add ui snapshot tests

these tests are used to assert on Ouch's output for error reports and
progress logging

Cargo.toml

@@ -45,6 +45,7 @@ clap_mangen = "0.2.13"
 [dev-dependencies]
 assert_cmd = "2.0.12"
 infer = "0.15.0"
+insta = "1.31.0"
 parse-display = "0.8.2"
 proptest = "1.2.0"
 rand = { version = "0.8.5", default-features = false, features = ["small_rng", "std"] }

tests/snapshots/ui__ui_test_err_compress_missing_extension.snap

@@ -0,0 +1,14 @@
+---
+source: tests/ui.rs
+expression: "run_ouch(\"ouch compress input output\", dir)"
+---
+[ERROR] Cannot compress to 'output'.
+ - You shall supply the compression format
+
+hint: Try adding supported extensions (see --help):
+hint:   ouch compress <FILES>... output.tar.gz
+hint:   ouch compress <FILES>... output.zip
+hint: 
+hint: Alternatively, you can overwrite this option by using the '--format' flag:
+hint:   ouch compress <FILES>... output --format tar.gz
+

tests/snapshots/ui__ui_test_err_decompress_missing_extension.snap

@@ -0,0 +1,14 @@
+---
+source: tests/ui.rs
+expression: "run_ouch(\"ouch decompress a\", dir)"
+---
+[ERROR] Cannot decompress files without extensions
+ - Files without supported extensions: <FOLDER>/a
+ - Decompression formats are detected automatically by the file extension
+
+hint: Provide a file with a supported extension:
+hint:   ouch decompress example.tar.gz
+hint: 
+hint: Or overwrite this option with the '--format' flag:
+hint:   ouch decompress <FOLDER>/a --format tar.gz
+

tests/snapshots/ui__ui_test_err_missing_files-2.snap

@@ -0,0 +1,7 @@
+---
+source: tests/ui.rs
+expression: "run_ouch(\"ouch decompress a b\", dir)"
+---
+[ERROR] failed to canonicalize path `a`
+ - File not found
+

tests/snapshots/ui__ui_test_err_missing_files-3.snap

@@ -0,0 +1,7 @@
+---
+source: tests/ui.rs
+expression: "run_ouch(\"ouch list a b\", dir)"
+---
+[ERROR] failed to canonicalize path `a`
+ - File not found
+

tests/snapshots/ui__ui_test_err_missing_files.snap

@@ -0,0 +1,7 @@
+---
+source: tests/ui.rs
+expression: "run_ouch(\"ouch compress a b\", dir)"
+---
+[ERROR] failed to canonicalize path `a`
+ - File not found
+

tests/snapshots/ui__ui_test_ok_compress-2.snap

@@ -0,0 +1,6 @@
+---
+source: tests/ui.rs
+expression: "run_ouch(\"ouch compress input output.gz\", dir)"
+---
+[INFO] Successfully compressed 'output.gz'.
+

tests/snapshots/ui__ui_test_ok_compress.snap

@@ -0,0 +1,7 @@
+---
+source: tests/ui.rs
+expression: "run_ouch(\"ouch compress input output.zip\", dir)"
+---
+[INFO] Compressing 'input'.
+[INFO] Successfully compressed 'output.zip'.
+

tests/snapshots/ui__ui_test_ok_decompress.snap

@@ -0,0 +1,8 @@
+---
+source: tests/ui.rs
+expression: "run_ouch(\"ouch decompress output.zst\", dir)"
+---
+[INFO] Failed to confirm the format of `output` by sniffing the contents, file might be misnamed
+[INFO] Successfully decompressed archive in current directory.
+[INFO] Files unpacked: 1
+

tests/snapshots/ui__ui_test_usage_help_flag-2.snap

@@ -0,0 +1,25 @@
+---
+source: tests/ui.rs
+expression: "output_to_string(ouch!(\"-h\"))"
+---
+A command-line utility for easily compressing and decompressing files and directories.
+
+Usage: ouch [OPTIONS] <COMMAND>
+
+Commands:
+  compress    Compress one or more files into one output file [aliases: c]
+  decompress  Decompresses one or more files, optionally into another folder [aliases: d]
+  list        List contents of an archive [aliases: l, ls]
+  help        Print this message or the help of the given subcommand(s)
+
+Options:
+  -y, --yes              Skip [Y/n] questions positively
+  -n, --no               Skip [Y/n] questions negatively
+  -A, --accessible       Activate accessibility mode, reducing visual noise [env: ACCESSIBLE=]
+  -H, --hidden           Ignores hidden files
+  -q, --quiet            Silences output
+  -g, --gitignore        Ignores files matched by git's ignore files
+  -f, --format <FORMAT>  Specify the format of the archive
+  -h, --help             Print help (see more with '--help')
+  -V, --version          Print version
+