131 lines
3.3 KiB
Python
131 lines
3.3 KiB
Python
import pytest
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import tempfile
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import os
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from pathlib import Path
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from src.diff_viewer import (
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parse_diff, DiffFile, DiffHunk, parse_hunk_header,
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get_line_color, apply_patch_to_file
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)
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def test_parse_diff_empty() -> None:
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result = parse_diff("")
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assert result == []
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def test_parse_diff_none() -> None:
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result = parse_diff(None) # type: ignore
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assert result == []
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def test_parse_simple_diff() -> None:
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diff_text = """--- a/src/test.py
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+++ b/src/test.py
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@@ -1 +1 @@
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-old
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+new"""
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result = parse_diff(diff_text)
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assert len(result) == 1
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assert result[0].old_path == "src/test.py"
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assert result[0].new_path == "src/test.py"
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assert len(result[0].hunks) == 1
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assert result[0].hunks[0].header == "@@ -1 +1 @@"
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def test_parse_diff_with_context() -> None:
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diff_text = """--- a/src/example.py
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+++ b/src/example.py
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@@ -10,5 +10,6 @@
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def existing_function():
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pass
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- old_line
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+ old_line
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+ new_line
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more_code"""
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result = parse_diff(diff_text)
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assert len(result) == 1
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assert result[0].old_path == "src/example.py"
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assert len(result[0].hunks) == 1
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hunk = result[0].hunks[0]
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assert hunk.old_start == 10
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assert hunk.old_count == 5
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assert hunk.new_start == 10
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assert hunk.new_count == 6
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assert "- old_line" in hunk.lines
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assert "+ new_line" in hunk.lines
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def test_parse_multiple_files() -> None:
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diff_text = """--- a/file1.py
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+++ b/file1.py
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@@ -1 +1 @@
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-a
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+b
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--- a/file2.py
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+++ b/file2.py
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@@ -1 +1 @@
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-c
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+d"""
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result = parse_diff(diff_text)
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assert len(result) == 2
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assert result[0].old_path == "file1.py"
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assert result[1].old_path == "file2.py"
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def test_parse_hunk_header() -> None:
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result = parse_hunk_header("@@ -10,5 +10,6 @@")
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assert result == (10, 5, 10, 6)
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result = parse_hunk_header("@@ -1 +1 @@")
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assert result == (1, 1, 1, 1)
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def test_diff_line_classification() -> None:
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diff_text = """--- a/test.py
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+++ b/test.py
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@@ -1,3 +1,4 @@
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context line
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-removed line
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+removed line
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+added line
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another context"""
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result = parse_diff(diff_text)
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hunk = result[0].hunks[0]
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assert any(line.startswith("-") for line in hunk.lines)
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assert any(line.startswith("+") for line in hunk.lines)
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assert any(line.startswith(" ") or not line.startswith(("-", "+")) for line in hunk.lines)
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def test_get_line_color() -> None:
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assert get_line_color("+added") == "green"
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assert get_line_color("-removed") == "red"
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assert get_line_color("@@ -1,3 +1,4 @@") == "cyan"
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assert get_line_color(" context") == None
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def test_apply_patch_simple() -> None:
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with tempfile.TemporaryDirectory() as tmpdir:
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test_file = Path(tmpdir) / "test.py"
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test_file.write_text("old\n")
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patch = f"""--- a/{test_file.name}
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+++ b/{test_file.name}
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@@ -1 +1 @@
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-old
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+new"""
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success, msg = apply_patch_to_file(patch, tmpdir)
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assert success
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assert test_file.read_text() == "new\n"
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def test_apply_patch_with_context() -> None:
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with tempfile.TemporaryDirectory() as tmpdir:
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test_file = Path(tmpdir) / "example.py"
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test_file.write_text("line 1\nline 2\nline 3\n")
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patch = f"""--- a/{test_file.name}
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+++ b/{test_file.name}
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@@ -1,3 +1,3 @@
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-line 1
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-line 2
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+line one
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+line two
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line 3"""
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success, msg = apply_patch_to_file(patch, tmpdir)
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assert success
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content = test_file.read_text()
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assert "line one" in content
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assert "line two" in content
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