Make DOMSelection cache Range

third_party/WebKit/LayoutTests/external/wpt/selection/extend-00-expected.txt

 CONSOLE ERROR: line 944: The given range isn't in document.
 CONSOLE ERROR: line 944: The given range isn't in document.
 CONSOLE ERROR: line 944: The given range isn't in document.
 CONSOLE ERROR: line 944: The given range isn't in document.
 CONSOLE ERROR: line 944: The given range isn't in document.
 CONSOLE ERROR: line 944: The given range isn't in document.
 CONSOLE ERROR: line 944: The given range isn't in document.
 CONSOLE ERROR: line 944: The given range isn't in document.
 CONSOLE ERROR: line 944: The given range isn't in document.
 CONSOLE ERROR: line 944: The given range isn't in document.
@@ skipping 510 matching lines @@
 FAIL extend() with range 0 [] and point 85 [doctype, 1] assert_throws: extend() when rangeCount is 0 must throw InvalidStateError function "function () {
             selection.extend(node, offset);
         }" threw object "IndexSizeError: Failed to execute 'extend' on 'Selection': 1 is larger than the given node's length." that is not a DOMException INVALID_STATE_ERR: property "code" is equal to 1, expected 11
 FAIL extend() with range 0 [] and point 86 [foreignDoctype, 0] assert_throws: extend() when rangeCount is 0 must throw InvalidStateError function "function () {
             selection.extend(node, offset);
         }" did not throw
 FAIL extend() with range 0 [] and point 87 [xmlDoctype, 0] assert_throws: extend() when rangeCount is 0 must throw InvalidStateError function "function () {
             selection.extend(node, offset);
         }" did not throw
 PASS extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 0 [paras[0].firstChild, -1] 
-PASS extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 1 [paras[0].firstChild, 0] 
+FAIL extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 1 [paras[0].firstChild, 0] assert_not_equals: extend() must replace any existing range with a new one, not mutate the existing one got disallowed value object ""

[tkent, 2017/02/08 00:38:24]

PASS->FAIL in extend-00.html are not regressions, but a defect of this CL causes
them.

Now we pass these tests because Selection.getRangeAt() always returns new Range.
With this CL, DOMSelection::extend() needs to clear DOMSelection::m_range,
however it seems it doesn't happen.  Due to early-return in
DOMSelection::extend() or FrameSelection::setSelectionAlgorithm()?

 FAIL extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 2 [paras[0].firstChild, 1] assert_equals: focusOffset must be the offset passed to extend() expected 1 but got 2
 PASS extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 3 [paras[0].firstChild, 2] 
 PASS extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 4 [paras[0].firstChild, 8] 
 FAIL extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 5 [paras[0].firstChild, 9] assert_equals: focusOffset must be the offset passed to extend() expected 9 but got 10
 PASS extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 6 [paras[0].firstChild, 10] 
 PASS extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 7 [paras[0].firstChild, 65535] 
 PASS extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 8 [paras[1].firstChild, -1] 
 FAIL extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 9 [paras[1].firstChild, 0] assert_equals: focusNode must be the node passed to extend() expected Text node "Ijklmnop
 " but got Element node <p id="c">Qrstuvwx</p>
 FAIL extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 10 [paras[1].firstChild, 1] assert_equals: focusNode must be the node passed to extend() expected Text node "Ijklmnop
@@ skipping 145 matching lines @@
         }" did not throw
 FAIL extend() with range 1 [paras[0].firstChild, 0, paras[0].firstChild, 0] and point 87 [xmlDoctype, 0] assert_throws: extend() to a doctype must throw InvalidNodeTypeError function "function () {
             selection.extend(node, offset);
         }" did not throw
 PASS extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 0 [paras[0].firstChild, -1] 
 FAIL extend() backwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 0 [paras[0].firstChild, -1] assert_equals: Sanity check: endOffset must be correct expected 1 but got 2
 PASS extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 1 [paras[0].firstChild, 0] 
 FAIL extend() backwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 1 [paras[0].firstChild, 0] assert_equals: Sanity check: endOffset must be correct expected 1 but got 2
 FAIL extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 2 [paras[0].firstChild, 1] assert_equals: focusOffset must be the offset passed to extend() expected 1 but got 2
 FAIL extend() backwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 2 [paras[0].firstChild, 1] assert_equals: Sanity check: endOffset must be correct expected 1 but got 2
-PASS extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 3 [paras[0].firstChild, 2] 
+FAIL extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 3 [paras[0].firstChild, 2] assert_not_equals: extend() must replace any existing range with a new one, not mutate the existing one got disallowed value object "A"
 FAIL extend() backwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 3 [paras[0].firstChild, 2] assert_equals: Sanity check: endOffset must be correct expected 1 but got 2
 PASS extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 4 [paras[0].firstChild, 8] 
 FAIL extend() backwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 4 [paras[0].firstChild, 8] assert_equals: Sanity check: endOffset must be correct expected 1 but got 2
 FAIL extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 5 [paras[0].firstChild, 9] assert_equals: focusOffset must be the offset passed to extend() expected 9 but got 10
 FAIL extend() backwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 5 [paras[0].firstChild, 9] assert_equals: Sanity check: endOffset must be correct expected 1 but got 2
 PASS extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 6 [paras[0].firstChild, 10] 
 FAIL extend() backwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 6 [paras[0].firstChild, 10] assert_equals: Sanity check: endOffset must be correct expected 1 but got 2
 PASS extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 7 [paras[0].firstChild, 65535] 
 FAIL extend() backwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 7 [paras[0].firstChild, 65535] assert_equals: Sanity check: endOffset must be correct expected 1 but got 2
 PASS extend() forwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 8 [paras[1].firstChild, -1] 
@@ skipping 229 matching lines @@
             selection.extend(node, offset);
         }" did not throw
 FAIL extend() backwards with range 2 [paras[0].firstChild, 0, paras[0].firstChild, 1] and point 87 [xmlDoctype, 0] assert_equals: Sanity check: endOffset must be correct expected 1 but got 2
 PASS extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 0 [paras[0].firstChild, -1] 
 PASS extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 0 [paras[0].firstChild, -1] 
 PASS extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 1 [paras[0].firstChild, 0] 
 PASS extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 1 [paras[0].firstChild, 0] 
 FAIL extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 2 [paras[0].firstChild, 1] assert_equals: focusOffset must be the offset passed to extend() expected 1 but got 2
 FAIL extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 2 [paras[0].firstChild, 1] assert_equals: focusOffset must be the offset passed to extend() expected 1 but got 2
 PASS extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 3 [paras[0].firstChild, 2] 
-PASS extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 3 [paras[0].firstChild, 2] 
-PASS extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 4 [paras[0].firstChild, 8] 
+FAIL extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 3 [paras[0].firstChild, 2] assert_not_equals: extend() must replace any existing range with a new one, not mutate the existing one got disallowed value object "b̈c̈d̈"
+FAIL extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 4 [paras[0].firstChild, 8] assert_not_equals: extend() must replace any existing range with a new one, not mutate the existing one got disallowed value object "b̈c̈d̈"
 PASS extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 4 [paras[0].firstChild, 8] 
 FAIL extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 5 [paras[0].firstChild, 9] assert_equals: focusOffset must be the offset passed to extend() expected 9 but got 10
 FAIL extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 5 [paras[0].firstChild, 9] assert_equals: focusOffset must be the offset passed to extend() expected 9 but got 10
 PASS extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 6 [paras[0].firstChild, 10] 
 PASS extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 6 [paras[0].firstChild, 10] 
 PASS extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 7 [paras[0].firstChild, 65535] 
 PASS extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 7 [paras[0].firstChild, 65535] 
 PASS extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 8 [paras[1].firstChild, -1] 
 PASS extend() backwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 8 [paras[1].firstChild, -1] 
 FAIL extend() forwards with range 3 [paras[0].firstChild, 2, paras[0].firstChild, 8] and point 9 [paras[1].firstChild, 0] assert_equals: focusNode must be the node passed to extend() expected Text node "Ijklmnop
@@ skipping 305 matching lines @@
 PASS extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 1 [paras[0].firstChild, 0] 
 FAIL extend() backwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 1 [paras[0].firstChild, 0] assert_equals: Sanity check: endOffset must be correct expected 9 but got 10
 FAIL extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 2 [paras[0].firstChild, 1] assert_equals: focusOffset must be the offset passed to extend() expected 1 but got 2
 FAIL extend() backwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 2 [paras[0].firstChild, 1] assert_equals: Sanity check: endOffset must be correct expected 9 but got 10
 PASS extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 3 [paras[0].firstChild, 2] 
 FAIL extend() backwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 3 [paras[0].firstChild, 2] assert_equals: Sanity check: endOffset must be correct expected 9 but got 10
 PASS extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 4 [paras[0].firstChild, 8] 
 FAIL extend() backwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 4 [paras[0].firstChild, 8] assert_equals: Sanity check: endOffset must be correct expected 9 but got 10
 FAIL extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 5 [paras[0].firstChild, 9] assert_equals: focusOffset must be the offset passed to extend() expected 9 but got 10
 FAIL extend() backwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 5 [paras[0].firstChild, 9] assert_equals: Sanity check: endOffset must be correct expected 9 but got 10
-PASS extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 6 [paras[0].firstChild, 10] 
+FAIL extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 6 [paras[0].firstChild, 10] assert_not_equals: extend() must replace any existing range with a new one, not mutate the existing one got disallowed value object "b̈c̈d̈e"
 FAIL extend() backwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 6 [paras[0].firstChild, 10] assert_equals: Sanity check: endOffset must be correct expected 9 but got 10
 PASS extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 7 [paras[0].firstChild, 65535] 
 FAIL extend() backwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 7 [paras[0].firstChild, 65535] assert_equals: Sanity check: endOffset must be correct expected 9 but got 10
 PASS extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 8 [paras[1].firstChild, -1] 
 FAIL extend() backwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 8 [paras[1].firstChild, -1] assert_equals: Sanity check: endOffset must be correct expected 9 but got 10
 FAIL extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 9 [paras[1].firstChild, 0] assert_equals: focusNode must be the node passed to extend() expected Text node "Ijklmnop
 " but got Element node <p id="c">Qrstuvwx</p>
 FAIL extend() backwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 9 [paras[1].firstChild, 0] assert_equals: Sanity check: endOffset must be correct expected 9 but got 10
 FAIL extend() forwards with range 4 [paras[0].firstChild, 2, paras[0].firstChild, 9] and point 10 [paras[1].firstChild, 1] assert_equals: focusNode must be the node passed to extend() expected Text node "Ijklmnop
 " but got Element node <p id="c">Qrstuvwx</p>
@@ skipping 2060 matching lines @@
 FAIL extend() forwards with range 14 [foreignPara1.firstChild, 2, foreignPara1.firstChild, 8] and point 85 [doctype, 1] assert_equals: Sanity check: rangeCount must be correct expected 1 but got 0
 FAIL extend() backwards with range 14 [foreignPara1.firstChild, 2, foreignPara1.firstChild, 8] and point 85 [doctype, 1] assert_equals: Sanity check: rangeCount must be correct expected 1 but got 0
 FAIL extend() forwards with range 14 [foreignPara1.firstChild, 2, foreignPara1.firstChild, 8] and point 86 [foreignDoctype, 0] assert_equals: Sanity check: rangeCount must be correct expected 1 but got 0
 FAIL extend() backwards with range 14 [foreignPara1.firstChild, 2, foreignPara1.firstChild, 8] and point 86 [foreignDoctype, 0] assert_equals: Sanity check: rangeCount must be correct expected 1 but got 0
 FAIL extend() forwards with range 14 [foreignPara1.firstChild, 2, foreignPara1.firstChild, 8] and point 87 [xmlDoctype, 0] assert_equals: Sanity check: rangeCount must be correct expected 1 but got 0
 FAIL extend() backwards with range 14 [foreignPara1.firstChild, 2, foreignPara1.firstChild, 8] and point 87 [xmlDoctype, 0] assert_equals: Sanity check: rangeCount must be correct expected 1 but got 0
 PASS extend() forwards with range 15 [document.documentElement, 0, document.documentElement, 1] and point 0 [paras[0].firstChild, -1] 
 FAIL extend() backwards with range 15 [document.documentElement, 0, document.documentElement, 1] and point 0 [paras[0].firstChild, -1] assert_equals: Sanity check: startContainer must be correct expected Element node <html><head><title>Selection extend() tests</title>
 <meta... but got Text node "Äb̈c̈d̈ëf̈g̈ḧ
 "
-PASS extend() forwards with range 15 [document.documentElement, 0, document.documentElement, 1] and point 1 [paras[0].firstChild, 0] 
+FAIL extend() forwards with range 15 [document.documentElement, 0, document.documentElement, 1] and point 1 [paras[0].firstChild, 0] assert_not_equals: extend() must replace any existing range with a new one, not mutate the existing one got disallowed value object "Selection extend() tests
+
+
+"
 FAIL extend() backwards with range 15 [document.documentElement, 0, document.documentElement, 1] and point 1 [paras[0].firstChild, 0] assert_equals: Sanity check: startContainer must be correct expected Element node <html><head><title>Selection extend() tests</title>
 <meta... but got Text node "Äb̈c̈d̈ëf̈g̈ḧ
 "
 FAIL extend() forwards with range 15 [document.documentElement, 0, document.documentElement, 1] and point 2 [paras[0].firstChild, 1] assert_equals: focusOffset must be the offset passed to extend() expected 1 but got 2
 FAIL extend() backwards with range 15 [document.documentElement, 0, document.documentElement, 1] and point 2 [paras[0].firstChild, 1] assert_equals: Sanity check: startContainer must be correct expected Element node <html><head><title>Selection extend() tests</title>
 <meta... but got Text node "Äb̈c̈d̈ëf̈g̈ḧ
 "
 PASS extend() forwards with range 15 [document.documentElement, 0, document.documentElement, 1] and point 3 [paras[0].firstChild, 2] 
 FAIL extend() backwards with range 15 [document.documentElement, 0, document.documentElement, 1] and point 3 [paras[0].firstChild, 2] assert_equals: Sanity check: startContainer must be correct expected Element node <html><head><title>Selection extend() tests</title>
 <meta... but got Text node "Äb̈c̈d̈ëf̈g̈ḧ
@@ skipping 1251 matching lines @@
 FAIL extend() backwards with range 17 [document.documentElement, 1, document.documentElement, 2] and point 86 [foreignDoctype, 0] assert_equals: Sanity check: startContainer must be correct expected Element node <html><head><title>Selection extend() tests</title>
 <meta... but got Text node "Äb̈c̈d̈ëf̈g̈ḧ
 "
 FAIL extend() forwards with range 17 [document.documentElement, 1, document.documentElement, 2] and point 87 [xmlDoctype, 0] assert_throws: extend() to a doctype must throw InvalidNodeTypeError function "function () {
             selection.extend(node, offset);
         }" did not throw
 FAIL extend() backwards with range 17 [document.documentElement, 1, document.documentElement, 2] and point 87 [xmlDoctype, 0] assert_equals: Sanity check: startContainer must be correct expected Element node <html><head><title>Selection extend() tests</title>
 <meta... but got Text node "Äb̈c̈d̈ëf̈g̈ḧ
 "
 PASS extend() with range 18 [document.head, 1, document.head, 1] and point 0 [paras[0].firstChild, -1] 
-PASS extend() with range 18 [document.head, 1, document.head, 1] and point 1 [paras[0].firstChild, 0] 
+FAIL extend() with range 18 [document.head, 1, document.head, 1] and point 1 [paras[0].firstChild, 0] assert_not_equals: extend() must replace any existing range with a new one, not mutate the existing one got disallowed value object ""
 FAIL extend() with range 18 [document.head, 1, document.head, 1] and point 2 [paras[0].firstChild, 1] assert_equals: focusOffset must be the offset passed to extend() expected 1 but got 2
 PASS extend() with range 18 [document.head, 1, document.head, 1] and point 3 [paras[0].firstChild, 2] 
 PASS extend() with range 18 [document.head, 1, document.head, 1] and point 4 [paras[0].firstChild, 8] 
 FAIL extend() with range 18 [document.head, 1, document.head, 1] and point 5 [paras[0].firstChild, 9] assert_equals: focusOffset must be the offset passed to extend() expected 9 but got 10
 PASS extend() with range 18 [document.head, 1, document.head, 1] and point 6 [paras[0].firstChild, 10] 
 PASS extend() with range 18 [document.head, 1, document.head, 1] and point 7 [paras[0].firstChild, 65535] 
 PASS extend() with range 18 [document.head, 1, document.head, 1] and point 8 [paras[1].firstChild, -1] 
 FAIL extend() with range 18 [document.head, 1, document.head, 1] and point 9 [paras[1].firstChild, 0] assert_equals: focusNode must be the node passed to extend() expected Text node "Ijklmnop
 " but got Element node <p id="c">Qrstuvwx</p>
 FAIL extend() with range 18 [document.head, 1, document.head, 1] and point 10 [paras[1].firstChild, 1] assert_equals: focusNode must be the node passed to extend() expected Text node "Ijklmnop
@@ skipping 566 matching lines @@
 </p><p id... but got Text node "Äb̈c̈d̈ëf̈g̈ḧ
 "
 FAIL extend() forwards with range 19 [document.body, 0, document.body, 1] and point 87 [xmlDoctype, 0] assert_throws: extend() to a doctype must throw InvalidNodeTypeError function "function () {
             selection.extend(node, offset);
         }" did not throw
 FAIL extend() backwards with range 19 [document.body, 0, document.body, 1] and point 87 [xmlDoctype, 0] assert_equals: Sanity check: startContainer must be correct expected Element node <body><div id="test"><p id="a">Äb̈c̈d̈ëf̈g̈ḧ
 </p><p id... but got Text node "Äb̈c̈d̈ëf̈g̈ḧ
 "
 Harness: the test ran to completion.