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patch 9.1.0099: Not able to use diff() with 'diffexpr'

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Problem:  Not able to use diff() with 'diffexpr'
          (rickhowe, after v9.1.0096)
Solution: Use a default context length of 0, update diff() help text,
          add a test for using diff() with 'diffexpr'
          (Yegappan Lakshmanan)

closes: #14013

Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
Yegappan Lakshmanan
2024-02-12 20:21:26 +01:00
committed by Christian Brabandt
parent 6d91227267
commit a0010a186d
7 changed files with 77 additions and 24 deletions
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65
src/testdir/test_diffmode.vim
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@@ -1719,43 +1719,43 @@ endfunc
set nodiff
endfunc
" Test for the diff() function
" Test for the diff() function
def Test_diff_func()
# string is added/removed/modified at the beginning
assert_equal("@@ -0,0 +1 @@\n+abc\n",
diff(['def'], ['abc', 'def'], {output: 'unified'}))
diff(['def'], ['abc', 'def'], {output: 'unified'}))
assert_equal([{from_idx: 0, from_count: 0, to_idx: 0, to_count: 1}],
diff(['def'], ['abc', 'def'], {output: 'indices'}))
assert_equal("@@ -1 +0,0 @@\n-abc\n",
diff(['abc', 'def'], ['def'], {output: 'unified'}))
diff(['abc', 'def'], ['def'], {output: 'unified'}))
assert_equal([{from_idx: 0, from_count: 1, to_idx: 0, to_count: 0}],
diff(['abc', 'def'], ['def'], {output: 'indices'}))
assert_equal("@@ -1 +1 @@\n-abc\n+abx\n",
diff(['abc', 'def'], ['abx', 'def'], {output: 'unified'}))
assert_equal([{from_idx: 0, from_count: 1, to_idx: 0, to_count: 1}],
diff(['abc', 'def'], ['abx', 'def'], {output: 'indices'}))
diff(['abc', 'def'], ['abx', 'def'], {output: 'indices'}))
# string is added/removed/modified at the end
assert_equal("@@ -1,0 +2 @@\n+def\n",
diff(['abc'], ['abc', 'def'], {output: 'unified'}))
diff(['abc'], ['abc', 'def'], {output: 'unified'}))
assert_equal([{from_idx: 1, from_count: 0, to_idx: 1, to_count: 1}],
diff(['abc'], ['abc', 'def'], {output: 'indices'}))
assert_equal("@@ -2 +1,0 @@\n-def\n",
diff(['abc', 'def'], ['abc'], {output: 'unified'}))
diff(['abc', 'def'], ['abc'], {output: 'unified'}))
assert_equal([{from_idx: 1, from_count: 1, to_idx: 1, to_count: 0}],
diff(['abc', 'def'], ['abc'], {output: 'indices'}))
assert_equal("@@ -2 +2 @@\n-def\n+xef\n",
diff(['abc', 'def'], ['abc', 'xef'], {output: 'unified'}))
assert_equal([{from_idx: 1, from_count: 1, to_idx: 1, to_count: 1}],
diff(['abc', 'def'], ['abc', 'xef'], {output: 'indices'}))
diff(['abc', 'def'], ['abc', 'xef'], {output: 'indices'}))
# string is added/removed/modified in the middle
assert_equal("@@ -2,0 +3 @@\n+xxx\n",
diff(['111', '222', '333'], ['111', '222', 'xxx', '333'], {output: 'unified'}))
diff(['111', '222', '333'], ['111', '222', 'xxx', '333'], {output: 'unified'}))
assert_equal([{from_idx: 2, from_count: 0, to_idx: 2, to_count: 1}],
diff(['111', '222', '333'], ['111', '222', 'xxx', '333'], {output: 'indices'}))
assert_equal("@@ -3 +2,0 @@\n-333\n",
diff(['111', '222', '333', '444'], ['111', '222', '444'], {output: 'unified'}))
diff(['111', '222', '333', '444'], ['111', '222', '444'], {output: 'unified'}))
assert_equal([{from_idx: 2, from_count: 1, to_idx: 2, to_count: 0}],
diff(['111', '222', '333', '444'], ['111', '222', '444'], {output: 'indices'}))
assert_equal("@@ -3 +3 @@\n-333\n+xxx\n",
@@ -1795,10 +1795,12 @@ def Test_diff_func()
assert_equal([{from_idx: 0, from_count: 1, to_idx: 0, to_count: 1}],
diff(['abc'], ['abcd'], {output: 'indices'}))
assert_equal("@@ -1 +1 @@\n-abcd\n+abc\n",
diff(['abcd'], ['abc'], {output: 'unified'}))
assert_equal([{from_idx: 0, from_count: 1, to_idx: 0, to_count: 1}],
diff(['abcd'], ['abc'], {output: 'unified'}))
assert_equal([{from_idx: 0, from_count: 1, to_idx: 0, to_count: 1}],
diff(['abcd'], ['abc'], {output: 'indices'}))
var diff_unified: string = diff(['abc'], ['abx'], {output: 'unified'})
assert_equal("@@ -1 +1 @@\n-abc\n+abx\n", diff_unified)
assert_equal("@@ -1 +1 @@\n-abc\n+abx\n",
var diff_indices: list<dict<number>> =
diff(['abc'], ['abx'], {output: 'indices'})
assert_equal([{from_idx: 0, from_count: 1, to_idx: 0, to_count: 1}],
diff_indices)
@@ -1825,17 +1827,18 @@ def Test_diff_func()
END
tolist =<< trim END
one abc two
three four
three four
five six
END
END
assert_equal("@@ -1 +1 @@\n-one two\n+one abc two\n@@ -3 +3 @@\n-five abc six\n+five six\n",
diff(fromlist, tolist, {output: 'unified'}))
assert_equal([{'from_count': 1, 'to_idx': 0, 'to_count': 1, 'from_idx': 0},
{'from_count': 1, 'to_idx': 2, 'to_count': 1, 'from_idx': 2}],
diff(fromlist, tolist, {output: 'indices'}))
diff(fromlist, tolist, {output: 'indices'}))
# add/remove blank lines
assert_equal("@@ -2,2 +1,0 @@\n-\n-\n",
diff(['one', '', '', 'two'], ['one', 'two'], {output: 'unified'}))
diff(['one', '', '', 'two'], ['one', 'two'], {output: 'unified'}))
assert_equal([{from_idx: 1, from_count: 2, to_idx: 1, to_count: 0}],
diff(['one', '', '', 'two'], ['one', 'two'], {output: 'indices'}))
assert_equal("@@ -1,0 +2,2 @@\n+\n+\n",
@@ -1911,7 +1914,7 @@ def Test_diff_func()
assert_equal("@@ -1,2 +1,3 @@\n+x\n a\n b\n",
diff(['a', 'b', 'c'], ['x', 'a', 'b', 'c'], {context: 2}))
assert_equal("@@ -1,3 +1,4 @@\n+x\n a\n b\n c\n",
diff(['a', 'b', 'c'], ['x', 'a', 'b', 'c'], {context: 3}))
diff(['a', 'b', 'c'], ['x', 'a', 'b', 'c'], {context: 3}))
assert_equal("@@ -1,3 +1,4 @@\n+x\n a\n b\n c\n",
diff(['a', 'b', 'c'], ['x', 'a', 'b', 'c'], {context: 4}))
assert_equal("@@ -0,0 +1 @@\n+x\n",
@@ -1922,4 +1925,32 @@ def Test_diff_func()
assert_fails('call diff(["a"], {})', 'E1211:')
assert_fails('call diff(["a"], ["a"], [])', 'E1206:')
assert_fails('call diff(["a"], ["a"], {output: "xyz"})', 'E106: Unsupported diff output format: xyz')
assert_fails('call diff(["a"], ["a"], {context: []})', 'E745: Using a List as a Number')
enddef
" Test for using the diff() function with 'diffexpr'
func Test_diffexpr_with_diff_func()
CheckScreendump
let lines =<< trim END
def DiffFuncExpr()
var in: list<string> = readfile(v:fname_in)
var new: list<string> = readfile(v:fname_new)
var out: string = diff(in, new)
writefile(split(out, "\n"), v:fname_out)
enddef
set diffexpr=DiffFuncExpr()
edit Xdifffunc1.txt
diffthis
vert split Xdifffunc2.txt
diffthis
END
call writefile(lines, 'XsetupDiffFunc.vim', 'D')
call writefile(['zero', 'one', 'two', 'three'], 'Xdifffunc1.txt', 'D')
call writefile(['one', 'twox', 'three', 'four'], 'Xdifffunc2.txt', 'D')
let buf = RunVimInTerminal('-S XsetupDiffFunc.vim', {'rows': 12})
call VerifyScreenDump(buf, 'Test_difffunc_diffexpr_1', {})
call StopVimInTerminal(buf)