Added another test to demonstrate that the square root of a negative pure imaginary number is a complex number with real and imaginary

parts.

Author: hemalvarambhia

src/Math-Tests-Complex/PMComplexTest.class.st

@@ -626,6 +626,19 @@ PMComplexTest >> testSquareRootOfANegativeRealNumberIsPureImaginary [
 	self assert: squareRoot equals: 2 i. 
 ]
 
+{ #category : #tests }
+PMComplexTest >> testSquareRootOfNegativePureImaginaryNumberIsAComplexNumberWithRealAndImaginaryParts [
+   | squareRoot expected pureImaginaryNumber |
+	pureImaginaryNumber := PMComplex real: 0 imaginary: -4.
+	
+	squareRoot := pureImaginaryNumber sqrt.
+
+	expected := 2 sqrt negated + 2 sqrt i.
+	self assert: squareRoot real closeTo: expected real.
+	self assert: squareRoot imaginary closeTo: expected imaginary
+
+]
+
 { #category : #tests }
 PMComplexTest >> testSquareRootOfPositivePureImaginaryNumberIsAComplexNumberWithRealAndImaginaryParts [