Implement edit command

tests/test__zk_edit.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+
+setup() {
+    source ../zk
+}
+
+test__zk_edit_uses_filename_when_passed_as_parameter() {
+    # shellcheck disable=SC2016
+    fake vi 'echo vi "${FAKE_PARAMS[@]}"'
+
+    export EDITOR=""
+    zettel_name="11111111111111"
+    expected="vi $ZKDIR/$zettel_name"
+
+    result="$(_zk_edit $zettel_name)"
+
+    assert_equals "$expected" "$result"
+}
+
+test__zk_edit_uses__zk_search_when_filename_not_passed_as_parameter() {
+    export EDITOR=""
+    zettel_name="11111111111111"
+    expected="vi $ZKDIR/$zettel_name"
+
+    # shellcheck disable=SC2016
+    fake vi 'echo vi "${FAKE_PARAMS[@]}"'
+    fake _zk_search echo "$zettel_name"
+
+    result="$(_zk_edit)"
+
+    assert_equals "$expected" "$result"
+}

zk

@@ -39,6 +39,16 @@ _zk_new() {
 	fi
 }
 
+_zk_edit() {
+	filename="$1"
+
+	if test -z "$filename"; then
+		filename="$(_zk_search)"
+	fi
+
+	vi "$ZKDIR/$filename"
+}
+
 main() {
 	subcommand="$(get_command "$ZKCOMMANDS" "$1")"
 	_zk_"$subcommand"