xzgrep: Improve the test script.
Now it should be close to the functionality of the original
version by Pavel Raiskup.
diff --git a/tests/xzgrep_expected_output b/tests/xzgrep_expected_output
new file mode 100644
index 0000000..e531d93
--- /dev/null
+++ b/tests/xzgrep_expected_output
@@ -0,0 +1,39 @@
+=> xzgrep el <=
+xzgrep_test_1.xz:elit, sed do eiusmod tempor incididunt ut
+xzgrep_test_1.xz:in voluptate velit esse cillum dolore eu
+xzgrep_test_2.xz:Hello
+retval 0
+=> xzgrep -l el <=
+xzgrep_test_1.xz
+xzgrep_test_2.xz
+retval 0
+=> xzgrep -h el <=
+elit, sed do eiusmod tempor incididunt ut
+in voluptate velit esse cillum dolore eu
+Hello
+retval 0
+=> xzgrep -H el <=
+xzgrep_test_1.xz:elit, sed do eiusmod tempor incididunt ut
+xzgrep_test_1.xz:in voluptate velit esse cillum dolore eu
+xzgrep_test_2.xz:Hello
+retval 0
+=> xzgrep Hello <=
+xzgrep_test_2.xz:Hello
+retval 0
+=> xzgrep -l Hello <=
+xzgrep_test_2.xz
+retval 0
+=> xzgrep -h Hello <=
+Hello
+retval 0
+=> xzgrep -H Hello <=
+xzgrep_test_2.xz:Hello
+retval 0
+=> xzgrep NOMATCH <=
+retval 1
+=> xzgrep -l NOMATCH <=
+retval 1
+=> xzgrep -h NOMATCH <=
+retval 1
+=> xzgrep -H NOMATCH <=
+retval 1
