Add some lsdiff tests

Makefile.am

@@ -186,6 +186,9 @@ TESTS = tests/newline1/run-test \
 	tests/lsdiff13/run-test \
 	tests/lsdiff14/run-test \
 	tests/lsdiff15/run-test \
+	tests/lsdiff-hunks-option/run-test \
+	tests/lsdiff-lines-option/run-test \
+	tests/lsdiff-verbose-levels/run-test \
 	tests/patchview1/run-test \
 	tests/patchview2/run-test \
 	tests/fuzz1/run-test \
@@ -307,7 +310,9 @@ TESTS = tests/newline1/run-test \
 XFAIL_TESTS = \
 	tests/delhunk5/run-test \
 	tests/delhunk6/run-test \
-	tests/rediff-empty-hunk/run-test
+	tests/rediff-empty-hunk/run-test \
+	tests/lsdiff-hunks-option/run-test \
+	tests/lsdiff-lines-option/run-test
 
 test-perms: src/combinediff$(EXEEXT) src/flipdiff$(EXEEXT) \
 		src/lsdiff$(EXEEXT) src/grepdiff$(EXEEXT) src/patchview$(EXEEXT) \

tests/lsdiff-hunks-option/run-test

@@ -0,0 +1,90 @@
+#!/bin/sh
+
+# This is a lsdiff(1) testcase for --hunks option.
+# Test: Select specific hunks from files
+
+. ${top_srcdir-.}/tests/common.sh
+
+cat << EOF > diff
+--- file1
++++ file1
+@@ -1 +1,2 @@
+-A
++a
++b
+--- file2
++++ file2
+@@ -5 +5,2 @@
+-E
++e
++f
+@@ -20 +21,2 @@
+-G
++g
++h
+--- file3
++++ file3
+@@ -10 +10,2 @@
+-I
++i
++j
+@@ -15 +16,2 @@
+-K
++k
++l
+@@ -25 +27,2 @@
+-M
++m
++n
+EOF
+
+# Test --hunks 1 (first hunk - all files have at least 1 hunk)
+${LSDIFF} --hunks 1 diff 2>errors >hunks1 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - hunks1 || exit 1
+file1
+file2
+file3
+EOF
+
+# Test --hunks 2 (second hunk - only file2 and file3 have 2+ hunks)
+${LSDIFF} --hunks 2 diff 2>errors >hunks2 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - hunks2 || exit 1
+file2
+file3
+EOF
+
+# Test --hunks 3 (third hunk - only file3 has 3 hunks)
+${LSDIFF} --hunks 3 diff 2>errors >hunks3 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - hunks3 || exit 1
+file3
+EOF
+
+# Test --hunks 1-2 (range: first and second hunks - all files have hunk 1, file2 and file3 have hunk 2)
+${LSDIFF} --hunks 1-2 diff 2>errors >hunks1-2 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - hunks1-2 || exit 1
+file1
+file2
+file3
+EOF
+
+# Test --hunks 2-3 (range: second and third hunks - file2 has hunk 2, file3 has hunks 2 and 3)
+${LSDIFF} --hunks 2-3 diff 2>errors >hunks2-3 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - hunks2-3 || exit 1
+file2
+file3
+EOF
+
+# Test --hunks 4 (fourth hunk - no files have 4 hunks, should be empty)
+${LSDIFF} --hunks 4 diff 2>errors >hunks4 || exit 1
+[ -s errors ] && exit 1
+[ -s hunks4 ] && exit 1  # Should be empty

tests/lsdiff-lines-option/run-test

@@ -0,0 +1,65 @@
+#!/bin/sh
+
+# This is a lsdiff(1) testcase for --lines option.
+# Test: Select files containing hunks that touch specific line numbers
+
+. ${top_srcdir-.}/tests/common.sh
+
+cat << EOF > diff
+--- file1
++++ file1
+@@ -1 +1,2 @@
+-A
++a
++b
+@@ -10 +11,2 @@
+-C
++c
++d
+--- file2
++++ file2
+@@ -5 +5,2 @@
+-E
++e
++f
+@@ -20 +21,2 @@
+-G
++g
++h
+--- file3
++++ file3
+@@ -15 +15,2 @@
+-I
++i
++j
+EOF
+
+# Test --lines 1 (files with hunks touching line 1)
+${LSDIFF} --lines 1 diff 2>errors >lines1 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - lines1 || exit 1
+file1
+EOF
+
+# Test --lines 5 (files with hunks touching line 5)
+${LSDIFF} --lines 5 diff 2>errors >lines5 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - lines5 || exit 1
+file2
+EOF
+
+# Test --lines 10-15 (range: files with hunks touching lines 10-15)
+${LSDIFF} --lines 10-15 diff 2>errors >lines10-15 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - lines10-15 || exit 1
+file1
+file3
+EOF
+
+# Test --lines 100 (line that doesn't exist - should be empty)
+${LSDIFF} --lines 100 diff 2>errors >lines100 || exit 1
+[ -s errors ] && exit 1
+[ -s lines100 ] && exit 1  # Should be empty

tests/lsdiff-verbose-levels/run-test

@@ -0,0 +1,60 @@
+#!/bin/sh
+
+# This is a lsdiff(1) testcase for multiple verbose levels.
+# Test: -v, -vv, and -nvv for different levels of verbosity
+
+. ${top_srcdir-.}/tests/common.sh
+
+cat << EOF > diff
+--- file1
++++ file1
+@@ -1,3 +1,4 @@ function1
+ first line
+-old content
++new content
++added line
+ third line
+@@ -10,4 +11,3 @@ function2
+ context line
+-removed line
+ another line
+-old ending
++new ending
+--- file2
++++ file2
+@@ -5,2 +5,3 @@ main
+ some context
+-original text
++modified text
++extra line
+EOF
+
+# Test single -v (basic verbose - same as no flags for lsdiff)
+${LSDIFF} -v diff 2>errors >verbose1 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - verbose1 || exit 1
+file1
+file2
+EOF
+
+# Test double -vv (extra verbose - same as single -v for lsdiff)
+${LSDIFF} -vv diff 2>errors >verbose2 || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - verbose2 || exit 1
+file1
+file2
+EOF
+
+# Test -nvv (numbered extra verbose)
+${LSDIFF} -nvv diff 2>errors >verbose_nvv || exit 1
+[ -s errors ] && exit 1
+
+cat << EOF | cmp - verbose_nvv || exit 1
+1	File #1  	file1
+	3	Hunk #1	function1
+	9	Hunk #2	function2
+15	File #2  	file2
+	17	Hunk #1	main
+EOF