Your test suite just checks whether a quadrilateral has equal sides, but that's not enough to form a square: rhombuses also have equal sides. Therefore, the test suite should also check a solution's angles.
PS: A test case filled with rhombuses and a single square on the curve would be instructional too.
Find the sum of all the numbers of the input vector
Determine if input is odd
Bottles of beer
Create a square matrix of multiples
Calculate the area of a triangle between three points
Determine the Result of a Move in Reversi
Would Homer Like It?
Find the Final State of an Abelian Sandpile
Formatting currency numbers
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