fix some tests

packages/svelte/messages/compile-errors/css.md

@@ -44,7 +44,7 @@ Invalid selector
 
 ## invalid_css_identifier
 
-TODO
+Expected a valid CSS identifier
 
 ## invalid_nesting_selector
 
@@ -52,4 +52,4 @@ Nesting selectors can only be used inside a rule
 
 ## invalid_css_declaration
 
-TODO
+TODO

packages/svelte/messages/compile-errors/parse.md

@@ -1,6 +1,6 @@
 ## unclosed_element
 
-%name% was left open
+`<%name%>` was left open
 
 ## unclosed_block
 

packages/svelte/messages/compile-errors/runes.md

@@ -56,11 +56,11 @@ Cannot export derived state from a module. To expose the current derived value,
 
 ## invalid_assignment
 
-Cannot assign to `%thing%`
+Cannot assign to %thing%
 
 ## invalid_binding
 
-Cannot bind to `%thing%`
+Cannot bind to %thing%
 
 ## invalid_rune_args
 

packages/svelte/src/compiler/errors.js

@@ -418,7 +418,7 @@ export function invalid_css_selector(node) {
  * @returns {never}
  */
 export function invalid_css_identifier(node) {
-	e(node, "invalid_css_identifier", "TODO");
+	e(node, "invalid_css_identifier", "Expected a valid CSS identifier");
 }
 
 /**
@@ -518,7 +518,7 @@ export function cyclical_reactive_declaration(node, cycle) {
  * @returns {never}
  */
 export function unclosed_element(node, name) {
-	e(node, "unclosed_element", `${name} was left open`);
+	e(node, "unclosed_element", `\`<${name}>\` was left open`);
 }
 
 /**
@@ -981,7 +981,7 @@ export function invalid_host_location(node) {
  * @returns {never}
  */
 export function invalid_assignment(node, thing) {
-	e(node, "invalid_assignment", `Cannot assign to \`${thing}\``);
+	e(node, "invalid_assignment", `Cannot assign to ${thing}`);
 }
 
 /**
@@ -990,7 +990,7 @@ export function invalid_assignment(node, thing) {
  * @returns {never}
  */
 export function invalid_binding(node, thing) {
-	e(node, "invalid_binding", `Cannot bind to \`${thing}\``);
+	e(node, "invalid_binding", `Cannot bind to ${thing}`);
 }
 
 /**

packages/svelte/src/compiler/phases/1-parse/index.js

@@ -92,7 +92,7 @@ export class Parser {
 
 			if (current.type === 'RegularElement') {
 				current.end = current.start + 1;
-				e.unclosed_element(current, `<${current.name}>`);
+				e.unclosed_element(current, current.name);
 			} else {
 				current.end = current.start + 1;
 				e.unclosed_block(current);

packages/svelte/src/compiler/phases/1-parse/state/element.js

@@ -677,7 +677,7 @@ function read_attribute_value(parser) {
 			'in attribute value'
 		);
 	} catch (/** @type {any} */ error) {
-		if (error.code === 'js-parse-error') {
+		if (error.code === 'js_parse_error') {
 			// if the attribute value didn't close + self-closing tag
 			// eg: `<Component test={{a:1} />`
 			// acorn may throw a `Unterminated regular expression` because of `/>`
@@ -687,7 +687,7 @@ function read_attribute_value(parser) {
 				e.unclosed_attribute_value(pos, quote_mark || '}');
 			}
 		}
-		throw e;
+		throw error;
 	}
 
 	if (value.length === 0 && !quote_mark) {

packages/svelte/src/compiler/phases/2-analyze/validation.js

@@ -1023,10 +1023,13 @@ function validate_no_const_assignment(node, argument, scope, is_binding) {
 			// 		(binding.kind !== 'normal' || !binding.initial)
 			// );
 
+			// TODO have a more specific error message for assignments to things like `{:then foo}`
+			const thing = 'constant';
+
 			if (is_binding) {
-				e.invalid_binding(node, 'TODO');
+				e.invalid_binding(node, thing);
 			} else {
-				e.invalid_assignment(node, 'TODO');
+				e.invalid_assignment(node, thing);
 			}
 		}
 	}

packages/svelte/tests/compiler-errors/samples/attribute-empty/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'missing-attribute-value',
+		code: 'missing_attribute_value',
 		message: 'Expected attribute value',
 		position: [12, 12]
 	}

packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression-2/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-sequence-expression',
+		code: 'invalid_sequence_expression',
 		message:
 			'Sequence expressions are not allowed as attribute/directive values in runes mode, unless wrapped in parentheses',
 		position: [124, 131]

packages/svelte/tests/compiler-errors/samples/attribute-sequence-expression/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-sequence-expression',
+		code: 'invalid_sequence_expression',
 		message:
 			'Sequence expressions are not allowed as attribute/directive values in runes mode, unless wrapped in parentheses',
 		position: [163, 170]

packages/svelte/tests/compiler-errors/samples/attribute-unique-binding/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-attribute',
+		code: 'duplicate_attribute',
 		message: 'Attributes need to be unique',
 		position: [17, 17]
 	}

packages/svelte/tests/compiler-errors/samples/attribute-unique-shorthand/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-attribute',
+		code: 'duplicate_attribute',
 		message: 'Attributes need to be unique',
 		position: [17, 17]
 	}

packages/svelte/tests/compiler-errors/samples/attribute-unique/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-attribute',
+		code: 'duplicate_attribute',
 		message: 'Attributes need to be unique',
 		position: [17, 17]
 	}

packages/svelte/tests/compiler-errors/samples/catch-before-closing/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token {:else}',
 		position: [35, 35]
 	}

packages/svelte/tests/compiler-errors/samples/catch-without-await/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [1, 1]

packages/svelte/tests/compiler-errors/samples/class-state-field-static/_config.js

@@ -2,8 +2,9 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-location',
-		message: '$state(...) can only be used as a variable declaration initializer or a class field',
+		code: 'invalid_state_location',
+		message:
+			'`$state(...)` can only be used as a variable declaration initializer or a class field',
 		position: [33, 41]
 	}
 });

packages/svelte/tests/compiler-errors/samples/comment-unclosed/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unexpected-eof',
-		message: 'Unexpected end of input (expected -->)',
+		code: 'expected_token',
+		message: 'Expected token -->',
 		position: [24, 24]
 	}
 });

packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-2/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });

packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-3/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });

packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-4/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-default-slot-content',
+		code: 'invalid_default_slot_content',
 		message: 'Found default slot content alongside an explicit slot="default"'
 	}
 });

packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-5/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });

packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error-6/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });

packages/svelte/tests/compiler-errors/samples/component-slot-duplicate-error/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-slot-name',
+		code: 'duplicate_slot_name',
 		message: "Duplicate slot name 'foo' in <Nested>"
 	}
 });

packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-2/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-slot-placement',
+		code: 'invalid_slot_placement',
 		message:
 			"Element with a slot='...' attribute must be a child of a component or a descendant of a custom element"
 	}

packages/svelte/tests/compiler-errors/samples/component-slot-nested-error-3/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-slot-placement',
+		code: 'invalid_slot_placement',
 		message:
 			"Element with a slot='...' attribute must be a child of a component or a descendant of a custom element"
 	}

packages/svelte/tests/compiler-errors/samples/component-slot-nested-error/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-slot-placement',
+		code: 'invalid_slot_placement',
 		message:
 			"Element with a slot='...' attribute must be a child of a component or a descendant of a custom element"
 	}

packages/svelte/tests/compiler-errors/samples/css-global-block-combinator/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-global-block-combinator',
+		code: 'invalid_css_global_block_combinator',
 		message: 'A :global {...} block cannot follow a > combinator',
 		position: [12, 21]
 	}

packages/svelte/tests/compiler-errors/samples/css-global-block-declaration/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-global-block-declaration',
+		code: 'invalid_css_global_block_declaration',
 		message: 'A :global {...} block can only contain rules, not declarations',
 		position: [24, 34]
 	}

packages/svelte/tests/compiler-errors/samples/css-global-block-modifier/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-global-block-modifier',
+		code: 'invalid_css_global_block_modifier',
 		message: 'A :global {...} block cannot modify an existing selector',
 		position: [14, 21]
 	}

packages/svelte/tests/compiler-errors/samples/css-global-block-multiple/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-global-block-list',
+		code: 'invalid_css_global_block_list',
 		message: 'A :global {...} block cannot be part of a selector list with more than one item',
 		position: [9, 31]
 	}

packages/svelte/tests/compiler-errors/samples/css/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-identifier',
+		code: 'invalid_css_identifier',
 		message: 'Expected a valid CSS identifier',
 		position: [25, 25]
 	}

packages/svelte/tests/compiler-errors/samples/dollar-binding-declaration/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-dollar-binding',
+		code: 'invalid_dollar_binding',
 		message: 'The $ name is reserved, and cannot be used for variables and imports'
 	}
 });

packages/svelte/tests/compiler-errors/samples/dollar-binding-global-js/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-global',
+		code: 'illegal_global',
 		message:
-			'$ is an illegal variable name. To reference a global variable called $, use globalThis.$'
+			'`$` is an illegal variable name. To reference a global variable called `$`, use `globalThis.$`'
 	}
 });

packages/svelte/tests/compiler-errors/samples/dollar-binding-global/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-global',
+		code: 'illegal_global',
 		message:
-			'$ is an illegal variable name. To reference a global variable called $, use globalThis.$'
+			'`$` is an illegal variable name. To reference a global variable called `$`, use `globalThis.$`'
 	}
 });

packages/svelte/tests/compiler-errors/samples/dollar-binding-import/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-dollar-binding',
+		code: 'invalid_dollar_binding',
 		message: 'The $ name is reserved, and cannot be used for variables and imports'
 	}
 });

packages/svelte/tests/compiler-errors/samples/dynamic-element-binding-invalid/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-binding',
-		message: "'value' binding can only be used with <input>, <textarea>, <select>"
+		code: 'bind_invalid_target',
+		message: '`bind:value` can only be used with <input>, <textarea>, <select>'
 	}
 });

packages/svelte/tests/compiler-errors/samples/else-before-closing-2/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token {:then ...} or {:catch ...}',
 		position: [24, 24]
 	}

packages/svelte/tests/compiler-errors/samples/else-before-closing-3/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [6, 6]

packages/svelte/tests/compiler-errors/samples/else-before-closing/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [18, 18]

packages/svelte/tests/compiler-errors/samples/else-if-before-closing-2/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-continuing-block-placement',
+		code: 'invalid_continuing_block_placement',
 		message:
 			'{:...} block is invalid at this position (did you forget to close the preceeding element or block?)',
 		position: [17, 17]

packages/svelte/tests/compiler-errors/samples/else-if-before-closing/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token {:then ...} or {:catch ...}',
 		position: [26, 26]
 	}

packages/svelte/tests/compiler-errors/samples/else-if-without-if/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token {:then ...} or {:catch ...}',
 		position: [27, 27]
 	}

packages/svelte/tests/compiler-errors/samples/empty-attribute-shorthand/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'empty-attribute-shorthand',
+		code: 'empty_attribute_shorthand',
 		message: 'Attribute shorthand cannot be empty',
 		position: [6, 6]
 	}

packages/svelte/tests/compiler-errors/samples/empty-classname-binding/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'empty-directive-name',
+		code: 'empty_directive_name',
 		message: 'ClassDirective name cannot be empty',
 		position: [10, 10]
 	}

packages/svelte/tests/compiler-errors/samples/empty-directive-name/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'empty-directive-name',
+		code: 'empty_directive_name',
 		message: 'UseDirective name cannot be empty',
 		position: [8, 8]
 	}

packages/svelte/tests/compiler-errors/samples/export-derived-state/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-export',
+		code: 'invalid_derived_export',
 		message:
 			'Cannot export derived state from a module. To expose the current derived value, export a function returning its value',
 		position: [24, 66]

packages/svelte/tests/compiler-errors/samples/export-state-module/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-export',
+		code: 'invalid_state_export',
 		message:
 			"Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties",
 		position: [76, 114]

packages/svelte/tests/compiler-errors/samples/export-state/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-export',
+		code: 'invalid_state_export',
 		message:
 			"Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties",
 		position: [46, 86]

packages/svelte/tests/compiler-errors/samples/illegal-expression/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'js-parse-error',
+		code: 'js_parse_error',
 		message: 'Assigning to rvalue',
 		position: [1, 1]
 	}

packages/svelte/tests/compiler-errors/samples/invalid-snippet-binding/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-snippet-assignment',
+		code: 'invalid_snippet_assignment',
 		message: 'Cannot reassign or bind to snippet parameter'
 	}
 });

packages/svelte/tests/compiler-errors/samples/invalid-snippet-mutation/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-snippet-assignment',
+		code: 'invalid_snippet_assignment',
 		message: 'Cannot reassign or bind to snippet parameter'
 	}
 });

packages/svelte/tests/compiler-errors/samples/legacy-no-const-assignment/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-const-assignment',
-		message: 'Invalid assignment to const variable'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to constant'
 	}
 });

packages/svelte/tests/compiler-errors/samples/legacy-no-const-update/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-const-assignment',
-		message: 'Invalid assignment to const variable'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to constant'
 	}
 });

packages/svelte/tests/compiler-errors/samples/multiple-styles/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-style-element',
-		message: 'A component can have a single top-level <style> element',
+		code: 'duplicate_style_element',
+		message: 'A component can have a single top-level `<style>` element',
 		position: [58, 58]
 	}
 });

packages/svelte/tests/compiler-errors/samples/options-children/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-element-content',
+		code: 'invalid_element_content',
 		message: '<svelte:options> cannot have children',
 		position: [16, 16]
 	}

packages/svelte/tests/compiler-errors/samples/raw-mustaches-whitespace/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'missing-whitespace',
+		code: 'missing_whitespace',
 		message: 'Expected whitespace',
 		position: [6, 6]
 	}

packages/svelte/tests/compiler-errors/samples/render-tag-invalid-call/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-render-call',
+		code: 'invalid_render_call',
 		message: 'Calling a snippet function using apply, bind or call is not allowed'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-before-after-update/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-runes-mode-import',
+		code: 'invalid_runes_mode_import',
 		message: 'beforeUpdate cannot be used in runes mode'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-duplicate-props/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'duplicate-props-rune',
-		message: 'Cannot use $props() more than once'
+		code: 'duplicate_props_rune',
+		message: 'Cannot use `$props()` more than once'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-export-let/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-legacy-export',
+		code: 'invalid_legacy_export',
 		message: 'Cannot use `export let` in runes mode — use $props instead'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-export-named-state/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-export',
+		code: 'invalid_state_export',
 		message:
 			"Cannot export state from a module if it is reassigned. Either export a function returning the state value or only mutate the state value's properties",
 		position: [28, 53]

packages/svelte/tests/compiler-errors/samples/runes-invalid-each-binding/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-each-assignment',
+		code: 'invalid_each_assignment',
 		message:
-			"Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. 'array[i] = value' instead of 'entry = value')"
+			'Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. `array[i] = value` instead of `entry = value`)'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-invalid-each-mutation/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-each-assignment',
+		code: 'invalid_each_assignment',
 		message:
-			"Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. 'array[i] = value' instead of 'entry = value')"
+			'Cannot reassign or bind to each block argument in runes mode. Use the array and index variables instead (e.g. `array[i] = value` instead of `entry = value`)'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-no-const-assignment/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-const-assignment',
-		message: 'Invalid assignment to const variable'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to constant'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-no-const-update/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-const-assignment',
-		message: 'Invalid assignment to const variable'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to constant'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-no-derived-assignment/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-assignment',
-		message: 'Invalid assignment to derived state'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to derived state'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-no-derived-binding/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-binding',
-		message: 'Invalid binding to derived state'
+		code: 'invalid_binding',
+		message: 'Cannot bind to derived state'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-assignment/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-assignment',
-		message: 'Invalid assignment to derived state'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to derived state'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-no-derived-state-field-update/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-assignment',
-		message: 'Invalid assignment to derived state'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to derived state'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-no-derived-update/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-derived-assignment',
-		message: 'Invalid assignment to derived state'
+		code: 'invalid_assignment',
+		message: 'Cannot assign to derived state'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-no-rune-each/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-location',
-		message: '$state(...) can only be used as a variable declaration initializer or a class field'
+		code: 'invalid_state_location',
+		message: '`$state(...)` can only be used as a variable declaration initializer or a class field'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-prop-export-conflict/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'conflicting-property-name',
+		code: 'conflicting_property_name',
 		message: 'Cannot have a property and a component export with the same name'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-args/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$bindable can only be called with 0 or 1 arguments'
+		code: 'invalid_rune_args_length',
+		message: '`$bindable` must be called with zero or one arguments'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-bindable-placement/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-bindable-location',
-		message: '$bindable() can only be used inside a $props() declaration'
+		code: 'invalid_bindable_location',
+		message: '`$bindable()` can only be used inside a `$props()` declaration'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-args/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$derived can only be called with 1 argument'
+		code: 'invalid_rune_args_length',
+		message: '`$derived` must be called with exactly one argument'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-derived-placement/_config.js

@@ -2,7 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-location',
-		message: '$derived(...) can only be used as a variable declaration initializer or a class field'
+		code: 'invalid_state_location',
+		message:
+			'`$derived(...)` can only be used as a variable declaration initializer or a class field'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-args/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$effect can only be called with 1 argument'
+		code: 'invalid_rune_args_length',
+		message: '`$effect` must be called with exactly one argument'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-effect-placement/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-effect-location',
-		message: '$effect() can only be used as an expression statement'
+		code: 'invalid_effect_location',
+		message: '`$effect()` can only be used as an expression statement'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-host-placement/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-host-location',
-		message: '$host() can only be used inside custom element component instances'
+		code: 'invalid_host_location',
+		message: '`$host()` can only be used inside custom element component instances'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-props-args/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$props can only be called with 0 arguments'
+		code: 'invalid_rune_args',
+		message: '`$props` cannot be called with arguments'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-props-placement/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-props-location',
+		code: 'invalid_props_location',
 		message:
-			'$props() can only be used at the top level of components as a variable declaration initializer'
+			'`$props()` can only be used at the top level of components as a variable declaration initializer'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-state-args/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$state can only be called with 0 or 1 arguments'
+		code: 'invalid_rune_args_length',
+		message: '`$state` must be called with zero or one arguments'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-state-placement/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-state-location',
-		message: '$state(...) can only be used as a variable declaration initializer or a class field'
+		code: 'invalid_state_location',
+		message: '`$state(...)` can only be used as a variable declaration initializer or a class field'
 	}
 });

packages/svelte/tests/compiler-errors/samples/runes-wrong-state-snapshot-args/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-rune-args-length',
-		message: '$state.snapshot can only be called with 1 argument'
+		code: 'invalid_rune_args_length',
+		message: '`$state.snapshot` must be called with exactly one argument'
 	}
 });

packages/svelte/tests/compiler-errors/samples/script-unclosed-eof/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unexpected-eof',
+		code: 'unexpected_eof',
 		message: 'Unexpected end of input',
 		position: [32, 32]
 	}

packages/svelte/tests/compiler-errors/samples/script-unclosed/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'unclosed-element',
-		message: '<script> was left open',
+		code: 'unclosed_element',
+		message: '`<script>` was left open',
 		position: [32, 32]
 	}
 });

packages/svelte/tests/compiler-errors/samples/self-reference/_config.js

@@ -2,9 +2,9 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-self-placement',
+		code: 'invalid_self_placement',
 		message:
-			'<svelte:self> components can only exist inside {#if} blocks, {#each} blocks, {#snippet} blocks or slots passed to components',
+			'`<svelte:self>` components can only exist inside {#if} blocks, {#each} blocks, {#snippet} blocks or slots passed to components',
 		position: [1, 1]
 	}
 });

packages/svelte/tests/compiler-errors/samples/slot-conflicting-with-render-tag/_config.js

@@ -2,9 +2,9 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'conflicting-slot-usage',
+		code: 'conflicting_slot_usage',
 		message:
-			'Cannot use <slot> syntax and {@render ...} tags in the same component. Migrate towards {@render ...} tags completely.',
+			'Cannot use `<slot>` syntax and `{@render ...}` tags in the same component. Migrate towards `{@render ...}` tags completely.',
 		position: [71, 84]
 	}
 });

packages/svelte/tests/compiler-errors/samples/snippet-children-conflict/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'conflicting-children-snippet',
+		code: 'conflicting_children_snippet',
 		message:
 			'Cannot use explicit children snippet at the same time as implicit children content. Remove either the non-whitespace content or the children snippet block',
 		position: [320, 353]

packages/svelte/tests/compiler-errors/samples/store-autosub-context-module/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-subscription',
-		message: 'Cannot reference store value inside <script context="module">',
+		code: 'illegal_subscription',
+		message: 'Cannot reference store value inside `<script context="module">`',
 		position: [164, 168]
 	}
 });

packages/svelte/tests/compiler-errors/samples/store-contextual/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component'
 	}
 });

packages/svelte/tests/compiler-errors/samples/store-global-disallowed/_config.js

@@ -2,8 +2,8 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-global',
+		code: 'illegal_global',
 		message:
-			'$foo is an illegal variable name. To reference a global variable called $foo, use globalThis.$foo'
+			'`$foo` is an illegal variable name. To reference a global variable called `$foo`, use `globalThis.$foo`'
 	}
 });

packages/svelte/tests/compiler-errors/samples/store-prevent-user-declarations/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-dollar-prefix',
+		code: 'invalid_dollar_prefix',
 		message: 'The $ prefix is reserved, and cannot be used for variables and imports'
 	}
 });

packages/svelte/tests/compiler-errors/samples/store-shadow-scope-2/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component',
 		position: [142, 147]
 	}

packages/svelte/tests/compiler-errors/samples/store-shadow-scope-3/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component',
 		position: [167, 172]
 	}

packages/svelte/tests/compiler-errors/samples/store-shadow-scope/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component'
 	}
 });

packages/svelte/tests/compiler-errors/samples/store-template-expression-scope/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'illegal-store-subscription',
+		code: 'illegal_store_subscription',
 		message: 'Cannot subscribe to stores that are not declared at the top level of the component'
 	}
 });

packages/svelte/tests/compiler-errors/samples/style-unclosed-eof/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'expected-token',
+		code: 'expected_token',
 		message: 'Expected token </style',
 		position: [31, 31]
 	}

packages/svelte/tests/compiler-errors/samples/style-unclosed/_config.js

@@ -2,7 +2,7 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-css-identifier',
+		code: 'invalid_css_identifier',
 		message: 'Expected a valid CSS identifier',
 		position: [9, 9]
 	}

packages/svelte/tests/compiler-errors/samples/svelte-selfdestructive/_config.js

@@ -2,9 +2,9 @@ import { test } from '../../test';
 
 export default test({
 	error: {
-		code: 'invalid-svelte-tag',
+		code: 'invalid_svelte_tag',
 		message:
-			'Valid <svelte:...> tag names are svelte:head, svelte:options, svelte:window, svelte:document, svelte:body, svelte:element, svelte:component, svelte:self or svelte:fragment',
+			'Valid `<svelte:...>` tag names are svelte:head, svelte:options, svelte:window, svelte:document, svelte:body, svelte:element, svelte:component, svelte:self or svelte:fragment',
 		position: [10, 10]
 	}
 });