Add addl wf_root test

tests/project-root1.sh

@@ -61,7 +61,7 @@ testNoramlizeDirOfFile001() {
     assertEquals "$expected" "$out/tests/.."
 }
 
-testWfRoot() {
+testWfRoot001() {
     expected=$(normalize_dir_of_file "$DIR/../install.sh")
 
     dir=$(mktemp -d --tmpdir would-reformat-testProjectRoot001.XXXXXX)
@@ -69,7 +69,17 @@ testWfRoot() {
     git init >/dev/null 2>&1
     "$DIR"/../install.sh 2>&2 >/dev/null
 
-    got=$(wf_root "$(pwd)")
+    got=$(wf_root)
+
+    assertEquals "$expected" "$got"
+}
+
+testWfRoot002() {
+    expected=$(normalize_dir_of_file "$DIR/../install.sh")
+
+    export WF_ROOT="$expected"
+
+    got=$(wf_root)
 
     assertEquals "$expected" "$got"
 }