[regexp] Expand test coverage for sequence properties

Port the remaining tests from:
https://chromium-review.googlesource.com/c/v8/v8/+/1227974/1/test/mjsunit/harmony/regexp-property-emoji-flag-sequence-generated.js#9

Bug: v8:7467
Change-Id: Ib187c93cb38befbbba31bdf93a0f5d8f1bee3d13
Reviewed-on: https://chromium-review.googlesource.com/1230098Reviewed-by: Mathias Bynens <mathias@chromium.org>
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Mathias Bynens <mathias@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56083}

test/mjsunit/harmony/regexp-property-sequence.js

@@ -9,13 +9,13 @@ assertDoesNotThrow("/\\p{Emoji_Flag_Sequence}/u");
 assertTrue(/\p{Emoji_Flag_Sequence}/u.test("\u{1F1E9}\u{1F1EA}"));
 
 assertDoesNotThrow("/\\p{Emoji_Keycap_Sequence}/u");
-assertTrue(/\p{Emoji_Keycap_Sequence}/u.test("\u0023\ufe0f\u20e3"));
+assertTrue(/\p{Emoji_Keycap_Sequence}/u.test("\u0023\uFE0F\u20E3"));
 
 assertDoesNotThrow("/\\p{Emoji_Keycap_Sequence}/u");
-assertFalse(/\p{Emoji_Keycap_Sequence}/u.test("\u0022\ufe0f\u20e3"));
+assertFalse(/\p{Emoji_Keycap_Sequence}/u.test("\u0022\uFE0F\u20E3"));
 
 assertDoesNotThrow("/\\p{Emoji_Modifier_Sequence}/u");
-assertTrue(/\p{Emoji_Modifier_Sequence}/u.test("\u26f9\u{1f3ff}"));
+assertTrue(/\p{Emoji_Modifier_Sequence}/u.test("\u26F9\u{1F3FF}"));
 
 assertDoesNotThrow("/\\p{Emoji_ZWJ_Sequence}/u");
 assertTrue(/\p{Emoji_ZWJ_Sequence}/u.test("\u{1F468}\u{200D}\u{1F467}"));
@@ -27,10 +27,34 @@ assertTrue(/\p{Emoji_Flag_Sequence}/.test("\\p{Emoji_Flag_Sequence}"));
 
 // Negated and/or inside a character class.
 assertThrows("/\\P{Emoji_Flag_Sequence}/u");
+assertThrows("/\\P{Emoji_Keycap_Sequence}/u");
+assertThrows("/\\P{Emoji_Modifier_Sequence}/u");
+assertThrows("/\\P{Emoji_Tag_Sequence}/u");
+assertThrows("/\\P{Emoji_ZWJ_Sequence}/u");
+
 assertThrows("/[\\p{Emoji_Flag_Sequence}]/u");
+assertThrows("/[\\p{Emoji_Keycap_Sequence}]/u");
+assertThrows("/[\\p{Emoji_Modifier_Sequence}]/u");
+assertThrows("/[\\p{Emoji_Tag_Sequence}]/u");
+assertThrows("/[\\p{Emoji_ZWJ_Sequence}]/u");
+
 assertThrows("/[\\P{Emoji_Flag_Sequence}]/u");
+assertThrows("/[\\P{Emoji_Keycap_Sequence}]/u");
+assertThrows("/[\\P{Emoji_Modifier_Sequence}]/u");
+assertThrows("/[\\P{Emoji_Tag_Sequence}]/u");
+assertThrows("/[\\P{Emoji_ZWJ_Sequence}]/u");
+
 assertThrows("/[\\w\\p{Emoji_Flag_Sequence}]/u");
+assertThrows("/[\\w\\p{Emoji_Keycap_Sequence}]/u");
+assertThrows("/[\\w\\p{Emoji_Modifier_Sequence}]/u");
+assertThrows("/[\\w\\p{Emoji_Tag_Sequence}]/u");
+assertThrows("/[\\w\\p{Emoji_ZWJ_Sequence}]/u");
+
 assertThrows("/[\\w\\P{Emoji_Flag_Sequence}]/u");
+assertThrows("/[\\w\\P{Emoji_Keycap_Sequence}]/u");
+assertThrows("/[\\w\\P{Emoji_Modifier_Sequence}]/u");
+assertThrows("/[\\w\\P{Emoji_Tag_Sequence}]/u");
+assertThrows("/[\\w\\P{Emoji_ZWJ_Sequence}]/u");
 
 // Two regional indicators, but not a country.
 assertFalse(/\p{Emoji_Flag_Sequence}/u.test("\u{1F1E6}\u{1F1E6}"));
@@ -42,16 +66,23 @@ assertFalse(/\p{Emoji_ZWJ_Sequence}/u.test("\u{1F467}\u{200D}\u{1F468}"));
 assertEquals(
     ["country flag: \u{1F1E6}\u{1F1F9}"],
     /Country Flag: \p{Emoji_Flag_Sequence}/iu.exec(
-        "this is an example of a country flag: \u{1F1E6}\u{1F1F9} is Austra"));
+        "this is an example of a country flag: \u{1F1E6}\u{1F1F9} is Austria"));
 assertEquals(
     ["country flag: \u{1F1E6}\u{1F1F9}", "\u{1F1E6}\u{1F1F9}"],
     /Country Flag: (\p{Emoji_Flag_Sequence})/iu.exec(
-        "this is an example of a country flag: \u{1F1E6}\u{1F1F9} is Austra"));
+        "this is an example of a country flag: \u{1F1E6}\u{1F1F9} is Austria"));
 assertEquals(
     ["country flag: \u{1F1E6}\u{1F1F9}"],
     /Country Flag: ..(?<=\p{Emoji_Flag_Sequence})/iu.exec(
-        "this is an example of a country flag: \u{1F1E6}\u{1F1F9} is Austra"));
+        "this is an example of a country flag: \u{1F1E6}\u{1F1F9} is Austria"));
 assertEquals(
     ["flag: \u{1F1E6}\u{1F1F9}", "\u{1F1E6}\u{1F1F9}"],
     /Flag: ..(?<=(\p{Emoji_Flag_Sequence})|\p{Emoji_Keycap_Sequence})/iu.exec(
-        "this is an example of a country flag: \u{1F1E6}\u{1F1F9} is Austra"));
+        "this is an example of a country flag: \u{1F1E6}\u{1F1F9} is Austria"));
+
+// Partial sequences.
+assertFalse(/\p{Emoji_Flag_Sequence}/u.test("\u{1F1E6}_"));
+assertFalse(/\p{Emoji_Keycap_Sequence}/u.test("2\uFE0F_"));
+assertFalse(/\p{Emoji_Modifier_Sequence}/u.test("\u261D_"));
+assertFalse(/\p{Emoji_Tag_Sequence}/u.test("\u{1F3F4}\u{E0067}\u{E0062}\u{E0065}\u{E006E}\u{E0067}_"));
+assertFalse(/\p{Emoji_ZWJ_Sequence}/u.test("\u{1F468}\u200D\u2764\uFE0F\u200D_"));