Implement "search" command

tests/test_search_command.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+
+setup() {
+    source ../zk
+}
+
+test__zk_search_calls__zk_list() {
+    expected="_zk_list"
+    fake _zk_list echo "$expected"
+    fake fzf cat
+
+    result="$(_zk_search)"
+
+    assert_equals "$expected" "$result"
+}
+
+test__zk_search_extracts_id_from_chosen_zettel() {
+    expected="1111111111111"
+    # shellcheck disable=SC2016
+    fake _zk_list 'echo "$expected | Zettel Title"'
+    fake fzf cat
+
+    result="$(_zk_search)"
+
+    assert_equals "$expected" "$result"
+}

zk

@@ -24,6 +24,10 @@ _zk_list() {
 	done
 }
 
+_zk_search() {
+	_zk_list | fzf --prompt "ZK: " | cut -d ' ' -f 1
+}
+
 _zk_new() {
 	filename="$(_zk_isosec)"
 	touch "$ZKDIR/$filename"