Add "list" command implementation

tests/test__zk_list.sh

@@ -0,0 +1,37 @@
+#!/bin/bash
+TMP_ZETTELKASTEN=""
+
+setup() {
+	source ../zk
+
+	TMP_ZETTELKASTEN="$(mktemp -d)"
+}
+
+teardown() {
+	rm -rf "$TMP_ZETTELKASTEN"
+}
+
+test__zk_list_outputs_correct_format_with_one_zettel() {
+    export ZKDIR="$TMP_ZETTELKASTEN"
+    test_zettel="aaaaaaaaaaaaaa" 
+    echo "# Test Zettel" > "$TMP_ZETTELKASTEN/$test_zettel"
+
+    result="$(_zk_list)"
+
+    expected="$test_zettel | # Test Zettel"
+    assert_equals "$expected" "$result"
+}
+
+test__zk_list_outputs_correct_format_with_multiple_zettels() {
+    export ZKDIR="$TMP_ZETTELKASTEN"
+    test_zettel1="aaaaaaaaaaaaaa" 
+    test_zettel2="bbbbbbbbbbbbbb" 
+    echo "# Test Zettel 1" > "$TMP_ZETTELKASTEN/$test_zettel1"
+    echo "# Test Zettel 2" > "$TMP_ZETTELKASTEN/$test_zettel2"
+
+    result="$(_zk_list)"
+
+    expected="$test_zettel1 | # Test Zettel 1
+$test_zettel2 | # Test Zettel 2"
+    assert_equals "$expected" "$result"
+}

tests/test_main.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+setup() {
+	source ../zk
+}
+
+test_main_calls_new_when_new_command_passed() {
+	expected="_zk_new"
+	fake get_commands 'echo new'
+	fake _zk_new "echo $expected"
+
+	result="$(main)"
+
+	assert_equals "$expected" "$result"
+}
+
+test_main_calls_list_when_list_command_passed() {
+	expected="_zk_list"
+	fake get_commands 'echo list'
+	fake _zk_list "echo $expected"
+
+	result="$(main)"
+
+	assert_equals "$expected" "$result"
+}

zk

@@ -1,5 +1,6 @@
 #!/bin/sh
 
+ZKDIR="$HOME/.local/share/zk/"
 COMMANDS='list new delete'
 
 get_command() {
@@ -13,9 +14,15 @@ get_command() {
 	done
 }
 
+_zk_list() {
+	for zettel in "$ZKDIR"/*; do
+		echo "$(basename "$zettel") | $(head -1 "$zettel")"
+	done
+}
+
 main() {
 	subcommand="$(get_commands "$COMMANDS" "$1")"
-	echo "$subcommand"
+	_zk_"$subcommand"
 }
 
 name="$(basename "$0")"