add parser.error coverage

compiler/parse/index.js

@@ -33,8 +33,10 @@ function ParseError ( message, template, index ) {
 		})
 		.join( '\n' );
 
+	this.name = 'ParseError';
 	this.message = `${message} (${line + 1}:${column})\n${frame}`;
-	this.loc = { line, column };
+	this.loc = { line: line + 1, column };
+	this.pos = index;
 	this.shortMessage = message;
 }
 
@@ -123,6 +125,10 @@ export default function parse ( template ) {
 		state = state( parser ) || fragment;
 	}
 
+	if ( state !== fragment || parser.stack.length > 1 ) {
+		parser.error( 'Unexpected end of input' );
+	}
+
 	// trim unnecessary whitespace
 	while ( parser.html.children.length ) {
 		const firstChild = parser.html.children[0];

test/parser/error-unexpected-end-of-input/error.json

@@ -0,0 +1,8 @@
+{
+	"message": "Unexpected end of input",
+	"loc": {
+		"line": 1,
+		"column": 5
+	},
+	"pos": 5
+}

test/parser/error-unexpected-end-of-input/input.html

@@ -0,0 +1 @@
+<div>

test/test.js

@@ -32,10 +32,21 @@ describe( 'svelte', () => {
 
 			( solo ? it.only : it )( dir, () => {
 				const input = fs.readFileSync( `test/parser/${dir}/input.html`, 'utf-8' ).trim();
-				const actual = parse( input );
-				const expected = require( `./parser/${dir}/output.json` );
 
-				assert.deepEqual( actual, expected );
+				try {
+					const actual = parse( input );
+					const expected = require( `./parser/${dir}/output.json` );
+
+					assert.deepEqual( actual, expected );
+				} catch ( err ) {
+					if ( err.name !== 'ParseError' ) throw err;
+
+					const expected = require( `./parser/${dir}/error.json` );
+
+					assert.equal( err.shortMessage, expected.message );
+					assert.deepEqual( err.loc, expected.loc );
+					assert.equal( err.pos, expected.pos );
+				}
 			});
 		});
 	});