Add initial support for custom sniffing

tests/project-root1.sh

@@ -74,5 +74,41 @@ testWfRoot() {
     assertEquals "$expected" "$got"
 }
 
+testNoCustomSniffer001() {
+    dir=$(mktemp -d --tmpdir would-reformat-testProjectRoot001.XXXXXX)
+    cd "$dir" || exit
+    git init >/dev/null 2>&1
+    "$DIR"/../install.sh 2>&2 >/dev/null
+
+    touch perl-file.pl
+    touch typescript-file.ts
+
+    out1=$(sniff_file_type "$(pwd)"/perl-file.pl)
+    out2=$(sniff_file_type "$(pwd)"/typescript-file.ts)
+
+    assertEquals "perl" "$out1"
+    assertEquals "typescript" "$out2"
+}
+
+testCustomSniffer001() {
+    dir=$(mktemp -d --tmpdir would-reformat-testProjectRoot001.XXXXXX)
+    cd "$dir" || exit
+    git init >/dev/null 2>&1
+    "$DIR"/../install.sh 2>&2 >/dev/null
+
+    mkdir -p .would-reformat || exit 1
+    cp "$(wf_root)"/examples/custom-sniffer ./.would-reformat/custom-sniffer || exit 1
+    chmod +x ./.would-reformat/custom-sniffer || exit 1
+
+    touch prolog-file.pl
+    touch qt-translation-file.ts
+
+    out1=$(sniff_file_type "$(pwd)"/prolog-file.pl)
+    out2=$(sniff_file_type "$(pwd)"/qt-translation-file.ts)
+
+    assertEquals "prolog" "$out1"
+    assertEquals "qt-translation" "$out2"
+}
+
 # shellcheck disable=SC1091
 source shunit2