last-line
 * jsx/last-line/last_line.js
@@ -230,9 +228,6 @@ ts compatibility: 190/568 (33.45%)
 * typescript/conformance/classes/mixinClassesMembers.ts
 * typescript/conformance/classes/nestedClassDeclaration.ts
 
-### typescript/conformance/classes/classDeclarations/classAbstractKeyword
-* typescript/conformance/classes/classDeclarations/classAbstractKeyword/classAbstractWithInterface.ts
-
 ### typescript/conformance/classes/classDeclarations/classHeritageSpecification
 * typescript/conformance/classes/classDeclarations/classHeritageSpecification/classExtendsItselfIndirectly.ts
 
@@ -654,4 +649,4 @@ ts compatibility: 190/568 (33.45%)
 * typescript/update-expression/update-expressions.ts
 
 ### typescript/webhost
-* typescript/webhost/webtsc.ts
+* typescript/webhost/webtsc.ts