Is she testing me?

this girl in my work place she shows me sign she like smiling, looking deeply into my eyes, giggle at my silly jokes but she does this hot and cold thing, sometimes she ignores me and then she doesn't driving me mad, like today she would not make eye contacted or say anything so i ignored her back but at the end of the shift i said bye to her and she said bye back smiling at with a high voice. i have heard of when a girl test you when they like/interested, is this what she is doing or im aye going mad
Is she testing me?
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