From 1c8f5ffe7eeb227801c006ed1bfa27d5c0921fc3 Mon Sep 17 00:00:00 2001
From: Maurice Makaay <maurice@makaay.nl>
Date: Tue, 18 Jun 2019 23:24:23 +0000
Subject: [PATCH] Added booleans ...that was boring.

---
 value_boolean.go      | 19 +++++++++++++++++++
 value_boolean_test.go | 20 ++++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 value_boolean.go
 create mode 100644 value_boolean_test.go

diff --git a/value_boolean.go b/value_boolean.go
new file mode 100644
index 0000000..f42a0df
--- /dev/null
+++ b/value_boolean.go
@@ -0,0 +1,19 @@
+package parser
+
+import (
+	"git.makaay.nl/mauricem/go-parsekit/parse"
+)
+
+var (
+	// Booleans are just the tokens you're used to. Always lowercase.
+	trueOrFalse = a.Str("true").Or(a.Str("false"))
+)
+
+func (t *parser) startBoolean(p *parse.API) {
+	switch {
+	case p.Accept(tok.Boolean(nil, trueOrFalse)):
+		t.emitCommand(csetBoolVal, p.Result().Value(0).(bool))
+	default:
+		p.Expected("true or false")
+	}
+}
diff --git a/value_boolean_test.go b/value_boolean_test.go
new file mode 100644
index 0000000..182e252
--- /dev/null
+++ b/value_boolean_test.go
@@ -0,0 +1,20 @@
+package parser
+
+import (
+	"testing"
+)
+
+func TestBoolean(t *testing.T) {
+	for _, test := range []parseTest{
+		{``, []string{`Error: unexpected end of file (expected true or false) at start of file`}},
+		{`true`, []string{`boolean(true)`}},
+		{`false`, []string{`boolean(false)`}},
+		{`yes`, []string{`Error: unexpected input (expected true or false) at start of file`}},
+		{`no`, []string{`Error: unexpected input (expected true or false) at start of file`}},
+		{`1`, []string{`Error: unexpected input (expected true or false) at start of file`}},
+		{`0`, []string{`Error: unexpected input (expected true or false) at start of file`}},
+	} {
+		p := &parser{}
+		testParseHandler(t, p, p.startBoolean, test)
+	}
+}