Add tests for LineContinuation in StringLiteral

test/language/literals/string/line-continuation-double.js

@@ -0,0 +1,60 @@
+// Copyright (C) 2018 Richard Gibson. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-literals-string-literals
+description: >
+  Line terminators may occur within string literals as part of a |LineContinuation|
+  to produce the empty code points sequence.
+info: |
+  11.8.4 String Literals
+
+  StringLiteral ::
+    `"` DoubleStringCharacters? `"`
+    `'` SingleStringCharacters? `'`
+
+  DoubleStringCharacters ::
+    DoubleStringCharacter DoubleStringCharacters?
+
+  DoubleStringCharacter ::
+    SourceCharacter but not one of `"` or `\` or LineTerminator
+    <LS>
+    <PS>
+    `\` EscapeSequence
+    LineContinuation
+
+  LineContinuation ::
+    `\` LineTerminatorSequence
+
+  11.3 Line Terminators
+
+  LineTerminatorSequence ::
+    <LF>
+    <CR> [lookahead != <LF>]
+    <LS>
+    <PS>
+    <CR> <LF>
+
+  11.8.4.2 Static Semantics: SV
+
+  The SV of DoubleStringCharacter :: LineContinuation is the empty code unit sequence.
+---*/
+
+// LineTerminatorSequence :: <LF>
+assert.sameValue("\
+", "");
+
+// LineTerminatorSequence :: <CR> [lookahead ≠ <LF>]
+assert.sameValue("\
", "");
+
+// LineTerminatorSequence :: <LS>
+// <LS> is U+2028 LINE SEPARATOR; UTF8(0x2028) = 0xE2 0x80 0xA8
+assert.sameValue("\
", "");
+
+// LineTerminatorSequence :: <PS>
+// <PS> is U+2029 PARAGRAPH SEPARATOR; UTF8(0x2029) = 0xE2 0x80 0xA9
+assert.sameValue("\
", "");
+
+// LineTerminatorSequence :: <CR> <LF>
+assert.sameValue("\
+", "");

test/language/literals/string/line-continuation-single.js

@@ -0,0 +1,60 @@
+// Copyright (C) 2018 Richard Gibson. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-literals-string-literals
+description: >
+  Line terminators may occur within string literals as part of a |LineContinuation|
+  to produce the empty code points sequence.
+info: |
+  11.8.4 String Literals
+
+  StringLiteral ::
+    `"` DoubleStringCharacters? `"`
+    `'` SingleStringCharacters? `'`
+
+  SingleStringCharacters ::
+    SingleStringCharacter SingleStringCharacters?
+
+  SingleStringCharacter ::
+    SourceCharacter but not one of `'` or `\` or LineTerminator
+    <LS>
+    <PS>
+    `\` EscapeSequence
+    LineContinuation
+
+  LineContinuation ::
+    `\` LineTerminatorSequence
+
+  11.3 Line Terminators
+
+  LineTerminatorSequence ::
+    <LF>
+    <CR> [lookahead != <LF>]
+    <LS>
+    <PS>
+    <CR> <LF>
+
+  11.8.4.2 Static Semantics: SV
+
+  The SV of SingleStringCharacter :: LineContinuation is the empty code unit sequence.
+---*/
+
+// LineTerminatorSequence :: <LF>
+assert.sameValue('\
+', '');
+
+// LineTerminatorSequence :: <CR> [lookahead ≠ <LF>]
+assert.sameValue('\
', '');
+
+// LineTerminatorSequence :: <LS>
+// <LS> is U+2028 LINE SEPARATOR; UTF8(0x2028) = 0xE2 0x80 0xA8
+assert.sameValue('\
', '');
+
+// LineTerminatorSequence :: <PS>
+// <PS> is U+2029 PARAGRAPH SEPARATOR; UTF8(0x2029) = 0xE2 0x80 0xA9
+assert.sameValue('\
', '');
+
+// LineTerminatorSequence :: <CR> <LF>
+assert.sameValue('\
+', '');