Add missing tests

Author: maxmousee

lexer_test.go

@@ -65,3 +65,19 @@ func TestLookupType(t *testing.T) {
 	assertions.Equal([]string{"if", "for"}, result.Words)
 	assertions.Equal(false, result.CaseSensitive)
 }
+
+func TestLookupTypeNotFound(t *testing.T) {
+	assertions := assert.New(t)
+
+	tokenTypes := []TokenType{}
+	tokenTypes = append(tokenTypes, TokenType{
+		Type:          "keyword",
+		Words:         []string{"if", "for"},
+		CaseSensitive: false,
+	})
+
+	result := LookupType("var", tokenTypes)
+	assertions.Equal("", result.Type)
+	assertions.Equal([]string{""}, result.Words)
+	assertions.Equal(false, result.CaseSensitive)
+}

stringutils_test.go

@@ -237,3 +237,34 @@ func TestWordSplit(t *testing.T) {
 	result = WordSplit("")
 	assertions.Equal([]string{""}, result)
 }
+
+func TestIsAlphabet(t *testing.T) {
+	assertions := assert.New(t)
+
+	result := IsAlphabet('a')
+	assertions.True(result)
+
+	result = IsAlphabet('Á')
+	assertions.True(result)
+
+	result = IsAlphabet('ç')
+	assertions.True(result)
+
+	result = IsAlphabet('æ')
+	assertions.True(result)
+
+	result = IsAlphabet('中')
+	assertions.False(result)
+
+	result = IsAlphabet('🎯')
+	assertions.False(result)
+
+	result = IsAlphabet('\u4E00')
+	assertions.False(result)
+
+	result = IsAlphabet('\u3400')
+	assertions.False(result)
+
+	result = IsAlphabet('\U00020000')
+	assertions.False(result)
+}