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I found Viola Desmond was the first woman whose case was taken up in the courts, and it wasn't that she tried to sue them for throwing her out of the theatre; it was that they took the law and used it to arrest her. That was really shocking to me. We had no laws in Canada actually requiring segregation, like they did in the United States. But here we had people using the law - the amusements tax act - to enforce segregation, and our courts allowed them to do that.

Source: www.macleans.ca
I found Viola Desmond was the first woman whose case was taken up in the courts, and it wasn't that she tried to sue them for throwing her out of the theatre; it was that they took the law and used it to arrest her.