Add test for IsLetter()

diff --git a/modules/base/tool_test.go b/modules/base/tool_test.go
index 052a2f0dec94291ff36ac53316bf5dea8acaeda6..4f64d3728d91e3e1971ffdd7f7f13a35275a43e3 100644 (file)
--- a/modules/base/tool_test.go
+++ b/modules/base/tool_test.go
@@ -161,7 +161,21 @@ func TestInt64sToMap(t *testing.T) {
        )
 }
 
-// TODO: IsLetter()
+func TestIsLetter(t *testing.T) {
+       assert.True(t, IsLetter('a'))
+       assert.True(t, IsLetter('e'))
+       assert.True(t, IsLetter('q'))
+       assert.True(t, IsLetter('z'))
+       assert.True(t, IsLetter('A'))
+       assert.True(t, IsLetter('E'))
+       assert.True(t, IsLetter('Q'))
+       assert.True(t, IsLetter('Z'))
+       assert.True(t, IsLetter('_'))
+       assert.False(t, IsLetter('-'))
+       assert.False(t, IsLetter('1'))
+       assert.False(t, IsLetter('$'))
+}
+
 // TODO: IsTextFile()
 // TODO: IsImageFile()
 // TODO: IsPDFFile()