From 886a16e706be713cbf5e03f26d044dd7cc90d842 Mon Sep 17 00:00:00 2001
From: tijani <tijani@tijanilawal.com>
Date: Sun, 7 Aug 2022 14:58:35 +0000
Subject: [PATCH] Spelling corrections Interpreter can now evaluate Booleans

git-svn-id: https://svn.tlawal.org/svn/monkey@45 f6afcba9-9ef1-4bdd-9b72-7484f5705bac
---
 evaluator/evaluator.go      |  3 +++
 evaluator/evaluator_test.go | 30 ++++++++++++++++++++++++++++++
 object/object.go            |  4 ++--
 3 files changed, 35 insertions(+), 2 deletions(-)

diff --git a/evaluator/evaluator.go b/evaluator/evaluator.go
index dc480b9..5ab22bf 100644
--- a/evaluator/evaluator.go
+++ b/evaluator/evaluator.go
@@ -17,6 +17,9 @@ func Eval(node ast.Node) object.Object {
 		// Expressions
 	case *ast.IntegerLiteral:
 		return &object.Integer{Value: node.Value}
+
+	case *ast.Boolean:
+		return &object.Boolean{Value: node.Value}
 	}
 
 	return nil
diff --git a/evaluator/evaluator_test.go b/evaluator/evaluator_test.go
index aceb434..ade6bd7 100644
--- a/evaluator/evaluator_test.go
+++ b/evaluator/evaluator_test.go
@@ -22,6 +22,22 @@ func TestEvalIntegerExpression(l_test *testing.T) {
 	}
 }
 
+func TestEvalBooleanExpression(l_test *testing.T){
+	tests := []struct {
+		input string
+		expected bool
+	}{
+		{"true", true},
+		{"false", false},
+	}
+
+	for _, tt := range tests{
+			evaluated := test_eval(tt.input)
+			test_boolean_object(l_test, evaluated, tt.expected)
+		}
+	}
+
+
 // Helpers
 func test_eval(input string) object.Object {
 	l_lexer := lexer.New(input)
@@ -43,3 +59,17 @@ func test_integer_object(l_test *testing.T, l_object object.Object, expected int
 	}
 	return true
 }
+
+func test_boolean_object(l_test *testing.T, l_object object.Object, expected bool)bool {
+	result, ok := l_object.(*object.Boolean)
+	if !ok {
+		l_test.Errorf("object is not Boolean, got=%T (%+v)", l_object, l_object)
+		return false
+	}
+
+	if result.Value != expected {
+		l_test.Errorf("object has wrong value, got=%T, want=%t", result.Value, expected)
+		return false
+	}
+	return true
+}
diff --git a/object/object.go b/object/object.go
index e81b429..1b48711 100644
--- a/object/object.go
+++ b/object/object.go
@@ -37,7 +37,7 @@ func (b *Boolean) Type() ObjectType {
 	return BOOLEAN_OBJECT
 }
 
-func (b *Boolean) Inpect() string {
+func (b *Boolean) Inspect() string {
 	return fmt.Sprintf("%t", b.Value)
 }
 
@@ -48,6 +48,6 @@ func (n *Null) Type() ObjectType {
 	return NULL_OBJECT
 }
 
-func (n *Null) Inpect() string {
+func (n *Null) Inspect() string {
 	return "null"
 }