Do not access Buffer::m_changes to find the inserted range, return
it directly from Buffer::insert and Buffer::replace. This fixes a
wrong behaviour where replacing at eof would lose the selected end
of line (as the implementation does not actually replace that end
of line)
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Regression test
===============
:unified-context-diff: https://en.wikipedia.org/wiki/Diff#Unified_format
Source structure
----------------
----------------------------------------------
.
├── unit
│ └── …
└── compose
└── …
├── [rc] → configuration
├── cmd → command
├── [in] → start file
├── [ui-in] → start UI state in JSON format
├── [out] → end file
├── [ui-out] → output UI state in JSON format
├── [selections] → selection contents
├── [state] → selection states
└── [error] → error bypass
----------------------------------------------
Usage
-----
To test, just type +run [test]+ in the +test+ directory.
It will print each passing test. If a test fails, a {unified-context-diff}[unified context diff]
is printed showing the test’s expected output and the actual output.
Details
-------
+rc+ is optional
and should contain a sequence of commands,
_e.g._, +set-option+, +define-command+, +declare-option+.
+rc+ is sourced and evaluated before the +cmd+ key sequence is executed.
+cmd+ is required
and should contain a key sequence that will edit the input buffer.
+cmd+ is executed after the +rc+ command sequence is sourced.
+in+ is optional
and should contain the initial text loaded into the input buffer
for editing by the +cmd+ key sequence.
+ui-in+ is optional
and should contain the json-rpc commands sent by the UI at startup.
+out+ is optional
and should contain the expected text generated by the +cmd+ key sequence.
+ui-out+ is optional
and should contain the expected UI JSON output.
+selections+ is optional
and should contain the expected value of +$kak_selections+
(_i.e._, content of the selection separated by colons).
+state+ is optional
and should contain the expected value of +$kak_selections_desc+
(_i.e._, range of the selections separated by colons).
If the actual +output+ text, +selections+, +state+, or +ui-out+
does not match the expected content in the corresponding file,
the unit test will fail.
If there is no +output+, +selections+, +state+, or +ui-out+ file,
then the unit test will always succeed.
If there is an +error+ file, which could be empty,
then the unit test will always fail.
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