initial commit

tests/test_parse.py

@@ -0,0 +1,117 @@
+from vdiff import parse
+
+TWO_HUNKS = """diff --git a/x.py b/x.py
+index 111..222 100644
+--- a/x.py
++++ b/x.py
+@@ -1,3 +1,3 @@
+ a
+-b
++B
+ c
+@@ -10,2 +10,3 @@
+ j
++k
+ l
+"""
+
+NO_NEWLINE = """--- a/t.txt
++++ b/t.txt
+@@ -1 +1 @@
+-old
+\\ No newline at end of file
++new
+\\ No newline at end of file
+"""
+
+UNTRACKED = """diff --git a/dev/null b/n.py
+new file mode 100644
+--- /dev/null
++++ b/n.py
+@@ -0,0 +1,2 @@
++one
++two
+"""
+
+DELETED = """--- a/gone.py
++++ /dev/null
+@@ -1,2 +0,0 @@
+-one
+-two
+"""
+
+BINARY = """diff --git a/i.png b/i.png
+index 111..222 100644
+Binary files a/i.png and b/i.png differ
+"""
+
+EMPTY_CONTEXT = """--- a/e.py
++++ b/e.py
+@@ -1,3 +1,3 @@
+ x
+ 
+-\ty
++\tz
+"""
+
+
+def test_two_hunks_numbering():
+    diff = parse.parse_unified(TWO_HUNKS)
+    kinds = [l.kind for l in diff.lines]
+    assert kinds == [" ", "-", "+", " ", " ", "+", " "]
+    assert diff.lines[1] == parse.Line("-", 2, None, "b")
+    assert diff.lines[2] == parse.Line("+", None, 2, "B")
+    assert diff.lines[3] == parse.Line(" ", 3, 3, "c")
+    assert diff.lines[4] == parse.Line(" ", 10, 10, "j")
+    assert diff.lines[5] == parse.Line("+", None, 11, "k")
+    assert diff.lines[6] == parse.Line(" ", 11, 12, "l")
+    assert not diff.binary
+    assert parse.counts(diff.lines) == (2, 1)
+
+
+def test_no_newline_marker_ignored():
+    diff = parse.parse_unified(NO_NEWLINE)
+    assert [l.text for l in diff.lines] == ["old", "new"]
+
+
+def test_untracked_and_deleted_files():
+    new = parse.parse_unified(UNTRACKED)
+    assert [l.new_no for l in new.lines] == [1, 2] and all(l.kind == "+" for l in new.lines)
+    gone = parse.parse_unified(DELETED)
+    assert all(l.kind == "-" for l in gone.lines) and [l.old_no for l in gone.lines] == [1, 2]
+
+
+def test_binary():
+    diff = parse.parse_unified(BINARY)
+    assert diff.binary and diff.lines == []
+
+
+def test_empty_context_line_and_tabs():
+    diff = parse.parse_unified(EMPTY_CONTEXT)
+    assert [l.text for l in diff.lines] == ["x", "", "\ty", "\tz"]
+
+
+def test_change_blocks_and_pairs():
+    lines = parse.parse_unified(TWO_HUNKS).lines
+    blocks = parse.change_blocks(lines)
+    assert blocks == [(1, 3), (5, 6)]
+    assert parse.paired_lines(lines, blocks[0]) == [(1, 2)]
+    assert parse.paired_lines(lines, blocks[1]) == []
+
+
+def test_char_ranges():
+    old_r, new_r = parse.char_ranges("    self.viewport = xy", "    self.viewport = (x, y)")
+    assert old_r == []
+    assert new_r == [(20, 21), (22, 24), (25, 26)]
+    assert parse.char_ranges("foo = bar", "foo = baz") == ([(8, 9)], [(8, 9)])
+    assert parse.char_ranges("completely", "different!!!") == ([], [])
+    assert parse.char_ranges("a" * 1500, "a" * 1499 + "b") == ([], [])
+
+
+def test_line_for_open():
+    lines = parse.parse_unified(TWO_HUNKS).lines
+    assert parse.line_for_open(lines, 1) == 2  # deleted row -> following line
+    assert parse.line_for_open(lines, 6) == 12
+    assert parse.line_for_open([], 5) == 1
+    only_deleted = parse.parse_unified(DELETED).lines
+    assert parse.line_for_open(only_deleted, 1) == 1