test(processor): preservation, preserve-lines, backup cases

internal/processor/testdata/go_preserve.go

@@ -0,0 +1,2 @@
+x := 1 // TODO: fix
+y := 2 // remove me

internal/processor/testdata/go_preserve.go.golden

@@ -0,0 +1,2 @@
+x := 1 // TODO: fix
+y := 2

internal/processor/testdata/go_wildcard.go

@@ -0,0 +1,2 @@
+a := 1 // this is IMPORTANT stuff
+b := 2 // trivial

internal/processor/testdata/go_wildcard.go.golden

@@ -0,0 +1,2 @@
+a := 1 // this is IMPORTANT stuff
+b := 2

internal/processor/testdata/py_backup.py

@@ -0,0 +1,2 @@
+# gone
+keep = 1

internal/processor/testdata/py_backup.py.golden

@@ -0,0 +1 @@
+keep = 1

internal/processor/testdata/py_preserve_lines.py

@@ -0,0 +1,3 @@
+x = 1
+    # indented comment
+y = 2

internal/processor/testdata/py_preserve_lines.py.golden

@@ -0,0 +1,3 @@
+x = 1
+    
+y = 2

internal/processor/wholefile_test.go

@@ -101,6 +101,13 @@ func TestWholeFile(t *testing.T) {
 		{name: "multiple single-line blocks on one line", file: "c_multiblock.c"},
 		{name: "--inline removes only line comments", file: "js_inline_flag.js", cli: types.CLI{Inline: true}},
 		{name: "--block removes only block comments", file: "js_block_flag.js", cli: types.CLI{Block: true}},
+		{name: "preserve exact pattern TODO", file: "go_preserve.go"},
+		{name: "preserve wildcard IMPORTANT", file: "go_wildcard.go",
+			cfg: &config.Config{Preserve: []string{"*IMPORTANT*"}, ContextLines: 3}},
+		{name: "--preserve-lines keeps comment-only line as blank", file: "py_preserve_lines.py",
+			cli: types.CLI{PreserveLines: true}},
+		{name: "--backup writes .bak of original", file: "py_backup.py",
+			cli: types.CLI{Backup: true}, wantBackup: true},
 	}
 
 	for _, tc := range cases {